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Home >> Eagle >> 1991 >> Summit Base, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Throttle Position Sensor (TPS) >> TPS Adjustment >> Test No. 1

Test No. 1

  1. Turn ignition on for more than 15 seconds. DO NOT  start engine. Turn ignition off. ISC plunger should be retracted fully.
  2. Ensure ISC plunger is in fully retracted position. Disconnect harness connector(s) from ISC motor. Turn ignition on. DO NOT  start engine.
  3. 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. Note TPS output voltage.
  4. If output voltage is .48-.52 volt, go to step 6). If output voltage is not .48-.52 volt, loosen TPS mounting screw(s) and rotate TPS clockwise, or counterclockwise, until output voltage is within specification. Tighten TPS mounting screws.
  5. Turn ignition off. Reconnect harness connector(s) at ISC motor. Start engine. Ensure engine idles within curb idle speed specification.
  6. Turn ignition off. Disconnect negative battery cable for at least 15 seconds to clear diagnostic trouble code. Reconnect negative battery cable. Operate engine at idle for about 5 minutes to ensure engine idles smoothly.
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