LEXUS 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 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*1

  • Parking assist ECU*2

INSPECTION PROCEDURE

Note

If the DTC is output after repairs, turn the power switch on (IG) and turn the Lexus parking assist-sensor system on. Then clear the DTC 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 DTC is 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. A01NHV1E07
      Text in Illustration
      *1

      No. 1 Ultrasonic Sensor

      (Rear Right Sensor)

      Replace the No. 1 ultrasonic sensor (rear right sensor) with a normally functioning sensor 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

      DTC C1AE9 is output

      (w/o Parking Assist Monitor System)

      		 A

      DTC C1AE9 is output

      (w/ Parking Assist Monitor System)

      		 B
      No DTC is output C

    B

    REPLACE PARKING ASSIST ECU Click here

    C

    END (REAR RIGHT SENSOR WAS DEFECTIVE)

    A

    REPLACE CLEARANCE WARNING ECU Click here