U1105

U1105-CAN B SIGNAL MISSING





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

- When Monitored:
Continuously

- Set Condition:
When the CAN B Bus messages are not received within 2 seconds.





1. CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Using the scan tool, read the active DTCs.
2. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 30 seconds per cycle.
3. Using the scan tool, read the active DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.

2. CHECK TOTALLY INTEGRATED POWER MODULE FOR DTC U0019
1. Using the scan tool, read Totally Integrated Power Module active DTCs

Does the scan tool display U0019 as active?

Yes

- Perform the U0019 CAN B BUS diagnostic procedure. U0019

No

- Go To 3

3. (D55) CAN B BUS (+) CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Totally Integrated Power Module C5 connector.
3. Turn the ignition on.
4. Measure the voltage of the (D55) CAN B Bus (+) circuit.

Is any voltage present on this circuit?

Yes

- Go To 4

No

- Repair the (D55) CAN B Bus (+) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test

4. (D54) CAN B BUS (-) CIRCUIT OPEN




1. Measure the voltage of the (D54) CAN B Bus (-) circuit.

Is any voltage present on this circuit?

Yes

- Replace the Totally Integrated Power Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Repair the (D54) CAN B Bus (-) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test