Lexus RX (RX 350L, RX450h) 2016-2026 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 ...

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