TOYOTA PARKING ASSIST-SENSOR SYSTEM (w/ Multi-display), Diagnostic DTC:C1AE1

DTC Code DTC Name
C1AE1 Front Left Sensor Malfunction

DESCRIPTION

The No. 1 ultrasonic sensor (front corner sensor LH) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (front corner sensor LH). If the No. 1 ultrasonic sensor (front corner sensor LH) 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 corner sensor LH).

  • No. 1 ultrasonic sensor (front corner sensor LH)

  • Clearance warning ECU

INSPECTION PROCEDURE

Note

If the DTC is output after repairs, turn the engine switch on (IG) 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
      No DTC is output A
      Only DTC C1AE1 is output B
      DTC C1AE1 and C1AEC are output C

    B

    REPLACE NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR LH) Click here

    C

    GO TO DTC (C1AEC) Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  2. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR LH)


    1. Replace the No. 1 ultrasonic sensor (front corner sensor LH) 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
      No DTC is output A
      DTC C1AE1 is output (for LHD) B
      DTC C1AE1 is output (for RHD) C

    B

    REPLACE CLEARANCE WARNING ECU Click here

    C

    REPLACE CLEARANCE WARNING ECU Click here

    A

    END (NO. 1 ULTRASONIC SENSOR WAS DEFECTIVE)