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Home >> Jeep >> 2011 >> Wrangler Sahara, Standard >> Repair and Diagnosis >> Engine Performance >> System >> 3.8L - DTCS P2107 To U1418 >> Diagnosis And Testing >> U0300-Internal Control Module Software Incompatibility >> Diagnostic Test
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Diagnostic Test

  1. PCM PROGRAMMED WITH INCORRECT SOFTWARE 
    1. Ignition on, engine not running.
    2. Refer to STANDARD PROCEDURE and program the PCM in accordance with the Service Information.
    3. Start the engine.
    4. Allow the engine to reach normal operating temperature.
    5. With the scan tool, select read the active DTCs.

      Does the scan tool display U0300-INTERNAL CONTROL MODULE SOFTWARE INCOMPATIBILITY?

      Yes 

      • Replace and program the Powertrain Control Module in accordance with the Service Information.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.

      No 

      • The PCM has been successfully programmed. Test is complete.
      • Refer to STANDARD PROCEDURE and perform the POWERTRAIN VERIFICATION TEST.
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