NATEF Task Videos
 
This section contains 2013 NATEF Task Videos in all ASE Areas.
 
Quick Links - Click on an ASE photo below to jump to it's content
         
  (A1) Engine Repair   (A2) Automatic Transmission   (A3) Manual Drive Train Axles   (A4) Suspension and Steering  
                 
         
  (A5) Brakes   (A6) Electrical / Electronic Systems   (A7) Heating and Air Conditioning   (A8) Engine Performance  
                 
 
 
MLR - Maintenance & Light Repair
AST - Auto Service Technology (Includes MLR)
MAST - Master Auto Service Technology (Includes MLR and AST)
 
A. General: Engine Diagnosis; Removal and Reinstallation (R & R)
  Task Priority MLR AST MAST Animation Video
1. Complete work order to include customer information, vehicle identifying information, customer concern, related service history, cause, and correction. P-1  
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2. Research applicable vehicle and service information, vehicle service history, service precautions, and technical service bulletins. P-1
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3. Verify operation of the instrument panel engine warning indicators. P-1
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4. Inspect engine assembly for fuel, oil, coolant, and other leaks; determine necessary action. P-1
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5. Install engine covers using gaskets, seals, and sealers as required. P-1
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6. Remove and replace timing belt; verify correct camshaft timing. P-1
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7. Perform common fastener and thread repair, to include: remove broken bolt, restore internal and external threads, and repair internal threads with thread insert. P-1
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8. Inspect, remove and replace engine mounts. P-2  
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9. Identify hybrid vehicle internal combustion engine service precautions. P-3
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10. Remove and reinstall engine in an OBDII or newer vehicle; reconnect all attaching components and restore the vehicle to running condition. P-3  
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B. Cylinder Head and Valve Train Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Remove cylinder head; inspect gasket condition; install cylinder head and gasket; tighten according to manufacturer's specifications and procedures. P-1    
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2. Clean and visually inspect a cylinder head for cracks; check gasket surface areas for warpage and surface finish; check passage condition. P-1  
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3. Inspect pushrods, rocker arms, rocker arm pivots and shafts for wear, bending, cracks, looseness, and blocked oil passages (orifices); determine necessary action. P-2  
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4. Adjust valves (mechanical or hydraulic lifters). P-1
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5. Inspect and replace camshaft and drive belt/chain; includes checking drive gear wear and backlash, end play, sprocket and chain wear, overhead cam drive sprocket(s), drive belt(s), belt tension, tensioners, camshaft reluctor ring/tone-wheel, and valve timing components; verify correct camshaft timing. P-1  
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6. Establish camshaft position sensor indexing. P-1  
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7.

Inspect valve springs for squareness and free height comparison; determine necessary action.

P-3    
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8. Replace valve stem seals on an assembled engine; inspect valve spring retainers, locks/keepers, and valve lock/keeper grooves; determine necessary action. P-3    
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9. Inspect valve guides for wear; check valve stem-to-guide clearance; determine necessary action. P-3    
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10. Inspect valves and valve seats; determine necessary action. P-3    
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11. Check valve spring assembled height and valve stem height; determine necessary action. P-3    
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12. Inspect valve lifters; determine necessary action. P-2    
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13.

Inspect and/or measure camshaft for runout, journal wear and lobe wear.

P-2    
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14. Inspect camshaft bearing surface for wear, damage, out-of-round, and alignment; determine necessary action. P-3    
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C. Engine Block Assembly Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Remove, inspect, or replace crankshaft vibration damper (harmonic balancer). P-2  
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2. Disassemble engine block; clean and prepare components for inspection and reassembly. P-1    
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3. Inspect engine block for visible cracks, passage condition, core and gallery plug condition, and surface warpage; determine necessary action. P-2    
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4. Inspect and measure cylinder walls/sleeves for damage, wear, and ridges; determine necessary action. P-2    
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5. Deglaze and clean cylinder walls. P-2    
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6. Inspect and measure camshaft bearings for wear, damage, out-of-round, and alignment; determine necessary action. P-3    
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7. Inspect crankshaft for straightness, journal damage, keyway damage, thrust flange and sealing surface condition, and visual surface cracks;
check oil passage condition; measure end play and journal wear; check crankshaft position sensor reluctor ring (where applicable); determine necessary action.
P-1    
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8. Inspect main and connecting rod bearings for damage and wear; determine necessary action. P-2    
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9. Identify piston and bearing wear patterns that indicate connecting rod alignment and main bearing bore problems; determine necessary action. P-3    
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10. Inspect and measure piston skirts and ring lands; determine necessary action. P-2    
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11. Determine piston-to-bore clearance. P-2    
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12. Inspect, measure, and install piston rings. P-2    
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13. Inspect auxiliary shaft(s) (balance, intermediate, idler, counterbalance or silencer); inspect shaft(s) and support bearings for damage and wear; determine necessary action; reinstall and time. P-2    
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14. Assemble engine block. P-1    
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D. Lubrication and Cooling Systems Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Perform cooling system pressure and dye tests to identify leaks; check coolant condition and level; inspect and test radiator, pressure cap, coolant recovery tank, and heater core; determine necessary action. P-1
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2. Identify causes of engine overheating. P-1  
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3. Inspect, replace, and adjust drive belts, tensioners, and pulleys; check pulley and belt alignment. P-1
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4. Inspect and test coolant; drain and recover coolant; flush and refill cooling system with recommended coolant; bleed air as required. P-1
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5. Inspect, remove, and replace water pumps. P-2  
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6. Remove and replace radiator. P-2  
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7. Remove, inspect, and replace thermostat and gasket/seal. P-1
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8. Inspect and test fan(s) (electrical or mechanical), fan clutch, fan shroud, and air dams. P-1  
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9. Perform oil pressure tests; determine necessary action. P-1  
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10. Perform engine oil and filter change. P-1
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11. Inspect auxiliary coolers; determine necessary action. P-3  
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12. Inspect, test, and replace oil temperature and pressure switches and sensors. P-2  
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13. Inspect oil pump gears or rotors, housing, pressure relief devices, and pump drive; perform necessary action. P-2    
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MLR - Maintenance & Light Repair
AST - Auto Service Technology (Includes MLR)
MAST - Master Auto Service Technology (Includes MLR and AST)
 
