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

      for 8AR-FTS

    • Piston ring

    Heavy Knock History


    • Initializes the stored history data

    		 - -

      for 8AR-FTS

    • 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

    • Camshaft timing exhaust gear assembly

    • Piston or piston ring

    • Mass air flow meter sub-assembly

    • Fuel injector assembly (for port injection)

    • Fuel injector assembly (for direct injection)

    • Fuel pump (for low pressure side)

    • Fuel pump (for high pressure side)

    • Fuel pressure sensor (for low pressure side)

    • Fuel pressure sensor (for high pressure side)

    • Air fuel ratio sensor

    • Heated oxygen sensor *1

    • Engine coolant temperature sensor

    • Spark plug

    • Ignition coil assembly

    • Air leaks from intake system

    • Gas leaks from exhaust system

    • Knock control sensor

    		 Inspection after repair Poor idle, engine start, etc. -

      for 3ZR-FAE

    • Throttle body assembly

    • Cleaning the deposits from the throttle body with motor assembly

    • Engine assembly

    • Continuously variable valve lift controller assembly

    • Cylinder head sub-assembly

    • Camshaft housing sub-assembly

    • 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

    • Engine coolant temperature sensor

    • Spark plug

    • Ignition coil assembly

    • Air leaks from intake system

    • Gas leaks from exhaust system

    • Knock control sensor

    		 Inspection after repair Poor idle, engine start, etc. -
    ECM Vehicle Identification Number (VIN) registration

      for 3ZR-FAE:

    • DTC P0630 is output

    		 -

      for 8AR-FTS:

    • DTC P063051 is output

    		 -

      for 8AR-FTS:

    • Heavy Knock History


      • Save history

      • Write history

    		 -

      for U661E, U661F:

    • If possible, read the transaxle compensation code from the previous ECM

      Possible:

    1. Reset memory

    2. Input transaxle compensation code (Into the new ECM)

    3. Perform road test to allow ECM to learn

    • Large shift shock

    • Deterioration of fuel efficiency

    		 -

      Impossible:

    1. Reset memory

    2. Reset transaxle compensation code

    3. Perform road test to allow ECM to learn

      for K114, K114F:

    1. Reset memory

    2. Deceleration sensor zero point calibration

    3. CVT oil pressure calibration

    • DTC P1589 is output (Malfunction Indicator Lamp (MIL) not illuminates)

    • Deterioration of fuel efficiency

    		 -
    Code registration (Immobiliser system) Engine start function See the Service Bulletin for the registration method.

    • Forward recognition camera

    • Windshield glass

    		 Adjust forward recognition camera

    • Dynamic radar cruise control system

    • Forward recognition camera system

    • Lane departure alert system (w/ Steering Control)

    • Pre-collision system

    • Automatic high beam system

    • Adaptive High Beam System

    		 -
    Millimeter wave radar sensor assembly Adjust millimeter wave radar sensor assembly

    • Dynamic radar cruise control system

    • Forward recognition camera system

    • Lane departure alert system (w/ Steering Control)

    • Pre-collision system

    		 -
    Engine stop and start ECU

    1. Upload the number of starter operations

    2. Reset air conditioning information

    3. Learning of air conditioning information

    4. Clear the zero point calibration data

    5. Perform zero point calibration of the deceleration sensor

    		 Stop and start system -
    Starter assembly Clear the number of starter operations

    • Automatic transaxle assembly

    • automatic transaxle fluid

    		 Bleed the oil pump assembly with motor (automatic transaxle assembly)

    • Continuously variable transaxle assembly

    • CVT fluid

    		 Bleed the oil pump assembly with motor (continuously variable transaxle assembly)
    Automatic Transaxle Assembly

    1. Reset memory

    2. Input transaxle compensation code into ECM

    3. Perform road test to allow ECM to learn

    • Large shift shock

    • Deterioration of fuel efficiency

    		 -

    • Valve body assembly

    • Shift solenoid valve SL3 and/or SL4

    1. Reset memory

    2. Reset transaxle compensation code

    3. Perform road test to allow ECM to learn

    • Large shift shock

    • Deterioration of fuel efficiency
    Shift solenoid valve SL1 and/or SL2 Perform road test to allow ECM to learn

