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Home >> Jeep >> 2012 >> Compass Limited, AWD, Automatic CVT, CVT2L >> Repair and Diagnosis >> External Pages >> Different car >> Section 571 (Body Control Module (BCM) - DTCS B1D4E-15 To U1433-24) >> DTC Troubleshooting >> U0143-00-Lost Communication With Multi-Purpose Module (Vehicle System Interface Module) (VSIM) >> Diagnostic Test
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Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Charger and 2015 Dodge Charger. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read Body Control Module (BCM) DTCs and record on the repair order.

      Is the DTC active?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS 
    1. With the scan tool, read active DTCs from all modules.
      NOTE:

      Check for BCM configuration, Controller Area Network (CAN) IHS Bus hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

      Does the scan tool display any active DTCs to the conditions listed above?

      Yes 

      No 

      • Go To  3
  3. VERIFY THE VEHICLE SYSTEM INTERFACE MODULE (VSIM) IS ACTIVE ON THE BUS 
    1. Turn the ignition on.
    2. With the scan tool, verify the VSIM is active on the bus.

      Is the VSIM active on the bus?

      Yes 

      • Go To  4

      No 

      • Refer to DIAGNOSIS AND TESTING and perform the NO RESPONSE FROM VSIM (VEHICLE SYSTEM INTERFACE MODULE) diagnostic procedure.
  4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS 
    1. With the scan tool, read all the DTCs.

      Is there more than one module with active DTCs "Logged Against" the VSIM?

      Yes 

      No 

      • Go To  5
  5. CLEAR DTC IN MODULE SETTING FAULT 
    1. With the scan tool, select the module setting the DTC against the VSIM.
    2. Clear active DTCs.

      Is this DTC still active?

      Yes 

      • Replace/update the module that set this DTC in accordance with the Service Information.
      • Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  6
  6. CYCLE IGNITION 
    1. Cycle the ignition from RUN to OFF three times ending with the key in the RUN position.

      Does this DTC become active?

      Yes 

      • Go To  7

      No 

      • The condition is not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
      • Perform the appropriate verification test for the module. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  7. CHECK FOR ADDITIONAL LOST COMMUNICATION FAULTS 
    1. With the scan tool, read the DTCs.

      Does the BCM and other CAN IHS BUS modules show Lost Communication with the remaining CAN IHS BUS modules?

      Yes 

      • Go To  8

      No 

      • Replace/update the module that set this DTC in accordance with the Service Information.
      • Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  8. CHECK THE (D397) CAN IHS BUS (+) CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Measure the voltage between the (D397) CAN IHS Bus (+) circuit and ground at the Data Link Connector (DLC).

      Is the voltage above 5.0 volts?

      Yes 

      • Repair the short to voltage in the (D397) CAN IHS Bus (+) circuit. The short to voltage is present in one of the CAN IHS Bus (+) circuits. Use the Star Connectors to isolate portions of the CAN IHS Bus (+) in order to locate the concern.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  9
  9. CHECK THE (D396) CAN IHS BUS (-) CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Check for continuity between ground and the (D396) CAN IHS Bus (-) circuit at the DLC.

      Is there continuity between ground and the (D396) CAN IHS Bus (-) circuit?

      Yes 

      • Repair the short to ground in the (D396) CAN IHS Bus (-) circuit. The short to ground is present in one of the CAN IHS Bus (-) circuits. Use the Star Connectors to isolate portions of the CAN IHS Bus (-) in order to locate the concern.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace/update the module that set this DTC in accordance with the Service Information.
      • Perform the appropriate verification test for the module being replaced. If there is no verification test for the associated module perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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