COMMENT ON TROUBLE SYMPTOM
- Failure is possibly caused by failed alternator, failed generation control circuit or other faults.
PROBABLE CAUSE
- Failed battery
- Alternator G terminal short-circuited
- Failed alternator
- Failed engine-A/T-ECU
)
Q: Is the check result normal?
YES:
Go to Step 3 
.NO: Repair.
- Disconnect connector, and measure at harness side.
- Ignition switch: ON
- Voltage between terminal No. 3 and earth.
OK: System voltage
Q: Is the check result normal?
YES:
Go to Step 5 .NO: Go to Step 4
.)
Q: Is the check result normal?
YES:
- Check intermediate connectors B-19, C-04, C-05, C-105, C-203 and C-205, and repair if necessary. If intermediate connectors are normal, check and repair harness between B-30 (terminal No. 3) alternator connector and C-303 (terminal No. 2) ignition switch connector.
- Check power supply line for open/short circuit.
)
Q: Is the check result normal?
YES:
Go to Step 6 .NO: Repair.
- Disconnect connector, and measure at harness side.
- Ignition switch: ON
- Voltage between terminal No. 45 and earth.
OK: System voltage
Q: Is the check result normal?
YES:
Go to Step 8 .NO: Go to Step 7
.
- Check output line for open/short circuit.
Q: Is the check result normal?
YES:
replace alternator.NO: Repair.
- Measure engine-A/T-ECU terminal voltage.
- Engine: Idling after warm-up
- Transmission: P range
- Radiator fan: Inactive
- Voltage between terminal No. 45 and earth.
OK: Switching the headlamps to ON from OFF causes the voltage to increase.
Q: Is the check result normal?
YES:
Go to Step 9 .NO:
- Replace alternator.