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Procedures necessary when battery terminal is disconnected/reconnected

PROCEDURE REFERENCE CHART

Necessary Procedures	Procedure Details	Effects/Inoperative Functions When Necessary Procedures are not Performed	Notes
ECM	Register VIN	DTC P0630 is output	-
Navigation system (for DVD) initialization	After turning the engine 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 engine 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 engine 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 engine 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

PROCEDURE REFERENCE CHART

Replacement Part	Necessary Procedures	Effects/Inoperative Functions When Necessary Procedures are not Performed	Notes
ECM	Register VIN	DTC P0630 is output	-
Automatic transmission assembly	Set transmission compensation code Learning by driving (Road test) Reset memory	Large shift shock Engine overruns	-
Valve body assembly Shift solenoid valve SL1, 2, 3, 4, 5	Learning by driving (Road test)	Large shift shock Engine overruns	-
TCM	Set transmission compensation code Learning by driving (Road test)	Large shift shock Engine overruns	-
Engine assembly ECM	Reset memory Learning by driving (Road test)	Large shift shock Engine overruns	-
Suspension control ECU Height control sensor	Vehicle height offset calibration Registration of vehicle identification information	Vehicle height sensor data may be affected due to installation position, or vehicle height recognition may be erroneous DTC B1789 is output Negative effect on the other systems.	May also occur when vehicle height is uneven due to deterioration over time Performing work after replacing the suspension control ECU with a normally functioning one from another vehicle may have negative effect on other systems
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	-
Driving support ECU	Initialize driving support ECU	Systems controlled by driving support ECU do not operate	-
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	-
Front seat set (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 engine switch is turned off Wireless door lock control function Key-linked operation function (Driver's door only) Entry lock switch-linked operation	-

SFI SYSTEM
NOTE: The Vehicle Identification Number (VIN) must be input into the replacement ECM.

HINT:

The VIN is in the form of a 17-digit alphanumeric vehicle identification number. The Techstream is required to register the VIN.
1. DESCRIPTION (Using Techstream)
  NOTE: The Vehicle Identification Number (VIN) must be input into the replacement ECM.
  
  HINT:
  - The VIN is in the form of a 17-digit alphanumeric vehicle identification number. The Techstream is required to register the VIN.
  - This registration article consists of two parts, Read VIN and Write VIN.
  1. Read VIN: Explains the VIN reading process in a flowchart. This process allows the VIN stored in the ECM to be read, in order to confirm that the two VINs, provided with the vehicle and stored in the vehicle's ECM, are the same.
  2. Write VIN: Explains the VIN writing process in a flowchart. This process allows the VIN to be input into the ECM. If the ECM is changed, or the VIN and VIN do not match, the VIN can be registered, or overwritten in the ECM by following this procedure.
    1. READ VIN
      1. Confirm the vehicle VIN.
      2. Connect the Techstream to the DLC3.
      3. Turn the engine switch on (IG).
      4. Turn the Techstream ON.
      5. Enter the following menus: Powertrain/Engine/Utility/VIN/VIN Read.
    2. WRITE VIN
      1. Confirm the vehicle VIN.
      2. Connect the Techstream to the DLC3.
      3. Turn the engine switch on (IG).
      4. Turn the Techstream ON.
      5. Enter the following menus: Powertrain/Engine/Utility/VIN/VIN Write.
AUTOMATIC TRANSMISSION SYSTEM (REGISTRATION)
NOTE:
- When the automatic transmission is replaced, the transmission compensation code must be input into the TCM (Proceed to step 1).
  After the automatic transmission is installed, the Quick Response (QR) code label will be positioned where the code cannot be read. Therefore, before installing the automatic transmission, record the transmission compensation codes or input them into the Techstream.
- When the TCM is replaced, the existing transmission compensation codes must be input into the new TCM (Proceed to step 2).
1. SET TRANSMISSION COMPENSATION CODE INTO TCM (step 1)
  NOTE: Transmission compensation codes are unique, 60-digit alphanumeric values printed on the QR label. If an incorrect transmission compensation code is input into the TCM, shift shock may occur.
  1. Record the transmission compensation code specified on the QR label.
    HINT:
    
    The transmission compensation code is a 60-digit alphanumeric value imprinted on the QR label.
  2. Move the shift lever to the N or P position.
  3. Connect the Techstream to the DLC3.
  4. Turn the engine switch on (IG).
    NOTE: Do not start the engine.
  5. Turn the Techstream on.
  6. Enter the following menus: Powertrain/ECT/Utility/A/T Code Registration.
  7. Select "Set Compensation Code".
  8. Register the compensation code.
  9. Manually input the transmission compensation code.
  10. Check that the compensation code displayed on the screen is correct by comparing it with the 60-digit alphanumeric value on the QR label.
    
    Fig 1: Identifying Transmission Compensation Code
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Safety Warning

Repair Instruction: Initialization

Use the Manual With the Right Hardware

When to See a Mechanic

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