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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 163 (Occupant Restraint Controller (Orc) - DTCS B1C27 To U142A) >> DTC Troubleshooting >> U0002-Can C Bus Off Performance >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
  1. DETERMINE ACTIVE OR STORED DTC 
    NOTE:

    Make sure the battery is fully charged.

    1. Turn the ignition on.
    2. With the scan tool, read ORC DTCs.

      Is the DTC active or stored?

      ORC - ACTIVE DTC 

      • Go To  2

      ORC - STORED DTC 

  2. CHECK (D12) CAN C BUS (-) CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 1: Checking Can C Bus (-) Circuit For A Short To Voltage
    GC0150669Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Front Star Connector CAN C C2 harness connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (D12) CAN C BUS (-) circuit between the Front Star Connector CAN C C2 harness connector and ground.

      Is there any voltage present?

      Yes 

      • Repair the (D12) CAN C BUS (-) circuit for a short to voltage in accordance with the Service Information.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK (D11) CAN C BUS (+) CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 2: Checking Can C Bus (+) Circuit For A Short To Voltage
    GC0150672Courtesy of CHRYSLER GROUP, LLC
    1. Measure the voltage of the (D11) CAN C BUS (+) circuit between the Front Star Connector CAN C C2 harness connector and ground.

      Is there any voltage present?

      Yes 

      • Repair the (D11) CAN C BUS (+) circuit for a short to voltage in accordance with the Service Information.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK (D11) CAN C BUS (+) CIRCUIT FOR AN OPEN 
    Fig 3: Checking Can C Bus (+) Circuit For An Open
    GC0150674Courtesy of CHRYSLER GROUP, LLC
    WARNING:

    Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    1. Disconnect the ORC harness connectors.
      NOTE:

      Check connectors - Clean and repair as necessary.

    2. Connect the SRS Load Tool Adaptor (special tool #8443-28, SRS Load Tool Adapter) to the ORC harness connectors.
    3. Measure the resistance of the (D11) CAN C BUS (+) circuit between the Front Star Connector CAN C C2 harness connector and the SRS Load Tool Adapter (special tool #8443-28, SRS Load Tool Adapter).

      Is resistance below 5.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the (D11) CAN C BUS (+) circuit for an open in accordance with the Service Information.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
  5. CHECK (D12) CAN C BUS (-) CIRCUIT FOR AN OPEN 
    Fig 4: Checking Can C Bus (-) Circuit For An Open
    GC0150676Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (D12) CAN C BUS (-) circuit between the Front Star Connector CAN C C2 harness connector and the SRS Load Tool Adapter (special tool #8443-28, SRS Load Tool Adapter).

      Is resistance below 5.0 Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the (D12) CAN C BUS (-) circuit for an open in accordance with the Service Information.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
  6. CHECK (D11) CAN C BUS (+) CIRCUIT FOR A SHORT TO GROUND 
    Fig 5: Checking Can C Bus (+) Circuit For A Short To Ground
    GC0150677Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (D11) CAN C BUS (+) circuit between ground and the Front Star Connector CAN C C2 harness connector.

      Is the resistance below 100.0 Ohms?

      Yes 

      • Repair the (D11) CAN C BUS (+) circuit for a short to ground in accordance with the Service Information.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .

      No 

      • Go To  7
  7. CHECK (D12) CAN C BUS (-) CIRCUIT FOR A SHORT TO GROUND 
    Fig 6: Checking Can C Bus (-) Circuit For A Short To Ground
    GC0150678Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (D12) CAN C BUS (-) circuit between ground and the Front Star Connector CAN C C2 harness connector.

      Is the resistance below 100.0 Ohms?

      Yes 

      • Repair the (D12) CAN C BUS (-) circuit for a short to ground in accordance with the Service Information.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .

      No 

      • Go To  8
  8. REPLACE OCCUPANT RESTRAINT CONTROLLER (ORC) 

    When this code is set, view repair.

    Repair 

    WARNING:

    If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment. Failure to follow these instructions may result in possible serious or fatal injury.