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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> 8HP50/850RE - DTCS P0219-00 To P1D91-00 >> DTC Troubleshooting >> P0634-00 - Control Module Internal Temperature A Too High >> Theory Of Operation

Theory Of Operation

The purpose of the diagnostic is to detect an over temperature shutdown of the Transmission Control Module (TCM) to protect the TCM hardware.