U0001-CAN C BUS CIRCUIT
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 CONTROL MODULE |
| TRANSMISSION CONTROL MODULE (CVT) |
| ENGINE CONTROL MODULE (DIESEL ONLY) |
| STEERING ANGLE SENSOR |
| ALL WHEEL DRIVE 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 U0001–CAN C BUS CIRCUIT 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 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 Antilock Brake Module in accordance with the service information.
- Perform the ABS VERIFICATION TEST — VER 1.
3. POWERTRAIN CONTROL MODULE — INTERNAL SHORT
Turn the ignition off.
NOTE: If vehicle is not equipped with this module, answer yes to the question.
Disconnect the Powertrain 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 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 in accordance with the service information.
- Perform the POWERTRAIN VERIFICATION TEST VER - 5.
4. TRANSMISSION CONTROL MODULE (CVT) — INTERNAL SHORT
Turn the ignition off.
NOTE: If vehicle is not equipped with this module, answer yes to the question.
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 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 the Transmission Control Module in accordance with the service information.
- Perform the appropriate VERIFICATION TEST VER 1.
5. ENGINE CONTROL MODULE (DIESEL ONLY) — INTERNAL SHORT
Turn the ignition off.
NOTE: If vehicle is not equipped with this module, answer yes to the question.
Disconnect the 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 U0001–CAN C BUS CIRCUIT as active?
Yes
- Go To 6
No
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Engine Control Module in accordance with the service information.
- Perform the ECM VERIFICATION TEST.
6. STEERING ANGLE SENSOR— INTERNAL SHORT
Turn the ignition off.
NOTE: If vehicle is not equipped with this sensor, answer yes to the question.
Disconnect the Steering Angle Sensor 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 CIRCUIT as active?
Yes
- Go To 7
No
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Steering Angle Sensor in accordance with the service information.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
7. ALL WHEEL DRIVE CONTROL (AWD) MODULE — INTERNAL SHORT
Turn the ignition off.
NOTE: If vehicle is not equipped with this module, answer yes to the question.
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 CIRCUIT as active?
Yes
- Go To 8
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 BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
8. (D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Totally Integrated Power Module C2 and C3 harness connectors.
Turn the ignition on.
Measure the voltage between the (D65) CAN C Bus (+) circuit and ground on both connectors.
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 9
9. (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 10
10. (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 11
11. (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 12
12. (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 Totally Integrated Power Module in accordance with the service information.
- Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).