CAN

MAIN LINE BETWEEN BCM AND ABS 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 (connector side and harness side).
-Harness connector M20 and PCB harness side connector
-Harness connector M7
-Harness connector B1
-Harness connector M6
-Harness connector E106
Is the inspection result normal?
YES- GO TO 2.
NO- Repair the terminal and connector.

2. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.Disconnect the following harness connectors.
- BCM
-Harness connector M20
2.Check the continuity between the BCM harness connector and the PCB harness connector.





Is the inspection result normal?
YES- GO TO 3.
NO- Replace the PCB harness.

3. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.Disconnect the harness connectors M7 and B1.
2.Check the continuity between the harness connectors.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair the main line between the harness connectors M20 and M7.

4. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

Check the continuity between the harness connector terminals.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair the main line between the harness connector terminals.

5. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.Disconnect the harness connectors M6 and E106.
2.Check the continuity between the harness connectors.





Is the inspection result normal?
YES- GO TO 6.
NO- Repair the main line between the harness connectors M7 and M6.

6. CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.Disconnect the connector of ABS actuator and electric unit (control unit).
2.Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)
harness connector.





Is the inspection result normal?
YES (Present error)-Check CAN system type decision again.
YES (Past error)-Error was detected in the main line between the BCM and the ABS actuator and electric unit (control unit).
NO- Repair the main line between the harness connector E106 and the ABS actuator and electric unit (control unit).