Diagnostic Test

WARNING: This page is about a different car, the 2009 Jeep Patriot and 2009 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.
1. Turn the ignition on.
2. With the scan tool, record and erase TIPM DTCs.
3. Cycle the ignition from on to off 3 times.
4. Turn the ignition on.
5. With the scan tool, read active TIPM DTCs.
  Does the scan tool display U0002-CAN C BUS OFF PERFORMANCE as active?
  
  Yes
  - Go to step 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.
  - Perform ABS INTERMITTENT TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
ANTILOCK BRAKE MODULE -INTERNAL SHORT
1. Turn the ignition off.
2. Disconnect the Antilock Brake Module harness connector.
3. Turn the ignition on.
4. With the scan tool, record and erase TIPM DTCs.
5. Cycle the ignition from on to off 3 times.
6. Turn the ignition on.
7. With the scan tool, read active TIPM DTCs.
  Does the scan tool display U0002-CAN C BUS OFF PERFORMANCE as active?
  
  Yes
  - Go to step 3
  No
  - Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Anti-Lock Brake Module in accordance with the service information.
  - Perform ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
POWERTRAIN CONTROL MODULE - INTERNAL SHORT
1. Turn the ignition off.
  NOTE: If vehicle is not equipped with this module, answer yes to the question.
2. Disconnect the Powertrain Control Module C1 harness connector.
3. Turn the ignition on.
4. With the scan tool, record and erase TIPM DTCs.
5. Cycle the ignition from on to off 3 times.
6. Turn the ignition on.
7. With the scan tool, read active TIPM DTCs.
  Does the scan tool display U0002-CAN C BUS OFF PERFORMANCE as active?
  
  Yes
  - Go to step 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. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
TRANSMISSION CONTROL MODULE (CVT) - INTERNAL SHORT
1. Turn the ignition off.
  NOTE: If vehicle is not equipped with this module, answer yes to the question.
2. Disconnect the Transmission Control Module C1 harness connector.
3. Turn the ignition on.
4. With the scan tool, record and erase TIPM DTCs.
5. Cycle the ignition from on to off 3 times.
6. Turn the ignition on.
7. With the scan tool, read active TIPM DTCs.
  Does the scan tool display U0002-CAN C BUS OFF PERFORMANCE as active?
  
  Yes
  - Go to step 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 TRANSMISSION VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
ENGINE CONTROL MODULE (DIESEL ONLY) - INTERNAL SHORT
1. Turn the ignition off.
  NOTE: If vehicle is not equipped with this module, answer yes to the question.
2. Disconnect the Engine Control Module C1 harness connector.
3. Turn the ignition on.
4. With the scan tool, record and erase TIPM DTCs.
5. Cycle the ignition from on to off 3 times.
6. Turn the ignition on.
7. With the scan tool, read active TIPM DTCs.
  Does the scan tool display U0002-CAN C BUS OFF PERFORMANCE as active?
  
  Yes
  - Go to step 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. Refer to DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure .
STEERING ANGLE SENSOR- INTERNAL SHORT
1. Turn the ignition off.
  NOTE: If vehicle is not equipped with this sensor, answer yes to the question.
2. Disconnect the Steering Angle Sensor harness connector.
3. Turn the ignition on.
4. With the scan tool, record and erase TIPM DTCs.
5. Cycle the ignition from on to off 3 times.
6. Turn the ignition on.
7. With the scan tool, read active TIPM DTCs.
  Does the scan tool display U0002-CAN C BUS OFF PERFORMANCE as active?
  
  Yes
  - Go to step 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 ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
ALL WHEEL DRIVE CONTROL (AWD) MODULE - INTERNAL SHORT
1. Turn the ignition off.
  NOTE: If vehicle is not equipped with this module, answer yes to the question.
2. Disconnect the AWD Module harness connector.
3. Turn the ignition on.
4. With the scan tool, record and erase TIPM DTCs.
5. Cycle the ignition from on to off 3 times.
6. Turn the ignition on.
7. With the scan tool, read active TIPM DTCs.
  Does the scan tool display U0002-CAN C BUS OFF PERFORMANCE as active?
  
  Yes
  - Go to step 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. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
(D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE

Fig 1: CHECKING CAN C BUS (+) CIRCUIT FOR SHORT TO VOLTAGE
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Totally Integrated Power Module C2 and C3 harness connectors.
3. Turn the ignition on.
4. 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. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 9
(D64) CAN C BUS (-) CIRCUIT SHORTED TO VOLTAGE

Fig 2: CHECKING CAN C BUS (-) CIRCUIT FOR SHORT TO VOLTAGE
Courtesy of CHRYSLER LLC
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. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 10
(D65) CAN C BUS (+) CIRCUIT SHORTED TO GROUND

Fig 3: CHECKING CAN C BUS (+) CIRCUIT FOR SHORT TO GROUND
Courtesy of CHRYSLER LLC
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. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 11
(D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND

Fig 4: CHECKING CAN C BUS (-) CIRCUIT FOR SHORT TO GROUND
Courtesy of CHRYSLER LLC
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. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 12
(D65) CAN C BUS (+) CIRCUIT SHORTED TO (D64) CAN C BUS (-) CIRCUIT

Fig 5: Measuring Resistance Between CAN C Bus (+) Circuit & CAN C Bus (-) Circuit
Courtesy of CHRYSLER LLC
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. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - 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. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .