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Home >> Lexus >> 2017 >> RC 350 Base, AWD >> Repair and Diagnosis >> General Information >> OEM General Information >> Introduction - General Information (1 Of 2) >> Repair Instruction >> Initialization [10/2018 - 09/2020] >> Initialization [10/2018 - 09/2020]
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Initialization [10/2018 - 09/2020]

  1. PROCEDURES NECESSARY WHEN BATTERY TERMINAL IS DISCONNECTED/RECONNECTED 
    Necessary Procedure Effect/Inoperative Function when Necessary Procedure not Performed Link
    Steering sensor zero point calibration Lane Departure Alert System (w/ Steering Control) Refer to INITIALIZATION [11/2017 - 10/2022]
    Pre-collision System
    Lighting System (EXT)
    Steering sensor initialization Variable Gear Ratio Steering System Refer to INITIALIZATION [09/2014 - ]
    Correct the steering angle neutral point Parking Assist Monitor System Refer to INITIALIZATION [11/2017 - ]
    Servo motor initialization Air Conditioning System Refer to INITIALIZATION [09/2014 - ]
    NOTE:

    After the engine switch is turned off, the radio receiver assembly records various types of memory and settings. As a result, after turning the engine switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) battery terminal.

  2. PROCEDURES NECESSARY WHEN ECU OR OTHER PARTS ARE REPLACED 
    Replacement Part Necessary Procedure Effect/Inoperative Function when Necessary Procedure not Performed Link
    ECM Vehicle Identification Number (VIN) registration MIL comes on Refer to INITIALIZATION [10/2018 - 09/2020] for 2GR-FKS
    Refer to REGISTRATION [10/2015 - ] for 8AR-FTS
    Heavy knock history - Refer to REGISTRATION [10/2015 - ] for 8AR-FTS
    ECU communication ID registration (Immobiliser system) Engine start function Refer to REGISTRATION [11/2017 - 11/2019] , or refer to REGISTRATION [11/2019 - 09/2020]
    for 2GR-FKS 
    • 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 (Fuel delivery pipe with sensor assembly) (for low pressure side)
    • Fuel pressure sensor (Fuel delivery pipe with sensor assembly LH) (for high pressure side)
    • Air fuel ratio sensor
    • Heated oxygen sensor
    • Engine coolant temperature sensor
    • Spark plug
    • Ignition coil assembly
    • Air intake system parts
    • Exhaust system parts
    • Knock control sensor
    		 Inspection after repair
    • Poor idle, etc.
    • Engine start function, etc.
    		 Refer to INITIALIZATION [10/2018 - 09/2020]
    for 8AR-FTS 
    1. Piston ring
    		 Clear heavy knock history - Refer to INITIALIZATION [10/2018 - 11/2019] , or refer to INITIALIZATION [11/2019 - ]
    for 8AR-FTS 
    • 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
    • Port fuel injector assembly
    • Direct fuel injector assembly
    • 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
    • Heated oxygen sensor
    • Engine coolant temperature sensor
    • Spark plug
    • Ignition coil assembly
    • Air intake system parts
    • Exhaust system parts
    • Knock control sensor
    		 Inspection after repair
    • Poor idle, etc.
    • Engine start function, etc.
    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
    		 Refer to ADJUSTMENT [11/2017 - 10/2022]
    • Forward recognition camera
    • Windshield glass
    		 Adjust lane departure warning camera
    • Dynamic Radar Cruise Control System
    • Forward Recognition Camera System
    • Lane Departure Alert System (w/ Steering Control)
    • Pre-collision System
    • Automatic High Beam System
    		 Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [11/2017 - 10/2022]
    • Automatic transmission with transfer assembly
    • Engine assembly
    • ECM
    		 Reset memory
    • Large shift shock
    • Deterioration of fuel efficiency
    		 Refer to INITIALIZATION [11/2017 - ] for A760H
    Automatic transmission assembly
    1. Set transmission compensation code (step 1)*1
    2. Perform road test to allow ECM to learn
    • Large shift shock
    • Deterioration of fuel efficiency
    		 Refer to INITIALIZATION [11/2017 - ] for AA81E (2GR-FKS) Initialization
    Refer to INITIALIZATION [11/2017 - ] for AA81E (2GR-FKS) Registration
    • Transmission valve body assembly
    • Shift solenoid valve SL1, 2, 3, 4 and 5
    		 Perform road test to allow ECM to learn
    ECM
    (If possible, read the transmission compensation code from the previous ECM)
    1. Transfer transmission compensation code (step 2)*2
    2. Perform road test to allow ECM to learn
    ECM
    (If impossible, read the transmission compensation code from the previous ECM)
    1. Set transmission compensation code (step 1)*3
    2. Perform road test to allow ECM to learn
    Engine assembly
    1. Reset memory
    2. Perform road test to allow ECM to learn
    Automatic transmission assembly
    1. Set transmission compensation code (step 1)*1
    2. Perform road test to allow ECM to learn
    • Large shift shock
    • Deterioration of fuel efficiency
    		 Refer to INITIALIZATION [10/2015 - ] for AA81E (8AR-FTS) Initialization
    Refer to REGISTRATION [10/2015 - ] for AA81E (8AR-FTS) Registration
    • Transmission valve body assembly
    • Shift solenoid valve SL1, 2, 3, 4 and 5
    		 Perform road test to allow ECM to learn
    ECM
    (If possible, read the transmission compensation code from the previous ECM)
    1. Transfer transmission compensation code (step 2)*2
    2. Perform road test to allow ECM to learn
    ECM
    (If impossible, read the transmission compensation code from the previous ECM)
    1. Set transmission compensation code (step 1)*3
    2. Perform road test to allow ECM to learn
    Engine assembly
    1. Reset memory
    2. Perform road test to allow ECM to learn
    4WD ECU assembly*4 Perform initialization AWD initial performance (acceleration, etc.) Refer to INITIALIZATION [09/2014 - ]
