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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 lower cover. < Refer to REMOVAL , Glove Box. >
  2. Remove the lower inner trim of passenger's side. < Refer to REMOVAL , Lower Inner Trim. >
  3. Turn over the floor mat of passenger's seat.
  4. Remove the protect cover.
    Fig 1: Locating Protect Cover Mounting Screws
    G05659489Courtesy of SUBARU OF AMERICA, INC.
  5. Remove the nuts and bolts which hold the ECM to the bracket.
    Fig 2: Locating ECM Bracket Mounting Bolt And Nut
    G05659490Courtesy of SUBARU OF AMERICA, INC.
  6. Turn the ignition switch to ON. (engine OFF)
  7. Measure the voltage between ECM connector terminals.
    Fig 3: Measuring Voltage Between ECM Connector Terminals
    G08570655Courtesy 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. 3.96 V
    Sub Not depressed (Full closed) 28 (+) and 29 (-) Approx. 1.48 V
    Depressed (Full opened) Approx. 4.17 V
  8. After inspection, install the related parts in the reverse order of removal.

    Tightening torque: 

    7.5 N.m (0.8 kgf-m, 5.5 ft-lb) 

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