TOYOTA PARKING ASSIST-SENSOR SYSTEM (for 8 Sensor Type), Diagnostic DTC:C1AE1

DTC Code DTC Name
C1AE1 Front Left Sensor Malfunction

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
C1AE1 A malfunction of the No. 1 ultrasonic sensor (front left sensor).

  • No. 1 ultrasonic sensor (front left sensor)

  • Clearance warning ECU*1

  • Parking assist ECU*2

INSPECTION PROCEDURE

Note

If the DTC is output after repairs, turn the ignition switch to ON and turn the TOYOTA 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 C1AE1 is output A
      DTC C1AE1 and C1AEC are output B
      No DTC is output C

    B

    GO TO DTC (C1AEC) Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  2. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR)


    1. Replace the No. 1 ultrasonic sensor (front left 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 FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC C1AE1 is output (w/o Parking Assist Monitor System and/or Side Monitor System [for LHD]) A
      DTC C1AE1 is output (w/o Parking Assist Monitor System and/or Side Monitor System [for RHD]) B
      DTC C1AE1 is output (w/ Parking Assist Monitor System and/or Side Monitor System [for LHD]) C
      DTC C1AE1 is output (w/ Parking Assist Monitor System and/or Side Monitor System [for RHD]) D
      No DTC is output E

    B

    REPLACE CLEARANCE WARNING ECU Click here

    C

    REPLACE PARKING ASSIST ECU Click here

    D

    REPLACE PARKING ASSIST ECU Click here

    E

    END (NO. 1 ULTRASONIC SENSOR WAS DEFECTIVE)

    A

    REPLACE CLEARANCE WARNING ECU Click here