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
Work Procedure (Before Replacing ECM)
- SAVE ECM DATA
With CONSULT
- Turn ignition switch OFF.
- Reconnect all harness connectors disconnected.
- Turn ignition switch ON.
- Select "Replace ECU" of "ECM" using CONSULT.
- Follow the instruction of CONSULT display.
NOTE:- ECM data is saved to CONSULT.
>>
Replace ECM.
Work Procedure (After Replacing ECM)
- WRITING VEHICLE SPECIFICATION
With CONSULT Perform writing vehicle specification to ECM according to "Replace ECU" in CONSULT Operation Manual.
CAUTION:During programming, maintain the following conditions:
- Ignition switch: ON
- Electric load: OFF
- Brake pedal: Not depressed
- Battery voltage: 12 - 13.5 V (Check the value displayed on the CONSULT screen).
>>
GO TO 2
.
- PERFORM INITIALIZATION OF IVIS (NATS) SYSTEM AND REGISTRATION OF ALL IVIS (NATS) IGNITION KEY IDS
Refer to Work Procedure .
>>
GO TO 3
.
- 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 4
.
NO>>
GO TO 5
.
- WRITE ECM DATA
With CONSULT
- Select "WRITING DATA FOR REPLC CPU" in "WORK SUPPORT" mode of "ENGINE" using CONSULT.
- Follow the instruction of CONSULT display.
NOTE:The data saved by "SAVING DATA FOR REPLC CPU" is written to ECM.
>>
GO TO 5
.
- PERFORM VIN REGISTRATION
Refer to Description .
>>
GO TO 6
.
- WRITING MAC KEY FOR ECM
Refer to Description .
>>
GO TO 7
.
- PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Refer to Description .
>>
GO TO 8
.
- PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Refer to Description .
>>
GO TO 9
.
- PERFORM TURBOCHARGER WASTEGATE CONTROL SOLENOID VALVE DATA INITIALIZATION
Refer to Description .
>>
GO TO 10
.
- PERFORM ELECTRIC INTAKE VALVE TIMING CONTROL LEARNING
Refer to Description .
>>
GO TO 11
.
- PERFORM INJECTOR OFFSET LEARNING
Refer to Description .
>>
GO TO 12
.
- PERFORM IDLE AIR VOLUME LEARNING
Refer to Description .
>>
GO TO 13
.
- PERFORM VCR BASE POSITION LEARNING
Refer to Description .
>>
GO TO 14
.
- CHANGE ENGINE OIL
Change engine oil, then perform ENGINE OIL DATE RESET. Refer to Description .
NOTE:When replacing ECM, OCS data cannot be transferred. In addition, ENGINE OIL DATE RESET is performed, and therefore oil change is required.
>>
GO TO 15
.
- ERASE DTC
With CONSULT
- 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
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra 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.