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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Emission Control System - Service Information >> EGR Cooler >> Installation [10/2020 - ] >> Procedure

Installation [10/2020 - ]: Procedure

  1. INSTALL EGR COOLER ASSEMBLY 
    1. Install the EGR cooler assembly to the cylinder head sub-assembly RH with the bolt and nut.

      Torque: 10 N.m (102 kgf/cm, 7 ft.lbf) 

  2. CONNECT NO. 12 WATER BY-PASS HOSE 
    1. Connect the No. 12 water by-pass hose to the EGR cooler assembly, and slide the clamp to secure the hose.
  3. INSTALL NO. 3 WATER BY-PASS PIPE 
    1. Install the No. 3 water by-pass pipe to the EGR cooler assembly, and slide the clamp to secure the hose.
    2. Install the engine motor cable clamp bracket with the bolt.

      Torque: 8.0 N.m (82 kgf/cm, 71 in.lbf) 

  4. REMOVE NO. 4 WATER BY-PASS HOSE 
    1. Connect the No. 4 water by-pass hose from the No. 3 water by-pass pipe, and slide the clamp to secure the hose.
  5. INSTALL NO. 1 EGR PIPE 
    1. Install 2 new gaskets to the No. 1 EGR pipe and EGR cooler assembly.
    2. Install the No. 1 EGR pipe to the exhaust manifold assembly RH and EGR cooler assembly with the 2 bolts and 2 nuts.

      Torque: 21 N.m (214 kgf/cm, 15 ft.lbf) 

  6. INSTALL OUTLET HEATER WATER HOSE 
    1. Install the outlet heater water hose to the No. 2 water by-pass pipe and heater pipe, and slide the 2 clamps to secure the hoses.
  7. INSTALL INLET HEATER WATER HOSE 
    1. Install the inlet heater water hose to the No. 3 water by-pass pipe and heater pipe, and slide the 2 clamps to secure the hoses.
  8. INSTALL FENDER APRON BRACE SUB-ASSEMBLY RH 
    1. Install the fender apron brace sub-assembly RH to the body with the 2 bolts.

      Torque: 49 N.m (500 kgf/cm, 36 ft.lbf) 

    2. Attach the clamp and connect the hose to the fender apron brace sub-assembly RH.
  9. INSTALL INVERTER MOTOR CABLE BRACKET ASSEMBLY 
    1. Temporarily install the inverter motor cable bracket assembly to the inverter assembly with the 2 bolts.
    2. Tighten the 2 bolts.

      Torque: 8.0 N.m (82 kgf/cm, 71 in.lbf) 

    3. Attach the 3 clamps and connect the generator cable and motor cable to the inverter motor cable bracket assembly.
  10. INSTALL EGR VALVE ASSEMBLY 

    Refer to INSTALLATION [10/2017 - ] 

  11. INSTALL INTAKE AIR SURGE TANK ASSEMBLY 

    Refer to PROCEDURE - Step 11

  12. CONNECT MOTOR CABLE 

    Refer to PROCEDURE - Step 12

  13. CONNECT GENERATOR CABLE 

    Refer to PROCEDURE - Step 13

  14. INSTALL INVERTER TERMINAL COVER 

    Refer to PROCEDURE - Step 14

  15. INSTALL CONNECTOR COVER 

    Refer to PROCEDURE - Step 15

  16. INSTALL INVERTER COVER ASSEMBLY RH 

    Refer to PROCEDURE - Step 17

  17. INSTALL SERVICE PLUG GRIP 

    Refer to INSTALLATION [10/2020 - ]

  18. CONNECT CABLE TO NEGATIVE AUXILIARY BATTERY TERMINAL 

    Refer to INSTALLATION [10/2020 - 10/2023] , or refer to INSTALLATION [10/2023 - ]

  19. INITIALIZATION AFTER RECONNECTING AUXILIARY BATTERY TERMINAL 

    Refer to WORK PROCEDURE [10/2020 - 11/2021] , or refer to WORK PROCEDURE [11/2021 - 10/2022] , or refer to WORK PROCEDURE [10/2022 - ]

    HINT: 

    When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

    Refer to AUTOMATIC LEARNING CHART [10/2020 - 11/2021] , or refer to AUTOMATIC LEARNING CHART [11/2021 - 10/2023] , or refer to AUTOMATIC LEARNING CHART [10/2023 - ]