2015 Subaru Outback 2.5iFACTORY OEM SERVICE PROCEDURE

Throttle Sensor (Method With Circuit Tester)

  1. Disconnect the ground terminal from battery sensor. <Ref. to BATTERY , NOTE, Repair Contents.>
  2. While pressing the section (A) shown in the figure, move the lock lever (B) in the direction of the arrow to disconnect the connectors from the ECM in numerical order as shown in the figure.
    Fig 1: Moving Lock Lever
    G10262110Courtesy of SUBARU OF AMERICA, INC.
  3. Attach the ST between the ECM, engine harness and the bulkhead wiring harness. <Ref. to CAUTION , General Description.>

    ST 18460AA050 CHECK BOARD

  4. Connect the ground terminal to battery sensor. <Ref. to BATTERY , NOTE, Repair Contents.>
  5. Turn the ignition switch to ON. (Engine OFF)
  6. Measure the voltage between ECM connector terminals using ST.
    Fig 2: Measuring Voltage Between ECM Connector Terminals
    G10262111Courtesy of SUBARU OF AMERICA, INC.
    Throttle sensor Accelerator pedal Terminal No. Standard
    Main Not depressed (full closed) 29 (+) and 34 (-) Approx. 0.6 - 1.2 V
    Depressed (full opened) Approx. 3.8 - 4.4 V
    Sub Not depressed (full closed) 31 (+) and 34 (-) 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.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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