TOYOTA PARKING ASSIST-SENSOR SYSTEM(for Hatchback), Diagnostic DTC:C1AE5

DTC Code DTC Name
C1AE5 Front Right Side Sensor

DESCRIPTION

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

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AE5 Front Right Side Sensor
  • A malfunction of the No. 1 ultrasonic sensor (front side RH).

  • A short or open in the harness or connector


  • No. 1 ultrasonic sensor (front side RH)

  • Harness or connector

  • Clearance warning ECU assembly

WIRING DIAGRAM

A01TC5KE06
*a Clearance Warning ECU Assembly
*b No. 1 Ultrasonic Sensor (Front Side RH)

CAUTION / NOTICE / HINT

Note


  • If DTCs are output after repairs, turn the ignition switch to ON and turn the back sonar or clearance sonar switch assembly on. Then clear the DTCs.

    Click here

  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization may be needed. Refer to Initialization.

    Click here

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 1 ULTRASONIC SENSOR (FRONT SIDE RH))


    1. Disconnect the E98 clearance warning ECU assembly connector.

    2. Disconnect the r1 No. 1 ultrasonic sensor (front side RH) connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E98-27 (E5) - r1-1 (EI) Always Below 1 Ω
      E98-23 (BOF) - r1-3 (BI) Always Below 1 Ω
      E98-7 (S9) - r1-2 (SI) Always Below 1 Ω
      E98-27 (E5) - E98-7 (S9) Always 10 kΩ or higher
      E98-23 (BOF) - E98-7 (S9) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  2. REPLACE NO. 1 ULTRASONIC SENSOR (FRONT SIDE RH)


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

      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.

      Result
      Proceed to
      NEXT

    NEXT
  3. CHECK DTC OUTPUT


    1. Clear the DTCs.


      Body Electrical > Clearance Sonar / Simple-IPA. > Clear DTCs
    2. Check for DTCs.


      Body Electrical > Clearance Sonar / Simple-IPA. > Trouble Codes
      OK
      No DTCs are output.
      Result
      Result Proceed to
      OK A
      NG B

    A
    B