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.
Voltage : Battery voltage
3. Turn ignition switch to "OFF" position.
4. Check voltage between TCM terminal 28 and ground.
Voltage : Battery voltage
OK or NG
OK >> GO TO 2.
NG >> Check the following items:
^ Harness for short or open between ignition switch and TCM (Main harness). Refer to "Wiring Diagram-AT-MAIN".
^ Harness for short or open between battery and TCM (Main harness) Refer to "Wiring Diagram-AT-MAIN".
^ Ignition switch and fuse. Refer to "POWER SUPPLY ROUTING".

2. 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.
If OK, check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. Refer to "Wiring Diagram-AT-MAIN".

3. CHECK SELF-DIAGNOSIS RESULTS
With CONSULT-II
Does "SELECTION FORM MENU" in "DATA MONITOR" show damage to O/D OFF indicator lamp (SELF D DP LMP) signal circuit?
No Tools
Execute the self-diagnosis. Is a malfunction in the CAN communication indicated in the results?
YES or NO
YES >> Check the CAN communication line. Refer to "DTC U1000 CAN COMMUNICATION LINE".
NO >>GO TO 4.

4. CHECK O/D OFF INDICATOR LAMP CIRCUIT
1. Turn ignition switch to "OFF" position.
2. Check the combination meter.
OK or NG
OK >> GO TO 5.
NG >> Replace the combination meter.

5. CHECK SYMPTOM
Check again.
OK or NG
OK >>INSPECTION END
NG >>
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.