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Home >> Jeep >> 2018 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 45 (8HP45/845RE Automatic Transmission - DTCS P0219-00 To P1D93-00) >> DTC Troubleshooting >> P0634-00-Pcm-ECM-TCM Internal Temperature Too High >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different variant/trim than selected.

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