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.
2012 Subaru Forester F4-2.5L DOHCFACTORY OEM SERVICE PROCEDURE
Accelerator Pedal Position Sensor: Testing and Inspection
ACCELERATOR PEDAL
INSPECTION
1. CHECK ACCELERATOR PEDAL SENSOR AREA (METHOD WITH CIRCUIT TESTER)
1. Remove the glove box lower cover.
2. Remove the lower inner trim of passenger's side.
3. Turn over the floor mat of passenger's seat.
4. Remove the protect cover.
5. Remove the nuts and bolts which hold the ECM to the bracket.
6. Turn the ignition switch to ON. (engine OFF)
7. Measure the voltage between ECM connector terminals.
Main sensor side
Sub sensor side
8. After inspection, install the related parts in the reverse order of removal.
Tightening torque: 7.5 N.m (0.8 kgf-m, 5.5 ft-lb)
2. CHECK ACCELERATOR PEDAL SENSOR AREA (METHOD WITH SUBARU SELECT MONITOR)
1. Turn the ignition switch to ON. (engine OFF)
2. Read the accelerator pedal opening angle signal and voltage of accelerator pedal sensor using Subaru Select Monitor. Subaru Select Monitor
3. OTHER INSPECTIONS
1. Check that the accelerator pedal does not have deformation, cracks or damage.
2. Check for smooth operation when the accelerator pedal is depressed.
3. Check if the accelerator pedal returns to its original position smoothly when the pedal is released.
INSPECTION
1. CHECK ACCELERATOR PEDAL SENSOR AREA (METHOD WITH CIRCUIT TESTER)
1. Remove the glove box lower cover.
2. Remove the lower inner trim of passenger's side.
3. Turn over the floor mat of passenger's seat.
4. Remove the protect cover.
5. Remove the nuts and bolts which hold the ECM to the bracket.
6. Turn the ignition switch to ON. (engine OFF)
7. Measure the voltage between ECM connector terminals.
Main sensor side
Sub sensor side
8. After inspection, install the related parts in the reverse order of removal.
Tightening torque: 7.5 N.m (0.8 kgf-m, 5.5 ft-lb)
2. CHECK ACCELERATOR PEDAL SENSOR AREA (METHOD WITH SUBARU SELECT MONITOR)
1. Turn the ignition switch to ON. (engine OFF)
2. Read the accelerator pedal opening angle signal and voltage of accelerator pedal sensor using Subaru Select Monitor. Subaru Select Monitor
3. OTHER INSPECTIONS
1. Check that the accelerator pedal does not have deformation, cracks or damage.
2. Check for smooth operation when the accelerator pedal is depressed.
3. Check if the accelerator pedal returns to its original position smoothly when the pedal is released.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.