U1105

U1105-CAN B SIGNAL MISSING





For a complete wiring diagram consult Diagrams/Electrical.


- When Monitored:
Continuously

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








Diagnostic Test


1. CHECK FOR ACTIVE DTCS
With the scan tool, read the active DTC's.
Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.
With the scan tool, read the active DTC's.
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 U0019 DTC
With the scan tool, read Totally Integrated Power Module active DTC's
Does the scan tool display this DTC as active?

Yes


- Perform the U0019 diagnostic procedure. U0019


No


- Go To 3




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




Turn the ignition off.
Disconnect the Totally Integrated Power Module C5 connector.
Turn the ignition on.
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 - VER 1. Body Verification Test.




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




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 - VER 1. Body Verification Test.


No


- Repair the (D54) CAN B Bus (-) circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.