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.
Engine Control System: ECM: Replacement
- DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
- REMOVE ENGINE ROOM ECU COVER NOTE:
- Wipe water from the ECM cover and edges.
- Replacement of the ECM should be performed indoors, away from rain.
- Keep the inside of the ECM and its connectors/screws away from water.
- Remove the 3 bolts and ECM cover.
- REMOVE ECM
- Disconnect the 5 ECM connectors.
- Remove the 2 nuts and ECM.
- INSTALL ECM NOTE:
- After replacing the ECM, initialize it (see INITIALIZATION ).
- Check that no foreign objects are stuck inside the ECM box.
- Connect the connector and install the ECM with the 2 nuts.
Torque: 5.5 N.m (56 kgf.cm, 49 in.lbf)
- INSTALL ENGINE ROOM ECU COVER
- Install the ECM cover with the 3 bolts.
- CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
- PERFORM INITIALIZATION (See INITIALIZATION
) NOTE: Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.
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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.
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