9000 - 9999: 9349

9349-CAN B BUS CIRCUIT

For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
Continuously.

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





Diagnostic Test

1. DTC IS ACTIVE
Ignition on, engine not running.
With the scan tool, select Clear Stored DTCs in the Steering Control Module.
Cycle the ignition from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.
With the Scan Tool, select View DTCs in the Steering Control Module.
Does the DTC reset and/or remain active?

Yes

- Go to 2

No

- Go to 6

2. CAN B BUS DTCs SET IN FRONT CONTROL MODULE
With the Scan Tool, select View DTCs in the Front Control Module (FCM).
Are there any active CAN B Bus DTCs?

Yes

- Refer to appropriate diagnostic procedure.

No

- Go to 3


3. (D55) CAN B BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the Steering Control Module harness connector.
Disconnect the Front Control Module C1 harness connector.
Measure the resistance of the (D55) CAN B Bus (+) circuit between the Steering Control Module harness connector and the Front Control Module C1 harness connector.
Is the resistance above 2.0 ohms?

Yes

- Repair the (D55) CAN B Bus (+) circuit for an open.

No

- Go to 4

4. (D54) CAN B BUS (-) CIRCUIT OPEN
Measure the resistance of the (D54) CAN B Bus (-) circuit between the Steering Control Module harness connector and the Front Control Module C1 harness connector.
Is the resistance above 2.0 ohms?

Yes

- Repair the (D54) CAN B Bus (-) circuit for an open.

No

- Go to 5

5. STEERING CONTROL MODULE (SCM)
Inspect the wiring between the Steering Control 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.


Repair

- Replace the Steering Control Module (SCM).

6. INTERMITTENT CAN B BUS CIRCUIT DTC
The conditions necessary to set this DTC are not present at this time.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
Look for the data to change or for the DTC to reset during the wiggle test.
Were any problems found?

Yes

- Repair as necessary.

No

- Test complete.