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 Module (ECM): Installation
- When replacing the ECM, be sure to perform [Entry VIN] after the service. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>WORK SUPPORT .
- When the ECM of model with immobilizer has been replaced, be sure to perform the registration of immobilizer system.
- Model without keyless access with push button start
For models without immobilizer control module, refer to "Type B" described in "REGISTRATION MANUAL FOR IMMOBILIZER".
- For models with immobilizer control module, refer to "Type E" described in "REGISTRATION MANUAL FOR IMMOBILIZER".
- Model with keyless access with push button start
Refer to "Type D" described in "REGISTRATION MANUAL FOR IMMOBILIZER".
- Model without keyless access with push button start
Use the Manual With the Right Hardware
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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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