TOYOTA 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 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)

  • Parking assist ECU*1

  • Clearance warning ECU assembly*2

INSPECTION PROCEDURE

Note

If the DTC is output after repairs, turn the engine switch on (IG) and move the shift lever to R. Then clear the DTC.

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC C1AE9 is not output.

    NG

    REPLACE NO. 1 ULTRASONIC SENSOR (RR SENSOR) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  2. REPLACE NO. 1 ULTRASONIC SENSOR (RR SENSOR)


    1. Replace the No. 1 ultrasonic sensor (RR sensor) with a normally functioning one Click here.


    NEXT

  3. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AE9 is not output A
      DTC C1AE9 is output (w/ Side Mode System) B
      DTC C1AE9 is output (w/o Side Mode System) C

    B

    REPLACE PARKING ASSIST ECU Click here

    C

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    A

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