PARK ASSIST / MONITORING: INTELLIGENT CLEARANCE SONAR SYSTEM (for Gasoline Model): C1AF4; Rr Sensor Initialization Incomplete; 2019 - 2022 MY Avalon [04/2018

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001B5H1
Model Year Start: 2019	Model: Avalon	Prod Date Range: [04/2018 - ]
Title: PARK ASSIST / MONITORING: INTELLIGENT CLEARANCE SONAR SYSTEM (for Gasoline Model): C1AF4; Rr Sensor Initialization Incomplete; 2019 - 2022 MY Avalon [04/2018 - ]

DTC

C1AF4

Rr Sensor Initialization Incomplete

DESCRIPTION

When it is judged that the rear sensors have not been initialized, the clearance warning ECU assembly stores DTC C1AF4.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AF4	Rr Sensor Initialization Incomplete	Rear sensor not initialized	Initialize rear sensor Clearance warning ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

If DTC C1AF4 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 REAR CENTER ULTRASONIC SENSOR AND REAR CORNER ULTRASONIC SENSOR

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

Click here

2.	CHECK FOR DTC

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

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 C1AF4 is output	A
DTC C1AF4 is not output	B

HINT:

if DTC C1AF4 is still output after initializing the rear center ultrasonic sensor and rear corner ultrasonic sensor 3 times, replace the clearance warning ECU assembly.

REPLACE CLEARANCE WARNING ECU ASSEMBLY

END (REAR SENSORS WERE NOT INITIALIZED)