A. Transmission and Transaxle Diagnosis
  Task Priority MLR AST MAST Animation Video
1. Identify and interpret transmission/transaxle concern, differentiate between engine performance and transmission/transaxle concerns; determine necessary action. P-1    
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2. Research applicable vehicle and service information, fluid type, vehicle service history, service precautions, and technical service bulletins. P-1
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3. Diagnose fluid loss and condition concerns; determine necessary action. P-1
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4. Check fluid level in a transmission or a transaxle equipped with a dip-stick. P-1
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5. Check fluid level in a transmission or a transaxle equipped without a dip-stick. P-1
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6. Perform pressure tests (including transmissions/transaxles equipped with electronic pressure control); determine necessary action. P-1    
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7. Diagnose noise and vibration concerns; determine necessary action. P-2    
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8. Perform stall test; determine necessary action. P-3  
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9. Perform lock-up converter system tests; determine necessary action. P-3  
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10. Diagnose transmission/transaxle gear reduction/multiplication concerns using driving, driven, and held member (power flow) principles. P-1  
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11. Diagnose electronic transmission/transaxle control systems using appropriate test equipment and service information. P-1    
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12. Diagnose pressure concerns in a transmission using hydraulic principles (Pascal’s Law). P-2  
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B. In-Vehicle Transmission/Transaxle Maintenance and Repair
  Task Priority MLR AST MAST Animation Video
1. Inspect, adjust, and replace external manual valve shift linkage, transmission range sensor/switch, and park/neutral position switch. P-2  
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2. Inspect for leakage; replace external seals, gaskets, and bushings. P-2
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3. Inspect, test, adjust, repair, or replace electrical/electronic components and circuits including computers, solenoids, sensors, relays, terminals, connectors, switches, and harnesses. P-1  
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4. Drain and replace fluid and filter(s). P-1
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5. Inspect, replace and align powertrain mounts. P-2
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C. Off-Vehicle Transmission and Repair
  Task Priority MLR AST MAST Animation Video
1. Remove and reinstall transmission/transaxle and torque converter; inspect engine core plugs, rear crankshaft seal, dowel pins, dowel pin holes, and mating surfaces. P-1  
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2. Describe the operational characteristics of an electronically-controlled manual transmission/transaxle. P-1  
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3. Diagnose noise concerns through the application of transmission/transaxle powerflow principles. P-2  
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4. Diagnose hard shifting and jumping out of gear concerns; determine necessary action. P-3
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5. Diagnose transaxle final drive assembly noise and vibration concerns; determine necessary action. P-3
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6. Disassemble, inspect clean, and reassemble internal transmission/transaxle components. P-2    
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7. Inspect, measure, clean, and replace valve body (includes surfaces, bores, springs, valves, sleeves, retainers, brackets, check valves/balls, screens, spacers, and gaskets). P-2    
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8. Inspect servo and accumulator bores, pistons, seals, pins, springs, and retainers; determine necessary action. P-2      
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9. Assemble transmission/transaxle. P-2    
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10. Inspect, measure, and reseal oil pump assembly and components. P-2    
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11. Measure transmission/transaxle end play or preload; determine necessary action. P-1    
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12. Inspect, measure, and replace thrust washers and bearings. P-2      
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13. Inspect oil delivery circuits, including seal rings, ring grooves, and sealing surface areas, feed pipes, orifices, and check valves/balls. P-2        
14. Inspect bushings; determine necessary action. P-2      
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15. Inspect and measure planetary gear assembly components; determine necessary action. P-2    
Animation 1
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16. Inspect case bores, passages, bushings, vents, and mating surfaces; determine necessary action. P-2      
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17. Diagnose and inspect transaxle drive, link chains, sprockets, gears, bearings, and bushings; perform necessary action. P-2      
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18. Inspect measure, repair, adjust or replace transaxle final drive components. P-2    
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19. Inspect clutch drum, piston, check-balls, springs, retainers, seals, and friction and pressure plates, bands and drums; determine necessary action. P-2      
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20. Measure clutch pack clearance; determine necessary action. P-1    
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21. Air test operation of clutch and servo assemblies. P-1    
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22. Inspect roller and sprag clutch, races, rollers, sprags, springs, cages, retainers; determine necessary action. P-2    
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MLR - Maintenance & Light Repair
AST - Auto Service Technology (Includes MLR)
MAST - Master Auto Service Technology (Includes MLR and AST)
 
A. General: Drive Train Diagnosis
  Task Priority MLR AST MAST Animation Video
1. Identify and interpret drive train concerns; determine necessary action. P-1    
Video 1
Video 2
2. Research applicable vehicle and service information, fluid type, vehicle service history, service precautions, and technical service bulletins. P-1
Video 1
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3. Check fluid condition; check for leaks; determine necessary action. P-1
Video 1
4. Drain and refill manual transmission/transaxle and final drive unit. P-1
Video 1
Video 2
B. Clutch Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose clutch noise, binding, slippage, pulsation, and chatter; determine necessary action. P-1    
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2. Inspect clutch pedal linkage, cables, automatic adjuster mechanisms, brackets, bushings, pivots, and springs; perform necessary action. P-1  
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3. Inspect and replace clutch pressure plate assembly, clutch disc, release (throw-out) bearing and linkage, and pilot bearing/bushing (as applicable). P-1  
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4. Bleed clutch hydraulic system. P-1  
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5. Check and adjust clutch master cylinder fluid level; check for leaks. P-1
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6. Inspect flywheel and ring gear for wear and cracks; determine necessary action. P-1  
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7.

Measure flywheel runout and crankshaft end play; determine necessary action.

