Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: Fr Sensor Initialization Incomplete (C1AF3)

DESCRIPTION

When it is judged that the front sensors have not been initialized, the clearance warning ECU assembly stores DTC C1AF3.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1AF3

Fr Sensor Initialization Incomplete

Front sensor not initialized

  • Initialize front sensor
  • Clearance warning ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

  • If DTC C1AF3 is output after performing repairs, turn the engine switch on (IG) and turn the intelligent clearance sonar system on to clear the DTC.

    Click here

  • After replacing an ultrasonic sensor or the clearance warning ECU assembly, perform the necessary procedures (adjustment, calibration, initialization or registration).

    Click here

PROCEDURE

1.

INITIALIZE FRONT CENTER ULTRASONIC SENSOR AND FRONT CORNER ULTRASONIC SENSOR

(a) Initialize the front center ultrasonic sensor and front corner ultrasonic sensor.

Click here

NEXT

2.

CHECK FOR DTC

(a) Using the Techstream, check for DTCs according to the prompts on the screen.

Click here

HINT:

After turning the engine switch from off to on (IG), wait 10 seconds or more before checking for DTCs.

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

Result

Proceed to

DTC C1AF3 is output

A

DTC C1AF3 is not output

B

HINT:

If DTC C1AF3 is still output after initializing the front center ultrasonic sensor and front corner ultrasonic sensor 3 times, replace the clearance warning ECU assembly.

A

REPLACE CLEARANCE WARNING ECU ASSEMBLY

B

END (FRONT SENSORS WERE NOT INITIALIZED)

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