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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 terminals C7 (positive) and C14 (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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