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Home >> Lexus >> 2019 >> LS 500 Base, RWD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Power Distribution System - Service Information >> INTEGRATION RELAY (for Engine Room Side) >> Removal [10/2022 - 10/2023] >> Procedure

Removal [10/2022 - 10/2023]: Procedure

  1. PRECAUTION 
    NOTE:

    After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal.

    Refer to BEFORE DISCONNECTING BATTERY [10/2022 - 10/2023]

  2. REMOVE LUGGAGE COMPARTMENT MAT SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 25

  3. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 

    Refer to PROCEDURE - Step 4

  4. REMOVE V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 11

  5. REMOVE CENTER COWL TOP VENTILATOR LOUVER 
    1. Detach the clip and claw.
      GTY838542Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Remove in this Direction
    2. Detach the guide and remove the center cowl top ventilator louver.
  6. REMOVE NO. 1 RELAY BLOCK COVER 
    1. GTY820946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Detach the claw and remove the No. 1 relay block cover.

  7. REMOVE NO. 1 SEMICONDUCTOR POWER INTEGRATION ECU 
    1. Using a thin-bladed screwdriver with its tip wrapped with protective tape, detach the claw and pull up the No. 1 semiconductor power integration ECU.
      NOTE:
      • Make sure the connector terminal is free from oil and grease.
      • Do not subject the No. 1 semiconductor power integration ECU to any impact.
      • Do not use a No. 1 semiconductor power integration ECU that has been dropped.
      • Do not disassemble the No. 1 semiconductor power integration ECU.
      GTY775553Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Protective Tape
    2. Disconnect the power source connector.
      GTY820913Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:
      • Make sure the connector terminal is free from oil and grease.
      • Do not subject the No. 1 semiconductor power integration ECU to any impact.
      • Do not use a No. 1 semiconductor power integration ECU that has been dropped.
      • Do not disassemble the No. 1 semiconductor power integration ECU.
    3. Using a thin-bladed screwdriver with its tip wrapped with protective tape, detach the claw and disconnect the lever connector.
      NOTE:
      • Make sure the connector terminal is free from oil and grease.
      • Do not subject the No. 1 semiconductor power integration ECU to any impact.
      • Do not use a No. 1 semiconductor power integration ECU that has been dropped.
      • Do not disassemble the No. 1 semiconductor power integration ECU.
      GTY790086Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Rotate in this Direction Protective Tape
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