Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Front Left Center Sensor (C1AE2)

DESCRIPTION

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AE2	Front Left Center Sensor	A malfunction of the front center ultrasonic sensor LH.	Front center ultrasonic sensor LH Clearance warning ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

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

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PROCEDURE

1.	CHECK DTC OUTPUT

(a) Check for DTCs.

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

Result	Proceed to
Only DTC C1AE2 is output	A
DTC C1AE2 and C1AEC are output	B
No DTCs are output	C

B

GO TO DTC (C1AEC)

C

USE SIMULATION METHOD TO CHECK

A

2.	REPLACE FRONT CENTER ULTRASONIC SENSOR LH

(a) Replace the front center ultrasonic sensor LH with a known good one.

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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.

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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
DTC C1AE2 is output	A
No DTCs are output	B

A

REPLACE CLEARANCE WARNING ECU ASSEMBLY

B

END (FRONT LEFT CENTER SENSOR WAS DEFECTIVE)