TOYOTA PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:C1AED

DTC Code DTC Name
C1AED Rear Sensor Communication Malfunction

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
C1AED 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).

  • No. 2 ultrasonic sensor (rear side)

  • Harness or connector

  • Clearance warning ECU assembly

WIRING DIAGRAM

B001XJSE08

CAUTION / NOTICE / HINT

Note

If DTCs are output after repairs, turn the engine switch on (IG) and turn the TOYOTA parking assist-sensor system on. Then clear the DTCs Click here.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      No DTC is output. A
      DTC C1AED is output. B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  2. CHECK HARNESS AND CONNECTOR (NO. 2 ULTRASONIC SENSOR [REAR CORNER SENSOR RH] - CLEARANCE WARNING ECU ASSEMBLY)


    1. Disconnect the O13 No. 2 ultrasonic sensor (rear corner sensor RH) connector.

    2. Disconnect the F92 clearance warning ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F92-22 (BOR) - O13-1 (BI) Always Below 1 Ω
      F92-24 (SOR) - O13-3 (SI) Always Below 1 Ω
      F92-23 (E1) - O13-5 (EI) Always Below 1 Ω
      F92-22 (BOR) - Body ground Always 10 kΩ or higher
      F92-24 (SOR) - Body ground Always 10 kΩ or higher
      F92-23 (E1) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 2 ULTRASONIC SENSOR [REAR CORNER SENSOR RH] - NO. 2 ULTRASONIC SENSOR [REAR CENTER SENSOR RH])


    1. Disconnect the O13 No. 2 ultrasonic sensor (rear corner sensor RH) connector.

    2. Disconnect the O14 No. 2 ultrasonic sensor (rear center sensor RH) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O13-2 (BO) - O14-1 (BI) Always Below 1 Ω
      O13-4 (SO) - O14-3 (SI) Always Below 1 Ω
      O13-6 (EO) - O14-5 (EI) Always Below 1 Ω
      O13-2 (BO) - Body ground Always 10 kΩ or higher
      O13-4 (SO) - Body ground Always 10 kΩ or higher
      O13-6 (EO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 2 ULTRASONIC SENSOR [REAR CENTER SENSOR RH] - NO. 2 ULTRASONIC SENSOR [REAR CENTER SENSOR LH])


    1. Disconnect the O14 No. 2 ultrasonic sensor (rear center sensor RH) connector.

    2. Disconnect the O15 No. 2 ultrasonic sensor (rear center sensor LH) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O14-2 (BO) - O15-1 (BI) Always Below 1 Ω
      O14-4 (SO) - O15-3 (SI) Always Below 1 Ω
      O14-6 (EO) - O15-5 (EI) Always Below 1 Ω
      O14-2 (BO) - Body ground Always 10 kΩ or higher
      O14-4 (SO) - Body ground Always 10 kΩ or higher
      O14-6 (EO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (NO. 2 ULTRASONIC SENSOR [REAR CENTER SENSOR LH] - NO. 1 ULTRASONIC SENSOR [REAR CORNER SENSOR LH])


    1. Disconnect the O15 No. 2 ultrasonic sensor (rear center sensor LH) connector.

    2. Disconnect the O16 No. 2 ultrasonic sensor (rear corner sensor LH) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      O15-2 (BO) - O16-1 (BI) Always Below 1 Ω
      O15-4 (SO) - O16-3 (SI) Always Below 1 Ω
      O15-6 (EO) - O16-5 (EI) Always Below 1 Ω
      O15-2 (BO) - Body ground Always 10 kΩ or higher
      O15-4 (SO) - Body ground Always 10 kΩ or higher
      O15-6 (EO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT NO. 2 ULTRASONIC SENSOR (REAR CORNER SENSOR RH)


    1. Remove the No. 2 ultrasonic sensor (rear corner sensor RH) Click here.

    2. Inspect the No. 2 ultrasonic sensor (rear corner sensor RH) Click here.


    NG

    REPLACE NO. 2 ULTRASONIC SENSOR (REAR CORNER SENSOR RH)

    OK

  7. INSPECT NO. 2 ULTRASONIC SENSOR (REAR CENTER SENSOR RH)


    1. Remove the No. 2 ultrasonic sensor (rear center sensor RH) Click here.

    2. Inspect the No. 2 ultrasonic sensor (rear center sensor RH) Click here.


    NG

    REPLACE NO. 2 ULTRASONIC SENSOR (REAR CENTER SENSOR RH)

    OK

  8. INSPECT NO. 2 ULTRASONIC SENSOR (REAR CENTER SENSOR LH)


    1. Remove the No. 2 ultrasonic sensor (rear center sensor LH) Click here.

    2. Inspect the No. 2 ultrasonic sensor (rear center sensor LH) Click here.


    NG

    REPLACE NO. 2 ULTRASONIC SENSOR (REAR CENTER SENSOR LH)

    OK

  9. INSPECT NO. 2 ULTRASONIC SENSOR (REAR CORNER SENSOR LH)


    1. Remove the No. 2 ultrasonic sensor (rear corner sensor LH) Click here.

    2. Inspect the No. 2 ultrasonic sensor (rear corner sensor LH) Click here.


    NG

    REPLACE NO. 2 ULTRASONIC SENSOR (REAR CENTER SENSOR LH)

    OK

  10. REPLACE NO. 2 ULTRASONIC SENSOR (REAR CORNER SENSOR RH)


    1. Replace the No. 2 ultrasonic sensor (rear corner sensor RH) with a normally functioning sensor Click here.


    NEXT

  11. CHECK FOR DTC (C1AED)


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AED is output. A
      No DTC is output. B

    B

    END (NO. 2 ULTRASONIC SENSOR [REAR CORNER SENSOR RH] IS DEFECTIVE)

    A

  12. REPLACE NO. 2 ULTRASONIC SENSOR (REAR CENTER SENSOR RH)


    1. Replace the No. 2 ultrasonic sensor (rear center sensor RH) with a normally functioning sensor Click here.


    NEXT

  13. CHECK FOR DTC (C1AED)


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AED is output. A
      No DTC is output. B

    B

    END (NO. 2 ULTRASONIC SENSOR [REAR CENTER SENSOR RH] IS DEFECTIVE)

    A

  14. REPLACE NO. 2 ULTRASONIC SENSOR (REAR CENTER SENSOR LH)


    1. Replace the No. 2 ultrasonic sensor (rear center sensor LH) with a normally functioning sensor Click here.


    NEXT

  15. CHECK FOR DTC (C1AED)


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AED is output. A
      No DTC is output. B

    B

    END (NO. 2 ULTRASONIC SENSOR [REAR CENTER SENSOR LH] IS DEFECTIVE)

    A

  16. REPLACE NO. 2 ULTRASONIC SENSOR (REAR CORNER SENSOR LH)


    1. Replace the No. 2 ultrasonic sensor (rear corner sensor LH) with a normally functioning sensor Click here.


    NEXT

  17. CHECK FOR DTC (C1AED)


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AED is output. A
      No DTC is output. B

    A

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    B

    END (NO. 2 ULTRASONIC SENSOR [REAR CORNER SENSOR LH] IS DEFECTIVE)