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 not Performed Note
    ECM Perform Vehicle Identification Number (VIN) registration MIL comes on for 8NR-FTS
    Heavy knock history registration DTC are stored
    ECU Communication ID Registration (Immobiliser system) Engine start function See Service Bulletin for the registration method.
    Piston ring Clear heavy knock history - for 8NR-FTS

    • Throttle body with motor assembly

    • Cleaning the deposits from the throttle body with motor 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

    • Fuel injector assembly

    • Fuel pump (for low pressure side)

    • Fuel pump assembly (for high pressure side)

    • Air fuel ratio sensor

    • Engine coolant temperature sensor

    • Spark plug

    • No. 1 Ignition coil assembly

    • Air leaks from intake system

    • Gas leaks from exhaust system

    		 Inspection after repair

    • Poor idle, etc.

    • Engine start function, etc.
    ECM Perform Vehicle Identification Number (VIN) registration MIL comes on for 3ZR-FAE
    ECU Communication ID Registration (Immobiliser system) Engine start function See Service Bulletin for the registration method.

    • Throttle body assembly

    • Cleaning the deposits from the throttle body 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

    • 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

    		 Inspection after repair

    • Poor idle, etc.

    • Engine start function, etc.

    		 for 3ZR-FAE
    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 -
    Air conditioning amplifier assembly

    1. Reset air conditioning information

    2. Learning of air conditioning information
    Starter assembly Clear the number of starter operations
    Airbag sensor assembly

    1. Clear the zero point calibration data

    2. Perform zero point calibration of the deceleration sensor
    Battery

    • Clear the integrated current value

    • Switch battery type

    • Continuously variable transaxle assembly

    • ECM

    • Oil pressure sensor

    • Airbag sensor assembly

    1. Reset memory

    2. Deceleration sensor zero point calibration

    3. CVT oil pressure calibration

    		 Deterioration of fuel efficiency

    for K313

    for K313F
    CVT fluid ATF Thermal Degradation Estimate Reset The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly

    • Continuously variable transaxle assembly

    • ECM

    • Oil pressure sensor

    • Airbag sensor assembly

    1. Reset memory

    2. Deceleration sensor zero point calibration

    3. CVT oil pressure calibration

    		 Deterioration of fuel efficiency for K114
    CVT fluid ATF Thermal Degradation Estimate Reset The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly
    Millimeter wave radar sensor assembly Adjust millimeter wave radar sensor assembly

    • Dynamic radar cruise control system

    • Pre-collision system

    • Forward recognition camera system

    • Lane departure alert system (w/ Steering Control)

    • Road sign assist system

    		 -

    • Forward recognition camera

    • Windshield glass

    		 Adjust forward recognition camera

    • Dynamic radar cruise control system

    • Lane departure alert system (w/ Steering Control)

    • Pre-collision system

    • Forward recognition camera system

    • Automatic high beam system

    		 -

    • Tire pressure warning ECU and receiver

    • Tire pressure warning valve and transmitter

    • Register transmitter ID

    • 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 Registration

    for Initialization

    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 Dynamic torque control AWD system -
    Skid control ECU (brake actuator assembly) Operate the electric parking brake switch assembly Parking brake indicator light (red) blinks when the ignition switch is first turned on (IG) -

    1. Clear zero point calibration data.

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

    • DTCs are stored

    • ABS warning light illuminates

    • Slip indicator light illuminates

    • VSC disabled or malfunctions

    		 -
    Airbag sensor assembly

    1. Clear zero point calibration data.

    2. Perform yaw rate and acceleration sensor zero point calibration.
    Power steering ECU assembly

    • Torque sensor zero point calibration

    • Assist map writing

    • DTCs are stored

    • EPS warning light illuminates

    		 -
    Electric power steering column sub-assembly Torque sensor zero point calibration
    Telematics transceiver Register vehicle information Emergency call service -
    Mobilephone battery Reset mobilephone battery condition
    Steering sensor Steering angle neutral point (Initialize panoramic view monitor system) Simple Intelligent Parking Assist System -
    Toyota parking assist-sensor system (w/ Simple Intelligent Parking Assist System)
    Clearance warning ECU assembly

    • Steering angle neutral point

    • Registration of bumper type

    • Simple Intelligent Parking Assist System

    • Toyota parking assist-sensor system (w/ Simple Intelligent Parking Assist System)

    		 -
    Registration of bumper type Toyota parking assist-sensor system (w/o Simple Intelligent Parking Assist System) -
    Blind spot monitor sensor Blind spot monitor beam axis adjustment DTCs are output -

    • Certification ECU (smart key ECU assembly)

    • ID code box (immobiliser code ECU)

    • Steering lock ECU (steering lock actuator assembly)

    • Electrical key transmitter sub-assembly

    • Main body ECU (multiplex network body ECU)

    • ECM

    		 Perform code registration (Immobiliser system)

    • Wireless door lock control system

    • Entry and start system

    • Engine start function

    • Steering lock system

    		 See Service Bulletin for the registration method. (w/ Entry and Start System)

    • Door control transmitter

    • ECM

    • Transponder key ECU assembly

    		 Perform code registration (Immobiliser system) Engine starting See Service Bulletin for the registration method. (w/o Entry and Start System)

    • Door control transmitter

    • Door control receiver

    		 Register recognition code Wireless door lock operation w/o Entry and Start System

      AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System with Top-mounted Air Conditioner Pressure Sensor)

    • No. 1 Blower Damper Servo Sub-assembly (FRESH/RECIRCULATION)

    • No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Front Passenger Side Upper Air Mix)

    • No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Driver Side Upper Air Mix)

    • No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Driver Side Lower Air Mix)

    • No. 2 Air Conditioning Radiator Damper Servo Sub-assembly (Mode Switching)

    • No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Front Passenger Side Lowerr Air Mix)

    • Air conditioning amplifier assembly

    		 Initialize servo motor (Air conditioning system) DTCs are stored -

      AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System with Side-mounted Air Conditioner Pressure Sensor)

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

    • No. 1 blower damper servo sub-assembly

    • Air conditioning amplifier assembly

    		 Initialize servo motor (Air conditioning system) DTCs are stored -

      AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)

    • No. 1 Blower Damper Servo Sub-assembly (FRESH/RECIRCULATION)

    • No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Upper Air Mix)

    • No. 1 Air Conditioning Radiator Damper Servo Sub-assembly (Lower Air Mix)

    • No. 2 Air Conditioning Radiator Damper Servo Sub-assembly (Mode Switching)

    • Air conditioning amplifier assembly

    		 Initialize servo motor (Air conditioning system) DTCs are stored -

    • 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

    • Catch protection function

    • Remote control function

    • Key-linked function

    • Wireless transmitter-linked function

    • Key-off operation function

    • Window open warning function

    		 -

    • Rear height control sensor sub-assembly LH

    • Suspension, tires, etc.*1

    		 Initialize headlight ECU sub-assembly LH Automatic headlight beam level control system -
    Headlight ECU sub-assembly LH

    • Synchronize vehicle information

    • Initialize headlight ECU sub-assembly LH

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

    *2: If a front side ultrasonic sensor (LH, RH) is removed and installed or replaced, it is necessary to perform registration.

    *3: If a rear side ultrasonic sensor (LH, RH) is removed and installed or replaced, it is necessary to perform registration.

    *4: w/ Occupant Classification System

    *5: w/ Vehicle Proximity Notification System