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Home › Lexus › 2004 › RX 330 FWD › Repair and Diagnosis › External Pages › Different car › Section 437 (Lighting System - Diagnostics) › Automatic Light Control Sensor Circuit › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Start the inspection from step 1 when using the hand-held tester, and start from step 2 when not using the hand-held tester.

  1. READ VALUE OF HAND-HELD TESTER 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the ignition switch to the ON position and press the hand-held tester main switch ON.
    3. Select the items below in the DATA LIST, and read the displays on the hand-held tester.

      BODY NO.1: 

      ITEM CONDITION CHART

      Item Measurement Item/Display (Range) Normal Condition Diagnostic Note
      ILLUMINATE RATE Illuminate rate/ON or OFF ON: Illuminate rate ON -
      ILLUMINATE RATE Illuminate rate/ON or OFF OFF: Illuminate rate OFF -
    1. NG: Go to step 2. 
    2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
  2. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR) 
    1. Disconnect the automatic light control sensor connector and multiplex network body ECU connector.
    2. Measure the resistance according to the value (s) in the table below.
      Fig 1: Identifying Automatic Light Control Sensor Connector Terminals Front View (1 Of 2)
      G03007504Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified Condition
      CLTE (A10-3) - CLTE (B4-4) Always Below 1 Ω
      CLTS (A10-5) - CLTS (B4-5) Always Below 1 Ω
      CLTB (A10-6) -CLTB (B4-6) Always Below 1 Ω
      CLTE (B4-4) - Body ground Always 10 kΩ or higher
      CLTS (B4-5) - Body ground Always 10 kΩ or higher
      CLTB (B4-6) - Body ground Always 10 kΩ or higher
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY 
    1. Measure the voltage according to the value (s) in the table below.

      Standard: 

      TESTER SPECIFIED CONDITION CHART

      Tester connection Condition Specified voltage
      CLTE (B4-4) - CLTB (B4-6) Ignition switch OFF --> ON Below 1 V --> 10 to 14 V
      Fig 2: Identifying Automatic Light Control Sensor Connector Terminals Front View (2 Of 2)
      G03007505Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
    2. OK: REPLACE AUTOMATIC LIGHT CONTROL SENSOR 
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