RAM 2500 Truck 2WD L6-359 5.9L DSL Turbo VIN D FI (1997)
Throttle Position Sensor: Description and Operation
Throttle Position Sensor Location
DESCRIPTION
The TPS is a linear potentiometer. The PCM supplies 5 volts to the sensor. TPS output to the PCM varies from approximately 1.0 volt at idle to
3.5 volts at wide open throttle (WOT).
OPERATION
The Throttle Position Sensor (TPS) provides an input to the Powertrain Control Module (PCM). It senses how far the throttle is open (past the
idle position). The PCM uses the TPS input, along with vehicle speed sensor and engine speed sensor inputs to determine 3-4 upshift (overdrive)
and 4-3 downshift. It is also used with the vehicle speed sensor and engine speed sensor inputs to engage and disengage the torque convertor
solenoid. This solenoid is used for torque convertor engagement.
CIRCUIT OPERATION
From the Powertrain Control Module (PCM), circuit K6 supplies 5 Volts to the Throttle Position Sensor (TPS). Circuit K6 connects to cavity
A17 of the PCM.
Circuit K22 delivers the TPS signal to the PCM. Circuit K22 connects to cavity A23 of the PCM. Circuit K22 also splices to cavity 3 of the EGR
control module.
The PCM provides a ground for the TPS signal (circuit K22) through circuit K4. Circuit K4 connects to cavity A4 of the PCM.
