Grand Cherokee 4WD L6-4.0L VIN S (1997)
Throttle Position Sensor: Testing and Inspection
Component Test
THROTTLE POSITION SENSOR (TPS)
Fig. 58 Sensors
To perform a complete test of the Throttle Position Sensor (TPS) (Fig. 58) and its circuitry, refer to Powertrain Management/Computers and
Control Systems/Testing and Inspection.
See: Computers and Control Systems/Testing and Inspection
To test the TPS only, refer to the following:
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 0.350 millivolts and less than 900
millivolts. At wide open throttle, TPS output voltage must be less than 4.5 volts. The output voltage should increase gradually as the throttle
plate is slowly opened from idle to WOT.
