Lexus NX: Front Right Sensor Malfunction (C1AE4)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AE4

Front Right Sensor Malfunction

A malfunction of the front corner ultrasonic sensor (FR sensor).

  • Front corner ultrasonic sensor (FR sensor)
  • Clearance warning ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

If DTCs are output after repairs, turn the power switch on (IG) and the intuitive parking assist system on. Then clear the DTCs.

Click here

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Check for DTCs.

Click here

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

Result

Proceed to

No DTCs are output

A

Only DTC C1AE4 is output

B

DTC C1AE4 and C1AEC are output

C

A

USE SIMULATION METHOD TO CHECK

C

GO TO DTC (C1AEC)

B

2.

REPLACE FRONT CORNER ULTRASONIC SENSOR (FR SENSOR)

(a) Replace the front corner ultrasonic sensor (FR 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

(a) Clear the DTCs.

Click here

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs

(b) Check for DTCs.

Click here

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

Result

Proceed to

No DTCs are output

A

DTC C1AE4 is output

B

A

END (FRONT CORNER ULTRASONIC SENSOR [FR SENSOR] WAS DEFECTIVE)

B

REPLACE CLEARANCE WARNING ECU ASSEMBLY

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