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Home >> Lexus >> 2008 >> IS 350 >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting >> Lighting System >> Hazard Warning Switch Circuit >> Inspection Procedure

Inspection Procedure

  1. PERFORM ACTIVE TEST BY TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Body / Active Test.
    5. Check the operation.

      Body (Main Body ECU RH) 

      DIAGNOSTIC NOTE

      Tester Display Test Part Control Range Diagnostic Note
      Hazard LH and RH side turn signal lights operation ON/OFF -

      OK: 

      LH and RH side turn signal lights flash. 

    NG:  Go to step  4

    OK: Go to Next Step 

  2. INSPECT CLOCK ASSEMBLY 
    1. Remove the clock assembly.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance: 

      Without Navigation System 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      J54-12 (F) - J54-8 (E) Switch Is pushed In Below 1 Ω
      J54-12 (F) - J54-8 (E) Switch is not pushed in 10 kΩ or higher

      With Navigation System 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      J53-12 (F) - J53-2 (E) Switch is pushed in Below 1 Ω
      J53-12 (F) - J53-2 (E) Switch is not pushed in 10 kΩ or higher
    3. Fig 1: Identifying J54 And J53 Connector Terminals
      G05832107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE CLOCK ASSEMBLY 

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (CLOCK ASSEMBLY - TURN SIGNAL FLASHER) 
    1. Remove the clock assembly.
      Fig 2: Identifying Harness And Connector (Clock Assembly - Turn Signal Flasher)
      G05832108Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the J30 flasher connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance: 

      Without Navigation System 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      J54-12 (F) - J30-8 (HAZ) Always Below 1 Ω
      J54-12 (F) - Body ground Always 10 kΩ or higher

      With Navigation System 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      J53-12 (F) - J30-8 (HAZ) Always Below 1 Ω
      J53-12 (F) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

  4. INSPECT FUSE (LH-IG, TURN-HAZ) 
    1. Remove the LH-IG fuse from the cowl side J/B LH.
    2. Remove the TURN-HAZ fuse from the engine room No. 1 J/B.
    3. Measure the resistance of the fuses.

      Standard resistance: 

      Below 1 Ω 

    NG: REPLACE FUSE 

    OK: Go to Next Step 

  5. CHECK HARNESS AND CONNECTOR (POWER SOURCE) 
    1. Disconnect the J30 flasher connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      J30-7 (E) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      J30-4 (B) - Body ground Always 10 to 14 V
      J30-1 (IG) - Body ground Engine switch on (IG) 10 to 14 V
    4. Fig 3: Identifying J30 Flasher Connector
      G05832109Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  6. CHECK HARNESS AND CONNECTOR 
    1. Remove the clock assembly.
      Fig 4: Identifying J54, J53 And J30 Clock Assembly Connector Terminals
      G05832110Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the J30 flasher connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance: 

      Without Navigation System 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      J54-12 (F) - J30-8 (HAZ) Always Below 1 Ω
      J54-12 (F) - Body ground Always 10 kΩ or higher

      With Navigation System 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      J53-12 (F) - J30-8 (HAZ) Always Below 1 Ω
      J53-12 (F) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE TURN SIGNAL FLASHER