LEXUS PARKING ASSIST-SENSOR SYSTEM(w/o Intelligent Clearance Sonar System), Diagnostic DTC:C1AE9

DTC Code DTC Name
C1AE9 Rear Right Sensor Malfunction

DESCRIPTION

The rear corner ultrasonic sensor (RR sensor) is installed to the rear bumper. The clearance warning ECU assembly detects obstacles based on signals received from the rear corner ultrasonic sensor (RR sensor). If the rear corner ultrasonic sensor (RR sensor) has an open circuit or other malfunction, it will not function normally.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AE9 Rear Right Sensor Malfunction A malfunction of the rear corner ultrasonic sensor (RR sensor).

  • Rear corner ultrasonic sensor (RR sensor)

  • Clearance warning ECU assembly

CAUTION / NOTICE / HINT

Note

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

Click here

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Check for DTCs.

      Click here


      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      No DTCs are output A
      Only DTC C1AE9 is output B
      DTC C1AE9 and C1AED are output C

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    GO TO DTC (C1AED) Click here

    B

  2. REPLACE REAR CORNER ULTRASONIC SENSOR (RR SENSOR)


    1. Replace the rear corner ultrasonic sensor (RR 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.

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK DTC OUTPUT


    1. Clear the DTCs.

      Click here


      Body Electrical > IPA/ICS/Clearance Sonar > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      No DTCs are output A
      DTC C1AE9 is output B

    A

    END (REAR CORNER ULTRASONIC SENSOR [RR SENSOR] WAS DEFECTIVE)

    B

    REPLACE CLEARANCE WARNING ECU ASSEMBLY for LHD: Click here
    REPLACE CLEARANCE WARNING ECU ASSEMBLY for RHD: Click here