Caution / Notice / Hint

WARNING: This page is about a different car, the 2025 Toyota Highlander, 2024 Toyota Highlander, and 2023 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

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
Battery terminal is disconnected/reconnected	Idle the engine for approximately 5 to 60 minutes or drive the vehicle until stop and start control is permitted	Stop and Start System	Refer to PRECAUTION [10/2022 - 11/2023]
	Perform steering sensor zero point calibration	Lane Control System	Refer to INITIALIZATION [12/2019 - ]
		Parking Support Brake System*1
		Pre-collision System
		Lighting System (EXT) (w/ AFS)
	Initialize back door lock	Power Door Lock Control System	Refer to INITIALIZATION [12/2019 - 11/2023]
	Reset back door close position	Power Back Door System	Refer to INITIALIZATION [12/2019 - 11/2023]
Replacement of ECM	Perform Vehicle Identification Number (VIN) registration	DTC is output	Refer to REGISTRATION [10/2022 - ]
	Heavy knock history Save history Write history	-	Refer to REGISTRATION [10/2022 - ]
	Code registration	Engine start function	Refer to REGISTRATION [10/2022 - 11/2023]
	If transaxle compensation code read from ECM Perform reset memory*2 Transfer transaxle compensation code Perform road test to allow ECM to learn	Large shift shock Deterioration of fuel efficiency	for Initialization: Refer to INITIALIZATION [10/2022 - ] for Registration: Refer to REGISTRATION [10/2022 - ]
	If transaxle compensation code not read from ECM Perform reset memory*2 Reset transaxle compensation code Perform road test to allow ECM to learn	Large shift shock Deterioration of fuel efficiency

*1: Learning can also be performed using the GTS.

*2: Not necessary when ECM replaced with new one

NOTE:

After the ignition switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, make sure to wait at least 2 minutes before disconnecting the cable from the negative (-) auxiliary battery terminal.
When the cable is disconnected from the negative (-) auxiliary battery terminal and the security lock setting has been enabled, multi-display operations will be disabled upon next startup unless the password is entered. Be sure to check the security lock setting before disconnecting the cable from the negative (-) auxiliary battery terminal.
If the ECM has been struck or dropped, replace it.