EBC340

U0002-CAN C BUS OFF PERFORMANCE





For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

- When Monitored:
Continuously.

- Set Condition:
Whenever the CAN C Bus (+) or CAN C Bus (-) is open, shorted to voltage or shorted to ground.





1. DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, clear DTCs in the Anti-lock Brake Module.
3. Cycle the ignition from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.
4. With the scan tool, select View DTCs in the Anti-lock Brake Module.

Does the DTC reset and/or remain active?

Yes

- Go To 2

No

- Go To 6

2. CAN C BUS DTCs SET IN FRONT CONTROL MODULE
1. With the scan tool, select View DTCs in the Front Control Module (FCM).

Are there any active CAN C Bus DTCs?

Yes

- Perform the appropriate diagnostic procedure Testing and Inspection.

No

- Go To 3

3. (D65) CAN C BUS (+) CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Anti-lock Brake Module harness connector.
3. Disconnect the Front Control Module C1 harness connector.
4. Measure the resistance of the (D65) CAN C Bus (+) circuit between the Anti-lock Brake Module harness connector and the Front Control Module C1 harness connector.

Is the resistance above 2.0 ohms?

Yes

- Repair the (D65) CAN C Bus (+) circuit for an open.
- Perform ABS VERIFICATION TEST ABS Verification Test.

No

- Go To 4

4. (D64) CAN C BUS (-) CIRCUIT OPEN




1. Measure the resistance of the (D64) CAN C Bus (-) circuit between the Anti-lock Brake Module harness connector and the Front Control Module C1 harness connector.

Is the resistance above 2.0 ohms?

Yes

- Repair the (D64) CAN C Bus (-) circuit for an open.
- Perform ABS VERIFICATION TEST ABS Verification Test.

No

- Go To 5

5. ANTI-LOCK BRAKE MODULE
1. Inspect the wiring between the Anti-lock Brake Module harness connector and the Front Control Module harness connector. If any problems are found, repair as necessary. If no problems are found, view repair.

If no problems are found, view repair.

Repair

- Replace the Anti-lock Brake Module.
- Perform ABS VERIFICATION TEST ABS Verification Test.

6. INTERMITTENT CAN C BUS OFF PERFORMANCE DTC
1. The conditions necessary to set this DTC are not present at this time.
2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
3. While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
4. Look for the data to change or for the DTC to reset during the wiggle test.

Were any problems found?

Yes

- Repair as necessary.
- Perform ABS VERIFICATION TEST ABS Verification Test.

No

- Test complete.