Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Front Left Sensor Malfunction (C1AE1)

DESCRIPTION

The front corner ultrasonic sensor LH is installed to the front bumper. The clearance warning ECU assembly detects obstacles based on signals received from the front corner ultrasonic sensor LH. If the front corner ultrasonic 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 front corner ultrasonic sensor LH.

  • Front corner 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.

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

Only DTC C1AE1 is output

A

DTC C1AE1 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 CORNER ULTRASONIC SENSOR LH

(a) Replace the front corner ultrasonic sensor LH 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

DTC C1AE1 is output

A

No DTCs are output

B

A

REPLACE CLEARANCE WARNING ECU ASSEMBLY

B

END (FRONT LEFT SENSOR WAS DEFECTIVE)

    Data List / Active Test
    DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a pa ...

    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 sens ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Rear Spoiler: Installation
    INSTALLATION PROCEDURE 1. INSTALL SIDE REAR SPOILER PROTECTOR SUB-ASSEMBLY LH (a) Install 3 new clips to the side rear spoiler protector sub-assembly LH. (b) Engage the 4 clips as shown in the illustration to install the side rear spoiler protector sub-assembly LH. Install in this Direction ...

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Transfer Assembly: Reassembly
    REASSEMBLY PROCEDURE 1. INSTALL REAR TRANSFER DRIVEN PINION BEARING (OUTER RACE) (a) Using SST and a press, install the rear transfer driven pinion bearing (outer race) to the transfer case sub-assembly. SST: 09950-60010 09951-00620 SST: 09950-70010 09951-07150 NOTICE: Keep the transfer case ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2025 Copyright www.lexusrx.net
    0.0146