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
Engine Control Module: Service and Repair
ENGINE CONTROL MODULE (ECM)
REMOVAL
1. Disconnect the ground cable from battery.
2. Remove the glove box lower cover.
3. Remove the lower inner trim of passenger's side.
4. Turn over the floor mat of passenger's seat.
5. Remove the protect cover.
6. Remove the nuts and bolts which hold the ECM to the bracket.
7. Disconnect the ECM connectors, and take out the ECM.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
- When the ECM of model with immobilizer has been replaced, be sure to perform the registration of immobilizer system. (Refer to "PC application help for Subaru Select Monitor".)
- If replacing ECM or the bracket, replace both parts with new parts at a time.
- After installing the bracket to ECM, do not separate the bracket.
- If the bracket has been installed to ECM in the wrong direction, replace both parts to new parts.
NOTE: When replacing the ECM, be careful not to use the wrong spec. ECM to avoid any damage on the fuel injection system.
Tightening torque: 7.5 N.m (0.8 kgf-m, 5.5 ft-lb)
REMOVAL
1. Disconnect the ground cable from battery.
2. Remove the glove box lower cover.
3. Remove the lower inner trim of passenger's side.
4. Turn over the floor mat of passenger's seat.
5. Remove the protect cover.
6. Remove the nuts and bolts which hold the ECM to the bracket.
7. Disconnect the ECM connectors, and take out the ECM.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
- When the ECM of model with immobilizer has been replaced, be sure to perform the registration of immobilizer system. (Refer to "PC application help for Subaru Select Monitor".)
- If replacing ECM or the bracket, replace both parts with new parts at a time.
- After installing the bracket to ECM, do not separate the bracket.
- If the bracket has been installed to ECM in the wrong direction, replace both parts to new parts.
NOTE: When replacing the ECM, be careful not to use the wrong spec. ECM to avoid any damage on the fuel injection system.
Tightening torque: 7.5 N.m (0.8 kgf-m, 5.5 ft-lb)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.