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Home >> Jeep >> 2021 >> Compass Altitude, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 ((Electronic Shift Module (ESM) - Electrical Diagnostics)) >> DTC Troubleshooting >> U0100-00-Lost Communication With ECM/Pcm

U0100-00-Lost Communication With ECM/Pcm

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The COMMUNICATION DIAGNOSTIC PROCEDURE MUST  be performed before replacing any component(s) or module(s). Perform the COMMUNICATION DIAGNOSTIC PROCEDURE. Refer to COMMUNICATION DIAGNOSTIC PROCEDURE .

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