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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 179 (Navigation System (Hybrid) - Diagnostics - Introduction (1 Of 3)) >> NAVIGATION SYSTEM (for HV Model) >> Precaution [08/2021 - 09/2022] >> Precaution [08/2021 - 09/2022]

Precaution [08/2021 - 09/2022]

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  1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL 
    NOTE:
    • After the power switch is turned off, the radio receiver assembly records various types of memory and settings. As a result, after turning the power switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) auxiliary battery terminal.
    • When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following systems after the terminal is reconnected.
      System Name See Procedure
      Lane Tracing Assist System  
      Pre-collision System Refer to INITIALIZATION [08/2021 - 09/2022]
      Parking Support Brake System (for HV Model)
      Lighting System (for HV Model)
      Parking Assist Monitor System (for HV Model)
      Panoramic View Monitor System (for HV Model)
      Power Trunk Lid System (for HV Model)
  2. PRECAUTION FOR NAVIGATION SYSTEM 
    NOTE:
    • When replacing the radio receiver assembly or navigation ECU, always replace it with a new one. If a radio receiver assembly or navigation ECU which was installed to another vehicle is used, the following may occur:
      • A communication malfunction DTC may be stored.
      • The radio receiver assembly or navigation ECU may not operate normally.
    • When performing the following work, the navigation system may restart when turning the power switch on (ACC) (due to radio receiver assembly and navigation ECU certification).
      • Repair or replace the negative (-) auxiliary 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 (w/ Manual (SOS) Switch).
    • 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.
    1. If any of the following parts are replaced, refer to Initialization in Repair Instruction.

      Refer to INITIALIZATION [08/2021 - 09/2022]

      • Radio receiver assembly*1
      • DCM (telematics transceiver)*2
      1. *1: After replacing the radio receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, SiriusXM radio ID registration is necessary (w/ SXM Function).

        *2: w/ Manual (SOS) Switch

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