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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System (Except HV) - Circuit Tests (2 Of 8) >> CAN COMMUNICATION SYSTEM (for Gasoline Model) >> Blind Spot Monitor Sensor Communication Stop Mode [12/2019 - 10/2022] >> Procedure

Blind Spot Monitor Sensor Communication Stop Mode [12/2019 - 10/2022]: Procedure

  1. CHECK FOR OPEN IN CAN BUS LINES (BLIND SPOT MONITOR SENSOR LH BRANCH LINE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the M43 blind spot monitor sensor LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      M43-2 (CA1P) - M43-7 (CA1N) Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      GTY905110Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH)

      Result

      Result
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH) 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      M43-10 (BLGD) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
      GTY905101Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH)

      Result

      Result
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) 

    Result: 

    OK 

    See step  3

  3. CHECK VEHICLE TYPE 
    1. Check vehicle type.

      Result

      Result Proceed to
      w/ Stop and Start System A
      w/o Stop and Start System B

    Result: 

    B 

    See step  5

    Result: 

    A 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Reconnect the cable to the negative (-) battery terminal.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      M43-5 (BLB) - Body ground Ignition switch ON 10.5 to 16 V
      GTY905100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH)

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH 

    Refer to REMOVAL [12/2019 - 10/2022]

    Result: 

    NG 

    GO TO STOP AND START SYSTEM (FOR BACKUP BOOST CONVERTER CIRCUIT) 

    Refer to Backup Boost Converter Circuit [12/2019 - 10/2022]

  5. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Reconnect the cable to the negative (-) battery terminal.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      M43-5 (BLB) - Body ground Ignition switch ON 11 to 14 V
      GTY905100Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Blind Spot Monitor Sensor LH)

      Result

      Result
      OK
      NG

    Result: 

    OK 

    REPLACE BLIND SPOT MONITOR SENSOR LH 

    Refer to REMOVAL [12/2019 - 10/2022]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

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