    • Large shift shock

    • Deterioration of fuel efficiency

    • Continuously variable transaxle assembly

    • Oil pressure sensor

    1. Reset memory

    2. Deceleration sensor 0 point Calibration

    3. CVT oil pressure calibration

    • DTCs are output

    • Deterioration of fuel efficiency

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

    4WD ECU assembly

    Tech Tips

    When replacing the 4WD ECU assembly with a new one, it is not necessary to perform initialization.

    		 Clear zero point calibration data AWD initial performance (acceleration, etc) -
    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

    		 -
    Skid control ECU (brake actuator assembly) Yaw rate and acceleration sensor zero point calibration and store system information

    • DTCs are output

    • ABS warning light illumination

    • Slip indicator light illumination

    • VSC disable or malfunctioning

    		 -
    Yaw rate and acceleration sensor (Airbag ECU assembly)

    1. Clear zero point calibration data and store system information

    2. Yaw rate and acceleration sensor zero point calibration and store system information

      w/ Stop and Start System:

    1. Clear zero point calibration data

    2. Perform yaw rate and acceleration sensor zero point calibration

    		 Stop and start system -

      for K114, K114F:

    1. Reset memory

    2. Deceleration sensor 0 point Calibration

    3. CVT oil pressure calibration

    • DTCs are output

    • Deterioration of fuel efficiency

    		 -
    Clear zero point calibration data AWD initial performance (acceleration, etc) -

      w/ Occupant Classification System:

    • Occupant detection ECU

    • Front passenger seat

    		 Zero point calibration and sensitivity check (Occupant classification system)

    • Occupant classification system

    • Passenger airbag ON/OFF indicator

    • Airbag system (Front passenger side)

    • Seat belt warning system (Front passenger)

    		 -
    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). -

      for Power Tilt and Power Telescopic Steering Column:

    • Power steering ECU assembly

    • Electric 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

    		 -
    Navigation ECU

      for G-BOOK:

    • Vehicle contract setting

    		 G-BOOK function -

      for G-BOOK:

    • Download necessary data
    Radio receiver assembly

      for G-BOOK:

    • Download necessary data

    		 G-BOOK function -
    Telematics transceiver

      for G-BOOK:

    • Vehicle contract setting

    		 G-BOOK function -

      w/ Intelligent Clearance Sonar System:

    • Rear bumper assembly

    • Ultrasonic sensor

    • Measurement of ultrasonic sensor detection angle

    • Ultrasonic sensor detection angle registration

    • Intelligent clearance sonar system

    • LEXUS parking assist-sensor system (w/ Intelligent Clearance Sonar System)

    		 -
    Front bumper assembly

      w/ Intelligent Clearance Sonar System:

    • Measurement of ultrasonic sensor detection angle

    • Ultrasonic sensor detection angle registration

      w/ Panoramic View Monitor System:

    • Front television camera view adjustment

    		 Panoramic view monitor system -
    Clearance warning ECU assembly

      w/ Intelligent Clearance Sonar System:

    • Measurement of ultrasonic sensor detection angle

    • Steering angle neutral point

    • Bumper type registration

    • Ultrasonic sensor detection angle registration

    • Intelligent clearance sonar system

    • LEXUS parking assist-sensor system (w/ Intelligent Clearance Sonar System)

    		 -

      w/ LEXUS Parking Assist-Sensor System (w/o Intelligent Clearance Sonar System):

    • Registration of bumper type

    		 LEXUS parking assist-sensor system (w/o Intelligent Clearance Sonar System) -

      w/ LEXUS Parking Assist-Sensor System (w/o Intelligent Clearance Sonar System):

    • Ultrasonic sensor (front left sensor, front left center sensor, front right center sensor, front right sensor)

