(A6) Electrical/Electronic Systems
Animations by ASE Content Area. Includes Tasks and Priority levels.
A: General: Electrical System Diagnosis (click to expand)
Task 1: Research vehicle service information including vehicle service history, service precautions, and technical service bulletins.
Task 2: Demonstrate knowledge of electrical/electronic series, parallel, and series-parallel circuits using principles of electricity (Ohm’s Law).
Task 3: Demonstrate proper use of a digital multimeter (DMM) when measuring source voltage, voltage drop (including grounds), current flow and resistance.
Task 4: Demonstrate knowledge of the causes and effects from shorts, grounds, opens, and resistance problems in electrical/electronic circuits.
Task 5: Demonstrate proper use of a test light on an electrical circuit.
Task 6: Use fused jumper wires to check operation of electrical circuits.
Task 7: Use wiring diagrams during the diagnosis (troubleshooting) of electrical/electronic circuit problems.
Task 8: Diagnose the cause(s) of excessive key-off battery drain (parasitic draw); determine needed action.
Task 9: Inspect and test fusible links, circuit breakers, and fuses; determine needed action.
Task 10: Inspect, test, repair, and/or replace components, connectors, terminals, harnesses, and wiring in electrical/electronic systems (including solder repairs); determine needed action.
Task 11: Check electrical/electronic circuit waveforms; interpret readings and determine needed repairs.
Task 12: Repair data bus wiring harness.
B: Battery Diagnosis and Service (click to expand)
Task 1: Perform battery state-of-charge test; determine needed action.
Task 2: Confirm proper battery capacity for vehicle application; perform battery capacity and load test; determine needed action.
Task 3: Maintain or restore electronic memory functions.
Task 4: Inspect and clean battery; fill battery cells; check battery cables, connectors, clamps, and hold-downs.
Task 5: Perform slow/fast battery charge according to manufacturer’s recommendations.
Task 6: Jump-start vehicle using jumper cables and a booster battery or an auxiliary power supply.
Task 7: Identify safety recautions for high voltage systems on electric, hybrid-electric, and diesel vehicles.
Task 8: Identify electrical/electronic modules, security systems, radios, and other accessories that require reinitialization or code entry after reconnecting vehicle battery.
Task 9: Identify hybrid vehicle auxiliary (12v) battery service, repair, and test procedures.
C: Starting System Diagnosis and Repair (click to expand)
Task 1: Perform starter current draw tests; determine needed action.
Task 2: Perform starter circuit voltage drop tests; determine needed action.
Task 3: Inspect and test starter relays and solenoids; determine needed action.
Task 4: Remove and install starter in a vehicle.
Task 5: Inspect and test switches, connectors, and wires of starter control circuits; determine needed action.
Task 6: Differentiate between electrical and engine mechanical problems that cause a slow-crank or a no-crank condition.
Task 7: Demonstrate knowledge of an automatic idle-stop/start-stop system.
D: Charging System Diagnosis and Repair (click to expand)
Task 1: Perform charging system output test; determine needed action.
Task 2: Diagnose (troubleshoot) charging system for causes of undercharge, no-charge, or overcharge conditions.
Task 3: Inspect, adjust, and/or replace generator (alternator) drive belts; check pulleys and tensioners for wear; check pulley and belt alignment.
Task 4: Remove, inspect, and/or replace generator (alternator).
Task 5: Perform charging circuit voltage drop tests; determine needed action.
E: Lighting Systems Diagnosis and Repair (click to expand)
Task 1: Diagnose (troubleshoot) the causes of brighter-than-normal, intermittent, dim, or no light operation; determine needed action.
Task 2: Inspect interior and exterior lamps and sockets including headlights and auxiliary lights (fog lights/driving lights); replace as needed.
Task 3: Aim headlights.
Task 4: Identify system voltage and safety precautions associated with high-intensity discharge headlights.
F: Instrument Cluster and Driver Information Systems Diagnosis and Repair (click to expand)
Task 1: Inspect and test gauges and gauge sending units for causes of abnormal readings; determine needed action.
Task 2: Diagnose (troubleshoot) the causes of incorrect operation of warning devices and other driver information systems; determine needed action.
Task 3: Reset maintenance indicators as required.
G: Body Electrical Systems Diagnosis and Repair (click to expand)
Task 1: Diagnose operation of comfort and convenience accessories and related circuits (such as: power window, power seats, pedal height, power locks, truck locks, remote start, moon roof, sun roof, sun shade, remote keyless entry, voice activation, steering wheel controls, back-up camera, parking assist, cruise control, and auto dimming headlamps); determine needed repairs.
Task 2: Diagnose operation of security/anti-theft systems and related circuits (such as: theft deterrent, door locks, remote keyless entry, remote start, and starter/fuel disable); determine needed repairs.
Task 3: Diagnose operation of entertainment and related circuits (such as: radio, DVD, remote CD changer, navigation, amplifiers, speakers, antennas, and voice-activated accessories); determine needed repairs.
Task 4: Diagnose operation of safety systems and related circuits (such as: horn, airbags, seat belt pretensioners, occupancy classification, wipers, washers, speed control/collision avoidance, heads-up display, parking assist, and back-up camera); determine needed repairs.
Task 5: Diagnose body electronic systems circuits using a scan tool; check for module communication errors (data communication bus systems); determine needed action.
Task 6: Describe the process for software transfer, software updates, or reprogramming of electronic modules.