TOYOTA PARKING ASSIST-SENSOR SYSTEM(for Sedan with Simple Intelligent Parking Assist System), Diagnostic DTC:C1AED

DTC Code DTC Name
C1AED Rear Sensor Communication Malfunction

DESCRIPTION

This DTC is stored when there is a short circuit in the communication line between the rear sensors and the ECU, or when there is a malfunction in a rear sensor.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AED Rear Sensor Communication Malfunction A short circuit in the communication line between the rear sensors and ECU or a malfunction in a rear sensor during initialization mode after the ignition switch is turned to ON.

  • ultrasonic sensor rear center

  • ultrasonic sensor rear corner

  • Harness or connector

  • Clearance warning ECU assembly

WIRING DIAGRAM

A01T9CBE04

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 - ULTRASONIC SENSOR (REAR SONARS))


    1. Disconnect the E98 clearance warning ECU assembly connector.

    2. Disconnect the R4 ultrasonic sensor rear corner (LH) connector.

    3. Disconnect the R3 ultrasonic sensor rear center (LH) connector.

    4. Disconnect the R2 ultrasonic sensor rear center (RH) connector.

    5. Disconnect the R1 ultrasonic sensor rear corner (RH) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E98-4 (BOR) - Body ground Always 10 kΩ or higher
      E98-4 (BOR) - E98-1 (E1) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT ULTRASONIC SENSOR REAR CORNER (LH)


    1. Remove the ultrasonic sensor rear corner (LH).

      Click here

    2. A01T9JOC01
      *a

      Component without harness connected

      (Ultrasonic Sensor Rear Corner (LH))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 (BI) - 1 (EI) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ULTRASONIC SENSOR REAR CORNER (LH) Click here

    OK

  3. INSPECT ULTRASONIC SENSOR REAR CENTER (LH)


    1. Remove the ultrasonic sensor rear center (LH).

      Click here

    2. A01T9JOC01
      *a

      Component without harness connected

      (Ultrasonic Sensor Rear Center (LH))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 (BI) - 1 (EI) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ULTRASONIC SENSOR REAR CENTER (LH) Click here

    OK

  4. INSPECT ULTRASONIC SENSOR REAR CENTER (RH)


    1. Remove the ultrasonic sensor rear center (RH).

      Click here

    2. A01T9JOC01
      *a

      Component without harness connected

      (Ultrasonic Sensor Rear Center (RH))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 (BI) - 1 (EI) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ULTRASONIC SENSOR REAR CENTER (RH) Click here

    OK

  5. INSPECT ULTRASONIC SENSOR REAR CORNER (RH)


    1. Remove the ultrasonic sensor rear corner (RH).

      Click here

    2. A01T9JOC01
      *a

      Component without harness connected

      (Ultrasonic Sensor Rear Corner (RH))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 (BI) - 1 (EI) Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG B

    A

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    B

    REPLACE ULTRASONIC SENSOR REAR CORNER (RH) Click here