Check Accelerator Pedal Sensor Area (Method With Circuit Tester)

Disconnect the ground terminal from battery sensor. Refer to NOTE>NOTE>BATTERY .
Remove the ECM. Refer to FUEL INJECTION (FUEL SYSTEMS) (W/O STI)>ENGINE CONTROL MODULE (ECM)>REMOVAL .
Install the ST between the ECM and bulkhead harness and the engine wiring harness. Refer to ENGINE (DIAGNOSTICS) (W/O STI)>GENERAL DESCRIPTION>CAUTION .
ST 18460AA030 CHECK BOARD
Connect the ground terminal to battery sensor. Refer to NOTE>NOTE>BATTERY .
Turn the ignition switch to ON. (Engine OFF)

Measure the voltage between ECM connector terminals using ST.

Main sensor side

Courtesy of SUBARU OF AMERICA, INC.

Courtesy of SUBARU OF AMERICA, INC.

Accelerator pedal sensor	Accelerator pedal	Terminal No.	Standard
Main	Not depressed (full closed)	17 (+) and 31 (-)	0.4 - 1.0 V
Main	Depressed (full opened)	17 (+) and 31 (-)	2.4 - 3.7 V
Sub	Not depressed (full closed)	29 (+) and 19 (-)	0.4 - 1.0 V
Sub	Depressed (full opened)	29 (+) and 19 (-)	2.4 - 3.7 V