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 RH 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

A01HVLBE04

INSPECTION PROCEDURE

Note

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

    NG

    READ VALUE USING TECHSTREAM Click here

    OK

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

  2. READ VALUE USING TECHSTREAM


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch to on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Body Electrical / Blind Spot Monitor Master / Data list.

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

      Blind Spot Monitor Master
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Main Switch Blind spot monitor main switch (warning canceling switch assembly) / ON or OFF

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

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

      		 -
      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

    INSPECT BLIND SPOT MONITOR MAIN SWITCH (WARNING CANCELING SWITCH ASSEMBLY) 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. A01HTKAE20
      Text in Illustration
      *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
      11 (B) - 8 (D) Blind spot monitor main switch assembly is on (not protruding) Below 1 Ω
      11 (B) - 8 (D) Blind spot monitor main switch assembly is off (protruding) 10 kΩ or higher

    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
      I10-11 (B) - Body ground Power switch on (IG) 11 to 14 V
      I10-11 (B) - Body ground Power switch off Below 1 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the O28 blind spot monitor sensor RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O28-8 (BSSW) - I10-8 (D) Always Below 1 Ω
      O28-8 (BSSW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BLIND SPOT MONITOR SENSOR RH Click here

  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. A01HTKAE21
      Text in Illustration
      *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
      Connection Condition Specified Condition

      Auxiliary battery positive (+) → Terminal 11 (B)

      Auxiliary battery negative (-) → Terminal 12 (E)

      		 Blind spot monitor main switch is on (not protruding) Blind spot monitor indicator illuminates
      Blind spot monitor main switch is off (protruding) Blind spot monitor indicator not illuminate

    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 RH)


    1. Disconnect the O28 blind spot monitor sensor RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O28-3 (BIND) - I10-12 (E) Always Below 1 Ω
      O28-3 (BIND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BLIND SPOT MONITOR SENSOR RH Click here