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.
ECM neutralization procedure (With immobilizer)
- When replacing the ECM, the vehicle equipped with the immobilizer must be performed procedure as below.
[When installing an ECM with learning experience]
- Perform
"ECM Neutral Mode" procedure with diagnostic tool.
(Refer to Body Electrical System - "IMMOBILIZER SYSTEM ")
- After finishing "ECM Neutral Mode", perform
"Key teaching" procedure with diagnostic tool.
(Refer to Body Electrical System - "IMMOBILIZER SYSTEM ")
[A new ECM with no learning experience is installed.]
- Perform
"Key Teaching" procedure with diagnostic tool.
(Refer to Body Electrical System - "IMMOBILIZER SYSTEM ")
ECM Neutralization procedure (With smart key)
- When replacing the ECM, the vehicle equipped with the smart key system (Button start) must be performed procedure as below.
[When installing an ECM with learning experience]
- Perform
"ECM Neutral Mode" procedure with diagnostic tool.
(Refer to Body Electrical System - "SMART KEY ")
- After finishing "ECM Neutral Mode", Use a key (or press the start button) and turn it to the IGN ON and OFF position. Then the ECM learns the smart key information automatically.
(Refer to Body Electrical System - "SMART KEY ")
[A new ECM with no learning experience is installed.]
- Using the key or start button and turn it to the IGN ON and OFF position. Then the ECM learns the smart key information automatically.
(Refer to Body Electrical System - "SMART KEY ")
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.