CAN

PWBD 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).
-Automatic back door control module
-CAN gateway
Is the inspection result normal?
YES - GO TO 2.
NO- Repair the terminal and connector.

2. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.Disconnect the connector of CAN gateway.
2.Check the continuity between the CAN gateway harness connector terminals.





Is the inspection result normal?
YES- GO TO 3.
NO- Check the harness and repair the root cause (CAN communication circuit 2 side). Refer to LAN38, "System Diagram".

3. CHECK HARNESS FOR OPEN CIRCUIT

1.Connect the connector of CAN gateway.
2.Disconnect the connector of automatic back door control module.
3.Check the resistance between the automatic back door control module harness connector terminals.





Is the measurement value within the specification?
YES- GO TO 4.
NO- Repair the automatic back door control module branch line.

4. CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the automatic back door control module. Refer to "AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure" Power Supply and Ground Circuit.
Is the inspection result normal?
YES (Present error)-Replace the automatic back door control module. Refer to "Removal and Installation" Automatic Back Door Control Module.
YES (Past error)-Error was detected in the automatic back door control module branch line.
NO- Repair the power supply and the ground circuit.