AUTO 156 - Electrical-Electronic Systems Level 2

1. Complete general Electrical Systems related Level 2 NATEF tasks as listed below.
   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 as listed below.
   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 as listed below.
   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 as listed below.
   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 as listed below.
   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 as listed below.