    Absorber control ECU Perform registration of vehicle identification information
    • Interrupts damping force control after moving to the 9th step.
    • DTCs are output
    		 Refer to TEST MODE PROCEDURE [09/2014 - ]
    • 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
    		 Refer to INITIALIZATION [09/2014 - 09/2020] for Initialization
    Refer to REGISTRATION [09/2014 - 09/2020] for Registration
    Skid control ECU (brake actuator assembly) 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
    		 Refer to CALIBRATION [11/2017 - 09/2020]
    Yaw rate and acceleration sensor
    1. Clearing zero point calibration data and system information.
    2. Perform yaw rate and acceleration sensor zero point calibration and store system information.
    Perform initialization AWD initial performance (acceleration, etc.) Refer to INITIALIZATION [09/2014 - ]
    • Power steering ECU assembly
    • Power steering link assembly
    		 Perform rotation angle sensor initialization and torque sensor zero point calibration
    • DTCs are output
    • Steering effort different between turning steering wheel left and right
    		 Refer to CALIBRATION [09/2014 - 09/2020]
    Power steering ECU assembly Assist map writing
    • DTCs are output
    • EPS warning light illuminated
    • VGRS ECU (front steering control ECU)
    • Steering actuator assembly
    • Parts between the steering wheel and tires have been removed/installed, replaced or adjusted
    		 Perform actuator angle neutral point calibration and initialization
    • Variable Gear Ratio Steering System
    • Steering wheel off-center
    • DTCs are output
    		 Refer to CALIBRATION [09/2014 - 09/2020]
    DRS ECU (rear steering control ECU)
    • Perform neutral position memorization and motor rotation angle sensor calibration
    • Dynamic Rear Steering System
    • Steering wheel off-center
    • DTCs are output
    		 Refer to CALIBRATION [09/2014 - 09/2020]
    Rear steering link assembly or rear suspension have been removed/installed, replaced, or adjusted
    • Perform actuator calibration value initialization
    • Perform neutral position memorization and motor rotation angle sensor calibration
    		 Steering wheel off-center
    Spiral cable with sensor sub-assembly
    • Steering angle neutral point (Initialize parking assist monitor system)
    • Steering angle setting
    		 Parking Assist Monitor System Refer to INITIALIZATION [11/2017 - ] for Initialization
    Refer to CALIBRATION [11/2017 - ] for Calibration
    Suspension, tires, etc.*5 Rear television camera assembly optical axis (back camera position setting)
    Rear television camera assembly
    • Parking assist monitor system initialization
    • Rear television camera assembly optical axis (back camera position setting)
    Blind spot monitor sensor Blind spot monitor beam axis adjustment DTCs are output Refer to OPERATION CHECK [10/2018 - ]
    • Inner rear view mirror assembly
    • Garage door opener transmitter
    		 Re-registration of codes in the garage door opener system
    • Register transmitter code
    • Rolling code systems
    		 Garage Door Opener System Refer to REGISTRATION [09/2014 - ]
    DCM (telematics transceiver) DCM activation Safety Connect System Refer to DCM ACTIVATION [11/2017 - 11/2019] , or refer to DCM ACTIVATION [11/2019 - ]
    BUB (Back-up battery) Perform backup battery replacement reset Refer to INITIALIZATION [11/2017 - 11/2019] , or refer to INITIALIZATION [11/2019 - ]
    • Certification ECU (smart key ECU assembly)
    • ID code box (immobiliser code ECU)
    • Steering lock ECU (steering lock actuator assembly)
    • ECM
    • Main body ECU (multiplex network body ECU)
    • Electrical key transmitter sub-assembly
    • DCM (telematics transceiver)
    		 Code registration (Immobiliser system)
    • Wireless Door Lock Control System
    • Smart Access System with Push-button Start
    • Engine start
    • Steering Lock System
    • Telematics System
    		 Refer to REGISTRATION [11/2017 - 11/2019] , or refer to REGISTRATION [11/2019 - 09/2020]
    • Occupant classification 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)
    		 Refer to INITIALIZATION [09/2014 - ]
    • No. 1 air conditioning radiator damper servo sub-assembly
    • No. 2 air conditioning radiator damper servo sub-assembly (driver side
    • No. 2 air conditioning radiator damper servo sub-assembly (front passenger side)
    • No. 3 air conditioning radiator damper servo sub-assembly
    • No. 4 air conditioning radiator damper servo sub-assembly
    • No. 5 air conditioning radiator damper servo sub-assembly
    • No. 1 blower damper servo sub-assembly
    		 Initialization servo motor (Air conditioning system) DTCs are output Refer to INITIALIZATION [09/2014 - ]
    • Door window regulator sub-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
    		 Refer to INITIALIZATION [09/2014 - ]
    • 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
    		 Refer to INITIALIZATION [09/2014 - ]
    No. 1 Headlight ECU Sub-assembly LH
    1. Synchronize the vehicle information
    2. Perform No. 1 headlight ECU Sub-assembly LH initialization
    		 Headlight leveling function Refer to INITIALIZATION [10/2018 - ]
    Rear height control sensor sub-assembly LH Perform No. 1 headlight ECU sub-assembly LH initialization

    *1: Set the transmission compensation code of the new automatic transmission.

    *2: Read the compensation code from the previous ECM, then transfer it to the new ECM.

    *3: Set the transmission compensation code of the current automatic transmission.

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

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

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