P-2  
Video 1
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C. Transmission/Transaxle Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Inspect, adjust, and reinstall shift linkages, brackets, bushings, cables, pivots, and levers. P-2    
Video 1
Video 2
2. Describe the operational characteristics of an electronically-controlled manual transmission/transaxle. P-3
Video 1
3. Diagnose noise concerns through the application of transmission/transaxle powerflow principles. P-2    
Video 1
4. Diagnose hard shifting and jumping out of gear concerns; determine necessary action. P-2    
Video 1
5. Diagnose transaxle final drive assembly noise and vibration concerns; determine necessary action. P-3    
Video 1
6. Disassemble, inspect clean, and reassemble internal transmission/transaxle components. P-3    
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D. Drive Shaft and Half Shaft, Universal and Constant-Velocity (CV) Joint Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose constant-velocity (CV) joint noise and vibration concerns; determine necessary action. P-1    
Video 1
2. Diagnose universal joint noise and vibration concerns; perform necessary action. P-2  
Video 1
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3. Inspect, remove, and replace front wheel drive (FWD) bearings, hubs, and seals. P-1
(P-2)
Video 1
4. Inspect, service, and replace shafts, yokes, boots, and universal/CV joints. P-1
(P-2)
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5. Check shaft balance and phasing; measure shaft runout; measure and adjust driveline angles. P-2  
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E. Drive Axle Diagnosis and Repair
E.1 Ring and Pinion Gears and Differential Case Assembly
  Task Priority MLR AST MAST Animation Video
1. Clean and inspect differential housing; check for leaks; inspect housing vent. P-2  
Video 1
2. Check and adjust differential housing fluid level. P-1
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3. Drain and refill differential housing. P-1
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4. Diagnose noise and vibration concerns; determine necessary action. P-2    
Video 1
5. Iinspect and replace companion flange and pinion seal; measure companion flange runout. P-2  
Video 1
Video 2
6. Inspect ring gear and measure runout; determine necessary action. P-3    
Video 1
7. Remove, inspect, and reinstall drive pinion and ring gear, spacers, sleeves, and bearings. P-3    
Video 1
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8. Measure and adjust drive pinion depth. P-3      
Video 1
9. Measure and adjust drive pinion bearing preload. P-3      
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10. Measure and adjust side bearing preload and ring and pinion gear total backlash and backlash variation on a differential carrier assembly (threaded cup or shim types). P-3      
Video 1
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11. Check ring and pinion tooth contact patterns; perform necessary action. P-3      
Video 1
12. Disassemble, inspect, measure, and adjust or replace differential pinion gears (spiders), shaft, side gears, side bearings, thrust washers, and case. P-3      
Video 1
13. Reassemble and reinstall differential case assembly; measure runout; determine necessary action. P-3      
Video 1
E.1 Limited Slip Differential
  Task Priority MLR AST MAST Animation Video
1. Diagnose noise, slippage, and chatter concerns; determine necessary action. P-3      
Video 1
2. Measure rotating torque; determine necessary action. P-3      
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E.3 drive Axles
  Task Priority MLR AST MAST Animation Video
1. Inspect and replace drive axle wheel studs. P-1
(P-2)
 
Video 1
2. Remove and replace drive axle shafts. P-1    
Video 1
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3. Inspect and replace drive axle shaft seals, bearings, and retainers. P-2    
Video 1
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4. Measure drive axle flange runout and shaft end play; determine necessary action. P-3    
Video 1
5. Diagnose drive axle shafts, bearings, and seals for noise, vibration, and fluid leakage concerns; determine necessary action. P-4      
Video 1
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Video 4
F. Four-Wheel Drive/All-Wheel Drive Component Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Inspect, adjust, and repair shifting controls (mechanical, electrical, and vacuum), bushings, mounts, levers, and brackets. P-3    
Video 1
2. Inspect front-wheel bearings and lockings hubs; perform necessary actions(s). P-1  
Video 1
Video 2
3. Check for leads at drive assembly seals; check vents; check lube level. P-2
(P-2)
 
Video 1
4. Measure drive axle flange runout and shaft end play; determine necessary action. P-3      
5. Diagnose noise, vibration, and unusual steering concerns; determine necessary action. P-4      
Video 1
6. Diagnose, test, adjust, and replace electrical/electronic components of four-wheel drive systems P-4      
Video 1
Video 2
7. Disassemble, service, and reassemble transfer case and components. P-4      
Video 1
Video 2
Video 3
Video 4
Video 5

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MLR - Maintenance & Light Repair
AST - Auto Service Technology (Includes MLR)
MAST - Master Auto Service Technology (Includes MLR and AST)
 
A. General: Suspension and Steering Systems
  Task Priority MLR AST MAST Animation Video
1. Research applicable vehicle and service information, vehicle service history, service precautions, and technical service bulletins. P-1  
Video 1
2. Identify and interpret suspension and steering system concerns; determine necessary action. P-1    
Video 1
Video 2
Video 3
Video 4
B. Steering Systems Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Disable and enable supplemental restraint system (SRS). P-1  
Video 1
2. Remove and replace steering weel; center/time supplemental restraint system (SRS) coil (clock spring). P-1  
Animation 1
Video 1
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3. Diagnose steering column noises, looseness, and binding concerns (including tilt mechanisms); determine necessary action. P-2  
Video 1
4. Diagnose power steering gear (non-rack and pinion) binding, uneven turning effort, looseness, hard steering, and noise concerns; determine necessary action. P-2  
Video 1
Video 2
5. Diagnose power steering gear (rack and pinion) binding, uneven turning effort, looseness, hard steering, and noise concerns; determine necessary action. P-2  
Video 1
6. Inspect steering shaft universal-joint(s), flexible coupling(s), collapsible column, lock cylinder mechanism, and steering wheel; perform necessary action. P-2  
Video 1
Video 2
Video 3
7. Remove and replace rack and pinion steering gear; inspect mounting bushings and brackets. P-2  
Animation 1
Video 1
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Video 13
8. Inspect rack and pinion steering gear inner tie rod ends (sockets) and bellows boots; replace as needed. P-2


Inspect only
(P-2)

Video 1
Video 2
Video 3
Video 4
9. Determine proper power steering fluid type; inspect fluid level and condition. P-1
Animation 1
Animation 2
Video 1
10. Flush, fill, and bleed power steering system. P-2
Animation 1
Animation 2
Video 1
Video 2
Video 3
11. Inspect for power steering fluid leakage; determine necessary action. P-1  
Video 1
Video 2
12. Remove, inspect, replace, and adjust power steering pump drive belt. P-1
Animation 1
 
