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. Refer to "Exploded View" 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

Refer to "Intermittent Incident" Intermittent Incident.
Is the inspection result normal?
YES- Replace the control valve & TCM. Refer to "Removal and Installation" Removal and Installation.
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. Refer to "Wiring Diagram BATTERY POWER SUPPLY -" Battery Power Supply.
- Battery
- 10A fuse (No.36, located in the fuse, fusible link and relay box). Refer to "Fuse and Fusible Link Arrangement" Fuse, Fusible Link and Relay Box.
Is the inspection result normal?
YES- Replace the control valve & TCM. Refer to "Removal and Installation" Removal and Installation.
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. Refer to "Wiring Diagram BATTERY POWER SUPPLY -" Battery Power Supply.
- Ignition switch
- 10A fuse (No.43, located in the IPDM E/R). Refer to "Fuse, Connector and Terminal Arrangement" IPDM E/R.
- IPDM E/R
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Repair or replace damaged parts.