Viper GTS V10-8.0L VIN E (1999)
Throttle Position Sensor: Description and Operation
THROTTLE POSITION SENSOR - PCM INPUT
Throttle Position Sensor
The TPS is mounted on the drivers side throttle body. The sensor connects to the throttle blade shaft.
The fuel injection system uses only one Throttle Position Sensor (TPS). The TPS is a variable resistor that provides the PCM with an input signal
(voltage). The signal represents throttle blade position. As the position of the throttle blade changes, the resistance of the TPS changes.
The PCM supplies approximately 5 volts to the TPS. The TPS output voltage (input signal to the PCM) represents throttle blade position. The
TPS output voltage to the PCM varies from approximately 0.5 volt at minimum throttle opening (idle) to 3.5 volts at wide open throttle. Along
with inputs from other sensors, the PCM uses the TPS input to determine current engine operating conditions. The PCM also adjusts fuel injector
pulse width and ignition timing based on these inputs.
