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Home >> Lexus >> 2021 >> LC 500 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - Service Information (Convertible) >> ECM >> Removal [05/2023 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

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

NECESSARY PROCEDURE AFTER PARTS REMOVED/INSTALLED/REPLACED

Replacement Part Necessary Procedure Effect/Inoperative Function when Necessary Procedures are not Performed Link
ECM Vehicle Identification Number (VIN) registration DTC P0630 is output Refer to REGISTRATION [07/2020 - ]
Perform code registration Engine start Refer to REGISTRATION [05/2023 - ]
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
for Initialization:
Refer to INITIALIZATION [07/2020 - ]
for Registration:
Refer to REGISTRATION [07/2020 - ]
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

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

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

HINT: 

When the cable is disconnected/reconnected to the battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.