LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2021 >> WRX STI >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (2.5L) >> Throttle Body >> Inspection >> Throttle Sensor Inspection (Method With Circuit Tester)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Throttle Sensor Inspection (Method With Circuit Tester)

NOTE: Individual difference of the accelerator pedal may not be corrected sufficiently on the ECM side after DTCs were cleared or the battery was removed and installed on the vehicle. Therefore, when the reference voltage is not reached after following the procedure, repeat the ignition switch ON (engine OFF) and ignition switch OFF operations 40 times at intervals of three seconds or more, and then measure the voltage again.
  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.
    G13639964Courtesy 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.
scientia non olet · About LEMON Manuals