Repair Instruction: Initialization: Description

PROCEDURES NECESSARY WHEN BATTERY TERMINAL IS DISCONNECTED / RECONNECTED

Necessary Procedures	Procedure Details	Effects / Inoperative Functions When Necessary Procedures are not Performed	Notes
Navigation system (for DVD) initialization	After turning the power switch ON (IG), insert the map disc.	Navigation system (for DVD)	If the map disc is inside when disconnecting the cable from the battery terminal, this procedure is not necessary
Correction of steering angle neutral point	Fully turn the steering wheel to the right and left.	Parking guidance function	-
Rear curtain position reset operation	Turn the power switch ON (IG). Push the front or rear switch's rear door sunshade switch twice.	Rear curtain	-
Reset power trunk lid system	Completely close the luggage compartment door by hand once.	Power trunk lid function	It is not necessary to perform initialization if the negative (-) battery cable is disconnected while the luggage compartment door is closed.

NOTE:

After the power switch is turned OFF, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the power switch OFF, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.

PROCEDURES NECESSARY WHEN ECU OR OTHER PARTS ARE REPLACED

Replacement Part	Necessary Procedures	Effects / Inoperative Functions When Necessary Procedures are not Performed	Notes
Hybrid vehicle control ECU	Perform clutch oil pressure value learning initialization Initialize radar cruise control system Register VIN	Large shift shock Radar cruise control system DTC P0630-804 is output	Perform initialization with power switch ON (READY), shift lever on P and vehicle stopped During learning operation, "T/M LEARNING" appears on meter's multi-information display
Hybrid vehicle transmission assembly	Perform clutch oil pressure value learning initialization	Large shift shock	Perform initialization with power switch ON (READY), shift lever on P and vehicle stopped During learning operation, "T/M LEARNING" appears on meter's multi-information display
Suspension control ECU Height control sensor	Vehicle height offset calibration	Vehicle height sensor data may be affected due to installation position, or vehicle height recognition may be erroneous	May also occur when vehicle height is uneven due to deterioration over time
Tire pressure warning ECU	Register transmitter IDs Initialize tire pressure warning system	When DTC detection conditions of "transmitter ID not received" DTC is met, TPMS indicator blinks for 1 minute, and then illuminates Tire pressure monitoring function	-
Tire pressure warning valve and transmitter	Register transmitter IDs Initialize tire pressure warning system	When DTC detection conditions of "transmitter ID not received" DTC is met, TPMS indicator blinks for 1 minute, and then illuminates Tire pressure monitoring function of replaced wheel	Even if only one wheel is replaced, IDs for all 5 wheels must be registered
Skid control ECU	Initialize linear solenoid valve and perform calibration Perform yaw rate and acceleration sensor zero point calibration	Brake warning light / yellow (minor malfunction) illumination Brake warning light / red (malfunction) ABS warning light illumination VSC warning display of multi-information display Master warning light illumination	-
Brake actuator	Bleed air Clear stored value of linear solenoid valve and calibration data Initialize linear solenoid valve and perform calibration	Brake does not operate properly	-
Brake pedal stroke sensor Brake pedal	Inspect and adjust brake pedal height Adjust brake pedal stroke sensor Clear stored value of linear solenoid valve and calibration data Initialize linear solenoid valve and perform calibration	Brake warning light / yellow (minor malfunction) illumination Brake warning light / red (malfunction) ABS warning light illumination Master warning light illumination	-
Yaw rate and acceleration sensor	Clear zero point calibration data Perform yaw rate and acceleration sensor zero point calibration	Brake warning light / yellow (minor malfunction) illumination Brake warning light / red (malfunction) ABS warning light illumination VSC warning display of multi-information display Master warning light illumination VSC control is prohibited or operation is incorrect VGRS system	-
Electric parking brake ECU	Reset memory Acquire tension sensor zero point	Electric parking brake does not operate normally	-
Electric parking brake actuator	Reset memory Acquire tension sensor zero point Parking brake bedding	Electric parking brake does not operate normally Parking brake performance may not be normal	-
Rear disc Parking brake shoe	Parking brake bedding	Parking brake performance may not be normal	-
Steering control ECU Steering column Steering intermediate shaft	Actuator angle neutral point calibration and initialization	Steering wheel off-center	-
Power steering gear assembly	Actuator angle neutral point calibration and initialization Rotation angle sensor value initialization Torque sensor zero point calibration VGRS system calibration procedure	Steering wheel off-center Difference in amount of steering assist between left and right	-
Power steering ECU	Rotation angle sensor value initialization Torque sensor zero point calibration	Steering wheel off-center Difference in amount of steering assist between left and right	-
Occupant classification ECU	Perform zero point calibration Registration ECU data	Occupant classification system Passenger airbag ON/OFF indicator Airbag system (Front passenger side) Seat belt warning system (Front passenger side)	-
ID code box Steering lock ECU ECM Key Certification ECU	Registration	Wireless door lock operation Entry operation Engine starting Steering unlock	-
Front millimeter wave radar sensor	Adjust front millimeter wave radar sensor	DTC C1A11 or C1A14 is output	-
Steering angle sensor connector	Correction of steering angle neutral point	Parking guidance function	-
Television camera	Television camera optical axis (Camera position setting)	Vehicle width extension lines and expected course are deviated	-
Parking assist ECU	Correction of steering angle neutral point Store left and right maximum steering angle Television camera optical axis (Camera position setting)	Vehicle width extension lines and expected course are deviated Parking assist function	-
Mayday ECU	Mayday ECU initialization Mayday ECU registration / enrollment	LEXUS link system	-
Mayday battery	Mayday battery registration Mayday battery confirmation	DTC 6-1 remains output	-
Power window regulator motor (All doors)	Initialize power window control system	AUTO UP / DOWN Jam protection Key-off	When the battery is replaced, it is not necessary to initialize the power window regulator motor
Inner rear view mirror	Compass zone setting Compass calibration	Direction is not displayed correctly	-
Front power seat switch (Seat ECU) Front seat adjuster Position control ECU Rear seat adjuster	Position sensor initialization	During manual operation, buzzer sounds Memory function does not operate Interference stop control does not operate normally Linked control does not operate normally	-
RR MPX-B1 fuse Luggage closer motor assembly Luggage door closer assembly	Reset power trunk lid system	Power trunk lid function	-
Rear door ECU LH Rear door ECU RH	Rear curtain position reset operation	Rear curtain	-
Sliding roof drive gear (Sliding roof ECU) Sliding roof housing Sliding roof glass	Initialize sliding roof system	Auto operation Jam protection function Sliding roof operation after power switch is turned OFF Wireless door lock control function Key-linked operation function (Driver's door only) Entry lock switch-linked operation	-