NOTE: Individual difference of the accelerator pedal may not be corrected sufficiently on the ECM side after DTCs were cleared or the battery was removed and installed on the vehicle. Therefore, when the reference voltage is not reached after following the procedure, repeat the ignition switch ON (engine OFF) and ignition switch OFF operations 40 times at intervals of three seconds or more, and then measure the voltage again.

Remove the glove box lid assembly. Refer to REMOVAL .
Turn the ignition switch to ON. (engine OFF)

Measure the voltage between ECM connector terminals.

Fig 1: Measuring Voltage Between ECM Connector Terminals

Courtesy of SUBARU OF AMERICA, INC.

Throttle sensor	Accelerator pedal	Terminal No.	Standard
Main	Not depressed (Full closed)	18 (+) and 1 (-)	Approx. 0.6 V
Main	Depressed (Full opened)	18 (+) and 1 (-)	Approx. 4.04 V
Sub	Not depressed (Full closed)	28 (+) and 1 (-)	Approx. 1.48 V
Sub	Depressed (Full opened)	28 (+) and 1 (-)	Approx. 4.23 V

Start the engine.
Measure the voltage between ECM connector terminals when accelerator pedal is fully open.
CAUTION: When depressing the accelerator pedal to fully open, perform it in as short a time as possible, but within the range where the inspection result is not adversely affected.

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.

Safety Warning

Throttle Sensor (Method With Circuit Tester)

Use the Manual With the Right Hardware

When to See a Mechanic

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