Diagnosis Procedure 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 F1
-Harness connector E3
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.
-QR25DE models





-VQ35DE models





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 models: CVT Control System Coupe or CVT Control System Sedan
- VQ35DE models: CVT Control System Coupe or CVT Control System Sedan
Is the inspection result normal?
YES (Present error)-Replace the TCM. Refer to the following.
- QR25DE models: Removal And Installation
- VQ35DE models: Removal And Installation
YES (Past error)-Error was detected in the TCM branch line.
NO- Repair the power supply and the ground circuit.