Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2017 Subaru WRX STIFACTORY OEM SERVICE PROCEDURE

Check Accelerator Pedal Sensor Area (Method With Circuit Tester)

Remove the glove box. <Ref. to REMOVAL , Glove Box.>
Turn the ignition switch to ON. (engine OFF)

Measure the voltage between ECM connector terminals.

Main sensor side

Fig 1: Checking Accelerator Pedal Sensor Area Connector - Main Sensor Side
Courtesy of SUBARU OF AMERICA, INC.
Sub sensor side

Fig 2: Checking Accelerator Pedal Sensor Connector - Sub Sensor Side

Courtesy of SUBARU OF AMERICA, INC.

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

After inspection, install the related parts in the reverse order of removal.

Factory Service Tools

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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.