U1106-CAN C SIGNAL MISSING
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
With the ignition on.
- Set Condition:
The TIPM detects a short in either CAN C Bus circuit.
| Possible Causes |
| (D65) CAN C BUS (+) CIRCUIT SHORTED TO GROUND |
| (D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND |
| (D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE |
| (D64) CAN C BUS (-) CIRCUIT SHORTED TO VOLTAGE |
| (D65) CAN C BUS (+) CIRCUIT SHORTED TO (D64) CAN C BUS (-) CIRCUIT |
| ANTILOCK BRAKE MODULE |
| POWERTRAIN or ENGINE CONTROL MODULE |
| TRANSMISSION CONTROL MODULE |
| ALL WHEEL DRIVE CONTROL MODULE |
| STEERING CONTROL MODULE |
| TOTALLY INTEGRATED POWER MODULE |
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITIONNOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U1106–CAN C SIGNAL MISSING as active?
Yes
- Go To 2
No
- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. ANTILOCK BRAKE MODULE — INTERNAL SHORT
Turn the ignition off.
Disconnect the Antilock Brake Module harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U1106–CAN C SIGNAL MISSING as active?
Yes
- Go To 3
No
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Antilock Brake Module in accordance with the service information.
- Perform the ABS VERIFICATION TEST — VER 1.
3. POWERTRAIN OR ENGINE CONTROL MODULE — INTERNAL SHORT
Turn the ignition off.
Disconnect the Powertrain or Engine Control Module C1 harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U1106–CAN C SIGNAL MISSING as active?
Yes
- Go To 4
No
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Powertrain or Engine Control Module in accordance with the service information.
- Perform the appropriate POWERTRAIN VERIFICATION TEST.
4. TRANSMISSION CONTROL MODULE — INTERNAL SHORT
Turn the ignition off.
Disconnect the Transmission Control Module C1 harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U1106–CAN C SIGNAL MISSING as active?
Yes
- Go To 5
No
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Transmission Control Module in accordance with the service information.
- Perform the appropriate TRANSMISSION VERIFICATION TEST.
5. ALL WHEEL DRIVE CONTROL (AWD) MODULE — INTERNAL SHORT
Turn the ignition off.
Disconnect the AWD Module harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U0001–CAN C BUS as active?
Yes
- Go To 6
No
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the All Wheel Drive Control (AWD) Module in accordance with the service information.
- Perform the appropriate VERIFICATION TEST.
6. STEERING CONTROL MODULE (SAS) — INTERNAL SHORT
Turn the ignition off.
Disconnect the Steering Control Module (SAS) harness connector.
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display U1106–CAN C SIGNAL MISSING as active?
Yes
- Go To 7
No
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Steering Control Module (SAS) in accordance with the service information.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
7. (D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the TIPM C3 harness connector.
Turn the ignition on.
Measure the voltage between the (D65) CAN C Bus (+) circuit and ground.
Is there any voltage present?
Yes
- Repair the (D65) CAN C Bus (+) circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 8
8. (D64) CAN C BUS (-) CIRCUIT SHORTED TO VOLTAGE
Measure the voltage between the (D64) CAN C Bus (-) circuit and ground.
Is there any voltage present?
Yes
- Repair the (D64) CAN C Bus (-) circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 9
9. (D65) CAN C BUS (+) CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Measure the resistance between ground and the (D65) CAN C Bus (+) circuit.
Is any resistance present?
Yes
- Repair the (D65) CAN C Bus (+) circuit for a short to ground.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 10
10. (D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (D64) CAN C Bus (-) circuit.
Is any resistance present?
Yes
- Repair the (D64) CAN C Bus (-) circuit for a short to ground.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Go To 11
11. (D65) CAN C BUS (+) CIRCUIT SHORTED TO (D64) CAN C BUS (-) CIRCUIT
Measure the resistance between the (D65) CAN C Bus (+) circuit and the (D64) CAN C Bus (-) circuit.
Is any resistance present?
Yes
- Repair the (D65) CAN C Bus (+) circuit for a short to the (D64) CAN C Bus (-) circuit.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
No
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the TIPM in accordance with the service information.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).