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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Antilock Brake System (Abs) - Electrical Diagnostics) >> DTC Troubleshooting >> U0101-00-Lost Communication With TCM >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2014 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
  1. VERIFY THE DTC IS ACTIVE 
    1. Ignition on, engine not running.
    2. With the scan tool, read and record ABS DTCs.
    3. With the scan tool, read and record Environmental Data (EV Data).
    4. With the scan tool, erase ABS DTCs.
    5. Cycle the ignition switch.
    6. With the scan tool, read ABS DTCs.

      Is the DTC active at this time?

      Yes 

      • Go To  2

      No 

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

      Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

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

      Yes 

      • Diagnose and repair the DTCs. Go to the applicable diagnostic service information. .

      No 

      • Go To  3
  3. VERIFY THAT THE PCM IS ACTIVE ON THE BUS 
    1. With the scan tool, select ECU View.
    2. Verify that the PCM is active on the bus.

      Is the PCM active on the bus?

      Yes 

      • Go To  4

      No 

  4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCs 
    1. With the scan tool, select Network View and select Advanced.

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

      Yes 

      No