13. Remove and reinstall power steering pump. P-2
Video 1
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Video 5
14. Remove and rinstall press fit power steering pump pulley; check pulley and belt alignment. P-2
Check/
adjust PS belt
(P-2)
Animation 1
Video 1
Video 2
Video 3
15. Inspect and replace power steering hoses and fittings. P-2
Video 1
Video 2
16. Flush, fill, and bleed power steering system. P-2
(P-1)
Video 1
Video 2
Video 3
17. Inspect, replace, and adjust tie rod ends (sockets), tie rod sleeves, and clamps. P-1
Animation 1
Video 1
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Video 5
18. Test and diagnose components of electronically-controlled steering systems using a scan tool; determine necessary action. P-3
Inspect
electric
power
steering
only
Animation 1
Video 1
Video 2
Video 3
19. Identify hybrid vehicle power steering system electrical circuits and safety precautions. P-2
Video 1
20. Inspect electric power-assisted steering. P-3    
Video 1
C. Suspension Systems Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose short and long arm suspension system noises, body sway, and uneven ride height concerns; determine necessary action. P-1    
Video 1
2. Diagnose strut suspension system noises, body sway, and uneven ride height concerns; determine necessary action. P-1  
Video 1
Video 2
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Video 7
3. Inspect, remove, and install upper and lower control arms, bushings, shafts, and rebound bumpers. P-3
Inspect
and
replace
rebound
and
jounce
bumper
only
(P-1)
Animation 1
Animation 2
Video 1
Video 2
Video 3
Video 4
Video 5
4. Inspect, remove, and install strut rods and bushings. P-3
Video 1
Video 2
5. Inspect, remove, and install upper and/or lower ball joints (with or without wear indicators). P-2
Inspect
only
(P-1)
Animation 1
Video 1
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Video 5
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Video 9
Video 10
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Video 12
Video 13
Video 14
6. Inspect, remove, and install steering knuckle assemblies. P-3  
Video 1
7. Inspect, remove, and install short and long arm suspension system coil springs and spring insulators. P-3
Inspect
only
(P-1)
Animation 1
Animation 2
Video 1
Video 2
Video 3
8. Inspect, remove, and install torsion bars and mounts. P-3
Inspect
only
(P-1)
Video 1
9. Inspect, remove, and install front stabilizer bar (sway bar) bushings, brackets, and links. P-3
Inspect
only
(P-1)
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
10. Inspect, remove, and install strut cartridge or assembly, strut coil spring, insulators (silencers), and upper strut bearing mount. P-3
Inspect
only
(P-1)
Animation 1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
Video 14
Video 15
Video 16
Video 17
Video 18
Video 19
Video 20
Video 21
Video 22
Video 23
Video 24
Video 25
11. Inspect, remove, and install track bar, strut rods/radius arms, and related mounts and bushings. P-3
Inspect
only
(P-1)
Animation 1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
12. Inspect rear suspension system leaf spring(s), bushings, center pins/bolts, and mounts. P-1  
Video 1
Video 2
Video 3
D. Related Suspension and Steering Service
  Task Priority MLR AST MAST Animation Video
1. Inspect, remove, and replace shock absorbers; inspect mounts and bushings. P-1    
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
2. Remove, inspect, and service or replace front and rear wheel bearings. P-1
Animation 1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
Video 14
Video 15
Video 16
3. Describe the function of the power steering pressure switch. P-3
Video 1
E. Wheel Alignment Diagnosis, Adjustment, and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose vehicle wander, drift, pull, hard steering, bnump steer, memory steer, torque steer, and steering return concerns; determine necessary action. P-1  
Video 1
Video 2
2. Perform pre-alignment inspection and measure vehicle ride height; perform necessary action. P-1
Animation 1
Video 1
Video 2
3. Prepare vehicle for wheel alignment on alignment machine; perform four-wheel alignment by checking and adjusting front and rear wheel caster, camber; and toe as required; center steering wheel. P-1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
4. Check toe-out-on-turns (turning radius); determine nbecessary action. P-2  
Video 1
5. Check SAI (steering axis inclination) and included angle; determine necessary action. P-2  
Video 1
6. Check rear wheel thrust angle; determine necessary action. P-1  
Video 1
7. Check for front wheel setback; determine necessary action. P-2  
Video 1
8. Check front and/or rear cradle (subframe) alignment; determine necessary action. P-3    
Video 1
9. Reset steering angle sensor. P-2    
Video 1
F. Wheels and Tires Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Inspect, adjust, and repair shifting controls (mechanical, electrical, and vacuum), bushings, mounts, levers, and brackets. P-1    
Video 1
Video 2
Video 3
2. Inspect front-wheel bearings and lockings hubs; perform necessary actions(s). P-2    
Video 1
Video 2
3. Check for leads at drive assembly seals; check vents; check lube level. P-1  
Video 1
4. Measure drive axle flange runout and shaft end play; determine necessary action. P-2  
Animation 1
Video 1
5. Diagnose noise, vibration, and unusual steering concerns; determine necessary action. P-2    
Video 1
6. Dismount, inspect, and remount tire on wheel; balance wheel and tire assembly (static and dynamic). P-1  
Video 1
Video 2
Video 3
Video 4
Video 5
7. Dismount, inspect, and remount tire on wheel equipped with tire pressure monitoring system sensor. P-2  
Video 1
8. Inspect tire and wheel assembly for air loss; perform necessary action. P-1  
Video 1
9. Repair tire using internal patch. P-1  
Video 1
Video 2
10. Identify and test tire pressure monitoring system (indirect and direct) for operation; calibrate system; verify operation of instrument panel lamps. P-2  
Video 1
11. Demonstrate knowledge of steps required to remove and replace sensors in a tire pressure monitoring system. P-1


(P-2)

 
Video 1
Video 2
Video 3

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MLR - Maintenance & Light Repair
AST - Auto Service Technology (Includes MLR)
MAST - Master Auto Service Technology (Includes MLR and AST)
 
