RAM 1500 Truck 2WD V6-3.9L VIN X (1999)
Throttle Position Sensor: Testing and Inspection
To perform a complete test of the TPS and its circuitry, refer to the DRB scan tool and appropriate Powertrain Diagnostics Procedures. To test the TPS
only, refer to the following:
TPS
The TPS can be tested with a digital voltmeter. The center terminal of the TPS is the output terminal.
With the ignition key in the ON position, check the TPS output voltage at the center terminal wire of the connector. Check this at idle (throttle plate
closed) and at wide open throttle (WOT). At idle, TPS output voltage should be greater than 0.26 volts and less than 0.95 volts. At wide open throttle,
TPS output voltage must be less than 4.49 volts. The output voltage should increase gradually as the throttle plate is slowly opened from idle to WOT.
