Main Power Supply and Ground Circuit

MAIN POWER SUPPLY AND GROUND CIRCUIT


Description

Supply power to TCM.




MAIN POWER SUPPLY AND GROUND CIRCUIT


Diagnosis Procedure

1.CHECK TCM POWER SOURCE
1. Turn ignition switch OFF.
2. Disconnect A/T assembly harness connector.
3. Turn ignition switch ON.
4. Check voltage between A/T assembly vehicle side harness connector terminals.





Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 2.
2.CHECK TCM GROUND CIRCUIT
Check continuity between A/T assembly vehicle side harness connector terminals and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair or replace damaged parts.
3.CHECK TCM POWER SOURCE CIRCUIT
Check voltage between A/T assembly vehicle side harness connector terminals and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Check the following. If NG, repair or replace damaged parts.
- Harness for short or open between battery and A/T assembly vehicle side harness connector terminal 2.
- Harness for short or open between push-button ignition switch and A/T assembly vehicle side harness connector terminals 1 and 6.
- 10A fuse (No. 36, located in the fuse, fusible link and relay box)
- 10A fuse (No. 43, located in the IPDM E/R)
- Push-button ignition switch. Refer to Ignition Power Supply.
4.DETECT MALFUNCTIONING ITEM
Check the following.
- Check terminals of A/T assembly connector for damage.
- Check connector for loose connection.
Is the inspection result normal?
YES - INSPECTION END
NO - Repair or replace damaged parts.