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

    1. Learning Values Save

    2. Learning Values Write

    		 Engine start -
    Engine assembly

    • Crank Time Compensation Reset

    • Injector Compensation

    • Pilot Quantity Learning

    • Engine starting

    • DTC is output
    No. 1 crankshaft position sensor plate Crank Time Compensation Reset

    • Crank time compensation data compensation amount is same as before replacement, affecting crank time compensation data

    • DTC is output
    Air fuel ratio sensor A/F Sensor Compensation Reset

    • EGR volume is affected

    • DTC is output.

    • Supply pump assembly

    • Suction control valve

    		 Supply Pump Initialization

    • Engine start

    • DTC is output
    Exhaust manifold converter sub-assembly (DPF catalyst) Catalyst Record Clear

    • Even if catalytic converter is replaced with new one, catalyst record of DPF thermal deterioration stored in ECM is same as before replacement

    • DTC is output
    Injector assembly

    • Injector Compensation

    • Pilot Quantity Learning

    		 DTC is output.

    • Diesel throttle body assembly

    • Electric EGR control valve assembly

    • Turbocharger sub-assembly

    		 ECD System initialization Engine start
    ECM

    1. Learning Values Save

    2. Learning Values Write

    • Warning light comes on

    • Deterioration of fuel efficiency

    		 -
    Injector assembly

    • Injector Compensation

    • Pilot Quantity Learning Values Reset

    • Warning light comes on

    • Deterioration of fuel efficiency
    DPF catalyst DPF Deterioration Record Clear

    • Warning light comes on

    • Deterioration of fuel efficiency
    Air fuel ratio sensor A/F Sensor Compensation Reset

    • Warning light comes on

    • Deterioration of fuel efficiency
    Engine assembly

    • Injector Compensation

    • Pilot Quantity Learning Values Reset

    • Warning light comes on

    • Deterioration of fuel efficiency

    • Diesel throttle body assembly

    • Electric EGR control valve assembly

    • Turbocharger sub-assembly

    1. Learning Values Save

    2. Learning Values Write

    		 Engine start

    • 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

    • No. 1 ignition coil

    • Air leaks from intake system

    • Gas leaks from exhaust system

    • Knock control sensor

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

    • 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 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. -
    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

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

    1. Clear the zero point calibration data

    2. Perform zero point calibration of the deceleration sensor

    		 Stop and start system

    • Transaxle assembly

    • Transaxle parts (inside gear box)

    • TCM

    • Clutch actuator assembly

    • Clutch disc and clutch cover

    • Clutch release with bearing cylinder assembly

    • Flywheel

    • Crankshaft

    1. Initialization of multi-mode manual transaxle system [Tester display: Initialization of ECU]

    2. Learning of multi-mode manual transaxle system

    3. Synchronization position calibration

    		 Multi-mode manual transaxle system -

    • Shift and select actuator

    • Shift stroke sensor

    • Select stroke sensor

    1. Initialization of multi-mode manual transaxle system [Tester display: Initialization of transmission]

    2. Learning of multi-mode manual transaxle system

    3. Synchronization position calibration

    		 Multi-mode manual transaxle system
    Clutch stroke sensor

    1. Initialization of multi-mode manual transaxle system [Tester display: Initialization of clutch]

    2. Learning of multi-mode manual transaxle system

    		 Multi-mode manual transaxle system

    • Continuously variable transaxle assembly

    • ECM

    • Oil pressure sensor

    • Airbag sensor assembly (Yaw rate and acceleration sensor)

    1. Reset memory

    2. Deceleration sensor zero point calibration

    3. CVT oil pressure calibration

    		 Deterioration of fuel efficiency -
    Skid control ECU (Brake actuator assembly) (w/ VSC) Perform system variant learning

    • Slip indicator light illuminated

    • DTC C1288 (Error in Matching of ECUs) stored

    		 -
    Power steering ECU assembly

    • Torque sensor zero point calibration

    • Assist map writing

    • EPS warning light illuminated

    • EPS control

    		 -
    Electric power steering column sub-assembly Torque sensor zero point calibration Steering effort different between turning steering wheel left and right

    • Spiral cable with sensor sub-assembly

    • Clearance warning ECU assembly

    		 Initialize simple intelligent parking assist system Simple intelligent parking assist system -
    ECM Vehicle Identification Number (VIN) registration MIL comes on -
    ECU communication ID registration (Immobiliser system) Engine start See the Service Bulletin for the registration method.

    • Certification ECU (smart key ECU assembly)*1

    • Steering lock ECU (steering lock actuator assembly)*1

    • Electrical key transmitter sub-assembly*1

    • ID code box (immobiliser code ECC)

    		 Code registration (Immobiliser system)

    • Wireless door lock control system

    • Entry and Smart System

    • Engine start

    • Steering lock system

    • Transponder key ECU assembly*2

    • Key*2

    		 Code registration (Immobiliser system) Engine start

    • Door control transmitter assembly*2

    • Door control receiver

    		 Code registration (Wireless door lock system) Wireless door lock control system -

    • Air mix damper servo sub-assembly (for driver side)

    • Air mix damper servo sub-assembly (for front passenger side)

    • Mode damper servo sub-assembly

    • Recirculation damper servo sub-assembly

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

    • Roof sunshade ECU (sliding roof drive gear assembly)

    • Sliding roof housing sub-assembly

    		 Initialize roof sunshade system

    • Auto open and close Function

    • Jam protection function

    		 -

    • Front door window regulator assembly (for driver door)*4

    • Door window regulator sub-assembly*3

    • Door glass

    • Door glass run

    		 Initialize power window control system

    • Auto up and down function

    • Jam protection function

    • Remote control function*3

    • Key-off operation function

    		 -

    • AFS ECU (headlight swivel ECU assembly)

    • Rear height control sensor sub-assembly

    		 Perform AFS ECU (headlight swivel ECU assembly) initialization AFS function -

    • *1: w/ Entry and Start System

    • *2: w/o Entry and Start System

    • *3: for Models with Jam Protection Function on 4 Windows

    • *4: for Models with Jam Protection Function on Driver Door Window Only