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 two seconds.





1. CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)S

NOTE: Check for any Technical Service Bulletins (TSBs) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

1. Using the scan tool, read the active DTCs.
2. Cycle the ignition switch from off to on at least five times, leaving the ignition on for a minimum of 90 seconds each 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 TIPM FOR U0019 DTC
1. Using the scan tool, read TIPM active DTCs

Does the scan tool display U0019 CAN B BUS - ACTIVE?

Yes

- U0019 Perform the U0019 CAN B BUS diagnostic procedure.

No

- Go To 3

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




1. Turn the ignition off.
2. Disconnect the TIPM C3 harness 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.