A. General: Brake System Diagnosis
  Task Priority MLR AST MAST Animation Video
1. Identify and interpret brake system concerns; determine necessary action. P-1    
Video 1
Video 2
2. Research applicable vehicle and service information, vehicle service history, service precautions, and technical service bulletins P-1
Video 1
3. Describe procedure for performing a road test to check brake system operation; including an anti-lock brake system (ABS). P-1
Video 1
4. Install wheel and torque lug nuts. P-1
Video 1
B. Hydraulic System Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose pressure concerns in the brake system using hydraulic principles (Pascal’s Law). P-1  
Animation 1
Video 1
2. Measure brake pedal height, travel, and free play (as applicable); determine necessary action. P-1
Video 1
Video 2
3. Check master cylinder for internal/external leaks and proper operation; determine necessary action. P-1
Animation 1
Video 1
4. Remove, bench bleed, and reinstall master cylinder. P-1  
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
5. Diagnose poor stopping, pulling or dragging concerns caused by malfunctions in the hydraulic system; determine necessary action. P-3  
Video 1
6. Inspect brake lines, flexible hoses, and fittings for leaks, dents, kinks, rust, cracks, bulging, and wear; check for loose fittings and supports; determine necessary action. P-1  
Video 1
Video 2
Video 3
7. Replace brake lines, hoses, fittings, and supports. P-2  
Animation 1
Video 1
Video 2
Video 3
8. Fabricate brake lines using proper material and flaring procedures (double flare and ISO types). P-2  
Video 1
Video 2
Video 3
Video 4
9. Select, handle, store, and fill brake fluids to proper level. P-1
Video 1
10. Inspect, test, and/or replace components of brake warning light system. P-3
Video 1
11. Identify components of brake warning light system. P-2
(P-3
)
Video 1
12. Bleed and/or flush brake system. P-1  
Video 1
Video 2
Video 3
Video 4
13. Test brake fluid for contamination. P-1
Video 1
C. Drum Brake Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose poor stopping noise, vibration, pulling, grabbing, dragging or pedal pulsation concerns; determine necessary action. P-1  
Video 1
Video 2
2. Remove, clean, inspect, and measure brake drum diameter; determine necessary action. P-1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
Video 14
Video 15
Video 16
3. Refinish brake drum and measure final drum diameter; compare with specifications. P-1
Video 1
Video 2
Video 3
4. Remove, clean, and inspect brake shoes, springs, pins, clips, levers, adjusters/self-adjusters, other related brake hardware, and backing support plates; lubricate and reassemble. P-1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
Video 14
Video 15
Video 16
Video 17
Video 18
Video 19
Video 20
Video 21
Video 22
Video 23
5. Inspect wheel cylinders for leaks and proper operation; remove and replace as needed. P-2
Video 1
Video 2
Video 3
Video 4
6. Pre-adjust brake shoes and parking brake; install brake drums or drum/hub assemblies and wheel bearings; perform final checks and adjustments. P-2
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
Video 14
Video 15
Video 16
Video 17
Video 18
D. Disc Brake Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose poor stopping, noise, vibration, pulling, grabbing, dragging, or pulsation concerns; determine necessary action. P-1    
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
2. Remove and clean caliper assembly; inspect for leaks and damage/wear to caliper housing; determine necessary action. P-1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
Video 14
3. Clean and inspect caliper mounting and slides/pins for proper operation, wear, and damage; determine necessary action. P-1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
Video 14
Video 15
Video 16
Video 17
Video 18
Video 19
Video 20
Video 21
4. Remove, inspect, and replace pads and retaining hardware; determine necessary action. P-1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
Video 14
Video 15
Video 16
Video 17
Video 18
Video 19
Video 20
Video 21
Video 22
Video 23
Video 24
Video 25
Video 26
Video 27
Video 28
Video 29
5. Lubricate and reinstall caliper, pads, and related hardware; seat pads and inspect for leaks. P-1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
Video 14
Video 15
Video 16
Video 17
Video 18
Video 19
Video 20
Video 21
Video 22
6. Clean and inspect rotor; measure rotor thickness, thickness variation, and lateral runout; determine necessary action. P-1
Animation 1
Animation 2
Animation 3
Animation 4
Video 1
7. Remove and reinstall rotor. P-1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
Video 14
Video 15
Video 16
Video 17
8. Refinish rotor on vehicle; measure final rotor thickness and compare with specification. P-1
Video 1
Video 2
Video 3
Video 4
9. Refinish rotor off vehicle; measure final rotor thickness and compare with specifications. P-1
Video 1
Video 2
10. Retract and re-adjust caliper piston on an integrated parking brake system. P-3
Video 1
Video 2
Video 3
11. Check brake pad wear indicator; determine necessary action. P-2
Animation 1
Video 1
12. Describe importance of operating vehicle to burnish/break-in replacement brake pads according to manufacturer's recommendations. P-1
Video 1
E. Power-Assist Units Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Check brake pedal travel with, and without, engine running to verify proper power booster operation. P-2  
Video 1
2. Check vacuum supply (manifold or auxiliary pump) to vacuum-type power booster. P-1
Video 1
3. Inspect vacuum-type power booster unit for leaks; inspect the check-valve for proper operation; determine necessary action. P-1  
Video 1
Video 2
Video 3
Video 4
Video 5
4. Inspect and test hydraulically-assisted power brake system for leaks and proper operation; determine necessary action. P-3
Video 1
Video 2
5. Measure and adjust master cylinder pushrod length. P-3
Video 1
F. Miscellaneous (Wheel Bearings, Parking Brakes, Electrical, ETC.) Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose wheel bearing noises, wheel shimmy, and vibration concerns; determine necessary action. P-3    
Video 1
Video 2
2. Remove, clean, inspect, repack, and install wheel bearings; replace seals; install hub and adjust bearings. P-1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
3. Check parking brake cables and components for wear, binding, and corrosion; clean, lubricate, adjust or replace as needed. P-2
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
4. Check parking brake operation and parking brake indicator light system operation; determine necessary action. P-1
Video 1
Video 2
Video 3
Video 4
5. Check operation of brake stop light system. P-1
Video 1
6. Replace wheel bearing and race. P-2
Video 1
7. Remove and reinstall sealed wheel bearing assembly. P-2  
Video 1
8. Inspect and replace wheel studs. P-1
Video 1
G. Electronic Brake, Traction and Stability Control Systems Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Identify and inspect electronic brake control system components; determine necessary action. P-3
Animation 1
Animation 2
Animation 3
Video 1
2. Identify traction control/vehicle stability control system components. P-3  
Animation 1
Video 1
3. Describe the operation of a regenerative braking system. P-3
Video 1
Video 2
4. Diagnose poor stopping, wheel lock-up, abnormal pedal feel, unwanted application, and noise concerns associated with the electronic brake control system; determine necessary action. P-2    
Video 1
5. Diagnose electronic brake control system electronic control(s) and components by regtrieving diagnostic trouble codes, and/or using recommended test equipment; determine necessary action. P-2    
Video 1
Video 2
Video 3
Video 4
6. Depressurize high-pressure components of an electronic brake control system. P-3     N/A
7. Bleed the electronic brake control system hydraulic circuits. P-1    
Video 1
8. Test, diagnose, and service electronic brake control system speed sensors (digital and analog), toothed ring (tone wheel), and circuits using a graphing multimeter (GMM)/digital storage oscilloscope (DSO) (includes output signal, resistance, shorts to voltage/ground, and frequency data). P-3    
Animation 1
Animation 2
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
Video 14
Video 15
9. Diagnose electronic brake control system braking concerns caused by vehicle modifications (tire size, curb height, final drive ratio, etc.). P-3     N/A

