LIGHTING SYSTEM Automatic Light Control Function does not Operate

WIRING DIAGRAM

A01EP1TE01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (AUTOMATIC LIGHT CONTROL SENSOR)


    1. Using the intelligent tester, read the Data List.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Illumination Rate Info Illuminance detected by automatic light control sensor/0 to 235600 lx Illuminance value displayed -
      OK
      Illuminance value is displayed normally.

    NG

    CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - MAIN BODY ECU) Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER (HEADLIGHT DIMMER SWITCH)


    1. Using the intelligent tester, read the Data List.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Light Auto SW Headlight dimmer switch signal (AUTO position) / ON or OFF

      ON: Headlight dimmer switch AUTO position

      OFF: Headlight dimmer switch OFF

      		 -
      OK
      When the headlight dimmer switch operation is performed, the result will be the same as above.

    NG

    INSPECT HEADLIGHT DIMMER SWITCH Click here

    OK

    REPLACE MAIN BODY ECU

  3. INSPECT HEADLIGHT DIMMER SWITCH

    A01EROOE01

    1. A01ER6LE02

      for LHD:


      1. Remove the headlight dimmer switch Click here.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        19 (A) - 12 (EL) Headlight dimmer switch (Light control switch) AUTO Below 1 Ω
        Headlight dimmer switch (Light control switch) off 10 kΩ or higher

    2. for RHD:


      1. Remove the headlight dimmer switch Click here.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Switch Condition Specified Condition
        12 (A) - 19 (EL) Headlight dimmer switch (Light control switch) AUTO Below 1 Ω
        Headlight dimmer switch (Light control switch) off 10 kΩ or higher
        Result
        Result Proceed to
        OK A
        NG (for LHD) B
        NG (for RHD) C

    B

    REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY Click here

    C

    REPLACE HEADLIGHT DIMMER SWITCH Click here

    A

  4. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - MAIN BODY ECU AND BODY GROUND)


    1. A01EQFIE01

      for LHD:


      1. Disconnect the E14 switch connector.

      2. Disconnect the E1 ECU connector.

      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        E14-19 (A) - E1-21 (A) Always Below 1 Ω
        E14-12 (EL) - Body ground
        E14-19 (A) - Body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the E14 switch connector.

      2. Disconnect the E1 ECU connector.

      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        E14-12 (A) - E1-21 (A) Always Below 1 Ω
        E14-19 (EL) - Body ground
        E14-12 (A) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU

  5. CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - MAIN BODY ECU)

    A01ER09E04

    1. Disconnect the E2 ECU connector.

    2. Disconnect the F9 sensor connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E2-20 (CLTB) - F9-6 (CLTB) Always Below 1 Ω
      E2-19 (CLTS) - F9-5 (CLTS)
      E2-18 (CLTE) - F9-3 (CLTE)
      E2-20 (CLTB) - Body ground Always 10 kΩ or higher
      E2-19 (CLTS) - Body ground
      E2-18 (CLTE) - Body ground

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK MAIN BODY ECU (CLTB VOLTAGE)

    A01EPUBE01

    1. Disconnect the E2 ECU connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E2-20 (CLTB) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPLACE MAIN BODY ECU

    OK

    REPLACE AUTOMATIC LIGHT CONTROL SENSOR Click here