Component Tests and General Diagnostics
GENERATOR INSPECTIONGenerator Warning Light
1. Verify that the battery is fully charged.
- Charge if necessary.
2. Verify that the drive belt deflection/tension is within the specification. (See DRIVE BELT INSPECTION.)
- Adjust if necessary.
3. Turn the ignition switch on and verify that the generator warning light comes on.
- If the warning light does not illuminate, inspect the harness from ignition switch to generator warning light and from generator warning light to 3U terminal of PCM. If the generator warning light and harnesses are normal, replace the PCM.
4. Confirm that the generator warning light goes off after starting the engine.
- If the generator warning light does not go off, inspect the on-board diagnostic system service code. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION.)
Generator
Voltage
1. Verify that the battery is fully charged.
- Charge if necessary.
2. Verify that the drive belt deflection/tension is within the specification. (See DRIVE BELT INSPECTION.)
- Adjust if necessary.
3. Turn off all electrical loads.
4. Turn the ignition switch to START and verify that the generator turns smoothly without any noise while the engine is running.
5. Measure the voltage at the terminals shown in the table.
- If not as specified, disassemble and inspect the generator.
- Headlights
- Blower motor
- Rear window defroster
Current
1. Verify that the battery is fully charged.
- Charge if necessary.
2. Verify that the drive belt deflection/tension is within the specification. (See DRIVE BELT INSPECTION.)
- Adjust if necessary.
3. Disconnect the negative battery cable.
4. Connect a circuit tester, capable of reading 120 A or over, between generator terminal B and the wiring harness.
5. Connect the negative battery cable.
6. Turn off all electrical loads.
7. Start the engine and increase the engine speed to 2,000 - 2,500 rpm.
8. Turn the following electrical loads on and verify that the current reading increases.
1. Headlights
2. Blower motor
3. Rear window defroster
- If generator terminal B current will not increase, disassemble and inspect the generator.
NOTE: Current required for generating power varies with electrical loads applied. Standard current (Reference)
Measuring conditions
Room temperature: 20 °C {68 °F}
Voltage: 13.5 V
Engine hot