Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Removal

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 integration relay removal/installation are shown below.

PROCEDURE

1. PRECAUTION

NOTICE:

After turning the engine 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.

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2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

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3. DISCONNECT BRAKE MASTER CYLINDER RESERVOIR ASSEMBLY

(a) Disconnect the reservoir level switch connector and remove the bolt from the brake master cylinder reservoir assembly.

	Connector
	Bolt
	Remove in this Direction

(b) Move the brake master cylinder reservoir assembly as shown in the illustration to disengage the 2 claws, and disconnect it.

4. REMOVE RESERVOIR BRACKET

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5. REMOVE NO. 1 RELAY BLOCK COVER

(a) Disengage the claw and 2 guides to remove the No. 1 relay block cover as indicated by the arrows, in the order shown in the illustration.

	Remove in this Direction (1)
	Remove in this Direction (2)

(b) Disengage the claw and 2 guides to remove the No. 1 relay block cover as indicated by the arrows, in the order shown in the illustration.

	Remove in this Direction (1)
	Remove in this Direction (2)

6. REMOVE SEMICONDUCTOR POWER INTEGRATION ECU

(a) Disengage the 2 claws.

Remove in this Direction

(b) Pull up the semiconductor power integration ECU as shown in the illustration.

NOTICE:

When pulling the semiconductor power integration ECU, take care not to damage it.

(c) Disconnect the 5 connectors and remove the semiconductor power integration ECU. NOTICE: When pulling the semiconductor power integration ECU, take care not to damage it.