BLIND SPOT MONITOR SYSTEM Main Switch Circuit

DESCRIPTION

When the blind spot monitor main switch (warning cancel switch assembly*1 or telltale light assembly*2) is turned on, a signal is sent to the blind spot monitor sensor LH and the blind spot monitor indicator on the blind spot monitor main switch (warning cancel switch assembly*1 or telltale light assembly*2) illuminates. The blind spot monitor system operates according to this signal.


WIRING DIAGRAM

A01KC10E01

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK VEHICLE TYPE


    1. Check vehicle type.

      Result
      Proceed to
      for LHD
      for RHD

    for RHD

    CHECK BLIND SPOT MONITOR MAIN SWITCH (TELLTALE LIGHT ASSEMBLY) Click here

    for LHD

  2. CHECK BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCEL SWITCH ASSEMBLY)


    1. Check that the blind spot monitor indicator on the blind spot monitor main switch (warning cancel switch assembly) illuminates normally when the blind spot monitor main switch (warning cancel switch assembly) is turned from off to on.

    2. Check that the blind spot monitor indicator on the blind spot monitor main switch (warning cancel switch assembly) turns off normally when the blind spot monitor main switch (warning cancel switch assembly) is turned from on to off.

      Result
      Proceed to
      The blind spot monitor indicator operates normally
      The blind spot monitor indicator does not operate normally

    The blind spot monitor indicator does not operate normally

    INSPECT BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCEL SWITCH ASSEMBLY) Click here

    The blind spot monitor indicator operates normally

  3. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Blind spot monitor Master / Data List.

    5. According to the display on GTS, read the Data List.


      Body Electrical > Blind Spot Monitor Master > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Main Switch Blind spot monitor main switch (warning cancel switch assembly) OFF or ON

      ON: Blind spot monitor main switch (warning cancel switch assembly) on

      OFF: Blind spot monitor main switch (warning cancel switch assembly) off

      		 -

      Body Electrical > Blind Spot Monitor Master > Data List
      Tester Display
      Main Switch
      Result
      Result Proceed to
      The display does not change as shown above when the blind spot monitor main switch (warning cancel switch assembly) is operated. A
      The display changes as shown above when the blind spot monitor main switch (warning cancel switch assembly) is operated. B

    B

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    A

  4. INSPECT BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCEL SWITCH ASSEMBLY)


    1. Remove the blind spot monitor main switch (warning cancel switch assembly).

      Click here

    2. Inspect the blind spot monitor main switch (warning cancel switch assembly).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCEL SWITCH ASSEMBLY) Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR MAIN SWITCH - BATTERY)


    1. Disconnect the G75 blind spot monitor main switch (warning cancel switch assembly) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G75-11 (B) - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR MAIN SWITCH - BLIND SPOT MONITOR SENSOR LH)


    1. Disconnect the R1 blind spot monitor sensor LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R1-8 (BSSW) - G75-8 (D) Always Below 1 Ω
      R1-8 (BSSW) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCEL SWITCH ASSEMBLY)


    1. Remove the blind spot monitor main switch (warning cancel switch assembly).

      Click here

    2. Inspect the blind spot monitor main switch (warning cancel switch assembly).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCEL SWITCH ASSEMBLY) Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR MAIN SWITCH - BLIND SPOT MONITOR SENSOR LH)


    1. Disconnect the R1 blind spot monitor sensor LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R1-3 (BIND) - G75-12 (E) Always Below 1 Ω
      R1-3 (BIND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. CHECK BLIND SPOT MONITOR MAIN SWITCH (TELLTALE LIGHT ASSEMBLY)


    1. Check that the blind spot monitor indicator on the blind spot monitor main switch (telltale light assembly) illuminates normally when the blind spot monitor main switch (telltale light assembly) is turned from off to on.

    2. Check that the blind spot monitor indicator on the blind spot monitor main switch (telltale light assembly) turns off normally when the blind spot monitor main switch (telltale light assembly) is turned from on to off.

      Result
      Proceed to
      The blind spot monitor indicator operates normally
      The blind spot monitor indicator does not operate normally

    The blind spot monitor indicator does not operate normally

    INSPECT BLIND SPOT MONITOR MAIN SWITCH (TELLTALE LIGHT ASSEMBLY) Click here

    The blind spot monitor indicator operates normally

  10. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS ON.

    4. Enter the following menus: Body Electrical / Blind spot monitor Master / Data List.

    5. According to the display on GTS, read the Data List.


      Body Electrical > Blind Spot Monitor Master > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Main Switch Blind spot monitor main switch (telltale light assembly) OFF or ON

      ON: Blind spot monitor main switch (telltale light assembly) on

      OFF: Blind spot monitor main switch (telltale light assembly) off

      		 -

      Body Electrical > Blind Spot Monitor Master > Data List
      Tester Display
      Main Switch
      Result
      Result Proceed to
      The display does not change as shown above when the blind spot monitor main switch (telltale light assembly) is operated. A
      The display changes as shown above when the blind spot monitor main switch (telltale light assembly) is operated. B

    B

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    A

  11. INSPECT BLIND SPOT MONITOR MAIN SWITCH (TELLTALE LIGHT ASSEMBLY)


    1. Remove the blind spot monitor main switch (telltale light assembly).

      Click here

    2. Inspect the blind spot monitor main switch (telltale light assembly).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BLIND SPOT MONITOR MAIN SWITCH (TELLTALE LIGHT SWITCH ASSEMBLY) Click here

    OK

  12. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR MAIN SWITCH - BATTERY)


    1. Disconnect the G43 blind spot monitor main switch (telltale light assembly) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G43-16 (B) - Body ground Ignition switch ON 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR MAIN SWITCH - BLIND SPOT MONITOR SENSOR LH)


    1. Disconnect the G43 blind spot monitor sensor LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R1-8 (BSSW) - G43-8 (D) Always Below 1 Ω
      R1-8 (BSSW) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  14. INSPECT BLIND SPOT MONITOR MAIN SWITCH (TELLTALE LIGHT ASSEMBLY)


    1. Remove the blind spot monitor main switch (telltale light assembly).

      Click here

    2. Inspect the blind spot monitor main switch (telltale light assembly).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE BLIND SPOT MONITOR MAIN SWITCH (TELLTALE LIGHT ASSEMBLY) Click here

    OK

  15. CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR MAIN SWITCH - BLIND SPOT MONITOR SENSOR LH)


    1. Disconnect the R1 blind spot monitor sensor LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R1-3 (BIND) - G43-10 (E) Always Below 1 Ω
      R1-3 (BIND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BLIND SPOT MONITOR SENSOR LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR