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Home >> Jeep >> 2014 >> Compass Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 ((Transmission Control Module (TCM) - Electrical Diagnostics - CVT Automatic Transmission)) >> DTC Troubleshooting >> P1661-Sensor Ground Reference Circuit >> Theory Of Operation

Theory Of Operation

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The Oil Temperature Sensor, Primary and Secondary Oil Pressure Sensor and the Input Speed Sensor use a common ground circuit that returns to the Transmission Control Module (TCM). If all of these circuits show an open (high voltage) the DTC will set.