Inspection Procedure 26

CIRCUIT OPERATION
- The ECM or the 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 charging system.
- Short circuit in harness between generator G terminal and ECM.
- Short circuit in harness between generator G terminal and PCM.
- ECM failed.
- PCM failed.

WIRING DIAGRAM

CONNECTORS

DIAGNOSIS

STEP 1. Check voltage at PCM connector C-39 .
1. When the following conditions are satisfied, measure voltage between terminal number 33 or 8 , and ground. Do not disconnect the connector during this measurement.
a. Engine: Warm at idle
b. Radiator fan: stopped
c. Headlight switch: "OFF" "ON"
d. Rear defogger switch: "OFF" "ON"
e. Stoplight switch: "OFF" "ON"
- Voltage rises by 0.2 - 3.5 volts. If not within the specifications, go to Step 2.
If within the specifications, replace the generator. Then check that the malfunction is eliminated.

STEP 2. Check the harness wire between generator connector B46 and ECM connector C-46 or PCM connector C-39

NOTE: Check the wire after checking intermediate connector B-11. If intermediate connector B-11 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-46 and ECM connector C-36 or PCM connector C-39 is damaged, go to Step 3.
If the wire between generator connector B-46 and ECM connector C-36 or PCM connector C-39 is damaged, repair it. Then check that the malfunction is eliminated.

STEP 3. Check for damage of harness connector C-36 at the ECM or harness connector C-39 at the PCM and harness connector B-46 at the generator.
If harness connector C-36 or C-39 and B-46 are not damaged, replace the ECM or PCM.
If harness connector C-36 or C-39 and B-46 are damaged, repair or replace them. Refer to Harness Connector Inspection >.
Then check that the malfunction is eliminated.