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Home >> Toyota >> 2008 >> Camry Base, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting (Except Hybrid) >> Lighting System >> DTC B1244 Light Sensor Circuit Malfunction >> Inspection Procedure

Inspection Procedure

  1. READ VALUE OF TECHSTREAM 
    1. Connect Techstream to the DLC3.
    2. Turn the ignition switch on (IG).
    3. Turn Techstream on.
    4. Select the following menu items: Body Electrical / Main Body / Data List.
    5. Read the display on Techstream.

      Main Body: 

      DATA LIST REFERENCE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Illumination Rate Illumination rate information / 0 ms to 99.99 ms Value is output according to ambient light levels -

      OK: 

      Normal condition listed above is displayed. 

    OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    NG: Go to next step 

  2. CHECK VEHICLE CONDITION 

    Result 

    RESULT REFERENCE

    Vehicle Condition Proceed to
    Manual Air Conditioning System A
    Automatic Air Conditioning System B

    B:  Go to step  6

    A: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR) 
    1. Disconnect the E11 automatic light control sensor connector.
    2. Disconnect the E6 main body ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E6-18 (CLTE) - E11-6 (CLTE) Always Below 1 Ω
      E6-19 (CLTS) - E11-4 (CLTS) Always Below 1 Ω
      E6-20 (CLTB) - E11-3 (CLTB) Always Below 1 Ω
      E6-18 (CLTE) - Body ground Always 10 kΩ or higher
      E6-19 (CLTS) - Body ground Always 10 kΩ or higher
      E6-20 (CLTB) - Body ground Always 10 kΩ or higher
      4. Fig 1: Checking Harness And Connector (Main Body ECU - Automatic Light Control)
      G04980058Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. INSPECT MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Reconnect the main body ECU connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      E11-3 (CLTB) - E11-6 (CLTE) Ignition switch off Below 1 V
      Ignition switch on (IG) 10 to 14 V

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E11-6 (CLTE) - Body ground Always Below 1 Ω
      3. Fig 2: Identifying Automatic Light Control Sensor
      G04980059Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    OK: Go to next step 

  5. INSPECT AUTOMATIC LIGHT CONTROL SENSOR 
    1. Reconnect the automatic light control sensor connector.
    2. Connect an oscilloscope to the automatic light control sensor connector.
      Fig 3: Identifying Automatic Light Control Sensor Connector Terminal
      G04980060Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the waveform.
      Fig 4: Automatic Light Control Sensor Waveform Graph
      G04980053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      WAVEFORM REFERENCE

      Tester Connection Tool Setting Condition Specified Condition
      E11-6 (CLTE) - E11-4 (CLTS) 5 V/DIV., 5 ms./DIV. Ignition switch on (IG), light control switch in AUTO Correct waveform is as shown

      HINT:

      If the ambient light becomes brighter, width A becomes narrower.

    NG: REPLACE AUTOMATIC LIGHT CONTROL SENSOR 

    OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

  6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR) 
    1. Disconnect the E11 automatic light control sensor connector.
    2. Disconnect the E6 main body ECU connector.

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E6-18 (CLTE) - E11-3 (CLTE) Always Below 1 Ω
      E6-19 (CLTS) - E11-5 (CLTS) Always Below 1 Ω
      E6-20 (CLTB) - E11-6 (CLTB) Always Below 1 Ω
      E6-18 (CLTE) - Body ground Always 10 kΩ or higher
      E6-19 (CLTS) - Body ground Always 10 kΩ or higher
      E6-20 (CLTB) - Body ground Always 10 kΩ or higher
      3. Fig 5: Identifying E11 Automatic Light Control Sensor Connector And E6 Main Body ECU Connector Terminal
      G04980062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  7. INSPECT MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Reconnect the main body ECU connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      E11-6 (CLTB) - E11-3 (CLTE) Ignition switch off Below 1 V
      E11-6 (CLTB) - E11-3 (CLTE) Ignition switch on (IG) 10 to 14 V

      Standard resistance 

      RESISTANCE REFERENCE

      Tester Connection Condition Specified Condition
      E11-3 (CLTE) - Body ground Always Below 1 Ω
      3. Fig 6: Identifying E11 Automatic Light Control Sensor Connector Terminal
      G04980063Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    OK: Go to next step 

  8. INSPECT AUTOMATIC LIGHT CONTROL SENSOR 
    1. Reconnect the automatic light control sensor connector.
    2. Connect an oscilloscope to the automatic light control sensor connector.
      Fig 7: Identifying E11 Automatic Light Control Sensor
      G04980064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the waveform.

      OK 

      WAVEFORM REFERENCE

      Tester Connection Tool Setting Condition Specified Condition
      E11-3 (CLTE) - E11-5 (CLTS) 5 V/DIV., 5 ms./DIV. Ignition switch on (IG), light control switch in AUTO Correct waveform is as shown in Fig 8
      Fig 8: Identifying Waveform
      G04980053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      If the ambient light becomes brighter, width A becomes narrower.

    NG: REPLACE AUTOMATIC LIGHT CONTROL SENSOR 

    OK: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

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