TOYOTA PARKING ASSIST-SENSOR SYSTEM, 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 clearance warning ECU assembly 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 circuit or other malfunction, it will not function normally.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AE1 Front Left Sensor Malfunction A malfunction of the No. 1 ultrasonic sensor (front corner sensor LH)

  • Harness or connector

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

  • Clearance warning ECU assembly

WIRING DIAGRAM

A01MI0TE25

CAUTION / NOTICE / HINT

Note

If DTCs are output after repairs, turn the power switch on (IG) and turn the combination switch assembly (clearance sonar main switch) on. Then clear the DTCs.

Click here

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Clearance Sonar > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      DTC C1AE1 is not output A
      DTC C1AE1 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  2. CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR LH) - CLEARANCE WARNING ECU ASSEMBLY)


    1. Disconnect the A29 clearance warning ECU assembly connector.

    2. Disconnect the C1 No. 1 ultrasonic sensor (front corner sensor LH) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A29-21 (S6) - C1-2 (S) Always Below 1 Ω
      A29-22 (E6) - C1-1 (E) Always Below 1 Ω
      A29-21 (S6) or C1-2 (S) - Body ground Always 10 kΩ or higher
      A29-22 (E6) or C1-1 (E) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR LH)


    1. Remove the No. 1 ultrasonic sensor (front corner sensor LH).

      Click here

    2. Inspect the No. 1 ultrasonic sensor (front corner sensor LH).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  4. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Clearance Sonar > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Clearance Sonar > Trouble Codes
      Result
      Result Proceed to
      DTC C1AE1 is not output A
      DTC C1AE1 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE CLEARANCE WARNING ECU ASSEMBLY for RHD: Click here
    REPLACE CLEARANCE WARNING ECU ASSEMBLY for LHD: Click here