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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - Service Information >> ECM >> Removal [09/2018 - 10/2020] >> Caution / Notice / Hint
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Caution / Notice / Hint

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during ECM removal/installation are shown below.

NECESSARY PROCEDURES AFTER PARTS REMOVED/INSTALLED/REPLACED

Replaced Part or Performed Procedure Necessary Procedure Effect/Inoperative Function when Necessary Procedure not Performed Link
Disconnect cable from negative battery terminal Memorize steering angle neutral point Lane control system (for Stereo camera type)
Lane control system (for Mono camera type)
Parking support brake system*
Pre-collision system (for Mono camera type)
Pre-collision system (for Stereo camera type)
AFS (Front-lighting adaptive system)
Lighting system (EXT) 
  1. Cornering lights
Variable gear ratio steering system Refer to INITIALIZATION [12/2017 - 10/2023]
Parking assist monitor system Refer to INITIALIZATION [12/2017 - 10/2022]
Panoramic view monitor system Refer to INITIALIZATION [12/2017 - 10/2022]
Initialize rear door sunshade system Rear door sunshade system Refer to INITIALIZATION [12/2017 - ]
Initialize power trunk lid system Power trunk lid system Refer to INITIALIZATION [12/2017 - 10/2020]
ECM Vehicle Identification Number (VIN) registration DTC P063051 is output Refer to REGISTRATION [12/2017 - ]
Heavy Knock History 
  • Save history
  • Write history
-
Perform code registration Engine start Refer to REGISTRATION [12/2017 - 10/2020]
If possible, read the transmission compensation code from the previous ECM 
  • Transfer transmission compensation code (step 2)*1
  • Perform road test to allow ECM to learn
  • Large shift shock
  • Engine overruns
If impossible, the transmission compensation code cannot be read from the previous ECM 
  • Set transmission compensation code (step 1)*2
  • Perform road test to allow ECM to learn

*: When performing learning using the Techstream.

NOTE:
  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Refer to PRECAUTION [12/2017 - 10/2020]