TOYOTA PARKING ASSIST-SENSOR SYSTEM(for Sedan without 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.

  • No. 3 ultrasonic sensor (rear corner LH, rear center LH, rear center RH or rear corner RH)

  • Harness or connector

  • Clearance warning ECU assembly

WIRING DIAGRAM

E282983E03

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

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 No. 3 ultrasonic sensor (rear corner LH) connector.

    3. Disconnect the R3 No. 3 ultrasonic sensor (rear center LH) connector.

    4. Disconnect the R2 No. 3 ultrasonic sensor (rear center RH) connector.

    5. Disconnect the R1 No. 3 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 NO. 3 ULTRASONIC SENSOR (REAR CORNER LH)

    1. Remove the No. 3 ultrasonic sensor (rear corner LH).

      Click here

    2. E270976C01

      *a

      Component without harness connected

      (No. 3 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 NO. 3 ULTRASONIC SENSOR (REAR CORNER LH)

    Click here

    OK

  3. INSPECT NO. 3 ULTRASONIC SENSOR (REAR CENTER LH)

    1. Remove the No. 3 ultrasonic sensor (rear center LH).

      Click here

    2. E270976C01

      *a

      Component without harness connected

      (No. 3 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 NO. 3 ULTRASONIC SENSOR (REAR CENTER LH)

    Click here

    OK

  4. INSPECT NO. 3 ULTRASONIC SENSOR (REAR CENTER RH)

    1. Remove the No. 3 ultrasonic sensor (rear center RH).

      Click here

    2. E270976C01

      *a

      Component without harness connected

      (No. 3 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 NO. 3 ULTRASONIC SENSOR (REAR CENTER RH)

    Click here

    OK

  5. INSPECT NO. 3 ULTRASONIC SENSOR (REAR CORNER RH)

    1. Remove the No. 3 ultrasonic sensor (rear corner RH).

      Click here

    2. E270976C01

      *a

      Component without harness connected

      (No. 3 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 NO. 3 ULTRASONIC SENSOR (REAR CORNER RH)

    Click here