WHEN REMOVING,INSTALLING,REPAIRING OR REPLACING PARTS PROCEDURES NECESSARY WHEN ECU OR OTHER PARTS ARE REPLACED

Refer to the LEXUS Repair Manual for each work procedure.


  1. PROCEDURES NECESSARY WHEN ECU OR OTHER PARTS ARE REPLACED

    Procedures Necessary when ECU or Other Parts are Replaced
    Replacement Part Necessary Procedures Effects / Inoperative Functions When Necessary Procedures are not Performed Notes
    ECM Register VIN DTC P0630 is output. -

      1VD-FTV, w/ DPF:

    • Learning values save

    • Learning values write

    		 Engine starting -

      1VD-FTV, w/o DPF:

    • Learning values save

    • Learning values write

    • Input Injector Compensation Code

    		 Engine starting -

      3UR-FE:

    • Throttle body assembly

    • Cleaning the deposits from the throttle body assembly

    • Engine assembly

    • Cylinder head sub-assembly

    • Camshaft (for intake or exhaust camshaft)

    • Camshaft timing gear assembly

    • Camshaft timing exhaust gear assembly

    • Piston or piston ring

    • Mass air flow meter sub-assembly

    • Fuel injector assembly

    • Fuel pump

    • Air fuel ratio sensor

    • Heated oxygen sensor

    • Engine coolant temperature sensor

    • Spark plug

    • Ignition coil assembly

    • Air leaks from air induction system

    • Gas leaks from exhaust system

    • Knock control sensor

    		 Initialization Engine control system -
    Engine assembly

      1VD-FTV, w/ DPF:

    • Clear Crank Time Compensation Data

    • Injector compensation code registration

    • Pilot quantity learning

    		 Engine starting -

      1VD-FTV, w/o DPF:

    • Injector compensation code registration

    		 Engine starting -
    Injector assembly

      1VD-FTV, w/ DPF:

    • Injector compensation code registration

    • Pilot quantity learning

    		 DTC P062F is output -

      1VD-FTV, w/o DPF:

    • Injector compensation code registration

    		 DTC P1601 is output -
    Fuel supply pump assembly Supply pump initialization Engine startability -

      1VD-FTV, w/ DPF:

    • Crankshaft position sensor plate

    		 Clear crank time compensation data Crank time compensation data compensation amount is same as before replacement, affecting crank time compensation data -

      1VD-FTV, w/ DPF:

    • Air fuel ratio sensor

    		 Clear A/F sensor compensation data EGR volume is affected

      1VD-FTV, w/ DPF:

    • Front exhaust pipe assemblies (DPF catalytic converter)

    • Monolithic converter assemblies (CCo catalytic converter)

    • Clear DPF thermal deterioration data

    • Learning values write

    		 Even if catalytic converter is replaced with new one, catalyst record of DPF thermal deterioration stored in ECM is same as before replacement -
    Millimeter wave radar sensor assembly Adjusting the radar beam axis

    • Lane departure alert system

    • Dynamic radar cruise control system

    • Pre-crash safety system

    		 -

    • Forward Recognition camera

    • Windshield glass

    		 Adjust forward recognition camera

    • Lane departure alert system

    • Forward recognition camera system

    • Dynamic radar cruise control system

    • Pre-crash safety system

    • Automatic high beam system

    		 -

      AB60F:

    • Automatic transmission assembly

    • Valve body assembly

    • Any of shift solenoid valves

    		 Reset memory Large shift shock -

      AB60F:

    • Automatic transmission fluid

    		 ATF thermal degradation estimate reset The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly.

      AE80F:

    • Automatic transmission assembly

    • Transmission valve body assembly

    • Any of shift solenoid valves

    		 Reset memory

    • Large shift shock

    • Engine overruns

    		 -

      AE80F:

    • Automatic transmission fluid

    		 ATF thermal degradation estimate reset The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly.

