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 (PART 1)
1. Turn ignition switch OFF.
2. Disconnect A/T assembly connector.
3. Check voltage between A/T assembly vehicle side harness connector terminal and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - GO TO 4.
2.CHECK TCM POWER SOURCE (PART 2)
Check voltage between A/T assembly vehicle side harness connector terminals and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 5.
3.CHECK TCM GROUND CIRCUIT
Check continuity between A/T assembly vehicle side harness connector terminals and ground.





Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Repair or replace damaged parts.
4.DETECT MALFUNCTIONING ITEM
Check the following.
- Harness for short or open between battery positive terminal and A/T assembly vehicle side harness connector terminal 2. Battery Power Supply.
- Battery
- 10A fuse (No.36, located in the fuse, fusible link and relay box). Diagrams.
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Repair or replace damaged parts.
5.CHECK HARNESS BETWEEN IPDM E/R AND A/T ASSEMBLY (PART 1)
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R vehicle side harness connector terminal and A/T assembly vehicle side harness connector terminals.





Is the inspection result normal?
YES - GO TO 6.
NO - Repair or replace damaged parts.
6.CHECK HARNESS BETWEEN IPDM E/R AND A/T ASSEMBLY (PART 2)
Check continuity between A/T assembly vehicle side harness connector terminal and ground.





Is the inspection result normal?
YES - GO TO 7.
NO - Repair or replace damaged parts.
7.DETECT MALFUNCTIONING ITEM
Check the following.
- Harness for short or open between ignition switch and IPDM E/R. Battery Power Supply.
- Ignition switch
- 10A fuse (No.43, located in the IPDM E/R). Connector Views.
- IPDM E/R
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Repair or replace damaged parts.