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Home >> Lexus >> 2009 >> RX 350 FWD >> Repair and Diagnosis >> Suspension >> Rear Suspension >> Air Suspension System (Diagnostic Codes & Circuit Tests) >> Air Suspension System >> Height Control OFF Indicator Light Circuit >> Procedure

Height Control OFF Indicator Light Circuit: Procedure

  1. INSPECT COMBINATION METER ASSEMBLY (HEIGHT CONTROL OFF INDICATOR LIGHT) 
    1. Remove the combination meter.
      Fig 1: Identifying Combination Meter Connector Terminals
      GTY143316Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check indicator light on the combination meter assembly.
      1. Check that the height control OFF indicator light comes on when battery positive voltage is applied to the terminals as shown in the chart below.
        Indicator Light Battery Positive Battery Negative
        OFF C8-16 C8-9

        OK

        Height control OFF indicator light comes on.

    NG → REPLACE COMBINATION METER ASSEMBLY 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - COMBINATION METER ASSEMBLY) 
    1. Disconnect the suspension control ECU S16 connector.
      Fig 2: Identifying Suspension Control ECU S16 Connector
      GTY154804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the values in the table below.

      Standard resistance

      Tester Connection Specified Condition
      S16-15 (OFID) - C8-9 Below 1 Ω
      S16-15 (OFID) - Body ground 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE