Inspection Procedure 26

Generator Circuit Part 1:

Generator Circuit Part 2:

or PCM controls generator out put current by duty-controlling continuity between the generator G terminal (terminal 1) and ground.

TROUBLESHOOTING HINTS (The most likely causes for this charging system:)
- Malfunction of the charging system.
- Short circuit in the harness between generator G terminal and ECM or PCM .
- ECM or PCM failed.

DIAGNOSIS

STEP 1. Measure the voltage at generator intermediate connector B-14 by backprobing.

1. Do not disconnect the connector B-14.
2. Start the engine and run at idle.

3. Measure the voltage between terminal No. 4 and ground by backprobing.

NOTE: Vehicles for Canada, the headlight, taillight, etc. remain lit even when the lighting switch is in "OFF" position but this is no problem for checks.

a. Engine: warming up
b. Radiator fan: stopped
c. Headlight switch: OFF to ON
d. Rear defogger switch: OFF to ON
e. Stoplight switch: OFF to ON
- Voltage rises by 0.2 - 3.5 volts.

4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the measured voltage between 0.2 and 3.5 volts?

YES: Replace the generator. Then confirm that the malfunction symptom is eliminated.

NO: Go to Step 2.

STEP 2. Check harness connector B-14 at generator intermediate harness connector for damage.

Q: Is the harness connector in good condition?

YES: Go to Step 3.

NO: Repair or replace it. Refer to Harness Connector Inspection. Then confirm that the malfunction symptom is eliminated.

STEP 3. Check harness connector B-25 at generator connector for damage.

Q: Is the harness connector in good condition?

YES: Go to Step 4.

NO: Repair or replace it. Refer to Harness Connector Inspection. Then confirm that the malfunction symptom is eliminated.

STEP 4. Check harness connector C-119 at ECM or harness connector C-120 at PCM for damage.

Q: Is the harness connector in good condition?

YES: Go to Step 5.

NO: Repair or replace it. Refer to Harness Connector Inspection. Then confirm that the malfunction symptom is eliminated.

STEP 5. Check for open circuit and short circuit to ground and harness damage between generator connector B-25 (terminal No. 1) and ECM connector C-119 (terminal No. 33) or PCM connector C-120 (terminal No. 8) .

Q: Is the harness wire in good condition?

YES: Replace the ECM or PCM. Then confirm that the malfunction symptom is eliminated.

NO: Repair it. Then confirm that the malfunction symptom is eliminated.