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MLR - Maintenance & Light Repair
AST - Auto Service Technology (Includes MLR)
MAST - Master Auto Service Technology (Includes MLR and AST)
 
A. General: Electrical Systems Diagnosis
  Task Priority MLR AST MAST Animation Video
1. Identify and interpret drive train concerns; determine necessary action. P-1  
Video 1
2. Demonstrate knowledge of electrical/electronic series, parallel, and series-parallel circuits using principles of electricity (Ohm’s Law). P-1
Video 1
Video 2
Video 3
Video 4
3. Demonstrate proper use of a digital multimeter (DMM) when measuring source voltage, voltage drop (including grounds), current flow and resistance. P-1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
4. Demonstrate knowledge of the causes and effects from shorts, grounds, opens, and resistance problems in electrical/electronic circuits. P-1
Video 1
Video 2
Video 3
5. Check operation of electrical circuits with a test light. P-1 (P-2)
Video 1
Video 2
6. Check operation of electrical circuits with fused jumper wires. P-1 (P-2)
Video 1
7. Use wiring diagrams during the diagnosis (troubleshooting) of electrical/electronic circuit problems. P-1    
Video 1
Video 2
Video 3
Video 4
Video 5
8. Diagnose the cause(s) of excessive key-off battery drain (parasitic draw); determine necessary action. P-1
Video 1
Video 2
9. Inspect and test fusible links, circuit breakers, and fuses; determine necessary action. P-1
Video 1
Video 2
10. Inspect and test switches, connectors, relays, solenoid solid state devices, and wires of electrical/electronic circuits; determine necessary action. P-1  
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
11. Replace electrical connectors and terminal ends. P-1
Video 1
12. Repair wiring harness. P-1  
Video 1
Video 2
13. Perform solder repair of electrical wiring. P-1
Video 1
Video 2
Video 3
14. Check electrical/electronic circuit waveforms; interpret readings and determine needed repairs. P-2    
Video 1
15. Repair CAN/BUS wiring harness. P-1    
Video 1
B. Battery Diagnosis and Service
  Task Priority MLR AST MAST Animation Video
1. Perform battery state-of-charge test; determine necessary action. P-1    
Video 1
2. Confirm proper battery capacity for vehicle application; perform battery capacity test; determine necessary action. P-1  
Video 1
Video 2
3. Maintain or restore electronic memory functions. P-1  
Video 1
4. Inspect and clean battery; fill battery cells; check battery cables, connectors, clamps, and hold-downs. P-1  
Video 1
Video 2
Video 3
5. Perform slow/fast battery charge according to manufacturer’s recommendations. P-1
Video 1
6. Jump-start vehicle using jumper cables and a booster battery or an auxiliary power supply. P-1  
Video 1
Video 2
7. Identify high-voltage circuits of electric or hybrid electric vehicle and related safety precautions. P-3  
Video 1
8. Identify electronic modules, security systems, radios, and other accessories that require reinitialization or code entry after reconnecting vehicle battery. P-1  
Video 1
9. Identify hybrid vehicle auxiliary (12v) battery service, repair, and test procedures. P-3  
Video 1
C. Starting System Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Perform starter current draw tests; determine necessary action. P-1  
Video 1
2. Perform starter circuit voltage drop tests; determine necessary action. P-1
Video 1
Video 2
Video 3
Video 4
Video 5
3. Inspect and test starter relays and solenoids; determine necessary action. P-2
Video 1
Video 2
4. Remove and install starter in a vehicle. P1
Video 1
Video 2
Video 3
Video 4
5. Inspect and test switches, connectors, and wires of starter control circuits; determine necessary action. P-2
Video 1
Video 2
6. Differentiate between electrical and engine mechanical problems that cause a slow-crank or a no-crank condition. P-2  
Video 1
Video 2
D. Charging System Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Perform charging system output test; determine necessary action. P-1  
Video 1
Video 2
Video 3
2. Diagnose (troubleshoot) charging system for causes of undercharge, no-charge, or overcharge conditions. P-1  
Video 1
Video 2
3. Inspect, adjust, or replace generator (alternator) drive belts; check pulleys and tensioners for wear; check pulley and belt alignment. P-1
Animation 1
Video 1
Video 2
Video 3
4. Remove, inspect, and re-install generator (alternator). P1 (P-2)
Video 1
Video 2
Video 3
Video 4
5. Perform charging circuit voltage drop tests; determine necessary action. P-1
Video 1
E. Lighting Systems Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose (troubleshoot) the causes of brighter-than-normal, intermittent, dim, or no light operation; determine necessary action P-1  
Video 1
Video 2
2. Inspect interior and exterior lamps and sockets including headlights and auxiliary lights (fog lights/driving lights); replace as needed. P-1  
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
3. Aim Headlights. P-2
Video 1
Video 2
4. Identify system voltage and safety precautions associated with high-intensity discharge headlights. P-2
Video 1
F. Gauges, Warning Devices, and Driver Information Systems Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Inspect and test gauges and gauge sending units for causes of abnormal gauge readings; determine necessary action P-2    
Video 1
Video 2
Video 3
Video 4
2. Diagnose (troubleshoot) the causes of incorrect operation of warning devices and other driver information systems; determine necessary action P-2    
Video 1
Video 2
G. Gauges, Warning Devices, and Driver Information Systems Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Inspect, adjust, and repair shifting controls (mechanical, electrical, and vacuum), bushings, mounts, levers, and brackets. P-1    
Video 1
2. Diagnose (troubleshoot) causes of incorrect wiper operation; diagnose wiper speed control and park problems; perform necessary action P-2    
Video 1
Video 2
Video 3
3. Diagnose (troubleshoot) windshield washer problems; perform necessary action P-2    
Video 1
Video 2
H. Accessories Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose (troubleshoot) incorrect operation of motor-driven accessory circuits; determine necessary action P-2  
Animation 1
Animation 2
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
2. Diagnose (troubleshoot) incorrect electric lock operation (including remote keyless entry); determine necessary action. P-2    
Video 1
Video 2
3. Diagnose (troubleshoot) incorrect operation of cruise control systems; determine necessary action. P-3    
Video 1
4. Diagnose (troubleshoot) supplemental restraint system (SRS) problems; determine necessary action. P-2    
Video 1
5. Disable and enable an airbag system for vehicle service; verify indicator lamp operation. P-1  
Video 1
6. Remove and reinstall door panel. P-1  
Video 1
7. Check for module communication errors (including CAN/BUS systems) using a scan tool. P-2    
Video 1
8. Describe the operation of keyless entry/remote-start systems. P-3  
Video 1
9. Verify operation of instrument panel gauges and warning/indicator lights; reset maintenance indicators. P-1  
Video 1
10. Verify windshield wiper and washer operation, replace wiper blades. P-1  
Video 1
Video 2
11. Diagnose (troubleshoot) radio static and weak, intermittent, or no radio reception; determine necessary action. P-3      
Video 1
Video 2
12. Diagnose (troubleshoot) body electronic system circuits using a scan tool; determine necessary action. P-3       N/A

