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Home >> Toyota >> 2020 >> Mirai >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Intuitive Parking Assist System (W/ Parking Support Brake System) - Diagnostic Codes & Circuit Tests >> INTUITIVE PARKING ASSIST SYSTEM (w/ Parking Support Brake System) >> DTC C1AED: Rear Sensor Communication Malfunction [11/2018 - ] >> Procedure

DTC C1AED: Rear Sensor Communication Malfunction [11/2018 - ]: Procedure

  1. INITIALIZE REAR CENTER ULTRASONIC SENSOR AND REAR CORNER ULTRASONIC SENSOR 
    1. Initialize the rear center ultrasonic sensor and rear corner ultrasonic sensor.

      Refer to CALIBRATION [11/2018 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK DTC OUTPUT (C1AED) 
    1. According to the display on the Techstream, check for DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

    2. According to the display on the Techstream, clear the DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs 

    3. Recheck for DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

      Result

      Result Proceed to
      DTC C1AED is output A
      No DTCs are output B

    Result: 

    B 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - REAR CORNER ULTRASONIC SENSOR (RH)) 
    1. Disconnect the A29 clearance warning ECU assembly connector.
    2. Disconnect the X6 rear corner ultrasonic sensor (RH).
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A29-22 (BOR) - X6-4 (BI) Always Below 1 Ω
      A29-24 (SOR) - X6-5 (SI) Always Below 1 Ω
      A29-23 (E1) - X6-6 (EI) Always Below 1 Ω
      A29-22 (BOR) or X6-4 (BI) - Body ground Always 10 kΩ or higher
      A29-24 (SOR) or X6-5 (SI) - Body ground Always 10 kΩ or higher
      A29-23 (E1) or X6-6 (EI) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (REAR CORNER ULTRASONIC SENSOR (RH) - REAR CENTER ULTRASONIC SENSOR (RH)) 
    1. Disconnect the X7 rear center ultrasonic sensor (RH).
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      X6-1 (BO) - X7-4 (BI) Always Below 1 Ω
      X6-2 (SO) - X7-5 (SI) Always Below 1 Ω
      X6-3 (EO) - X7-6 (EI) Always Below 1 Ω
      X6-1 (BO) or X7-4 (BI) - Body ground Always 10 kΩ or higher
      X6-2 (SO) or X7-5 (SI) - Body ground Always 10 kΩ or higher
      X6-3 (EO) or X7-6 (EI) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (REAR CENTER ULTRASONIC SENSOR (RH) - REAR CENTER ULTRASONIC SENSOR (LH)) 
    1. Disconnect the X8 rear center ultrasonic sensor (LH).
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      X7-1 (BO) - X8-4 (BI) Always Below 1 Ω
      X7-2 (SO) - X8-5 (SI) Always Below 1 Ω
      X7-3 (EO) - X8-6 (EI) Always Below 1 Ω
      X7-1 (BO) or X8-4 (BI) - Body ground Always 10 kΩ or higher
      X7-2 (SO) or X8-5 (SI) - Body ground Always 10 kΩ or higher
      X7-3 (EO) or X8-6 (EI) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (REAR CENTER ULTRASONIC SENSOR (LH) - REAR CORNER ULTRASONIC SENSOR (LH)) 
    1. Disconnect the X9 rear corner ultrasonic sensor (LH).
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      X8-1 (BO) - X9-4 (BI) Always Below 1 Ω
      X8-2 (SO) - X9-5 (SI) Always Below 1 Ω
      X8-3 (EO) - X9-6 (EI) Always Below 1 Ω
      X8-1 (BO) or X9-4 (BI) - Body ground Always 10 kΩ or higher
      X8-2 (SO) or X9-5 (SI) - Body ground Always 10 kΩ or higher
      X8-3 (EO) or X9-6 (EI) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. INSPECT REAR CORNER ULTRASONIC SENSOR (RH) 
    1. Remove the X6 rear corner ultrasonic sensor (RH).
    2. Measure the resistance according to the value(s) in the table below.
      GTY565900Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Rear Corner Ultrasonic Sensor (RH))

      Standard Resistance

      Tester Connection Condition Specified Condition
      4 (BI) - 6 (EI) Always 10 kΩ or higher
      4 (BI) - 1 (BO) Always Below 1 Ω
      5 (SI) - 2 (SO) Always Below 30 Ω
      6 (EI) - 3 (EO) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR CORNER ULTRASONIC SENSOR (RH). Refer to  REMOVAL [11/2018 - ] 

    Result: 

