Main Power Supply and Ground Circuit

DESCRIPTION
Supply power to TCM.

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 terminals 1, 2.
^ Harness for short or open between ignition switch and A/T assembly vehicle side harness connector terminal 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.

4.DETECT MALFUNCTIONING ITEM (STEP 1)
Check the following.
^ Check terminals of A/T assembly connector for damage.
^ Check connector for loose connection.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace damaged parts.

5.CHECK TERMINAL CORD ASSEMBLY
1. Remove control valve with TCM.
2. Disconnect TCM connector.
3. Check continuity between A/T assembly harness connector terminals and TCM connector terminals.





Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace damaged parts.

6.DETECT MALFUNCTIONING ITEM (STEP 2)
Check the following.
^ Check terminals of TCM connector and harness cladding for damage.
^ Check connector for loose connection.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair or replace damaged parts.