CAN

TCM BRANCH LINE CIRCUIT

Diagnosis Procedure


1. CHECK CONNECTOR

1.Turn the ignition switch OFF.
2.Disconnect the battery cable from the negative terminal.
3.Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
- TCM
-Harness connector F2
-Harness connector E11
Is the inspection result normal?
YES- GO TO 2.
NO- Repair the terminal and connector.

2. CHECK HARNESS FOR OPEN CIRCUIT

1.Disconnect the connector of TCM.
2.Check the resistance between the TCM harness connector terminals.





Is the measurement value within the specification?
YES- GO TO 3.
NO- Repair the TCM branch line.

3. CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the TCM. Refer to the following.
- QR25DE: "Diagnosis Procedure" Main Power Supply And Ground Circuit
- VQ35DE: "Diagnosis Procedure" Main Power Supply And Ground Circuit
Is the inspection result normal?
YES (Present error)-Replace the TCM. Refer to the following.
- QR25DE: "Removal and Installation" Removal And Installation
- VQ35DE: "Removal and Installation" Removal And Installation
YES (Past error)-Error was detected in the TCM branch line.
NO- Repair the power supply and the ground circuit.