    OK 

    See step  8

  8. INSPECT REAR CENTER ULTRASONIC SENSOR (RH) 
    1. Remove the X7 rear center ultrasonic sensor (RH).
    2. Measure the resistance according to the value(s) in the table below.
      GTY565900Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Rear Center Ultrasonic Sensor (RH))

      Standard Resistance

      Tester Connection Condition Specified Condition
      4 (BI) - 6 (EI) Always 10 kΩ or higher
      4 (BI) - 1 (BO) Always Below 1 Ω
      5 (SI) - 2 (SO) Always Below 30 Ω
      6 (EI) - 3 (EO) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR CENTER ULTRASONIC SENSOR (RH). Refer to  REMOVAL [11/2018 - ] 

    Result: 

    OK 

    See step  9

  9. INSPECT REAR CENTER ULTRASONIC SENSOR (LH) 
    1. Remove the X8 rear center ultrasonic sensor (LH).
    2. Measure the resistance according to the value(s) in the table below.
      GTY565900Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Rear Center Ultrasonic Sensor (LH))

      Standard Resistance

      Tester Connection Condition Specified Condition
      4 (BI) - 6 (EI) Always 10 kΩ or higher
      4 (BI) - 1 (BO) Always Below 1 Ω
      5 (SI) - 2 (SO) Always Below 30 Ω
      6 (EI) - 3 (EO) Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR CENTER ULTRASONIC SENSOR (LH). Refer to  REMOVAL [11/2018 - ] 

    Result: 

    OK 

    See step  10

  10. INSPECT REAR CORNER ULTRASONIC SENSOR (LH) 
    1. Remove the X9 rear corner ultrasonic sensor (LH).
    2. Measure the resistance according to the value(s) in the table below.
      GTY760552Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Rear Corner Ultrasonic Sensor (LH))

      Standard Resistance

      Tester Connection Condition Specified Condition
      4 (BI) - 6 (EI) Always 10 kΩ or higher
      4 (BI) - 1 Always Below 1 Ω
      5 (SI) - 2 Always Below 30 Ω
      6 (EI) - 3 Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE REAR CORNER ULTRASONIC SENSOR (LH). Refer to  REMOVAL [11/2018 - ] 

    Result: 

    OK 

    See step  11

  11. REPLACE REAR CORNER ULTRASONIC SENSOR (RH) 
    1. Replace the rear corner ultrasonic sensor (RH) with a known good one.

      See step  2

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  12

  12. CHECK DTC OUTPUT (C1AED) 
    1. According to the display on the Techstream, clear the DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs 

    2. According to the display on the Techstream, check for DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

      Result

      Result Proceed to
      DTC C1AED is output A
      No DTCs are output B

    Result: 

    B 

    END (REAR CORNER ULTRASONIC SENSOR (RH) WAS DEFECTIVE) 

    Result: 

    A 

    See step  13

  13. REPLACE REAR CENTER ULTRASONIC SENSOR (RH) 
    1. Replace the rear center ultrasonic sensor (RH) with a known good one.

      See step  2

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  14

  14. CHECK DTC OUTPUT (C1AED) 
    1. According to the display on the Techstream, clear the DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs 

    2. According to the display on the Techstream, check for DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

      Result

      Result Proceed to
      DTC C1AED is output A
      No DTCs are output B

    Result: 

    B 

    END (REAR CENTER ULTRASONIC SENSOR (RH) WAS DEFECTIVE) 

    Result: 

    A 

    See step  15

  15. REPLACE REAR CENTER ULTRASONIC SENSOR (LH) 
    1. Replace the rear center ultrasonic sensor (LH) with a known good one.

      See step  2

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  16

  16. CHECK DTC OUTPUT (C1AED) 
    1. According to the display on the Techstream, clear the DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs 

    2. According to the display on the Techstream, check for DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

      Result

      Result Proceed to
      DTC C1AED is output A
      No DTCs are output B

    Result: 

    B 

    END (REAR CENTER ULTRASONIC SENSOR (LH) WAS DEFECTIVE) 

    Result: 

    A 

    See step  17

  17. REPLACE REAR CORNER ULTRASONIC SENSOR (LH) 

    See step  2

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  18

  18. CHECK DTC OUTPUT (C1AED) 
    1. According to the display on the Techstream, clear the DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs 

    2. According to the display on the Techstream, check for DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

      Result

      Result Proceed to
      DTC C1AED is output A
      No DTCs are output B

    Result: 

    A 

    REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [11/2018 - ] 

    Result: 

    B 

    END (REAR CORNER ULTRASONIC SENSOR (LH) WAS DEFECTIVE) 

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