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Throttle Sensor (Method With Circuit Tester)

  1. Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
  2. Disconnect the connector from ECM in numerical order as shown in the figure.
    Fig 1: Locating ECM Connectors
    G11252779Courtesy of SUBARU OF AMERICA, INC.
  3. Attach the ST between the ECM, engine wiring harness and the bulkhead wiring harness. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>General Description>PREPARATION TOOL>HOW TO USE CHECK BOARD .>

    Special Tool: 

    CHECK BOARD (18460AA120)

  4. Connect the battery ground terminal. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
  5. Turn the ignition switch to ON. (Engine OFF)
  6. Measure the voltage between ECM connector terminals.
    Fig 2: Identifying ECM Connector Terminals
    G11252780Courtesy of SUBARU OF AMERICA, INC.
    Throttle sensor Accelerator pedal Terminal No. Standard
    Main Not depressed (full closed) 29 (+) and 30 (-) Approx. 0.6 - 1.2 V
    Depressed (full opened) Approx. 3.8 - 4.4 V
    Sub Not depressed (full closed) 43 (+) and 30 (-) Approx. 1.4 - 2.0 V
    Depressed (full opened) Approx. 4.0 - 4.6 V
  7. After inspection, install the related parts in the reverse order of removal.
    NOTE: For installation procedures of ECM connectors, refer to Engine Control Module (ECM). Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Engine Control Module (ECM)>INSTALLATION .
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