Toyota Avalon Service & Repair Manual: ICS Detection Area Adjustment Incomplete (C1AF0)

DESCRIPTION

When ICS detection area adjustment is incomplete, the clearance warning ECU assembly stores DTC C1AF0.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AF0	ICS Detection Area Adjustment Incomplete	ICS detection area adjustment incomplete	Intelligent clearance sonar detection area adjustment Clearance warning ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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After replacing an ultrasonic sensor or the clearance warning ECU assembly, perform the necessary procedures (adjustment, calibration, initialization or registration).
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When continuing with the inspection, confirm that the necessary procedures (adjustment, calibration, initialization or registration) have been completed before proceeding.

PROCEDURE

1.	INTELLIGENT CLEARANCE SONAR SYSTEM REGISTRATION

(a) Perform intelligent clearance sonar system registration.

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2.	CHECK FOR DTC

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

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

(b) Clear the DTCs according to the screen on the Techstream.

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

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

HINT:

If DTC C1AF0 is still output after performing intelligent clearance sonar system registration 3 times, replace the clearance warning ECU assembly.

Result	Proceed to
DTC C1AF0 is output	A
DTC C1AF0 is not output	B

REPLACE CLEARANCE WARNING ECU ASSEMBLY

USE SIMULATION METHOD TO CHECK

Toyota Avalon Service & Repair Manual > Occupant Classification System(for Gasoline Model): Initialization
INITIALIZATION DESCRIPTION (a) Zero point of the occupant classification sensors may deviate in the following situations. To ensure sensor accuracy, be sure to perform Zero Point Calibration. The occupant detection ECU is replaced. HINT: As the zero point is not automatically stored in a new occupan ...

Toyota Avalon Owners Manual