CAN

ABS 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).
-ABS actuator and electric unit (control unit)
-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 ABS actuator and electric unit (control unit).
3.Check the resistance between the ABS actuator and electric unit (control unit) harness connector terminals.





Is the measurement value within the specification?
YES- GO TO 4.
NO- Repair the ABS actuator and electric unit (control unit) branch line.

4. CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to
Power Supply and Ground Circuit.
Is the inspection result normal?
YES (Present error)-Replace the ABS actuator and electric unit (control unit). Removal and Installation.
YES (Past error)-Error was detected in the ABS actuator and electric unit (control unit) branch line.
NO- Repair the power supply and the ground circuit.