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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 ((Transmission Control Module (TCM) - Electrical Diagnostics - As68RC Automatic Transmission)) >> Diagnosis and Testing >> P0708-Transmission Range Sensor Circuit High >> Theory of Operation

Theory of Operation

WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The Transmission Range Sensor (TRS) is a multiple position selector switch which changes the signal path by redirecting a 12-volt signal source to seven different TRS signal circuits (P, R, N, D, 3, 2, 1) and also houses a Park/Neutral (P/N) switch circuit. These circuits are monitored by the Transmission Control Module and used in conjunction with various pressure switches to validate proper operation of the transmission and diagnose any possible problem. In a normal operating mode, pressure switch 8, is in an "Open" state in P, R, or N. and in an "Closed" state in any forward gear (engine running).

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