Main Power Supply And Ground Circuit

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 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. Disconnect the joint connector.
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 control valve & TCM. Exploded View.
NO - Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM (PART 1)
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). Fuse, Fusible Link And Relay Box, "Fuse and Fusible Link
Arrangement".
Is the inspection result normal?
YES - Replace control valve & TCM. Exploded View.
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 (PART 2)
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). Fuse, Connector And Terminal Arrangement.
- IPDM E/R
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Repair or replace damaged parts.