U1106

U1106-CAN C SIGNAL MISSING







- When Monitored:
With the ignition on.

- Set Condition:
A CAN C Bus module detects a short in either CAN C Bus circuit.





1. TEST FOR INTERMITTENT CONDITION

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. Turn the ignition on.
2. Using the scan tool, record and erase active DTCs.
3. Cycle the ignition from on to off three times.
4. Turn the ignition on.
5. Using the scan tool, read active DTCs.

Does the scan tool display this DTC 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
1. Turn the ignition off.
2. Disconnect the Antilock Brake Module harness connector.
3. Turn the ignition on.
4. Using the scan tool, record and erase active DTCs.
5. Cycle the ignition from on to off three times.
6. Turn the ignition on.
7. Using the scan tool, read active DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 3

No

- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Antilock Brake Module.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

3. POWERTRAIN OR ENGINE CONTROL MODULE - INTERNAL SHORT
1. Turn the ignition off.
2. Disconnect the Powertrain or Engine Control Module C1 harness connector.
3. Turn the ignition on.
4. Using the scan tool, record and erase active DTCs.
5. Cycle the ignition from on to off three times.
6. Turn the ignition on.
7. Using the scan tool, read active DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 4

No

- Inspect the wiring and connectors for damage or shorted circuits. If okay, replace and program the Powertrain or Engine Control Module.
- Perform the POWERTRAIN OR ECM VERIFICATION TEST. Verification Tests for gasoline engine applications.

4. CLOCKSPRING (SAS) - INTERNAL SHORT
1. Turn the ignition off.
2. Disconnect the Clockspring C3 (SAS) harness connector.
3. Turn the ignition on.
4. Using the scan tool, record and erase active DTCs.
5. Cycle the ignition from on to off three times.
6. Turn the ignition on.
7. Using the scan tool, read active DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 5

No

- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Clockspring (SAS).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. TRANSMISSION CONTROL MODULE (MPS6) - INTERNAL SHORT
1. Turn the ignition off.
2. Disconnect the TCM harness connector.
3. Turn the ignition on.
4. Using the scan tool, record and erase active DTCs.
5. Cycle the ignition from on to off three times.
6. Turn the ignition on.
7. Using the scan tool, read active DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 6

No

- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Transmission Control Module.
- Perform the MPS6 TRANSMISSION VERIFICATION TEST. .

6. (D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the TIPM C2 harness connector.
3. Turn the ignition on.
4. 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. Body Verification Test.

No

- Go To 7

7. (D64) CAN C BUS (-) CIRCUIT SHORTED TO VOLTAGE




1. 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. Body Verification Test.

No

- Go To 8

8. (D65) CAN C BUS (+) CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. 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. Body Verification Test.

No

- Go To 9

9. (D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND




1. 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. Body Verification Test.

No

- Go To 10

10. (D65) CAN C BUS (+) CIRCUIT SHORTED TO THE (D64) CAN C BUS (-) CIRCUIT




1. 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. Body Verification Test.

No

- Inspect the wiring and connectors for damage or shorted circuits. If okay, replace and program the module that set this DTC.
- Perform the BODY VERIFICATION TEST. Body Verification Test.