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Home >> Dodge and Ram >> 2011 >> Journey Express >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> (Drivetrain Control Module (DTCM) - Electrical Diagnostics) >> DTC Troubleshooting >> U0100-Lost Communication With The ECM/Pcm >> Diagnostic Test
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Diagnostic Test

  1. VERIFY THE DTC IS ACTIVE 
    1. Ignition on, engine not running.
    2. With the scan tool, read the DTCs.

      Is the DTC Active at this time?

      Yes 

      • Refer to  DIAGNOSIS AND TESTING  ,  and perform the U0100-Lost Communication with ECM/PCM diagnostic procedure.

      No 

      • Refer to  DIAGNOSIS AND TESTING  ,  and perform the Stored Lost Communication DTCs diagnostic procedure.
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