Inspection Procedure 26

Generator Circuit:

Connector:C-51 <M/T>, C-52 <A/T>:

CIRCUIT OPERATION
- The ECM or PCM controls generator output current by duty-controlling continuity between the generator G terminal (terminal 1) and ground.

TROUBLESHOOTING HINTS
The most likely causes for this code to be set are:
- Malfunction of the charging system.
- Short circuit in the harness generator G terminal and ECM .
- Short circuit in the harness generator G terminal and PCM.
- ECM failed.
- PCM failed.

DIAGNOSIS

STEP 1. Check the voltage at the ECM connector C-51 or PCM connector C-52 .
1. Measure the voltage between the terminal 8 and the ground under following condition. (Connectors should not be disconnected.)
a. Engine: Warm, idle
b. Radiator fan: Stopped
c. Headlight switch: OFF ON
d. Rear defogger switch: OFF ON
e. Stop light switch: OFF ON
- Voltage rises by 0.2 - 3.5 volts

If not within specifications, go to Step 2.

If within specifications, replace the generator. Then check that the malfunction is eliminated.

STEP 2. Check the harness wire between generator connector B-45 and ECM connector C-51 or PCM connector C-52 .

NOTE: Check the wire after checking intermediate connector B-13. If intermediate connector B-13 is damaged, repair or replace it. Refer to Harness Connector Inspection. Then check that the malfunction is eliminated.

If the wire between generator connector B-45 and ECM connector C-51 or PCM connector C-52 is not damaged, go to Step 3.

If the wire between generator connector B-45 and ECM connector C-51 or PCM connector C-52 is damaged, repair it. Then check the malfunction is eliminated.

STEP 3. Check for damage of harness connector C-51 at the ECM or harness connector C-52 at the PCM and harness connector B-45 at the generator.
If harness connector C-51 or C-52 and B-45 are not damaged, replace the ECM or PCM.

If harness connector C-51 or C-52 and B-45 are damaged, repair or replace them. Refer to Harness Connector Inspection.
Then check the malfunction is eliminated.