TOYOTA PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:C1AED

DTC Code DTC Name
C1AED Rear Sensor Communication Circuit

DESCRIPTION

This DTC is stored when there is an open or short circuit in the communication line between the rear sensors and ECU, or when there is a malfunction in a rear sensor.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AED Rear Sensor Communication Circuit An open or short circuit in the communication line between the rear sensors and ECU or a malfunction in a rear sensor during initialization mode after the engine switch is turned on (IG).

  • Rear ultrasonic sensor circuit

  • Clearance warning ECU

WIRING DIAGRAM

B006N4XE29

PROCEDURE


  1. CHECK FOR DTC (C1AED)


    1. Clear the DTCs.

      Click here


      Body Electrical > Clearance Sonar > Clear DTCs

    2. Recheck for DTCs.

      Click here


      Body Electrical > Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      DTC C1AED is output A
      No DTC is output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - REAR CORNER ULTRASONIC SENSOR LH)


    1. Disconnect the G59 clearance warning ECU connector.

    2. Disconnect the T2 rear corner ultrasonic sensor LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G59-22 (BOR) - T2-1 (BI) Always Below 1 Ω
      G59-24 (SOR) - T2-3 (SI) Always Below 1 Ω
      G59-23 (E1) - T2-5 (EI) Always Below 1 Ω
      G59-22 (BOR) - Body ground Always 10 kΩ or higher
      G59-24 (SOR) - Body ground Always 10 kΩ or higher
      G59-23 (E1) - Body ground Always 10 kΩ or higher
      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (REAR CORNER ULTRASONIC SENSOR LH - REAR CENTER ULTRASONIC SENSOR LH)


    1. Disconnect the T2 rear corner ultrasonic sensor LH connector.

    2. Disconnect the T4 rear center ultrasonic sensor LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T2-2 (BO) - T4-1 (BI) Always Below 1 Ω
      T2-4 (SO) - T4-3 (SI) Always Below 1 Ω
      T2-6 (EO) - T4-5 (EI) Always Below 1 Ω
      T2-2 (BO) - Body ground Always 10 kΩ or higher
      T2-4 (SO) - Body ground Always 10 kΩ or higher
      T2-6 (EO) - Body ground Always 10 kΩ or higher
      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (REAR CENTER ULTRASONIC SENSOR LH - REAR CENTER ULTRASONIC SENSOR RH)


    1. Disconnect the T4 rear center ultrasonic sensor LH connector.

    2. Disconnect the T6 rear center ultrasonic sensor RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T4-2 (BO) - T6-1 (BI) Always Below 1 Ω
      T4-4 (SO) - T6-3 (SI) Always Below 1 Ω
      T4-6 (EO) - T6-5 (EI) Always Below 1 Ω
      T4-2 (BO) - Body ground Always 10 kΩ or higher
      T4-4 (SO) - Body ground Always 10 kΩ or higher
      T4-6 (EO) - Body ground Always 10 kΩ or higher
      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (REAR CENTER ULTRASONIC SENSOR RH - REAR CORNER ULTRASONIC SENSOR RH)


    1. Disconnect the T6 rear center ultrasonic sensor RH connector.

    2. Disconnect the T8 rear corner ultrasonic sensor RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T6-2 (BO) - T8-1 (BI) Always Below 1 Ω
      T6-4 (SO) - T8-3 (SI) Always Below 1 Ω
      T6-6 (EO) - T8-5 (EI) Always Below 1 Ω
      T6-2 (BO) - Body ground Always 10 kΩ or higher
      T6-4 (SO) - Body ground Always 10 kΩ or higher
      T6-6 (EO) - Body ground Always 10 kΩ or higher
      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT REAR CORNER ULTRASONIC SENSOR RH


    1. Remove the rear corner ultrasonic sensor RH.

      Click here

    2. Inspect the rear corner ultrasonic sensor RH.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPLACE REAR CORNER ULTRASONIC SENSOR RH Click here

    OK

  7. INSPECT REAR CENTER ULTRASONIC SENSOR RH


    1. Remove the rear center ultrasonic sensor RH.

      Click here

    2. Inspect the rear center ultrasonic sensor RH.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPLACE REAR CENTER ULTRASONIC SENSOR RH Click here

    OK

  8. INSPECT REAR CENTER ULTRASONIC SENSOR LH


    1. Remove the rear center ultrasonic sensor LH.

      Click here

    2. Inspect the rear center ultrasonic sensor LH.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPLACE REAR CENTER ULTRASONIC SENSOR LH Click here

    OK

  9. INSPECT REAR CORNER ULTRASONIC SENSOR LH


    1. Remove the rear corner ultrasonic sensor LH.

      Click here

    2. Inspect the rear corner ultrasonic sensor LH.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPLACE REAR CORNER ULTRASONIC SENSOR LH Click here

    OK

  10. REPLACE REAR CORNER ULTRASONIC SENSOR RH


    1. Replace the rear corner ultrasonic sensor RH with a normally functioning sensor.

      Click here

      Result
      Result
      NEXT

    NEXT

  11. CHECK FOR DTC (C1AED)


    1. Clear the DTCs.

      Click here


      Body Electrical > Clearance Sonar > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      DTC C1AED is output A
      No DTC is output B

    B

    END (REAR CORNER ULTRASONIC SENSOR RH WAS DEFECTIVE)

    A

  12. REPLACE REAR CENTER ULTRASONIC SENSOR RH


    1. Replace the rear center ultrasonic sensor RH with a normally functioning sensor.

      Click here

      Result
      Result
      NEXT

    NEXT

  13. CHECK FOR DTC (C1AED)


    1. Clear the DTCs.

      Click here


      Body Electrical > Clearance Sonar > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      DTC C1AED is output A
      No DTC is output B

    B

    END (REAR CENTER ULTRASONIC SENSOR RH WAS DEFECTIVE)

    A

  14. REPLACE REAR CENTER ULTRASONIC SENSOR LH


    1. Replace the rear center ultrasonic sensor LH with a normally functioning sensor.

      Click here

      Result
      Result
      NEXT

    NEXT

  15. CHECK FOR DTC (C1AED)


    1. Clear the DTCs.

      Click here


      Body Electrical > Clearance Sonar > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      DTC C1AED is output A
      No DTC is output B

    B

    END (REAR CENTER ULTRASONIC SENSOR LH WAS DEFECTIVE)

    A

  16. REPLACE REAR CORNER ULTRASONIC SENSOR LH


    1. Replace the rear corner ultrasonic sensor LH with a normally functioning sensor.

      Click here

      Result
      Result
      NEXT

    NEXT

  17. CHECK FOR DTC (C1AED)


    1. Clear the DTCs.

      Click here


      Body Electrical > Clearance Sonar > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      DTC C1AED is output A
      No DTC is output B

    A

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    B

    END (REAR CORNER ULTRASONIC SENSOR LH WAS DEFECTIVE)