LEXUS PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:C1AE9

DTC Code DTC Name
C1AE9 Rear Right Sensor Malfunction

DESCRIPTION

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

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

  • No. 1 ultrasonic sensor (RR sensor)

  • Clearance warning ECU assembly

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK FOR DTC


    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 (RR SENSOR)


    1. Replace the No. 1 ultrasonic sensor (RR sensor) with a normally functioning 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 FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC C1AE9 is not output.

    NG

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    OK

    END (NO. 1 ULTRASONIC SENSOR [RR SENSOR] WAS DEFECTIVE)