U0002

U0002-CAN C BUS OFF PERFORMANCE

For a complete wiring diagram refer to the Wiring Information Electrical Diagrams.





For a complete wiring diagram refer to the Wiring Information Electrical Diagrams.

- When Monitored:
With the ignition on.

- Set Condition:
The FCM detects a short in either CAN C Bus circuit.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase FCM DTC's.
3. Cycle the ignition from on to off 3 times.
4. Turn the ignition on.
5. With the scan tool, read active FCM DTC's.

Does the scan tool display U0002-CAN C BUS OFF PERFORMANCE 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. ANTI-LOCK BRAKE MODULE - INTERNAL SHORT
1. Turn the ignition off.
2. Disconnect the Anti-Lock Brake Module harness connector.
3. Turn the ignition on.
4. With the scan tool, record and erase FCM DTC's.
5. Cycle the ignition from on to off 3 times.
6. Turn the ignition on.
7. With the scan tool, read active FCM DTC's.

Does the scan tool display U0001-CAN C BUS CIRCUIT as active?

Yes

- Go To 3

No

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

3. POWERTRAIN CONTROL MODULE - INTERNAL SHORT
1. Turn the ignition off.
2. Disconnect the Powertrain Control Module C1 harness connector.
3. Turn the ignition on.
4. With the scan tool, record and erase FCM DTC's.
5. Cycle the ignition from on to off 3 times.
6. Turn the ignition on.
7. With the scan tool, read active FCM DTC's.

Does the scan tool display U0001-CAN C BUS CIRCUIT as active?

Yes

- Go To 4

No

- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Powertrain Control Module.
- Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 5. Powertrain Verification Test

4. STEERING ANGLE SENSOR - INTERNAL SHORT
1. Turn the ignition off.
2. Disconnect the Steering Angle Sensor harness connector.
3. Turn the ignition on.
4. With the scan tool, record and erase FCM DTC's.
5. Cycle the ignition from on to off 3 times.
6. Turn the ignition on.
7. With the scan tool, read active FCM DTC's.

Does the scan tool display U0001-CAN C BUS CIRCUIT as active?

Yes

- Go To 5

No

- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Steering Angle Sensor (internal to clockspring).
- Perform ABS VERIFICATION TEST ABS Verification Test

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




1. Turn the ignition off.
2. Disconnect the Front Control Module C1 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 BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 6

6. (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 BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 7

7. (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 BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 8

8. (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 BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 9

9. (D65) CAN C BUS (+) CIRCUIT SHORTED TO (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 BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Front Control Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test