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MLR - Maintenance & Light Repair
AST - Auto Service Technology (Includes MLR)
MAST - Master Auto Service Technology (Includes MLR and AST)

A. General: A/C System Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Identify and interpret heating and air conditioning problems; determine necessary action. P-1  
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
2. Research applicable vehicle and service information, vehicle service history, service precautions, and technical service bulletins. P-1
Video 1
Video 2
Video 3
3. Performance test A/C system; identify problems. P-1  
Animation 1
Video 1
Video 2
Video 3
4. Identify abnormal operating noises in the A/C system; determine necessary action. P-1  
Video 1
5. Identify refrigerant type; select and connect proper gauge set; record temperature and pressure readings. P-1  
Animation 1
Animation 2
Animation 3
Video 1
6. Leak test A/C system; determine necessary action. P-1  
Animation 1
Animation 2
Animation 3
Video 1
Video 2
Video 3
Video 4
Video 5
7. Diagnose noise and vibration concerns; determine necessary action. P-2     N/A
8. Deterine recommended oil and oil capacity for system application. P-1  
Video 1
9. Using a scan tool, observe and recore related HVAC data and trouble codes. P-3  
Animation 1
Video 1
B. Refrigeration System Component Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Inspect and replace A/C compressor drive belts, pulleys, and tensioners; determine necessary action. P-1
Animation 1
Video 1
2. Inspect, test, service or replace A/C compressor clutch components and/or assembly; check compressor clutch air gap; adjust as needed. P-2  
Animation 1
Video 1
Video 2
Video 3
3. Remove, inspect, and reinstall A/C compressor and mountings; determine recommended oil quantity. P-2  
Video 1
Video 2
Video 3
Video 4
Video 5
4. Identify hybrid vehicle A/C system electrical circuits and service/safety precautions. P-2
Video 1
5. Determine need for an additional A/C system filter; perform necessary action. P-3  
Animation 1
Animation 2
Video 1
6. Remove and inspect A/C system mufflers, hoses, lines, fittings, O-rings, seals, and service valves; perform necessary action. P-2  
Video 1
Video 2
7. Determine need for an additional A/C system filter; perform necessary action. P-1
Video 1
8. Remove, inspect, and reinstall receiver/drier or accumulator/drier; determine recommended oil quantity. P-2  
Video 1
Video 2
Video 3
9. Remove, inspect, and install expansion valve or orifice (expansion) tube. P-1  
Video 1
Video 2
Video 3
Video 4
10. Inspect evaporator housing water drain; perform necesary action. P-1  
Video 1
11. Diagnose A/C system conditions that cause the protectin devices (pressure, thermal, and PCM) to interrupt system operation; determine necessary action. P-2    
Video 1
Video 2
Video 3
12. Determine procedure to remove and reinstall evaporator; determine required oil quantity. P-2    
Video 1
13. Remove, inspect, and reinstall condenser; deterine required oil quantity. P-2    
Animation 1
Animation 2
Animation 3
Animation 4
Animation 5
Animation 6
Animation 7
Video 1
Video 2
Video 3
C. Heating, Ventilation, and Engine Cooling Systems Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Inspet engine cooling and heater systems hoses; perform necessary action. P-1
Video 1
Video 2
Video 3
Video 4
2. Inspect and test heater control valve(s); perform necessary action. P-2  
Video 1
Video 2
Video 3
3. Diagnose temperature control problems in the heater/ventilation system; determine PCM) to interrupt system operation' determine necessary action. P-2  
Video 1
Video 2
Video 3
4. Determine procedure to remove, inspect, and reinstall heater core. P-3  
Animation 1
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
D. Operating Systems and Related Controls Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Inspect and test A/C-heater blower motors, resistors, switches, relays, wiring, and protection devices; perform necessary action. P-1  
Animation 1
Animation 2
Animation 3
Video 1
Video 2
Video 3
Video 4
Video 5
Video 6
Video 7
Video 8
Video 9
Video 10
Video 11
Video 12
Video 13
2. Diagnose A/C compressor clutch control systems; determine necessary action. P-2    
Animation 1
Animation 2
Video 1
Video 2
3. Diagnose malfunctions in the vacuum, mechanical, and electrical components and controls of the heating, ventilation, and A/C (HVAC) system; determine necessary action. P-2      
Video 1
Video 2
Video 3
Video 4
Video 5
4. Inspect and test A/C-heater control panel assembly; determine necessary action. P-3      
Video 1
Video 2
Video 3
Video 4
Video 5
5. Inspect and test A/C-heater control cables, motors, and linkages; perform necessary action. P-3      
Video 1
Video 2
Video 3
Video 4
Video 5
6. Inspect A/C-heater ducts, doors, hoses, cabin filters, and outlets; perform necessary action. P-1  
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7. Identify the source of A/C system odors. P-2  
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8. Check operation of automatic or semi-automatic heating, ventilation, and air-conditioning (HVAC) control systems; determine necessary action. P-2      
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E. Refrigerant Recovery, Recycling, and Handling
  Task Priority MLR AST MAST Animation Video
1. Perform correct use and maintenance of refrigerant handling equipment according to equipment manufacturer’s standards. P-1  
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2. Identify and recover A/C system refrigerant. P-1  
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3. Recycle, label, and store refrigerant. P-1    
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4. Evacuate and charge A/C system; add refrigerant oil as required. P-1  
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MLR - Maintenance & Light Repair
AST - Auto Service Technology (Includes MLR)
MAST - Master Auto Service Technology (Includes MLR and AST)

