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Home >> Saab >> 1992 >> 9000 S, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Throttle Position Sensor
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Throttle Position Sensor

  1. Turn ignition off. Unplug connector from throttle position sensor, located on throttle body. Connect ohmmeter to terminals No. 1 and 3 on sensor. At idle position, resistance should be 2600-3000 ohms. At full throttle, resistance should be 1100-1500 ohms. Replace throttle position sensor if resistance is not within specification.
  2. Turn ignition on. Measure voltage between terminal No. 1 (Green/Red wire) of throttle position sensor harness connector and a good engine ground. If voltage is not 5 volts, check Green/Red wire (between harness connector and ECU pin No. 10) for opens or shorts to ground.
  3. Turn ignition off. Check for continuity between terminal No. 2 (Black/White wire) of throttle position harness connector and a good ground. Repair Black/White wire if there is no continuity.
  4. Reconnect wiring to sensor. Turn ignition on. Measure voltage between sensor terminal No. 2 (Black wire) and a good ground. At idle position, voltage should be about .2 volt.
  5. With accelerator pedal in full throttle position, voltage should be about 4 volts. Replace throttle position sensor if voltage or resistance is not within specifications.
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