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Home >> Acura >> 1990 >> Integra LS, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Throttle Angle Sensor
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Throttle Angle Sensor

  1. Disconnect 3P connector from throttle angle sensor on intake throttle body. Turn ignition on, measure voltage between Yellow/White (positive) wire and Green (negative) wire terminals.
  2. If voltage is about 5 volts, turn ignition off. Reconnect 3P connector at throttle angle sensor. Connect PGM-FI test harness connector between ECU and ECU wire harness. Using a hand-held vacuum pump, apply vacuum to dashpot diaphragm to hold diaphragm in retract position.
  3. If voltage is NOT approximately 5 volts, measure voltage between Yellow/White (positive) terminal and ground. If voltage is about 5 volts, repair open in Green wire between ECU terminal C12 and throttle angle sensor.
  4. Turn ignition on. Measure voltage between PGM-FI test harness connector terminals C7 (positive) and C12 (negative). Voltage should be about .3 volt with throttle valve at full-closed position, and 4.5 volts with throttle valve at full-open position. As throttle opens, voltage should change smoothly from .3 volt to 4.5 volts.
  5. If voltage is not as specified, check for short or open in Red/Blue wire between ECU terminal C7 and throttle angle sensor. Repair as necessary. If wire is okay, replace throttle angle sensor.
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