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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 317 (Electronic Shift Module (ESM) - Electrical Diagnostics - 8HP70 Automatic Transmission - 1500) >> Diagnosis And Testing >> U0100-00-Lost Communication With ECM/Pcm >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
PCM - INTERNAL ERROR
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION OR VIN MESSAGES
POWERTRAIN CONTROL MODULE POWER AND GROUND
MODULE THAT SET THIS DTC

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE   . 

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