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 Perform Vehicle Identification Number (VIN) or frame number registration MIL comes on

    for 1AR-FE

    for 2GR-FKS
    ECU communication ID registration (Immobiliser system) Engine start function See the Service Bulletin for the registration method.

    • 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

    • 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, etc.

    • Engine start function, etc.

    		 for 1AR-FE

    • 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 assembly (for high pressure side)

    • Fuel pressure sensor (for low pressure side)

    • Fuel pressure sensor (for high pressure side)

    • 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, etc.

    • Engine start function, etc.

    		 for 2GR-FKS
    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)

    • Road sign assist system

    • Pre-collision system

    		 -

    • 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)

    • Road sign assist system

    • Pre-collision system

    • Automatic high beam system

    		 -
    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

    for UA80E Initialization

    for UA80E Registration

    for UA80F Initialization

    for UA80F Registration

    • Valve body assembly

    • Shift solenoid valve SL1, SL2, SL3, SL4, SL5 and/or SL6

    1. Reset memory

    2. Reset transaxle compensation code

    3. Perform road test to allow ECM to learn
    ECM (If possible, read the transaxle compensation code from the previous ECM) Possible

    1. Reset memory*13

    2. Transfer transaxle compensation code

    3. Perform road test to allow ECM to learn
    Impossible

    1. Reset memory*13

    2. Reset transaxle compensation code

    3. Perform road test to allow ECM to learn
    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

    for U760E Initialization

    for U760E Registration

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

    ECM

    (If possible, read the transaxle compensation code from the previous ECM)

    		 Possible

    1. Reset memory

    2. Transfer transaxle compensation code

    3. Perform road test to allow ECM to learn
    Impossible

    1. Reset memory

    2. Reset transaxle compensation code

    3. Perform road test to allow ECM to learn

    • 4WD ECU assembly*1

    • Acceleration sensor (airbag sensor assembly)

    		 Perform calibration AWD initial performance (acceleration, etc) -

    • Tire pressure warning ECU

    • Tire pressure warning valve and transmitter

    1. Register transmitter IDs

    2. Initialize tire pressure warning system

    • 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

    for Initialization

    for Registration
    Skid control ECU (brake actuator assembly)

    1. Clear zero point calibration data and store system information.

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

    • VSC disabled or malfunctioning

    • DTCs are output

    • Slip indicator light illuminated

    • ABS warning light illuminated

    		 -
    Yaw rate and acceleration sensor (airbag sensor assembly)

    1. Clear zero point calibration data and store system information.

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

    • DTCs are output

    • EPS control

    • EPS warning light illuminated

    		 -
    Telematics transceiver*10 Register vehicle information Emergency call service -
    Mobilephone battery*10 Reset mobilephone battery condition

    • Spiral cable with sensor sub-assembly

    • Steering sensor

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

    • Steering angle setting

    		 Parking assist monitor system

    for Initialization

    for Calibration
    Suspension, tires, etc. Television camera assembly optical axis (Back camera position setting)
    Television camera assembly

    • Parking assist monitor system initialization

    • Television camera assembly optical axis (Back camera position setting)
    Blind spot monitor sensor Blind spot monitor beam axis inspection DTCs are output -
    Steering sensor Steering angle neutral point (Initialize panoramic view monitor system) Panoramic view monitor system

    for Initialization

    for Calibration
    Parking assist ECU

    • Parking assist ECU initialization

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

    • Front television camera assembly

    • Front bumper 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 front bumper assembly

    • 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.*11

    • Parking assist ECU initialization

    • Adjust steering angle

    • Certification ECU (smart key ECU assembly)*2

    • ID code box (immobiliser code ECU)*2*4

    • Steering lock ECU (steering lock actuator assembly)*2

    • Electrical key transmitter sub-assembly*2

    • ECM*2

    • Main body ECU (multiplex network body ECU)*2

    		 Code registration (Immobiliser system (w/ Smart Entry and Start System))

    • Wireless door lock control system

    • Smart entry and start system

    • Engine start

    • Steering lock system

    		 See Service Bulletin for the registration method.

    • Transponder key ECU assembly*3

    • Door control receiver

    • ECM*3

    		 Code registration (Immobiliser system (w/o Smart Entry and Start System))

    • Wireless door lock control system

    • Engine start

    		 See Service Bulletin for the registration method.

    • Door control transmitter module set sub-assembly

    • Door control receiver

    		 Code registration (Wireless door lock system (w/o Smart Entry and Start System)) Wireless door lock control system *3

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

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

    • Rear air mix damper servo sub-assembly

    • Rear mode damper servo sub-assembly

    • Blower damper servo sub-assembly

    		 Initialization servo motor (Air conditioning system (for Automatic Air Conditioning System)) DTCs are output *5

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

    • Rear air mix damper servo sub-assembly

    • Rear mode damper servo sub-assembly

    • Blower damper servo sub-assembly

    		 Initialization servo motor (Air conditioning system (for Manual Air Conditioning System)) DTCs are output *6

    • Door window regulator assembly

    • Power window regulator motor assembly

    • Door glass

    • Door glass run

    		 Initialize power window control system (for Models with Jam Protection Function on 4 Windows)

    • Auto up and down function

    • Jam protection function

    • Remote control function

    • Key-linked function

    • Wireless transmitter-linked function

    • Key-off operation function

    		 *7

    • Door window regulator assembly

    • Power window regulator motor assembly (for driver door)

    • Power window regulator motor assembly (for front passenger door)

    • Door glass

    • Door glass run

    		 Initialize power window control system (for Models with Jam Protection Function on Front Door Windows)

    • Auto up and down function

    • Jam protection function

    • Remote control function

    • Key-linked function

    • Wireless transmitter-linked function

    • Key-off operation function

    		 *8

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

    • Sliding roof glass sub-assembly

    • Sliding roof drive cable sub-assembly

    		 Initialize sliding roof system

    • Auto operation function

    • Jam protection function

    • Key-off operation function

    • Key-linked function

    • Wireless transmitter-linked function

    • Sliding roof open warning function

    		 -

    • Multiplex network door ECU*9

    • Power back door unit assembly set LH or RH*9

    • Back door lock assembly*9

    		 Reset back door close position Power back door system -
    Headlight leveling ECU assembly*12

    • Synchronize the vehicle information

    • Perform headlight leveling ECU assembly initialization

    		 Headlight leveling function -
    Rear height control sensor sub-assembly*12 Perform headlight leveling ECU assembly initialization Headlight leveling function

    • *1: When the 4WD ECU assembly is replaced with a new one, calibration is unnecessary.

    • *2: w/ Smart entry and start system

    • *3: w/o Smart entry and start system

    • *4: w/ Rear Seat Heater

    • *5: for Automatic Air Conditioning System

    • *6: for Manual Air Conditioning System

    • *7: w/ Jam Protection Function on 4 Windows

    • *8: w/ Jam Protection Function on Front Door Windows

    • *9: w/ Power Back Door System

    • *10: w/ Manual (SOS) Switch

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

    • *12: w/ Automatic Headlight Beam Level Control System

    • *13: When the ECM is replaced with a new one, reset memory is unnecessary.