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

Refer to the TOYOTA Repair Manual for each work procedure.


  1. PROCEDURES NECESSARY WHEN ECU OR OTHER PARTS ARE REPLACED

    Replacement Part Necessary Procedure Effect/Inoperative Function when Necessary Procedures are not Performed Note
    ECM Vehicle Identification Number (VIN) registration MIL comes on -

    • Throttle body with motor assembly

    • Cleaning the deposits from the throttle body with motor assembly

    • Engine assembly

    • Cylinder head sub-assembly

    • Camshaft (for intake or exhaust camshaft)

    • Camshaft timing gear assembly

    • Piston or piston ring

    • Mass air flow meter sub-assembly

    • Fuel injector assembly

    • Fuel pump

    • Air fuel ratio sensor

    • Engine coolant temperature sensor

    • Spark plug

    • Ignition coil assembly

    • EGR valve assembly*1

    • Air leaks from intake system

    • Gas leaks from exhaust system

    • Knock control sensor

    		 Inspection after repair Poor idle, engine start, etc. -
    Millimeter wave radar sensor assembly Adjust millimeter wave radar sensor assembly

    • Dynamic radar cruise control system

    • Pre-crash safety system

    		 -

    Lane departure warning camera

    Tech Tips

    Replaced or removed and installed

    		 Adjust lane departure warning camera Lane departure alert system -
    Absorber control ECU Perform registration of vehicle identification information

    • Interrupts damping force control

    • DTCs are output

    		 -

    • Tire pressure warning ECU and receiver

    • Tire pressure warning valve and transmitter

    • Transmitter ID registration

    • Initialization

    • When DTC detection conditions of "transmitter ID not received" DTC are met, TPWS indicator blinks for 1 minute, and then illuminates.

    • Tire pressure warning function

    		 -

    • Brake pedal stroke sensor assembly

    • Brake pedal

    1. Clear stored linear solenoid valve calibration data.

    2. Perform initialization and calibration of the linear solenoid valve.

    • DTCs are output

    • ABS warning light illumination

    • Brake warning light/yellow (minor malfunction) illumination

    • Slip indicator light illumination

    • VSC disable or malfunctioning

    		 -
    Brake booster with master cylinder assembly Perform initialization and calibration of the linear solenoid valve
    Skid control ECU (Brake booster with master cylinder assembly)

    • Perform initialization and calibration of the linear solenoid valve

    • Perform yaw rate and acceleration sensor zero point calibration

    		 -
    Yaw rate and acceleration sensor (Airbag ECU assembly)

    1. Clear zero point calibration data.

    2. Perform yaw rate and acceleration sensor zero point calibration.
    Parking brake ECU assembly Operate the electric parking brake switch (integration control and panel assembly) Parking brake indicator light (red) blinks when the power switch is first turned on (IG). -

    • The power steering ECU assembly

    • Eelectric power steering column sub-assembly

    		 Perform torque sensor zero point calibration

    • DTCs are output

    • Steering effort different between turning steering wheel left and right

    		 -
    Power steering ECU assembly Assist map writing

    • DTCs are output

    • EPS warning light illuminated

    		 -
    Radio receiver assembly Vehicle contract setting (w/ Telematics System) G-BOOK function -
    Download necessary data (w/ Telematics System) -
    Parking assist monitor system initialization Parking assist monitor system -
    Panoramic view monitor system initialization Panoramic view monitor system -
    DCM (telematics transceiver) Vehicle contract setting (w/ Telematics System) G-BOOK function -

    Spiral with sensor cable sub-assembly

    Tech Tips

    Replaced or removed and installed

    		 Steering angle neutral point (Initialize parking assist monitor system) Parking assist monitor system -
    Panoramic view monitor system -
    Steering angle setting Parking assist monitor system -
    Parking assist ECU

    • Parking assist ECU initialization

    • Adjust steering angle

    		 Panoramic view monitor system -
    Rear television camera assembly Rear television camera assembly optical axis (Back camera position setting) Parking assist monitor system -
    Rear television camera view adjustment Panoramic view monitor system -
    Front television camera assembly Front television camera view adjustment Panoramic view monitor system -

    • Side television camera assembly LH

    • Outer rear view mirror assembly LH

    		 Side television camera view adjustment

    • 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

    • Certification ECU (smart key ECU assembly)

    • Steering lock ECU (steering lock actuator assembly)

    • ID code box (immobiliser code ECU)

    • Main body ECU (multiplex network body ECU)

    • Electrical key transmitter sub-assembly

    • Hybrid vehicle control ECU

    		 Code registration (Immobiliser system)

    • Wireless door lock control system

    • Entry and start system

    • Push-button start

    • Immobiliser system

    • Steering lock system

    		 See the Service Bulletin for the registration method.

    • No. 1 air conditioning radiator damper servo sub-assembly

    • No. 2 air conditioning radiator damper servo sub-assembly

    • No. 1 blower mode damper servo sub-assembly

    		 Initialization servo motor (Air conditioning system) DTCs are output -

      w/ Roof Sunshade System:

    • Sliding roof drive gear assembly

    • Sliding roof housing sub-assembly

    		 Initialization (pulse sensor initial position setting)

    • Auto open and close function

    • Jam protection function

    		 -

    • Door window regulator assembly

    • Power window regulator motor assembly

    • Door glass

    • Door glass run

    		 Initialize power window control system

    • Auto up and down function

    • Jam protection function

    • Remote control function

    • Key-linked function

    • Wireless transmitter-linked function

    • Key-off operation function

    • Catch protection function

    • Window open warning function

    		 -

      w/ Sliding Roof System:

    • Sliding roof glass sub-assembly

    • Sliding roof drive gear sub-assembly (sliding roof ECU)

    		 Initialize sliding roof system

    • Auto operation function

    • Jam protection function

    • Key-off operation function

    • Key-linked function

    • Sliding roof open warning function

    • Wireless transmitter-linked function

    		 -

      w/ Power Back Door System:

    • Multiplex network door ECU

    		 Initialize power back door system Power back door system -
    Headlight light control ECU sub-assembly LH

    • Vehicle information registration for the headlight light control ECU sub-assembly LH

    • Perform headlight light control ECU sub-assembly LH initialization

    		 Headlight leveling function -
    Work that changes the vehicle height such as replacement or removal/installation of the rear height control sensor sub-assembly LH Perform headlight leveling ECU assembly initialization Headlight leveling function
    Toe-in is adjusted Adjust lane departure warning camera Lane departure alert system -
    Wheel alignment adjustment

    1. Clear zero point calibration data.

    2. Perform yaw rate and acceleration sensor zero point calibration.

    		 VSC malfunctioning -
    The vehicle height changes because of suspension or tire replacement Rear television camera assembly optical axis (Back camera position setting) Parking assist monitor system -
    Adjust steering angle Panoramic view monitor system -

    • *1: for 2AR-FXE, w/ EGR System