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Home >> Volvo >> 1987 >> 780 AW71 >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - BOSCH LH (Non Turbo) >> Testing >> Throttle Switch
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Throttle Switch

  1. Turn ignition off. Connect an ohmmeter between ground and terminal No. 3. Depress accelerator pedal. Meter should show zero ohms in idle position and infinite resistance in other positions.
  2. Connect ohmmeter between ground and terminal No. 12. Depress accelerator pedal. Meter should read zero ohms in full throttle position and infinite resistance in other positions.
  3. If any readings are incorrect, check throttle valve switch ground at intake manifold. If ground connection is correct, replace throttle valve switch.