LEMON Manuals: Even more car manuals for everyone
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 C1AEC: Front Sensor Communication Malfunction [11/2018 - ] >> Procedure

DTC C1AEC: Front Sensor Communication Malfunction [11/2018 - ]: Procedure

  1. INITIALIZE FRONT CENTER ULTRASONIC SENSOR AND FRONT CORNER ULTRASONIC SENSOR 
    1. Initialize the front center ultrasonic sensor and front corner ultrasonic sensor.

      Refer to CALIBRATION [11/2018 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK DTC OUTPUT (C1AEC) 
    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 C1AEC 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 - FRONT CORNER ULTRASONIC SENSOR (LH)) 
    1. Disconnect the A29 clearance warning ECU assembly connector.
    2. Disconnect the C3 front corner ultrasonic sensor (LH).
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A29-4 (BOF) - C3-4 (BI) Always Below 1 Ω
      A29-8 (SOF) - C3-5 (SI) Always Below 1 Ω
      A29-6 (E5) - C3-6 (EI) Always Below 1 Ω
      A29-4 (BOF) or C3-4 (BI) - Body ground Always 10 kΩ or higher
      A29-8 (SOF) or C3-5 (SI) - Body ground Always 10 kΩ or higher
      A29-6 (E5) or C3-6 (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 (FRONT CORNER ULTRASONIC SENSOR (LH) - FRONT CENTER ULTRASONIC SENSOR (LH)) 
    1. Disconnect the C4 front center ultrasonic sensor (LH).
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C3-1 (BO) - C4-4 (BI) Always Below 1 Ω
      C3-2 (SO) - C4-5 (SI) Always Below 1 Ω
      C3-3 (EO) - C4-6 (EI) Always Below 1 Ω
      C3-1 (BO) or C4-4 (BI) - Body ground Always 10 kΩ or higher
      C3-2 (SO) or C4-5 (SI) - Body ground Always 10 kΩ or higher
      C3-3 (EO) or C4-6 (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 (FRONT CENTER ULTRASONIC SENSOR (LH) - FRONT CENTER ULTRASONIC SENSOR (RH)) 
    1. Disconnect the C5 front center ultrasonic sensor (RH).
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C4-1 (BO) - C5-4 (BI) Always Below 1 Ω
      C4-2 (SO) - C5-5 (SI) Always Below 1 Ω
      C4-3 (EO) - C5-6 (EI) Always Below 1 Ω
      C4-1 (BO) or C5-4 (BI) - Body ground Always 10 kΩ or higher
      C4-2 (SO) or C5-5 (SI) - Body ground Always 10 kΩ or higher
      C4-3 (EO) or C5-6 (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 (FRONT CENTER ULTRASONIC SENSOR (RH) - FRONT CORNER ULTRASONIC SENSOR (RH)) 
    1. Disconnect the C6 front corner ultrasonic sensor (RH).
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C5-1 (BO) - C6-4 (BI) Always Below 1 Ω
      C5-2 (SO) - C6-5 (SI) Always Below 1 Ω
      C5-3 (EO) - C6-6 (EI) Always Below 1 Ω
      C5-1 (BO) or C6-4 (BI) - Body ground Always 10 kΩ or higher
      C5-2 (SO) or C6-5 (SI) - Body ground Always 10 kΩ or higher
      C5-3 (EO) or C6-6 (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 FRONT CORNER ULTRASONIC SENSOR (LH) 
    1. Remove the C3 front corner 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
      (Front Corner 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 FRONT CORNER ULTRASONIC SENSOR (LH). Refer to  REMOVAL [11/2018 - ] 

    Result: 

    OK 

    See step  8

  8. INSPECT FRONT CENTER ULTRASONIC SENSOR (LH) 
    1. Remove the C4 front 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
      (Front 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 FRONT CENTER ULTRASONIC SENSOR (LH). Refer to  REMOVAL [11/2018 - ] 

    Result: 

    OK 

    See step  9

  9. INSPECT FRONT CENTER ULTRASONIC SENSOR (RH) 
    1. Remove the C5 front 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
      (Front 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 FRONT CENTER ULTRASONIC SENSOR (RH). Refer to  REMOVAL [11/2018 - ] 

    Result: 

    OK 

    See step  10

  10. INSPECT FRONT CORNER ULTRASONIC SENSOR (RH) 
    1. Remove the C6 front corner ultrasonic sensor (RH).
    2. Measure the resistance according to the value(s) in the table below.
      GTY760556Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Front Corner Ultrasonic Sensor (RH))

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

    Result: 

    OK 

    See step  11

  11. REPLACE FRONT CORNER ULTRASONIC SENSOR (LH) 
    1. Replace the front corner ultrasonic sensor (LH) with a known good one.

      See step  2

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  12

  12. CHECK DTC OUTPUT (C1AEC) 
    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 C1AEC is output A
      No DTCs are output B

    Result: 

    B 

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

    Result: 

    A 

    See step  13

  13. REPLACE FRONT CENTER ULTRASONIC SENSOR (LH) 
    1. Replace the front center ultrasonic sensor (LH) with a known good one.

      See step  2

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  14

  14. CHECK DTC OUTPUT (C1AEC) 
    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 the DTCs.

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

      Result

      Result Proceed to
      DTC C1AEC is output A
      No DTCs are output B

    Result: 

    B 

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

    Result: 

    A 

    See step  15

  15. REPLACE FRONT CENTER ULTRASONIC SENSOR (RH) 
    1. Replace the front center ultrasonic sensor (RH) with a known good one.

      See step  2

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  16

  16. CHECK DTC OUTPUT (C1AEC) 
    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 C1AEC is output A
      No DTCs are output B

    Result: 

    B 

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

    Result: 

    A 

    See step  17

  17. REPLACE FRONT CORNER ULTRASONIC SENSOR (RH) 
    1. Replace the front corner ultrasonic sensor (RH) with a known good one.

      See step  2

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  18

  18. CHECK DTC OUTPUT (C1AEC) 
    1. According to the display on the Techstream, clear for 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 C1AEC is output A
      No DTCs are output B

    Result: 

    A 

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

    Result: 

    B 

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

scientia non olet · About LEMON Manuals