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.

Detection Item

DTC Detection Condition

Trouble Area

C1AE9

Rear Right Sensor Malfunction

A malfunction of the No. 1 ultrasonic sensor (rear right sensor).

  • No. 1 ultrasonic sensor (rear right sensor)

  • Clearance warning ECU (w/o Parking Assist Monitor System and/or Side MonitorSystem)

  • Parking assist ECU (w/ Parking Assist Monitor System and/or Side MonitorSystem)

CAUTION / NOTICE / HINT

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

      Body Electrical > Clearance Sonar > Trouble Codes

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

      Click here

      Tip:

      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

      Result

      NEXT
    NEXT

  3. CHECK FOR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > Clearance Sonar > Clear DTCs

    2. Check for DTCs.

      Click here

      Body Electrical > Clearance Sonar > Trouble Codes

      Result

      Result

      Proceed to

      DTC C1AE9 is output (w/o Parking Assist Monitor System and/or Side Monitor System)

      A

      DTC C1AE9 is output (w/ Parking Assist Monitor System and/or Side Monitor System)

      B

      No DTC is output

      C
    A

    REPLACE CLEARANCE WARNING ECU

    Click here

    B

    REPLACE PARKING ASSIST ECU

    Click here

    C

    END (NO. 1 ULTRASONIC SENSOR WAS DEFECTIVE)