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TOYOTA PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:C1AE1

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DTC Code DTC Name
C1AE1 Front Left Sensor Malfunction
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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 circuit or other malfunction, it will not function normally.

DTC No. 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 assembly
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INSPECTION PROCEDURE

Note:

If DTCs are output after repairs, turn the engine switch on (IG) and turn the clearance sonar main switch on. Then clear the DTCs (Click here).

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PROCEDURE


  1. Click here

    CHECK DTC OUTPUT


    1. Check for DTCs (Click here).

      Result
      Result Proceed to
      Only DTC C1AE1 is output A
      DTC C1AE1 and C1AEC are output B
      No DTCs are output C

  2. Click here

    REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR)


    1. Replace the No. 1 ultrasonic sensor (front left sensor) with a known good one (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.


  3. Click here

    CHECK DTC OUTPUT


    1. Clear the DTCs (Click here).

    2. Check for DTCs (Click here).

      Result
      Result Proceed to
      No DTCs are output OK
      DTC C1AE1 is output NG

  4. Click here

    REPLACE CLEARANCE WARNING ECU ASSEMBLYClick here

  5. Click here

    GO TO DTC (C1AEC)Click here

  6. Click here

    USE SIMULATION METHOD TO CHECKClick here

  7. Click here

    END (FRONT LEFT SENSOR WAS DEFECTIVE)