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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 58 (Vehicle Theft Security System - Electrical Diagnostics) >> Vehicle Theft Security - Electrical Diagnostics >> DTC Troubleshooting >> U0019-Can B Bus - ITM >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1)  CHECK FOR ACTIVE DTCS 

    With the scan tool, read the active DTC's.

    Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.

    With the scan tool, read the active DTC's.

    Does the scan tool display this DTC as active? 

    Yes 

    1. Go To  2).

    No 

    1. If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. 2)  CHECK FRONT CONTROL MODULE DTC's 

    With the scan tool, read Front Control Module active DTC's

    Does the scan tool display any CAN B BUS DTC's - ACTIVE? 

    Yes 

    1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING)

    No 

    1. Go To  3).
  3. 3)  (D55) CAN B BUS (+) CIRCUIT OPEN 
    Fig 1: Measuring Resistance Of CAN B Bus (+) Circuit
    GC0040892Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the negative battery cable.

    Disconnect the Intrusion Transceiver Module connector.

    Disconnect the Front Control Module C1 connector.

    Measure the resistance of the (D55) CAN B Bus (+) circuit between the Front Control Module C1 connector and the Intrusion Transceiver Module 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 BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
  4. 4)  (D54) CAN B BUS (-) CIRCUIT OPEN 
    Fig 2: Measuring Resistance Of CAN B Bus (-) Circuit
    GC0040893Courtesy of DAIMLERCHRYSLER CORP.

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

    Is the resistance below 2.0 ohms? 

    Yes 

    1. Replace the Intrusion Transceiver Module in accordance with the service information.
    2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)

    No 

    1. Repair the (D54) CAN B Bus (-) circuit for an open.
    2. Perform BODY VERIFICATION TEST - VER 1. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)
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