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Home >> Jeep >> 2012 >> Compass Limited, AWD, Standard >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Transmission Control Module (TCM) - Electrical Diagnostics >> DTC Troubleshooting >> P0571-Brake Switch 1 Performance >> Theory Of Operation
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Theory Of Operation

The Transmission Control Module (TCM) monitors the brake switch 3 signal over the CAN Bus from the Totally Integrated Power Module (TIPM). If the Transmission is shifted into Drive position without confirming that the brake was depressed before the shift, a DTC will set.