    		 Initialization of ultrasonic sensors (front left sensor, front left center sensor, front right center sensor, front right sensor) LEXUS parking assist-sensor system (w/o Intelligent Clearance Sonar System) -

      w/ LEXUS Parking Assist-Sensor System (w/o Intelligent Clearance Sonar System):

    • Ultrasonic sensor (rear left sensor, rear left center sensor, rear right center sensor, rear right sensor)

    		 Initialization of ultrasonic sensors (rear left sensor, rear left center sensor, rear right center sensor, rear right sensor)
    Spiral with sensor cable sub-assembly

      w/ Parking Assist Monitor System:

    • Steering angle neutral point (Initialize parking assist monitor system)

    • Steering angle setting

    		 Parking assist monitor system -

      w/ Intelligent Clearance Sonar System:

    • Steering angle neutral point (Initialize intelligent clearance sonar system)

    		 Intelligent clearance sonar system -

      w/ Panoramic View Monitor System:

    • Steering angle neutral point (Initialize panoramic view monitor system)

    • Steering angle setting

    		 Panoramic view monitor system -

      w/ Panoramic View Monitor System:

    • Parking assist ECU

    • Parking assist ECU initialization

    • Adjust steering angle

    		 Panoramic view monitor system -
    Rear television camera assembly

      w/ Parking Assist Monitor System:

    • Parking assist monitor system initialization

    • Rear television camera assembly optical axis (Back camera position setting)

    		 Parking assist monitor system -

      w/ Panoramic View Monitor System:

    • Rear television camera view adjustment

    		 Panoramic view monitor system -

      w/ Panoramic View Monitor System:

    • Side television camera assembly LH

    • Outer rear view mirror assembly LH

    		 Side television camera view adjustment Panoramic view monitor system -

      w/ Panoramic View Monitor System:

    • Front television camera assembly

    • Radiator grille 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, radiator grille assembly or front bumper 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
    Blind spot monitor sensor Blind Spot Monitor Beam Axis Adjustment

    • DTCs are output

    • Blind spot monitor system

    		 -

    • 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

    		 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.

      w/ Blocking System:

    • Navigation antenna assembly

    • Telephone transceiver assembly

    • Mayday battery

    		 Code registration (Blocking System)

    • Immobiliser system

    • Blocking System

    		 See the Service Bulletin for the registration method.
    Air conditioning amplifier assembly

      w/ Stop and Start System:

    1. Reset air conditioning information

    2. Learning of air conditioning information

    		 Stop and start system -
    Servo motor initialization DTCs are output -

    • 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 -

      w/ Power Back Door System:

    • Multiplex network door ECU

    • Kick door control sensor*2

    		 Reset connection history There are cases where the connection history display differs from the vehicle condition -
    Headlight ECU sub-assembly LH

    • Synchronize the vehicle information

    • Perform headlight ECU sub-assembly LH initialization

    • Headlight leveling function

    • Adaptive High Beam System

    		 -
    Replacement of the rear height control sensor sub-assembly LH, removal and reinstallation of the rear height control sensor sub-assembly LH, replacement of the suspension, etc. have been performed Perform headlight ECU sub-assembly LH initialization
    Wheel alignment adjustment

    1. Clear zero point calibration data.

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

    		 VSC malfunctioning -
    Suspension, tires, etc.*3

      w/ Parking Assist Monitor System:

    • Rear television camera assembly optical axis (Back camera position setting)

    		 Parking assist monitor system -

      w/ Intelligent Clearance Sonar System:

    • Measurement of ultrasonic sensor detection angle

    • Ultrasonic sensor detection angle registration

    		 Intelligent clearance sonar system -

      w/ Panoramic View Monitor System:

    • Parking assist ECU initialization

    • Adjust steering angle

    		 Panoramic view monitor system -

    *1: w/ Canister Pump Module

    *2: w/ Hands Free Power Back Door

    *3: The vehicle height changes because of suspension or tire replacement