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

    • Heated oxygen sensor

    • Engine coolant temperature sensor

    • Spark plug

    • Ignition coil assembly

    • EGR valve assembly

    • 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

    		 -

    • Forward recognition camera

    • Windshield glass

    		 Adjust forward recognition camera

    • Lane departure alert system (w/ Steering Control)

    • Dynamic radar cruise control system

    • Forward recognition camera system

    • Pre-crash safety system

    • Automatic high beam system

    		 -

    • Tire pressure warning ECU and receiver

    • Tire pressure warning valve and transmitter

    • Transmitter ID registration

    • Initialization

    		 Tire pressure warning system -

    • 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)

    • Wheel alignment adjustment

    1. Clear zero point calibration data.

    2. Perform yaw rate and acceleration sensor zero point calibration.
    Power steering ECU assembly Assist map writing Power steering system -

      w/ Parking Assist Monitor System, for Camera built-in ECU:

    • Television camera assembly

    		 Parking assist monitor system initialization Parking assist monitor system (for Camera built-in ECU) -

      w/ Parking Assist Monitor System, for Camera built-in ECU:

    • Suspension, tires, etc.

    		 Back camera position setting

      w/ Parking Assist Monitor System, for Camera built-in ECU:

    • Spiral with sensor cable sub-assembly

    		 Steering angle setting

      w/ Panoramic View Monitor System:

    • Rear television camera assembly

    		 Rear television camera view adjustment Panoramic view monitor system -

      w/ Panoramic View Monitor System:

    • Front television camera assembly

    		 Front television camera view adjustment

      w/ Panoramic View Monitor System:

    • Side television camera assembly LH

    • Outer rear view mirror assembly LH

    		 Side television camera view adjustment

      w/ Panoramic View Monitor System:

    • Side television camera assembly RH

    • Outer rear view mirror assembly RH

    		 Side television camera view adjustment

      w/ Panoramic View Monitor System:

    • 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

      w/ Panoramic View Monitor System

    • Spiral with sensor cable sub-assembly

    		 Steering angle neutral point (Initialize panoramic view monitor system)

      w/ Panoramic View Monitor System

    • Radio and display receiver assembly

    		 Panoramic view monitor system initialization

      w/ Panoramic View Monitor System

    • Parking assist ECU

    • Parking assist ECU initialization

    • Adjust steering angle

      w/ Panoramic View Monitor System:

    • The vehicle height changes because of suspension or tire replacement

    		 Adjust steering angle

    • Certification ECU (smart key ECU assembly)

    • ID code box (immobiliser code ECU)*1

    • Hybrid Vehicle Control ECU

    • Steering lock ECU (steering lock actuator assembly)

    • Electrical transmitter Key sub-assembly

    		 Registration

    • Wireless door lock operation

    • Entry operation

    • Engine starting

    • Steering unlock

    		 Refer to 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. 3 Air conditioning radiator damper servo sub-assembly

    • No. 1 Blower mode damper servo sub-assembly

    		 Initialization servo motor DTCs are output -

      w/ Occupant Classification System:

    • Occupant detection ECU

    • Front seat assembly RH (occupant classification sensor)

    • Zero point calibration

    • Sensitivity check

    • Occupant classification system

    • Passenger airbag ON/OFF indicator

    • Airbag system (Front passenger side)

    • Seat belt warning system (Front passenger)

    		 -

    • Front power window regulator motor assembly LH

    • Front door window regulator sub-assembly LH

    • Door glass

    • Door glass run

    		 Initialize power window control system

    • Auto up/down function

    • Jam protection function

    • Catch protection function

    • Remote control function

    • Key-linked function

    • Wireless transmitter-linked function

    • Key-off operation function

    • Window open warning function

    		 -

      w/ Sliding Roof System:

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

    • Sliding roof glass sub-assembly

    • Sliding roof drive cable sub-assembly

    		 Initialize sliding roof ECU (pulse sensor initial position setting)

    • Automatic slide open/close and tilt up/down function of sliding roof

    • Jam protection function

    • Operation function after ignition off

    • Sliding roof open warning

    		 -

      w/ Power Back Door System:

    • Multiplex network door ECU

    		 Initialize power back door system Power back door system -

    • Height control sensor

    • Headlight leveling ECU

    		 Height leveling ECU initialization Height leveling function -
    *1: w/ ID code box (Immobiliser Code ECU)