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Home >> Lexus >> 2018 >> RX 450h Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Intuitive Parking Assist System (W/ Intelligent Clearance Sonar System) (Diagnostic Codes & Circuit Tests) >> INTUITIVE PARKING ASSIST SYSTEM (w/ Intelligent Clearance Sonar System) >> DTC C1AED: Rear Sensor Communication Malfunction [08/2016 - 08/2019] >> Procedure

DTC C1AED: Rear Sensor Communication Malfunction [08/2016 - 08/2019]: Procedure

  1. INITIALIZE NO. 3 ULTRASONIC SENSOR AND NO. 4 ULTRASONIC SENSOR 
    1. Initialize the No. 3 ultrasonic sensor (rear left and rear right sensor) and No. 4 ultrasonic sensor (rear left center and rear right center sensor).

      Refer to CALIBRATION [08/2016 - 03/2018] , or refer to CALIBRATION [03/2018 - 08/2019]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK DTC OUTPUT (C1AED) 
    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

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

    2. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

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

    3. Recheck for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      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 [08/2016 - 12/2017]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 03/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2018 - 08/2019] 

    Result: 

    A 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - REAR RIGHT SENSOR) 
    1. Disconnect the J38 clearance warning ECU assembly connector.
    2. Disconnect the Y1 No. 3 ultrasonic sensor connector.
    3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      J38-22 (BOR) - Y1-4 (BI) Always Below 1 Ω
      J38-24 (SOR) - Y1-5 (SI) Always Below 1 Ω
      J38-23 (E1) - Y1-6 (EI) Always Below 1 Ω
      J38-22 (BOR) or Y1-4 (BI) - Body ground Always 10 kΩ or higher
      J38-24 (SOR) or Y1-5 (SI) - Body ground Always 10 kΩ or higher
      J38-23 (E1) or Y1-6 (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 RIGHT SENSOR - REAR RIGHT CENTER SENSOR) 
    1. Disconnect the Y2 No. 4 ultrasonic sensor connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Y1-1 (BO) - Y2-4 (BI) Always Below 1 Ω
      Y1-2 (SO) - Y2-5 (SI) Always Below 1 Ω
      Y1-3 (EO) - Y2-6 (EI) Always Below 1 Ω
      Y1-1 (BO) or Y2-4 (BI) - Body ground Always 10 kΩ or higher
      Y1-2 (SO) or Y2-5 (SI) - Body ground Always 10 kΩ or higher
      Y1-3 (EO) or Y2-6 (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 RIGHT CENTER SENSOR - REAR LEFT CENTER SENSOR) 
    1. Disconnect the Y3 No. 4 ultrasonic sensor connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Y2-1 (BO) - Y3-4 (BI) Always Below 1 Ω
      Y2-2 (SO) - Y3-5 (SI) Always Below 1 Ω
      Y2-3 (EO) - Y3-6 (EI) Always Below 1 Ω
      Y2-1 (BO) or Y3-4 (BI) - Body ground Always 10 kΩ or higher
      Y2-2 (SO) or Y3-5 (SI) - Body ground Always 10 kΩ or higher
      Y2-3 (EO) or Y3-6 (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 LEFT CENTER SENSOR - REAR LEFT SENSOR) 
    1. Disconnect the Y4 No. 3 ultrasonic sensor connector.
    2. Measure the resistance according to the value (s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      Y3-1 (BO) - Y4-4 (BI) Always Below 1 Ω
      Y3-2 (SO) - Y4-5 (SI) Always Below 1 Ω
      Y3-3 (EO) - Y4-6 (EI) Always Below 1 Ω
      Y3-1 (BO) or Y4-4 (BI) - Body ground Always 10 kΩ or higher
      Y3-2 (SO) or Y4-5 (SI) - Body ground Always 10 kΩ or higher
      Y3-3 (EO) or Y4-6 (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 NO. 3 ULTRASONIC SENSOR (REAR RIGHT SENSOR) 
    1. Measure the resistance according to the value (s) in the table below.
      GTY565900Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (No. 3 Ultrasonic Sensor (Rear Right Sensor))

      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 NO. 3 ULTRASONIC SENSOR (REAR RIGHT SENSOR). Refer to  REMOVAL [08/2016 - 03/2018]  , or refer to  REMOVAL [03/2018 - 08/2019] 

    Result: 

    OK 

    See step  8

  8. INSPECT NO. 4 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR) 
    1. Measure the resistance according to the value (s) in the table below.
      GTY565900Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (No. 4 Ultrasonic Sensor (Rear Right Center Sensor))

      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 NO. 4 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR). Refer to  REMOVAL [08/2016 - 03/2018]  , or refer to  REMOVAL [03/2018 - 08/2019] 

    Result: 

    OK 

    See step  9

  9. INSPECT NO. 4 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR) 
    1. Measure the resistance according to the value (s) in the table below.
      GTY565900Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (No. 4 Ultrasonic Sensor (Rear Left Center Sensor))

      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 NO. 4 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR). Refer to  REMOVAL [08/2016 - 03/2018]  , or refer to  REMOVAL [03/2018 - 08/2019] 

    Result: 

    OK 

    See step  10

  10. INSPECT NO. 3 ULTRASONIC SENSOR (REAR LEFT SENSOR) 
    1. Measure the resistance according to the value (s) in the table below.
      GTY565900Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (No. 3 Ultrasonic Sensor (Rear Left Sensor))

      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 NO. 3 ULTRASONIC SENSOR (REAR LEFT SENSOR). Refer to  REMOVAL [08/2016 - 03/2018]  , or refer to  REMOVAL [03/2018 - 08/2019] 

    Result: 

    OK 

    See step  11

  11. REPLACE NO. 3 ULTRASONIC SENSOR (REAR RIGHT SENSOR) 

    See step  2

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  12

  12. CHECK DTC OUTPUT (C1AED) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

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

    2. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      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 RIGHT SENSOR WAS DEFECTIVE) 

    Result: 

    A 

    See step  13

  13. REPLACE NO. 4 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR) 

    See step  2

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  14

  14. CHECK DTC OUTPUT (C1AED) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

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

    2. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      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 RIGHT CENTER SENSOR WAS DEFECTIVE) 

    Result: 

    A 

    See step  15

  15. REPLACE NO. 4 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR) 

    See step  2

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  16

  16. CHECK DTC OUTPUT (C1AED) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

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

    2. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      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 LEFT CENTER SENSOR WAS DEFECTIVE) 

    Result: 

    A 

    See step  17

  17. REPLACE NO. 3 ULTRASONIC SENSOR (REAR LEFT SENSOR) 

    See step  2

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  18

  18. CHECK DTC OUTPUT (C1AED) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

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

    2. Check for DTCs.

      Refer to DTC CHECK / CLEAR [08/2016 - ]

      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 [08/2016 - 03/2018]  , or refer to  REMOVAL [03/2018 - 08/2019] 

    Result: 

    B 

    END (REAR LEFT SENSOR WAS DEFECTIVE) 

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