PROCEDURES NECESSARY WHEN ECU OR OTHER PARTS ARE REPLACED

Replacement Part	Necessary Procedure	Effect / Inoperative Function when Necessary Procedures are not Performed	See
ECM	Vehicle Identification Number (VIN) registration	MIL comes on	Refer to REGISTRATION for 2AZ-FE Refer to REGISTRATION for 2ZR-FE
ECM	ECU communication ID registration	Engine start	Refer to REGISTRATION
Automatic transaxle assembly* Engine assembly* ECM*	Reset memory	Large shift shock The deterioration of fuel efficiency	Refer to INITIALIZATION for U140F Refer to INITIALIZATION for U250E Refer to INITIALIZATION for U341E
Tire pressure warning ECU	Register transmitter IDs Initialize tire pressure warning system	When DTC detection conditions of "transmitter ID not received" DTC are met, TPWS indicator blinks for 1 minute, and then illuminates. Tire pressure monitoring function	Refer to INITIALIZATION for initialization Refer to REGISTRATION for registration
Tire pressure warning valve and transmitter	Register transmitter IDs Initialize tire pressure warning system	When DTC detection conditions of "transmitter ID not received" DTC are met, TPWS indicator blinks for 1 minute, and then illuminates. Tire pressure monitoring function of replaced wheel
Brake actuator assembly (Skid control ECU)	Perform yaw rate and acceleration sensor zero point calibration	Slip indicator light comes on VSC disabled or malfunctioning	Refer to CALIBRATION for 2AZ-FE Refer to CALIBRATION for 2ZR-FE
Yaw rate and acceleration sensor	Clear zero point calibration data Perform yaw rate and acceleration sensor zero point calibration	Slip indicator light comes on VSC disabled or malfunctioning
Power steering ECU Power steering link assembly	Perform rotation angle sensor initialization and torque sensor zero point calibration	P/S warning light comes on EPS control	Refer to CALIBRATION
Transponder key ECU	Key code registration ECU communication ID registration	Engine start	Refer to REGISTRATION
Key	Key code registration	Engine start	Refer to REGISTRATION
Door control transmitter Door control receiver	Refer to wireless door lock control system "REGISTRATION" procedures	Wireless door lock control system	Refer to REGISTRATION
Front seat cushion assembly (w/ occupant classification ECU, occupant classification sensor)	Perform zero point calibration Sensitivity check	Occupant classification system Passenger airbag ON/OFF indicator Airbag system (Front passenger side) Seat belt warning system (Front passenger side)	Refer to INITIALIZATION
Sliding roof drive gear sub-assembly (Sliding roof ECU) Sliding roof housing	Perform sliding roof drive gear reset	Automatic open/close function of roof glass Jam protection function Operation function after ignition switch off	Refer to INITIALIZATION

*: for U140F, U250E, U341E Automatic Transaxle

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.

Safety Warning

Repair Instruction: Initialization: Initialization

Use the Manual With the Right Hardware

When to See a Mechanic

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