AUTO 156 - Electrical-Electronic Systems Level 2

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