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Throttle Position Sensor (TPS): Adjustment

If resistance values are incorrect, loosen TPS hold-down screws and slowly rotate TPS until correct specification is obtained. If correct specification can not be obtained, replace TPS.

Fig 1: Throttle Valve Position for TPS Adjustment
G121586Courtesy of GENERAL MOTORS CORP.
THROTTLE POSITION SENSOR (TPS) RESISTANCE

Application Condition Resistance (Ohms)
Green & Black/White Wire
Throttle 1/3 Open No Continuity
Throttle Open:
A/T .015" (.38mm) Continuity
M/T .011" (.28mm) Continuity