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Home >> Lexus >> 2018 >> LS 500h RWD >> Repair and Diagnosis >> Suspension >> Front Suspension >> Suspension System (Front) - Service Information (1 Of 2) >> Front Pneumatic Cylinder >> Removal [10/2023 - ] >> Procedure

Removal [10/2023 - ]: Procedure

  1. AIR SUSPENSION CONTROL PROHIBITED (WHEN REPLACING A FRONT PNEUMATIC CYLINDER) 

    HINT: 

    Check each part and system if an error is displayed for air movement pattern A.

    1. Connect the Techstream to the DLC3 with the power switch off.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on and enter the following menus: Chassis / Air suspension / Utility / Air Transfer Pattern A.

      Chassis > Air suspension > Utility 

      Tester Display
      Air Transfer Pattern A
    4. Perform vehicle height control prohibition and air movement according to the instructions on the Techstream.
  2. AIR SUSPENSION CONTROL PROHIBITED (WHEN REPLACING THE 2 FRONT PNEUMATIC CYLINDERS) 

    HINT: 

    Check each part and system if an error is displayed for air movement pattern B.

    1. Connect the Techstream to the DLC3 with the power switch off.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on and enter the following menus: Chassis / Air suspension / Utility / Air Transfer Pattern B.

      Chassis > Air suspension > Utility 

      Tester Display
      Air Transfer Pattern B
    4. Perform vehicle height control prohibition and air movement according to the instructions on the Techstream.
  3. REMOVE UPPER RADIATOR SUPPORT SEAL (for LH Side) 

    Refer to PROCEDURE - Step 2

  4. REMOVE RADIATOR COVER PLATE (for RH Side) 

    Refer to PROCEDURE - Step 3

  5. REMOVE STEERING KNUCKLE LH 

    Refer to REMOVAL [10/2023 - ]

  6. REMOVE FRONT FLEXIBLE HOSE BRACKET LH 
    1. Remove the bolt and front flexible hose bracket LH from the front shock absorber with coil spring.
      GTY807426Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. DISCONNECT FRONT HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH 
    1. Remove the nut and disconnect the front height control sensor sub-assembly LH.
      GTY807428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. REMOVE FRONT STABILIZER LINK ASSEMBLY LH 

    Refer to PROCEDURE - Step 7

  9. DISCONNECT NO. 4 HEIGHT CONTROL TUBE 
    1. Disconnect the No. 4 height control tube from the front pneumatic cylinder with shock absorber assembly LH.
      GTY807118Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Refer to PRECAUTION [10/2017 - ]

  10. REMOVE FRONT SHOCK ABSORBER CAP LH 
    1. Remove the front shock absorber cap LH.
      GTY799142Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. REMOVE FRONT PNEUMATIC CYLINDER WITH SHOCK ABSORBER ASSEMBLY LH 
    1. Disconnect the connector.
      GTY834346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the bolt.
    3. Disengage the guide to disconnect the absorber control wire.
    4. GTY812131Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Matchmark

      When reusing the front pneumatic cylinder with shock absorber assembly LH:

      1. Place matchmarks on the front suspension support assembly and pneumatic cylinder chamber.
    5. Support the front lower suspension arm assembly LH using a jack and wooden block.
      GTY821232Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Wooden Block
      *b Jack
    6. Remove the nut.
      GTY807412Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Remove the front upper shock absorber bracket plate, and disconnect the front lower shock absorber bracket sub-assembly LH from the front lower suspension arm assembly LH.
      GTY807410Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Remove the 3 nuts from the front pneumatic cylinder with shock absorber assembly LH (upper side).
      GTY832518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Slowly lower the jack and remove the front pneumatic cylinder with shock absorber assembly LH.
    10. Remove the nut.
      GTY834343Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. When reusing the front pneumatic cylinder with shock absorber assembly LH:
      1. Remove the No. 2 connector, plate and 2 O-rings.

        Refer to PRECAUTION [10/2017 - ]

  12. REMOVE FRONT LOWER SHOCK ABSORBER BRACKET SUB-ASSEMBLY LH 
    1. Secure the front lower shock absorber bracket sub-assembly LH between aluminum plates in a vise.
      NOTE:

      Do not overtighten the vise.

      GTY807421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the bolt and front lower shock absorber bracket sub-assembly LH from the front shock absorber assembly.