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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Panoramic View Monitor System - Diagnostic Codes & Symptom Tests >> Panoramic View Monitor System >> DTC C1681-87: Front Camera Image Signal Missing Message [10/2022 - ] >> Procedure

DTC C1681-87: Front Camera Image Signal Missing Message [10/2022 - ]: Procedure

  1. CHECK FOR DTCs 
    1. Using the GTS, check for DTCs and proceed to the respective link below.

      Chassis > Circumference Monitoring Camera Control Module > Trouble Codes 

      Result

      Result Proceed to
      C1681-87 is output A
      DTC C1681-87 and either C1622-87, C168E-87, C169D-87 are output B

    Result: 

    B 

    PROCEED TO THE RESPECTIVE PROCEDURE 

    Refer to Image from Camera for Panoramic View Monitor is Abnormal [10/2022 - ] 

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - FRONT TELEVISION CAMERA ASSEMBLY) 

    Pre-procedure1

    1. Disconnect the H127 parking assist ECU connector.
    2. Disconnect the B9 front television camera assembly connector.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      H127-1 (CB+) - B9-2 (CB+) Always Below 1 Ω
      H127-3 (CV+) - B9-4 (CV+) Always Below 1 Ω
      H127-4 (CV-) - B9-3 (CV-) Always Below 1 Ω
      H127-2 (CGND) - B9-1 (CGND) Always Below 1 Ω
      H127-5 (SGND) - B9-5 (SGND) Always Below 1 Ω
      H127-1 (CB+) or B9-2 (CB+) - Body ground Always 10 kΩ or higher
      H127-3 (CV+) or B9-4 (CV+) - Body ground Always 10 kΩ or higher
      H127-4 (CV-) or B9-3 (CV-) - Body ground Always 10 kΩ or higher
      H127-2 (CGND) or B9-1 (CGND) - Body ground Always 10 kΩ or higher
      H127-5 (SGND) or B9-5 (SGND) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK PARKING ASSIST ECU (CV+, CV-) 

    Pre-procedure1

    1. Disconnect the H127 parking assist ECU connector.
      GTY1178767Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Parking Assist ECU)

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 (CV+) - Body ground Always 10 kΩ or higher
      4 (CV-) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. None

    Result: 

    NG 

    REPLACE PARKING ASSIST ECU 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    OK 

    See step  4

  4. CHECK PARKING ASSIST ECU (CB+, CGND) 

    Pre-procedure1

    1. Disconnect the front television camera assembly connector.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      B9-1 (CGND) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      B9-2 (CB+) - B9-1 (CGND) Ignition switch ON 7.5 to 8.5 V

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None

    Result: 

    OK 

    REPLACE FRONT TELEVISION CAMERA ASSEMBLY 

    Refer to REMOVAL [12/2019 - 11/2023] , or refer to REMOVAL [11/2023 - ]

    Result: 

    NG 

    REPLACE PARKING ASSIST ECU 

    Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

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