O/D Off Indicator Lamp Does Not Come On

1. O/D OFF Indicator Lamp Does Not Come On

SYMPTOM: O/D OFF indicator lamp does not come on for about 2 seconds when turning ignition switch to ON.

1. CHECK TCM POWER SOURCE
1. Turn ignition switch to ON position. (Do not start engine.)





2. Check voltage between TCM terminals 10, 19, 28 and ground.
OK or NG
OK >>GO TO 2.
NG >> GO TO 3.

2. CHECK POWER SOURCE STEP 2
1. Turn ignition switch to OFF position.





2. Check voltage between TCM terminal 28 and ground.
OK or NG
OK >>GO TO 4.
NG >> GO TO 3.

3. DETECT MALFUNCTIONING ITEM
Check the following items:
- Harness for short or open between ignition switch and TCM (Main harness)
Refer to "Wiring Diagram-AT-MAIN". AT-RE4F03B
- Ignition switch and fuse Ignition Switch
OK or NG
OK >>GO TO 4.
NG >> Repair or replace damaged parts.

4. CHECK TCM GROUND CIRCUIT
1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.





3. Check continuity between TCM terminals 25, 48 and ground.
Continuity should exist.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.

5. CHECK LAMP CIRCUIT





1. Turn ignition switch to OFF position.
2. Check resistance between TCM terminals 10 and 13.
Resistance: 50 - 100 Ohms
3. Reinstall any part removed.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.

6. DETECT MALFUNCTIONING ITEM
Check the following items:
- Harness and fuse for short or open between ignition switch and O/D OFF indicator lamp (Main harness)
- Harness for short or open between O/D OFF indicator lamp and TCM.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.

7. CHECK SYMPTOM
Check again.
OK or NG
OK >> INSPECTION END
NG >> GO TO 8.

8. CHECK TCM INSPECTION
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.