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Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE OF INTELLIGENT TESTER 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the engine switch on (IG) and turn the intelligent tester main switch on.
    3. Select the items below in the DATA LIST, and read the display on the intelligent tester.

      MAIN BODY (MAIN BODY ECU): 

      DATA LIST

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      DIMMER SW Dimmer switch HIGH signal / ON or OFF ON: Dimmer switch in HIGH or HIGH FLASH
      OFF: Dimmer switch in LOW      		 -
      HIGH FLASHER SW Dimmer switch HIGH FLASH signal / ON or OFF ON: Dimmer switch in HIGH FLASH
      OFF: Dimmer switch not in HIGH FLASH      		 -
      F FOG LIGHT SW Fog light switch signal / ON or OFF ON: Fog light switch ON
      OFF: Fog light switch OFF      		 -
      AUTO LIGHT SW Light control switch AUTO signal / ON or OFF ON: Light control switch in AUTO
      OFF: Light control switch not in AUTO      		 -
      HEAD LIGHT SW Light control switch HEAD signal / ON or OFF ON: Light control switch in HEAD
      OFF: Light control switch not in HEAD      		 -
      TAIL LIGHT SW Light control switch TAIL signal / ON or OFF ON: Light control switch in TAIL or HEAD
      OFF: Light control switch in neither TAIL nor HEAD      		 -

      OK: Normal conditions listed above are displayed. 

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

    NG: Go to next step. 

  2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY 

    HINT:

    (See INSPECTION  )

    OK: Headlight dimmer switch assembly is normal. 

    NG: REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY 

    OK: Go to next step. 

  3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL J/B ASSEMBLY - SWITCH ASSEMBLY) 
    1. Disconnect the E27 headlight dimmer switch assembly connector.
    2. Disconnect the E60 and E61 main body ECU connectors.
    3. Disconnect the DG instrument panel J/B connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      E27-4 (BFG) - E60-28 (FFOG) Always Below 1 Ω
      E27-11 (HU) - DG-5 (HU) Always Below 1 Ω
      E27-17 (HF) - E61-13 (HF) Always Below 1 Ω
      E27-18 (T) - E61-23 (TAIL) Always Below 1 Ω
      E27-19 (A) - E61-21 (A) Always Below 1 Ω
      E27-20 (H) - E60-17 (HEAD) Always Below 1 Ω
      E27-3 (LFG) - Body ground Always 10 kΩ or higher
      E27-4 (BFG) - Body ground Always 10 kΩ or higher
      E27-11 (HU) - Body ground Always 10 kΩ or higher
      E27-17 (HF) - Body ground Always 10 kΩ or higher
      E27-18 (T) - Body ground Always 10 kΩ or higher
      E27-19 (A) - Body ground Always 10 kΩ or higher
      E27-20 (H) - Body ground Always 10 kΩ or higher
      E27-12 (EL) - Body ground Always Below 1 Ω
    Fig 1: Checking Harness And Connector (Instrument Panel J/B Assembly - Switch Assembly)
    G05252340Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

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