Main Power Supply And Ground Circuit

MAIN POWER SUPPLY AND GROUND CIRCUIT





Description
Supply power to TCM.




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 6.
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 7.
3.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 4.
NO - Repair or replace damaged parts.
4.CHECK JOINT CONNECTOR
1. Remove joint connector. Exploded View.
2. Check the continuity between joint connector terminals.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace damaged parts.
5.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
YES - Replace the control valve & TCM. Exploded View.
NO - Repair or replace damaged parts.
6.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). Type B.
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Repair or replace damaged parts.
7.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 8.
NO - Repair or replace damaged parts.
8.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 9.
NO - Repair or replace damaged parts.
9.DETECT MALFUNCTIONING ITEM
Check the following.
- Harness for short or open between ignition switch and IPDM E/R. Ignition Power Supply.
- Ignition switch
- 10A fuse (No.43, located in the IPDM E/R). Type B.
- IPDM E/R
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Repair or replace damaged parts.