DTC    C1AE1    Front Left Sensor Malfunction

for Preparation Click here


DESCRIPTION

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

DTC No.
DTC Detection Condition
Trouble Area
C1AE1
A malfunction of the No. 1 ultrasonic sensor (front left sensor).
  1. No. 1 ultrasonic sensor (front left sensor)
  2. Clearance warning ECU

INSPECTION PROCEDURE

NOTICE:
If the DTC is output after repairs, turn the power switch on (IG) and turn the LEXUS parking assist-sensor system on. Then clear the DTC (Click here).

1.CHECK DTC OUTPUT

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    Only DTC C1AE1 is output
    		A
    DTC C1AE1 and C1AEC are output
    		B
    No DTC is output
    		C



B
GO TO DTC (C1AEC) (Click here)

C
USE SIMULATION METHOD TO CHECK (Click here)
A


2.REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR)

  1. Replace the No. 1 ultrasonic sensor (front left sensor) with a known good one (Click here).

    HINT:
    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.


NEXT


3.CHECK DTC OUTPUT

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    No DTC is output
    		OK
    DTC C1AE1 is output
    		NG



NG
REPLACE CLEARANCE WARNING ECU ASSEMBLY (Click here)
OK

END (FRONT LEFT SENSOR WAS DEFECTIVE)