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.
Work Procedure
- SAVE ECM DATA
With CONSULT
- Turn ignition switch OFF.
- Reconnect all harness connectors disconnected.
- Turn ignition switch ON.
- On CONSULT screen, select "ENGINE">>"Work support">>"SAVING DATA FOR REPLC CPU".
- Follow the instruction of CONSULT display.
NOTE:- Necessary data in ECM is copied and saved to CONSULT.
- Go to Step 2 regardless of with or without success in saving data.
GO TO 2.
- 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 - xxxxx.
- Check part number when ordering ECM or the one included in the label on the container box.
Is the ECM a blank ECM?
YES
GO TO 3.
NO
GO TO 5.
- 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 4.
GO TO 4.
- 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 6.
- REPLACE ECM
Replace ECM. Refer to Removal and Installation .
GO TO 6.
- PERFORM INITIALIZATION OF NVIS (NATS) SYSTEM AND REGISTRATION OF ALL NVIS (NATS) IGNITION KEY IDS
Refer to Description .
GO TO 7.
- CHECK ECM DATA STATUS
Check if the data is successfully copied from the ECM at Step 1 (before replacement) and saved in CONSULT.
Is the data saved successfully?
YES
GO TO 8.
NO
GO TO 9.
- WRITE ECM DATA
- On CONSULT screen, select "ENGINE">>"Work support">>"WRITING DATA FOR REPLC CPU".
- Follow the instruction of CONSULT display.
NOTE: The data saved by "SAVING DATA FOR REPLC CPU" is written to ECM.GO TO 10.
- PERFORM VIN REGISTRATION
Refer to Description .
GO TO 10.
- PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Refer to Description .
GO TO 11.
- PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Refer to Description .
GO TO 12.
- ELECTRIC INTAKE VALVE TIMING CONTROL ACTUATOR REFERENCE POSITION LEARNING
Refer to Description .
GO TO 13.
- PERFORM IDLE AIR VOLUME LEARNING
Refer to Description .
GO TO 14.
- ERASE DTC
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Check "Self-diagnostic result" of "ENGINE".
Is any DTC detected?
YES
Erase DTC.
NO
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.
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