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

NOTICE:

• After the engine switch is turned off, the radio receiver assembly records various types of memory and settings. As a result, after turning the engine switch off, make sure to wait at least 120 seconds before disconnecting the cable from the negative (-) battery terminal.
• When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the terminal is reconnected.

  System Name	See Procedure
  Lane Control System
  Pre-collision System
  Intelligent Clearance Sonar System
  Parking Assist Monitor System
  Panoramic View Monitor System
  Lighting System (w/ Automatic Headlight Beam Level Control System)
  Power Door Lock Control System
  Power Back Door System (w/ Outside Door Control Switch)

NOTICE:

• When performing the following work, the navigation system may restart when turning the engine switch on (ACC) (due to radio receiver assembly and navigation ECU certification).
  • Repair or replace the negative (-) battery terminal due to it being disconnected or depleted.
  • The radio receiver assembly or navigation ECU replacement or removal and installation.
• When replacing the DCM (telematics transceiver), be sure to replace it with a new one.
• After replacing the radio receiver assembly, if the "New software is not compatible with the system. Contact your dealer." on-screen message is displayed on the multi-display assembly, update the software of the navigation ECU.
• After replacing the navigation ECU, if the "New software is not compatible with the system. Contact your dealer." on-screen message is displayed on the multi-display assembly, update the software of the radio receiver assembly.

• Radio receiver assembly*
• DCM (telematics transceiver)*

• *: After replacing the radio receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, SiriusXM radio ID registration is necessary (w/ SXM Function).

Navigation System

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Parts Location

PARTS LOCATION ILLUSTRATION *1 TELEPHONE MICROPHONE ASSEMBLY *2 ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY - AMP FUSE - ECU-IG1 NO. 8 FUSE - RADIO NO. 1 FUSE - RADIO NO. 2 FUSE ...

Other materials:

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lighting System (w/ Automatic Headlight Beam Level Control System): Height Sensor Initialization Incomplete (B2450)
DESCRIPTION The No. 1 headlight ECU sub-assembly LH stores this DTC if initialization has not been performed after it was replaced. DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from B2450 Height Sensor Initialization Incomplete The engine switch is on ...

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Garage Door Opener System: Parts Location
PARTS LOCATION ILLUSTRATION *1 INNER REAR VIEW MIRROR ASSEMBLY - GARAGE DOOR OPENER *2 MAP LIGHT ASSEMBLY *3 INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ECU-DCC NO. 2 FUSE - IG1 NO. 4 FUSE - - ...