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.
Diagnostic Test
- CHECK ECM PART NUMBER
Check ECM part number to see whether it is blank ECM or not.
NOTE:- Part number of blank ECM is 23703 - *****.
- Check the part number when ordering ECM or with the one included in the label on the container box.
Is the ECM a blank ECM?
YES
GO TO STEP 2 .
NO
GO TO STEP 4 .
- SAVE ECM PART NUMBER
Read out the part number from the old ECM and save the number, following the programming instructions. Refer to "CONSULT Operation Manual".
NOTE:- The ECM part number is saved in CONSULT.
- Even when ECM part number is not saved in CONSULT, GO TO STEP 3 .
GO TO STEP 3 .
- PERFORM ECM PROGRAMMING
After replacing ECM, perform the ECM programming. Refer to "CONSULT Operation Manual".
NOTE:- Refer to REMOVAL AND INSTALLATION for replacement of ECM.
- During programming, maintain the following conditions:
- Ignition switch: ON
- Electric load: OFF
- Brake pedal: Not depressed
- Battery voltage: 12 - 13.5 V (Be sure to check the value of battery voltage by selecting "BATTERY VOLT" in "Data monitor" of CONSULT.)
GO TO STEP 4 .
- REPLACE ECM
Replace ECM. Refer to REMOVAL AND INSTALLATION .
GO TO STEP 5 .
- PERFORM VIN REGISTRATION
Refer to DESCRIPTION .
GO TO STEP 6 .
- PERFORM INITIALIZATION OF NATS SYSTEM AND REGISTRATION OF ALL NATS IGNITION KEY IDS
Refer to DESCRIPTION (with I-Key), DESCRIPTION (without I-Key).
GO TO STEP 7 .
- PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Refer to DESCRIPTION .
GO TO STEP 8 .
- PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Refer to DESCRIPTION .
GO TO STEP 9 .
- PERFORM IDLE AIR VOLUME LEARNING
Refer to DESCRIPTION .
END
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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.