RAM 2500 Truck 2WD L6-359 5.9L DSL Turbo VIN D FI (1997)
Throttle Position Sensor: Adjustments
The throttle position sensor (TPS) is used on diesel powered engines only when equipped with an automatic transmission and/or an Exhaust Gas
Recirculation (EGR) system. If the TPS is to be replaced on a diesel engine, it must be tested/adjusted after replacement.
THROTTLE POSITION SENSOR TESTING & ADJUSTMENT
CAUTION: Before attempting to test TPS, verify linkage adjustment dimension. This dimension MUST be 126.5 mm (5.0 inches) BEFORE testing.
For linkage adjustment procedures, refer to Throttle Linkage Adjustment-Diesel Engine.
CAUTION: Before testing TPS, verify that engine is set at correct low idle speed. Refer to Idle Speed Adjustment.
1. After confirming correct linkage adjustment and idle speed, proceed to the following:
2. Attach a paper clip into center terminal of TPS electrical connector. Do not remove connector from TPS for this test.
3. Attach positive lead of a voltmeter to this paper clip and negative lead to a good ground.
4. Turn ignition switch to ON position. Do not start engine.
5. The voltage at TPS center terminal should be 1.0 volt (+/- 0.2 volt) with linkage at idle position. At wide open throttle (WOT), output voltage
must be 2.2-to-2.9 volts higher than at idle speed. If voltage is not correct, proceed to adjusting linkage.
