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Home >> Subaru >> 2009 >> Impreza WRX STi >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Speed Control Systems (STI) >> Accelerator Pedal >> Inspection >> Accelerator Pedal Sensor (Method With Circuit Tester)
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Accelerator Pedal Sensor (Method With Circuit Tester)

  1. Remove the lower inner trim of passenger's side. Ref. to REMOVAL , Lower Inner Trim.
  2. Turn over the floor mat of passenger's seat.
  3. Remove the protect cover.
    Fig 1: Locating Protect Cover Bolts
    G05659489Courtesy of SUBARU OF AMERICA, INC.
  4. Remove the nuts and bolts which hold the ECM to the bracket.
    Fig 2: Locating ECM Bracket Bolts And Nuts
    G05659490Courtesy of SUBARU OF AMERICA, INC.
  5. Turn the ignition switch to ON. (engine OFF)
  6. Measure the voltage between ECM connector terminals.
    • Main sensor side
      Fig 3: Measuring Voltage Between ECM Connector Terminals (Main Sensor Side)
      G06345446Courtesy of SUBARU OF AMERICA, INC.
    • Sub sensor side
      Fig 4: Measuring Voltage Between ECM Connector Terminals (Sub Sensor Side)
      G06345447Courtesy of SUBARU OF AMERICA, INC.
      ACCELERATOR PEDAL SPECIFICATION

      Accelerator pedal sensor Accelerator pedal Terminal No. Standard
      Main Not depressed (Full closed) 23 (+) and 29 (-) 0.4 - 1.0 V
      Depressed (Full opened) 2.4 - 3.7 V
      Sub Not depressed (Full closed) 31 (+) and 30 (-) 0.3 - 1.1 V
      Depressed (Full opened) 2.3 - 3.8 V