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Home >> Lexus >> 2024 >> GX 550 Overtrail >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - Service Information >> ECM >> Removal [12/2023 - ] >> Caution / Notice / Hint

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
ECM The Vehicle Identification Number (VIN) or frame number registration DTC P0630-51 is output Refer to REGISTRATION [12/2023 - ]
ECU configuration - Refer to ECU CONFIGURATION [12/2023 - ]
Update ECU security key Vehicle control history (RoB) are stored Refer to UPDATE ECU SECURITY KEY [12/2023 - ]
Heavy Knock History
  • Save history
  • Write history
- Refer to REGISTRATION [12/2023 - ]
Switch specification information Vehicle control history (RoB) are stored Refer to INITIALIZATION [12/2023 - ]
Code registration Engine start Refer to REGISTRATION [12/2023 - ]

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.



COMPONENTS (REMOVAL) 

Fig 1: ECM Removal Components
GTY1216740Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Procedure Part Name Code
1 PRECAUTION - See step  1 - -
2 DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL - - - -
3 AIR CLEANER ASSEMBLY LH WITH AIR CLEANER HOSE ASSEMBLY LH 17800 - - -
4 ECM 89661 See step  4 - -
5 NO. 2 ECM BRACKET 89668 - - -
6 NO. 1 ECM BRACKET 89667E - - -