A25A-FXS (ENGINE CONTROL): ECM: REMOVAL; 2022 MY RAV4 HV [12/2021

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM1000000021PPH
Model Year Start: 2022	Model: RAV4 HV	Prod Date Range: [12/2021 - 10/2022]
Title: A25A-FXS (ENGINE CONTROL): ECM: REMOVAL; 2022 MY RAV4 HV [12/2021 - 10/2022]

REMOVAL

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
Auxiliary battery terminal is disconnected/reconnected	Perform steering sensor zero point calibration	Lane control system
		Parking support brake system (for HV model)
		Pre-collision system
	Memorize steering angle neutral point	Parking assist monitor system
	Memorize steering angle neutral point	Panoramic view monitor system (for HV model)
	Reset back door close position	Power back door system (for HV model)
	Back door lock initialization	Power door lock control system
ECM	Perform Vehicle Identification Number (VIN) registration	DTC P063051 is output
ECM	Grille shutter switch specification infomation	Vehicle control history (RoB) [X260E] is stored

NOTICE:

If the ECM has been struck or dropped, replace it.
Perform Vehicle Identification Number (VIN) registration when replacing the ECM.
Click here

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, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) auxiliary battery terminal.

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

System Name	See Procedure
Vehicle enrolled in Toyota Audio Multimedia system or safety connect system	6 minutes
Vehicle not enrolled in Toyota Audio Multimedia system and safety connect system	1 minute

PROCEDURE

1. PRECAUTION (for LITHIUM-ION BATTERY)

HV battery learning values are stored in the battery ECU assembly and ECM and are used to detect malfunctions and illuminate the hybrid battery indicator light in the combination meter assembly. When either of these ECUs is replaced, the new ECU receives the HV battery learning values from the other ECU and stores them.

NOTICE:

Do not replace the battery ECU assembly and ECM at the same time as the HV battery learning values will be lost. However, if it is necessary to replace both ECUs at the same time, replace them by following the procedure below.
Do not replace the battery ECU assembly or ECM with a used one from another vehicle.

(a) Procedure when replacing both battery ECU assembly and ECM:

(1) Disconnect the cable from the negative (-) auxiliary battery terminal.

(2) Replace either ECU.

(3) Connect the cable to the negative (-) auxiliary battery terminal.

(4) Turn the power switch on (READY) and wait for 5 minutes or more.

(5) Turn the power switch off and disconnect the cable from the negative (-) auxiliary battery terminal.

(6) Replace the other ECU.

(7) Connect the cable to the negative (-) auxiliary battery terminal.

(8) Check that the power switch can be turned on (READY).

HINT:

If the battery ECU assembly and ECM are replaced at the same time without following the above procedure, replace either the battery ECU assembly and ECM with its original one and then replace it again by following the above procedure. If the correct procedure is not followed, perform the procedure again from the beginning.

2. REMOVE DECK BOARD ASSEMBLY

Click here

3. REMOVE REAR NO. 2 FLOOR BOARD

Click here

4. REMOVE BATTERY HOLE COVER

Click here

5. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

Click here

6. REMOVE ECM

(a) Push in the locks on the 2 levers, raise the 2 levers, and disconnect the 2 ECM connectors.

NOTICE:

After disconnecting the ECM connectors, make sure that dirt, water or other foreign matter does not contact the connecting parts of the ECM connectors.

(b) Remove the bolt and detach the clamp.

(d) Remove the ECM.

NOTICE:

If the ECM has been struck or dropped, replace it.

7. REMOVE NO. 1 ECM BRACKET

(a) Remove the 2 screws and No. 1 ECM bracket from the ECM.

8. REMOVE NO. 2 ECM BRACKET

(a) Remove the 2 screws and No. 2 ECM bracket from the ECM.