    • Suspension control ECU

    • Height control sensor

    		 Vehicle height offset calibration Vehicle height sensor date may be affected due to installation position, or vehicle height recognition may be erroneous -

    • Tire pressure warning ECU and receiver

    • Tire pressure warning valve and transmitter

    1. Register transmitter IDs

    2. Initialize tire pressure warning system

    3. Tire Position Identification

    • When DTC detection conditions of "transmitter ID not received" DTC is met, tire pressure warning light blinks for 1 minute, and then illuminates

    • Tire pressure monitoring function of replaced wheel

    • Tire Inflation Pressure Display Function

    		 -

    • Skid Control ECU (Master Cylinder Solenoid)

    • Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly)

    1. Clearing zero point calibration data

    2. Yaw rate and acceleration sensor zero point calibration

    • ABS warning light illumination

    • Slip indicator light illumination

    		 -
    Vehicle height adjustment

    1. Clearing zero point calibration data

    2. Yaw rate and acceleration sensor zero point calibration

    3. Steering sensor initialization

    		 The brake control and dynamic control systems do not operate properly
    Parking brake ECU assembly

    • Reset Memory

    • Acquire tension sensor zero point

    		 Electric parking brake system -

    Parking brake with bracket actuator assembly

    Tech Tips

    Replaced or removed and installed

    • Reset Memory

    • Acquire tension sensor zero point

    • Parking brake bedding

    • Parking brake shoe

    • Rear disc

    Tech Tips

    Replaced or removed and installed

    		 Parking brake bedding

    • Steering control ECU

    • Steering actuator assembly

    • Steering wheel assembly

    • Steering column assembly

    • Steering intermediate shaft

    • Front wheel alignment has been adjusted

    • Power steering link assembly

    • Steering wheel is still off-center after completing

    		 Calibration

    • VGRS system

    • DTC output

    		 -
    Multi-media module receiver assembly Vehicle contract setting G-BOOK service -
    Download necessary data Some G-BOOK service content will be unavailable -
    Spiral with sensor cable sub-assembly Steering angle neutral point (Initialize multi-terrain monitor system) Multi-terrain Monitor system -
    Parking assist ECU

    • Parking assist ECU initialization

    • Adjust steering angle
    Rear television camera assembly Rear television camera view adjustment
    Front television camera assembly Front television camera view adjustment

    • Side television camera assembly LH

    • Outer rear view mirror assembly LH

    • Side television camera assembly RH

    • Outer rear view mirror assembly RH

    		 Side television camera view adjustment

    • Front television camera assembly or radiator grille assembly

    • Rear television camera assembly

    • Side television camera assembly LH or outer rear view mirror assembly LH

    • Side television camera assembly RH or outer rear view mirror assembly RH

    		 Television camera view adjustment
    Suspension, tires, etc. Adjust steering angle
    DCM (telematics transceiver) Vehicle contract setting G-BOOK service -

    • Certification ECU (smart key ECU assembly)

    • ID code box (immobiliser code ECU)

    • Steering lock ECU (steering lock actuator assembly)

    • Electrical key transmitter sub-assembly

    • ECM

    • Main body ECU (multiplex network body ECU)

    		 Registration

    • Wireless door lock operation

    • Entry operation

    • Engine starting

    • Steering unlock

    		 Refer to the Service Bulletin for the registration procedure.
    Servo motors Servomotors initialization Air conditioning system does not operate properly -

    • Door window regulator assembly

    • Power window regulator motor assembly

    • Door glass

    • Door glass run

    		 Initialize the motor

    • Auto up and down function

    • Jam protection function

    • Catch protection function

    • Remote control function

    • Key-linked function

    • Key-off operation function

    		 -

    • Sliding roof driver gear (Sliding roof ECU)

    • Sliding roof glass

    		 Initialize sliding roof system

    • Auto operation

    • Jam protection function

    • Sliding roof operation after engine switch OFF

    • Wireless door lock control function

    • Key-linked operation function (Driver side door only)

    • Entry lock switch-linked operation

    		 -

    • Power back door unit

    • Back door lock

    		 Initialize back door system Power back door system -

    • Headlight ECU sub-assembly LH

    • The vehicle height changes due to replacement of suspension components or after performing such operations as removal and reinstallation or replacement of the rear height control sensor sub-assembly

    		 Initialization Beam axis deviation -