LEXUS PARKING ASSIST-SENSOR SYSTEM, Diagnostic DTC:C1AE9

DTC Code DTC Name
C1AE9 Rear Right Sensor Malfunction

DESCRIPTION

The rear corner ultrasonic sensor (rear right sensor) is installed on the front bumper. The clearance warning ECU assembly detects obstacles based on signals received from the rear corner ultrasonic sensor (rear right sensor). If the rear corner ultrasonic sensor (rear right sensor) has an open circuit or other malfunction, it will not function normally.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1AE9 Rear Right Sensor Malfunction A malfunction of the rear corner ultrasonic sensor (rear right sensor).

  • Rear corner ultrasonic sensor (rear right sensor)

  • Harness or connector

  • Clearance warning ECU assembly

WIRING DIAGRAM

B000WZGE29

CAUTION / NOTICE / HINT

Note

If DTCs are output after repairs, turn the engine switch on (IG) and the LEXUS parking assist-sensor system on. Then clear the DTCs.

Click here

PROCEDURE


  1. INSPECT REAR CORNER ULTRASONIC SENSOR (REAR RIGHT SENSOR)


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

      Click here

    2. Inspect the rear corner ultrasonic sensor (rear right sensor).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR CORNER ULTRASONIC SENSOR (REAR RIGHT SENSOR) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (REAR CORNER ULTRASONIC SENSOR [REAR RIGHT SENSOR] - CLEARANCE WARNING ECU ASSEMBLY)


    1. Disconnect the c1 rear corner ultrasonic sensor (rear right sensor) connector.

    2. Disconnect the X12 clearance warning ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      c1-2 (S) - X12-1 (S1) Always Below 1 Ω
      c1-1 (E) - X12-2 (E1) Always Below 1 Ω
      c1-2 (S) - Body ground Always 10 kΩ or higher
      c1-1 (E) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR