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Home >> Jeep >> 2014 >> Compass Limited, AWD, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 174 ((Transmission Control Module (TCM) - Electrical Diagnostics)) >> DTC Troubleshooting >> P1636-TCM Internal- External Watchdog Performance >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different car, the 2012 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.

The Transmission Control Module (TCM) performs various internal tests to verify proper controller operation. This DTC indicates that watchdog circuitry external to the microprocessor has detected an error. If the TCM watch dog circuitry external to the microprocessor detects an error, the controller will enter Limp-in mode and illuminate the MIL.

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