LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 95 (Electronic Control Modules - Electrical Diagnostics) >> Electronic Control Modules - Electrical Diagnostics >> DTC Troubleshooting >> U0001-Can C Bus Circuit >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2006 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1)  TEST FOR INTERMITTENT CONDITION 

    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 

    1. Go To  2).

    No 

    1. 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. 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 

    1. Go To  3).

    No 

    1. Inspect the wiring and connectors for damage or shorted circuits. If OK, replace the Antilock Brake Module in accordance with the service information.
    2. Perform ABS VERIFICATION TEST .
  3. 3)  POWERTRAIN CONTROL MODULE (2.4L ONLY) - INTERNAL SHORT 

    Turn the ignition off.

    NOTE: If vehicle is not equipped with a 2.4L, 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 

    1. Go To  4).

    No 

    1. Inspect the wiring and connectors for damage or shorted circuits. If OK, replace and program the Powertrain Control Module. For removal and installation, refer to the ELECTRONIC CONTROL MODULES - SERVICE INFORMATION article, also see STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING .
    2. Perform (NGC) POWERTRAIN VERIFICATION TEST VER - 1. (Refer to NGC POWERTRAIN VERIFICATION TEST VER - 1) .
  4. 4)  GATEWAY MODULE (1.6L ONLY) - INTERNAL SHORT 

    Turn the ignition off.

    NOTE: If vehicle is not equipped with a 1.6L, answer yes to the question.

    Disconnect the Gateway 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 

    1. Go To  5).

    No 

    1. Inspect the wiring and connectors for damage or shorted circuits. If OK, replace the Gateway Module. For removal and installation, refer to the the ELECTRONIC CONTROL MODULES - SERVICE INFORMATION article.
    2. Perform the appropriate GATEWAY VERIFICATION TEST - VER 1 .
  5. 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 harness connectors.

    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 

    1. Go To  6).

    No 

    1. Inspect the wiring and connectors for damage or shorted circuits. If OK, replace and program the Engine Control Module. For removal and installation, refer to the ELECTRONIC CONTROL MODULES - SERVICE INFORMATION article, also see STANDARD PROCEDURE - PCM/ECM/SKREEM PROGRAMMING .
    2. Perform the VERIFICATION TEST.
  6. 6)  (D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE 
    Fig 1: MEASURING VOLTAGE BETWEEN THE CAN C BUS (+) CIRCUIT AND GROUND
    GC0043377Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the Totally Integrated Power Module 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 

    1. Repair the (D65) CAN C Bus (+) circuit for a short to voltage.
    2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1)  .

    No 

    1. Go To  7).
  7. 7)  (D64) CAN C BUS (-) CIRCUIT SHORTED TO VOLTAGE 
    Fig 2: MEASURING VOLTAGE BETWEEN CAN C BUS (-) CIRCUIT AND GROUND
    GC0043378Courtesy of DAIMLERCHRYSLER CORP.

    Measure the voltage between the (D64) CAN C Bus (-) circuit and ground.

    Is there any voltage present? 

    Yes 

    1. Repair the (D64) CAN C Bus (-) circuit for a short to voltage.
    2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1)  .

    No 

    1. Go To  8).
  8. 8)  (D65) CAN C BUS (+) CIRCUIT SHORTED TO GROUND 
    Fig 3: MEASURING RESISTANCE BETWEEN GROUND AND CAN C BUS (+) CIRCUIT
    GC0043379Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Measure the resistance between ground and the (D65) CAN C Bus (+) circuit.

    Is any resistance present? 

    Yes 

    1. Repair the (D65) CAN C Bus (+) circuit for a short to ground.
    2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1)  .

    No 

    1. Go To  9).
  9. 9)  (D64) CAN C BUS (-) CIRCUIT SHORTED TO GROUND 
    Fig 4: MEASURING RESISTANCE BETWEEN GROUND AND CAN C BUS (-) CIRCUIT
    GC0043380Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance between ground and the (D64) CAN C Bus (-) circuit.

    Is any resistance present? 

    Yes 

    1. Repair the (D64) CAN C Bus (-) circuit for a short to ground.
    2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1)  .

    No 

    1. Go To  10).
  10. 10)  (D65) CAN C BUS (+) CIRCUIT SHORTED TO (D64) CAN C BUS (-) CIRCUIT 
    Fig 5: MEASURING RESISTANCE BETWEEN CAN C BUS (+) CIRCUIT AND CAN C BUS (-) CIRCUIT
    GC0043381Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance between the (D65) CAN C Bus (+) circuit and the (D64) CAN C Bus (-) circuit.

    Is any resistance present? 

    Yes 

    1. Repair the (D65) CAN C Bus (+) circuit for a short to the (D64) CAN C Bus (-) circuit.
    2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1)  .

    No 

    1. 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.
    2. Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1)  .
scientia non olet · About LEMON Manuals