P1C99 CHRYSLER - Gear Shift Position Sensor 1 Circuit
- Faulty Gear Shift Position Sensor 1
- Gear Shift Position Sensor 1 harness is open or shorted
- Gear Shift Position Sensor 1 circuit poor electrical connection
- Faulty Transmission Control Module (TCM)
- Engine Light ON (or Service Engine Soon Warning Light)
P1c99 Chrysler DescriptionThis diagnostic compares the output signal of the sensor to threshold values of normal operations. When the signal is out of range the diagnostic will be considered failing. The sensor is mounted next to the 1st - 3rd gear engagement actuator to detect a linear movement of the piston. For this purpose, a permanent magnet is mounted on the piston which is moved over a complete travel stroke. The magnet position generates a saturation area in the internal ferromagnetic core of the sensor which is transformed to an output position signal. The sensor provides an output signal with Pulse Width Modulation (PWM) at a fixed frequency and duty cycle proportional to the piston position of the actuator.
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