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Throttle Position Sensor

  1. Disconnect electrical connector at throttle position sensor, located on side of throttle body. Connect ohmmeter leads to terminals IDL (Blue wire) and E2 (Brown wire) of throttle position sensor. See Fig 1 .
  2. Insert a .014" (.35 mm) feeler gauge between throttle stop screw and stop lever. Ensure continuity now exists. Remove feeler gauge. Insert a .023" (.58 mm) feeler gauge between throttle stop screw and stop lever. Ensure no continuity now exists.
  3. If continuity is not as specified, it may be necessary to loosen retaining screws and rotate throttle position sensor until continuity is as specified. Tighten retaining screws. Replace throttle position sensor if proper continuity cannot be obtained.
Fig 1: Checking Throttle Position Sensor
G93I24297Courtesy of GENERAL MOTORS CORP.
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