TOYOTA PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:C1AE9

DTC Code DTC Name
C1AE9 Rear Right Sensor Malfunction

DESCRIPTION

The No. 1 ultrasonic sensor (rear right sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear right sensor). If the No. 1 ultrasonic sensor (rear right sensor) has an open circuit or other malfunction, it will not function normally.

DTC No. DTC Detection Condition Trouble Area
C1AE9 A malfunction of the No. 1 ultrasonic sensor (rear right sensor).

  • No. 1 ultrasonic sensor (rear right sensor)

  • Clearance warning ECU assembly

INSPECTION PROCEDURE

Note

If DTCs are output after repairs, turn the engine switch on (IG) and turn the clearance sonar main switch on. Then clear the DTCs Click here.

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      Only DTC C1AE9 is output A
      DTC C1AE9 and C1AED are output B
      No DTCs are output C

    B

    GO TO DTC (C1AED) Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT SENSOR)


    1. Replace the No. 1 ultrasonic sensor (rear right sensor) with a known good one Click here.

      Tech Tips

      All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle.


    NEXT

  3. CHECK DTC OUTPUT


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      No DTCs are output OK
      DTC C1AE9 is output NG

    NG

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    OK

    END (REAR RIGHT SENSOR WAS DEFECTIVE)