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Home >> Subaru >> 2017 >> Forester 2.5i, Eng CD FB25BA, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (H4DO) >> Throttle Body >> Inspection >> Throttle Sensor (Method With Circuit Tester)
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Throttle Sensor (Method With Circuit Tester)

  1. Disconnect the ground terminal from battery sensor. Ref. to NOTE>NOTE>BATTERY .
  2. Remove the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Engine Control Module (ECM)>REMOVAL .
  3. Attach the ST between the ECM and bulkhead wiring harness. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>General Description>CAUTION .

    ST 18460AA050 CHECK BOARD 

  4. Connect the ground terminal to battery sensor. Ref. to NOTE>NOTE>BATTERY .
  5. Turn the ignition switch to ON. (Engine OFF)
  6. Measure the voltage between ECM connector terminals using ST.
    Fig 1: Measuring Voltage Between ECM Connector Terminals
    G11263282Courtesy 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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