U1105-CAN B SIGNAL MISSING
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
Continuously
- Set Condition:
When the CAN B Bus messages are not received within 2 seconds.
| Possible Causes |
| OTHER CAN B BUS DTC's SET IN TIPM |
| (D55) CAN B BUS (+) CIRCUIT OPEN |
| (D54) CAN B BUS (-) CIRCUIT OPEN |
| TOTALLY INTEGRATED POWER MODULE |
Diagnostic Test
1. CHECK FOR ACTIVE DTCSNOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
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 TIPM FOR U0019 DTC
With the scan tool, read TIPM active DTC's
Does the scan tool display U0019 CAN B BUS – ACTIVE?
Yes
- Refer to the table of contents in this section and perform the U0019 diagnostic procedure.
No
- Go To 3
3. (D55) CAN B BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the TIPM C3 harness 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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
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 TIPM in accordance with the service information.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Repair the (D54) CAN B Bus (–) circuit for an open.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).