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Home › Eagle › 1991 › Summit Base, 2D Hatchback, Standard › Repair and Diagnosis › Engine Performance › Engine Controls - Adjustments › Throttle Position Sensor (TPS) › TPS Adjustment › Test No. 4

Test No. 4

  1. Loosen throttle cable. Disconnect electrical connector from TPS. Connect digital ohmmeter between Green/White and Green/Yellow wire terminals of TPS electrical connector (on TPS side of harness).
  2. Insert .026" (.66 mm) feeler gauge between fixed Speed Adjusting Screw (SAS) and throttle lever. See Figure . Loosen TPS mounting screws. Rotate TPS fully clockwise. Check for continuity between Green/White wire and Green/Yellow wire terminals of TPS electrical connector.
  3. Rotate TPS counterclockwise until ohmmeter registers no continuity. Tighten TPS mounting screws and reconnect TPS electrical connector.
  4. Using digital voltmeter, backprobe terminal No. 19 (Green/White wire) and terminal No. 24 (Black or Green/Black wire) at Engine Control Unit (ECU) wiring harness connector. Turn ignition on. DO NOT  start engine. Check TPS output voltage.
  5. If TPS output voltage is 0.4-1.0 volt, go to step 6). If TPS output voltage is not 0.4-1.0 volt, check TPS and wiring harness for damage or malfunction. Replace TPS or repair wiring harness if necessary and go to next step.
  6. Remove feeler gauge. Turn ignition off. Disconnect voltmeter from ECU connector. Adjust throttle cable. Operate engine at idle for about 5 minutes to ensure engine idles smoothly and within specification.
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