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Home >> Jeep >> 2009 >> Commander Sport, 3.7 K, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 ((Powertrain Control Module (Pcm) - Electrical Diagnostics - 545RFE Automatic Transmission)) >> DTC Troubleshooting >> U0100-No Communication With The ECM/Pcm >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. VERIFY DTC IS ACTIVE 
    NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding.
    1. Turn the ignition on.
    2. With the scan tool, read active DTCs.

      Is this DTC active?

      Yes 

      No