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Home >> Subaru >> 2019 >> WRX STI >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (STI) >> Throttle Body >> Inspection >> Throttle Sensor Inspection (Method With Circuit Tester)
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Throttle Sensor Inspection (Method With Circuit Tester)

  1. Remove the glove box. Refer to EXTERIOR/INTERIOR TRIM>GLOVE BOX>REMOVAL .
  2. Start and warm up the engine.
  3. Measure the voltage between ECM connector terminals at idling.
    G13257294Courtesy of SUBARU OF AMERICA, INC.
    Throttle sensor Accelerator pedal Terminal No. Standard
    Main Not depressed (full closed) 18 (+) and 29 (-) Approx. 0.6 V
    Depressed (full opened) Approx. 4.0 V
    Sub Not depressed (full closed) 28 (+) and 29 (-) Approx. 1.48 V
    Depressed (full opened) Approx. 4.17 V
  4. After inspection, install the related parts in the reverse order of removal.