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Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (DTCS B2102 To U0121) >> U0019-Can B Bus >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1) VERIFY DTC U0019-CAN B BUS IS ACTIVE 

    Turn the ignition on.

    With the scan tool, read Occupant Restraint Controller (ORC) DTCs.

    Does the scan tool display active: U0019-CAN B BUS? 

    Yes 

    1. Go to  2).

    No 

    1. If the DTC is stored, check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded or contaminated terminals.
    2. Perform *ORC VERIFICATION TEST - VER 1 .
  2. 2) CHECK FOR ACTIVE CAN B BUS RELATED DTCS IN THE FRONT CONTROL MODULE (FCM) 

    With the scan tool, read Front Control Module (FCM) DTCs

    Does the scan tool display any active CAN B BUS related DTCs? 

    Yes 

    1. Diagnose and repair the DTC(s). Refer to DIAGNOSIS AND TESTING .

    No 

    1. Go to  3).
  3. 3) CHECK (D55) CAN B BUS (+) CIRCUIT FOR AN OPEN 
    Fig 1: Checking CAN B BUS (+) Circuit
    GC0027716Courtesy of CHRYSLER LLC
    WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
    WARNING: If the Occupant Restraint Controller is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment and serious or fatal injury.

    Disconnect the ORC C2 connector.

    NOTE: Check connectors - Clean and repair as necessary.

    Connect the Load Tool ORC 8443-24 Adapter to the ORC C2 connector.

    Disconnect the Front Control Module (FCM) C1 connector.

    Measure the resistance of the (D55) CAN B Bus (+) circuit between the Front Control Module C1 connector and the ORC C2 connector.

    Is the resistance below 2.0 ohms? 

    Yes 

    1. Go to  4).

    No 

    1. Repair the (D55) CAN B Bus (+) circuit for an open.
    2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
  4. 4) CHECK (D54) CAN B BUS (-) CIRCUIT FOR AN OPEN 
    Fig 2: Checking CAN B BUS (-) Circuit
    GC0027717Courtesy of CHRYSLER LLC

    Measure the resistance of the (D54) CAN B Bus (-) circuit between the Front Control Module C1 connector and the ORC C2 connector.

    Is the resistance below 2.0 ohms? 

    Yes 

    1. Replace the ORC in accordance with the Service Information.

    No 

    1. Repair the (D54) CAN B Bus (-) circuit for an open.
    2. Perform *AIRBAG SYSTEM VERIFICATION TEST - VER 1 .
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