BLIND SPOT MONITOR SYSTEM Main Switch Circuit

DESCRIPTION

When the blind spot monitor main switch (warning canceling switch assembly) 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 canceling switch assembly) illuminates. The blind spot monitor system operates according to this signal.

WIRING DIAGRAM

A0022SCE07

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. CHECK BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY)


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

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

      OK
      The blind spot monitor indicator operates normally.
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  2. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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 State of the blind spot monitor main switch (warning canceling switch assembly) OFF or ON

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

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

      		 -

      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 canceling switch assembly) is operated. A
      The display changes as shown above when the blind spot monitor main switch (warning canceling switch assembly) is operated. B

    B

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

    A

  3. INSPECT BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY)


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

      Click here

    2. A0021KEC15
      *a

      Component without harness connected

      (Blind Spot Monitor Main Switch (Warning Canceling Switch Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      8 (B) - 11 (D) Blind spot monitor main switch on (not protruding) Below 1 Ω
      8 (B) - 11 (D) Blind spot monitor main switch off (protruding) 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

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


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K104-8 (B) - Body ground Power switch on (IG) 11 to 14 V
      K104-8 (B) - Body ground Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the Q50 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
      Q50-8 (BSSW) - K104-11 (D) Always Below 1 Ω
      Q50-8 (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

  6. INSPECT BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY)


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

      Click here

    2. A0021KEC16
      *a

      Component without harness connected

      (Blind Spot Monitor Main Switch (Warning Canceling Switch Assembly))

      Apply auxiliary battery voltage to the blind spot monitor main switch (warning canceling switch assembly) connector and check the operation of the blind spot monitor indicator, as shown in the table below.

      OK
      Tester Connection Condition Specified Condition

      Auxiliary battery positive (+) →

      Terminal 8 (B)

      Auxiliary battery negative (-) →

      Terminal 12 (E)

      		 Blind spot monitor main switch on (not protruding) Blind spot monitor indicator illuminates
      Blind spot monitor main switch off (protruding) Blind spot monitor indicator does not illuminate
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

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


    1. Disconnect the Q50 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
      Q50-3 (BIND) - K104-12 (E) Always Below 1 Ω
      Q50-3 (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