CAN

ADP BRANCH LINE CIRCUIT

Diagnosis Procedure


1. CHECK CONNECTOR

1.Turn the ignition switch OFF.
2.Disconnect the 12V battery cable from the negative terminal.
3.Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
-Driver seat control unit
-Harness connector B501
-Harness connector B11
-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 or replace (if shield line is open) the root cause (CAN communication circuit 2 side). System Diagram.

3. CHECK HARNESS FOR OPEN CIRCUIT

1.Connect the connector of CAN gateway.
2.Disconnect the connector of driver seat control unit.
3.Check the resistance between the driver seat control unit harness connector terminals.





Is the measurement value within the specification?
YES- GO TO 4.
NO- Repair the driver seat control unit branch line.

4. CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the driver seat control unit. Driver Seat Control Unit.
Is the inspection result normal?
YES (Present error)-Replace the driver seat control unit. Driver Seat Control Unit.
YES (Past error)-Error was detected in the driver seat control unit branch line.
NO- Repair the power supply and the ground circuit.