2008 Lexus LS 460FACTORY OEM SERVICE PROCEDURE

Height Control Compressor: Inspection

  1. INSPECT HEIGHT CONTROL COMPRESSOR (EXHAUST VALVE) 
    1. Measure the resistance of the exhaust valve.
      1. Measure the resistance according to the value (s) in the table.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      1 (B) - 2 (L) at 20°C (68°F) 10 to 14 Ω
      Fig 1: Identifying Height Control Compressor (Exhaust Valve) Connector
      G04944144Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the exhaust valve operation.
      1. Connect terminal 1 to the battery positive (+) terminal, and terminal 2 to the battery negative (-) terminal.
      2. Check the operating sound of the height control valve.

      OK: It should make an operating sound (click). 

  2. INSPECT HEIGHT CONTROL COMPRESSOR (COMPRESSOR MOTOR) 
    1. Check the compressor operation.
      1. Connect terminal 1 (B) to the battery positive (+) terminal, and terminal 2 (E) to the battery negative (-) terminal.
        Fig 2: Identifying Exhaust Valve Connector Terminals
        G04944190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Check the operation of the compressor motor.

      OK: Motor operates. 

      NOTE:
      • Do not operate the height control compressor for 60 seconds or more.
      • Since a short and a lock-up inside the height control compressor cause excessive current to flow, stop operation immediately when the compressor motor does not operate.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.