A. General: Engine Diagnosis
  Task Priority MLR AST MAST Animation Video
1. Identify and interpret engine performance concerns; determine necessary action. P-1    
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2. Research applicable vehicle and service information, vehicle service history, service precautions, and technical service bulletins. P-1
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3. Diagnose abnormal engine noises or vibration concerns; determine necessary action. P-3  
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4. Diagnose the cause of excessive oil consumption, coolant consumption, unusual exhaust color, odor, and sound; determine necessary action. P-2  
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5. Perform engine absolute (vacuum/boost) manifold pressure tests; determine necessary action. P-1
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6. Perform cylinder power balance test; determine necessary action. P-1
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7. Perform cylinder cranking and running compression tests; determine necessary action. P-1  
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8. Perform cylinder leakage test; determine necessary action. P-1
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9. Diagnose engine mechanical, electrical, electronic, fuel, and ignition concerns; determine necessary action P-2  
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10. Verify engine operating temperature; determine necessary action. P-1
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11. Verify correct camshaft timing. P-1  
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B. Computerized Controls Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Retrieve and record diagnostic trouble codes, OBD monitor status, and freeze frame data; clear codes when applicable. P-1
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2. Access and use service information to perform step-by-step (troubleshooting) diagnosis. P-2    
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3. Perform active tests of actuators using a scan tool; determine necessary action. P-2  
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4. Describe the importance of running all OBDII monitors for repair verification P-1
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5. Diagnose the causes of emissions or drivability concerns with stored or active diagnostic trouble codes; obtain, graph, and interpret scan tool data. P-1  
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6. Diagnose emissions or drivability concerns without stored diagnostic trouble codes; determine necessary action. P-1    
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7. Inspect and test computerized engine control system sensors, powertrain/engine control module (PCM/ECM), actuators, and circuits using a graphing multimeter (GMM)/digital storage oscilloscope (DSO); perform necessary action. P-1
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8. Diagnose driveability and emissions problems resulting from malfunctions of interrelated systems (cruise control, security alarms, suspension controls, traction controls, A/C, automatic transmissions, non-OEM installed accessories, or similar systems); determine necessary action. P-3    
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C. Ignition Systems Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose (troubleshoot) ignition system related problems such as no-starting, hard starting, engine misfire, poor drivability, spark knock, power loss, poor mileage, and emissions concerns; determine necessary action. P-2  
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2. Inspect and test crankshaft and camshaft position sensor(s); perform necessary action. P-1  
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3. Inspect, test, and/or replace ignition control module, powertrain/engine control module; reprogram as necessary. P-3  
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4. Remove and replace spark plugs; inspect secondary ignition components for wear and damage. P-1  
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D. Fuel, Air Induction, and Exhaust Systems Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose (troubleshoot) hot or cold no-starting, hard starting, poor drivability, incorrect idle speed, poor idle, flooding, hesitation, surging, engine misfire, power loss, stalling, poor mileage, dieseling, and emissions problems; determine necessary action. P-2    
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2. Check fuel for contaminants; determine necessary action. P-2    
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3. Inspect and test fuel pumps and pump control systems for pressure, regulation, and volume; perform necessary action. P-1  
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4. Replace fuel filter(s). P-1
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5. Inspect, service, or replace air filters, filter housings, and intake duct work. P-1  
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6. Inspect throttle body, air induction system, intake manifold and gaskets for vacuum leaks and/or unmetered air. P-2  
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7. Inspect and test fuel injectors. P-2  
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8. Verify idle control operation. P-1    
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9. Inspect integrity of the exhaust manifold, exhaust pipes, muffler(s), catalytic converter(s), resonator(s), tail pipe(s), and heat shields; perform necessary action. P-1  
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10. Inspect condition of exhaust system hangers, brackets, clamps, and heat shields; repair or replace as needed. P-1
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11. Perform exhaust system back-pressure test; determine necessary action. P-2    
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12. Check and refill diesel exhaust fluid (DEF). P-3  
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13. Test the operation of turbocharger/supercharger systems; determine necessary action. P-3      
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E. Emissions Control Systems Diagnosis and Repair
  Task Priority MLR AST MAST Animation Video
1. Diagnose oil leaks, emissions, and drivability concerns caused by the positive crankcase ventilation (PCV) system; determine necessary action. P-3    
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2. Inspect, test, and service positive crankcase ventilation (PCV) filter/breather cap, valve, tubes, orifices, and hoses; perform necessary action. P-2
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3. Diagnose emissions and drivability concerns caused by the exhaust gas recirculation (EGR) system; determine necessary action. P-3    
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4. Diagnose emissions and drivability concerns caused by the secondary air injection and catalytic converter systems; determine necessary action. P-2    
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5. Diagnose emissions and drivability concerns caused by the evaporative emissions control system; determine necessary action. P-2    
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6. Inspect A/C-heater ducts, doors, hoses, cabin filters, and outlets; perform necessary action. P-2      
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7. Inspect, test, service, and replace components of the EGR system including tubing, exhaust passages, vacuum/pressure controls, filters, and hoses; perform necessary action P-2  
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8. Inspect and test electrical/electronically-operated components and circuits of air injection systems; perform necessary action. P-3  
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9. Inspect and test catalytic converter efficiency. P-2  
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10. Inspect and test components and hoses of the evaporative emissions control system; perform necessary action. P-1    
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11. Interpret diagnostic trouble codes (DTCs) and scan tool data related to the emissions control systems; determine necessary action. P-1    
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