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Home >> Lexus >> 2009 >> LS 600hL >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Air Conditioning) >> Air Conditioning System >> Back-up Power Source Circuit >> Inspection Procedure
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT FUSE (A/C) 
    1. Remove the A/C fuse from the passenger side junction block.
    2. Measure the resistance according to the value(s) in the table below

      Standard resistance 

      TESTER CONNECTOR SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      A/C fuse Always Below 1 Ω

    NG: REPLACE FUSE 

    OK: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY) 
    1. Disconnect the L76 air conditioning amplifier connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTOR SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      L76-6 (+B1) - Body ground Always 11 to 14 V
      L76-7 (+B2) - Body ground
      Fig 1: Identifying Terminals Of L76 Air Conditioning Amplifier Connector
      G05774398Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )

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