2012 Lexus LS 600hLFACTORY OEM SERVICE PROCEDURE

Repair Instruction: Initialization: Initialization

PROCEDURES NECESSARY WHEN BATTERY TERMINAL IS DISCONNECTED / RECONNECTED

Necessary Procedures Effects / Inoperative Functions When Necessary Procedures are not Performed See Test
Correction of steering angle neutral point Parking guidance function Refer to INITIALIZATION
Rear curtain position reset operation Rear door sunshade function Refer to INITIALIZATION
Reset power trunk lid system Power trunk lid function Refer to INITIALIZATION
NOTE:

w/ Navigation System (for HDD):

After the power switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the power switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal

Condition Waiting Time
Vehicle enrolled in safety connect system 6 minutes
Vehicle not enrolled in safety connect system 1 minute
PROCEDURES NECESSARY WHEN ECU OR OTHER PARTS ARE REPLACED

Replacement Part Necessary Procedures Effect / Inoperative Function When Necessary Procedures are not Performed See Test
ECM Register VIN DTC P0630 is output Refer to REGISTRATION
Hybrid vehicle control ECU Register cruise control system Cruise control system Refer to REGISTRATION
  • Hybrid vehicle control ECU
  • Hybrid vehicle transmission assembly
 Perform clutch oil pressure value learning initialization Large shift shock Refer to INITIALIZATION
  • Suspension control ECU
  • Height control sensor
  • Vehicle height offset calibration
  • Registration of vehicle identification information
  • Vehicle height sensor data may be affected due to installation position, or vehicle height recognition may be erroneous
  • DTC B1789 is output
  • Negative effect on the other systems.
 Refer to INITIALIZATION
  • 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 is met, TPMS indicator blinks for 1 minute, and then illuminates
  • Tire pressure monitoring function
 Refer to REGISTRATION for Registration
Refer to INITIALIZATION for Initialization
Skid control ECU
  • Initialize linear solenoid valve and perform calibration
  • Perform yaw rate and acceleration sensor zero point calibration
  • Brake warning light / yellow (minor malfunction) illumination
  • Brake warning light / red (malfunction)
  • ABS warning light illumination
  • VSC warning display of multi-information display
  • Master warning light illumination
 Refer to INITIALIZATION for Initialization
Refer to CALIBRATION for Calibration
Brake actuator
  1. Bleed air
  2. Clear stored value of linear solenoid valve and calibration data
  3. Initialize linear solenoid valve and perform calibration
 Brake does not operate properly Refer to INITIALIZATION
  • Brake pedal stroke sensor
  • Brake pedal
  1. Inspect and adjust brake pedal height
  2. Adjust brake pedal stroke sensor
  3. Clear stored value of linear solenoid valve and calibration data
  4. Initialize linear solenoid valve and perform calibration
  • Brake warning light / yellow (minor malfunction) illumination
  • Brake warning light / red (malfunction)
  • ABS warning light illumination
  • Master warning light illumination
 Refer to INITIALIZATION
Yaw rate and acceleration sensor
  1. Clear zero point calibration data
  2. Perform yaw rate and acceleration sensor zero point calibration
  • Brake warning light / yellow (minor malfunction) illumination
  • Brake warning light / red (malfunction)
  • ABS warning light illumination
  • VSC warning display of multi-information display
  • Master warning light illumination
  • VSC control is prohibited or operation is incorrect
  • VGRS system
 Refer to CALIBRATION
Electric parking brake ECU
  • Reset memory
  • Acquire tension sensor zero point
 Electric parking brake does not operate normally Refer to INITIALIZATION
Electric parking brake actuator
  • Reset memory
  • Acquire tension sensor zero point
  • Parking brake bedding
  • Electric parking brake does not operate normally
  • Parking brake performance may not be normal
  • Rear disc
  • Parking brake shoe
 Parking brake bedding Parking brake performance may not be normal
  • Power steering gear assembly
  • Steering control ECU
  • Steering column
  • Steering intermediate shaft
 Actuator angle neutral point calibration and initialization Steering wheel off-center Refer to CALIBRATION
Power steering gear assembly
  • Actuator angle neutral point calibration and initialization
  • Rotation angle sensor value initialization
  • Torque sensor zero point calibration
  • VGRS system calibration procedure
  • Steering wheel off-center
  • Difference in amount of steering assist between left and right
 Refer to CALIBRATION
Power steering ECU
  • Rotation angle sensor value initialization
  • Torque sensor zero point calibration
 Difference in amount of steering assist between left and right
Front seat set
(Occupant classification ECU)
  • Perform zero point calibration
  • Registration ECU data
  • Occupant classification system
  • Passenger airbag ON/OFF indicator
  • Airbag system (Front passenger side)
  • Seat belt warning system (Front passenger side)
 Refer to REGISTRATION for Registration
Refer to INITIALIZATION for Initialization
  • ID code box
  • Steering lock ECU
  • Hybrid vehicle control ECU
  • Key
  • Certification ECU
 Registration
  • Wireless door lock operation
  • Entry operation
  • Engine starting
  • Steering unlock
 Refer to REGISTRATION
Millimeter wave radar sensor Adjust front millimeter wave radar sensor DTC C1A11 or C1A14 is output Refer to ADJUSTMENT
Steering angle sensor connector Correction of steering angle neutral point Parking guidance function Refer to CALIBRATION
Television camera Television camera optical axis
(Camera position setting)		 Vehicle width extension lines and expected course are deviated
Parking assist ECU
  • Correction of steering angle neutral point
  • Store left and right maximum steering angle
  • Television camera optical axis

    (Camera position setting)
  • Vehicle width extension lines and expected course are deviated
  • Parking assist function
  • Object recognition ECU
  • Object recognition camera
 Adjust object recognition camera DTC C1A22 or C1A23 is output Refer to ADJUSTMENT
Driving support ECU Initialize driving support ECU Systems controlled by driving support ECU do not operate Refer to INITIALIZATION
Garage door opener transmitter Registration Garage door opener function Refer to REGISTRATION
DCM (Telematics Transceiver) DCM Activation Safety connect system does not operative Refer to DCM ACTIVATION
Power window regulator motor
(All doors)		 Initialize power window control system
  • AUTO UP / DOWN
  • Jam protection
  • Key-off
 Refer to INITIALIZATION
  • Front power seat switch

    (Seat ECU)

  • Front seat adjuster
 Position sensor initialization
  • During manual operation, buzzer sounds
  • Memory function does not operate
  • Interference stop control does not operate normally
  • Linked control does not operate normally
 Refer to INITIALIZATION
  • Position control ECU
  • Rear seat adjuster
 Position sensor initialization
  • During manual operation, buzzer sounds
  • Memory function does not operate
  • Interference stop control does not operate normally
  • Linked control does not operate normally
 Refer to INITIALIZATION
  • RR MPX-B1 fuse
  • Luggage closer motor assembly
  • Luggage door closer assembly
 Reset power trunk lid system Power trunk lid function Refer to INITIALIZATION
  • Rear door ECU LH
  • Rear door ECU RH
 Rear curtain position reset operation Rear door sunshade function Refer to INITIALIZATION
  • Sliding roof drive gear sub-assembly

    (Sliding roof ECU)

  • Sliding roof housing
  • Sliding roof glass
 Initialize sliding roof system
  • Auto operation
  • Jam protection function
  • Sliding roof operation after power switch is turned OFF
  • Wireless door lock control function
  • Key-linked operation function

    (Driver's door only)

  • Entry lock switch-linked operation
 Refer to INITIALIZATION
Combination meter assembly Combination meter initialization Normal display is not displayed Refer to INITIALIZATION
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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