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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 .
  2. Remove the lower inner trim of passengers side. Refer to REMOVAL .
  3. Turn over the floor mat of passenger's seat.
  4. Remove the protect cover.
    Fig 1: Locating Protecting Cover Mounting Screws
    G08538832Courtesy of SUBARU OF AMERICA, INC.
  5. Remove the nuts and bolts which hold the ECM to the bracket.
    Fig 2: Locating ECM Mounting Nuts
    G08538833Courtesy of SUBARU OF AMERICA, INC.
  6. Turn the ignition switch to ON. (engine OFF)
  7. Check the voltage between ECM connector terminals.
    Fig 3: Measuring Voltage Between ECM Connector Terminals
    G07662677Courtesy 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.
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