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Home >> Toyota >> 1989 >> Tercel Base, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - 4-CYL CARBURETED >> Input Sensors & Switches Testing >> Throttle Position Switch >> Tercel
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Throttle Position Switch: Tercel

  1. Warm engine to operating temperature. Connect positive voltmeter lead to throttle position switch terminal (Red/Yellow wire) and negative lead to ground. Voltmeter should read battery voltage.
  2. Slowly increase engine RPM until voltmeter indicates 0 Volts. At 0 Volts, engine RPM should be between 1200-1600 RPM. If RPM is not as specified, adjust throttle position switch. For throttle position switch adjustment procedure, see ADJUSTMENTS article in this section
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