CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM(w/ Steering Control): C1AAD; Vehicle Information Initialization Incomplete; 2018 - 2020 MY Sienna [11/2017

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM1000000018K3U
Model Year Start: 2018	Model: Sienna	Prod Date Range: [11/2017 - ]
Title: CRUISE CONTROL: LANE DEPARTURE ALERT SYSTEM(w/ Steering Control): C1AAD; Vehicle Information Initialization Incomplete; 2018 - 2020 MY Sienna [11/2017 - ]

DTC

C1AAD

Vehicle Information Initialization Incomplete

DESCRIPTION

When the forward recognition camera is replaced with a new one, the new forward recognition camera attempts to store the vehicle information received from the ECM. If the forward recognition camera cannot store the vehicle information, DTC C1AAD is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AAD	Vehicle Information Initialization Incomplete	2 seconds after the ignition switch is turned to ON, the vehicle information from the ECM cannot be stored.	CAN communication system Forward recognition camera ECM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.
Click here

PROCEDURE

1.	CHECK FOR DTCs (CAN COMMUNICATION DTC OUTPUT)

HINT:

The forward recognition camera communicates with the ECM via CAN communication. Confirm that the CAN communication system is functioning normally before proceeding.

(a) Check for DTCs.

Click here

Result	Proceed to
DTC U0100 is not output	A
DTC U0100 is output	B

GO TO CAN COMMUNICATION SYSTEM

2.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Chassis / Front Recognition Camera / Data List.

(e) Read the Data List according to the display on the Techstream.

Chassis / Front Recognition Camera / Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Vehicle Information (2WD/4WD)

Vehicle information

2WD, 4WD or Unknown

2WD: for 2WD

4WD: for AWD

Unknown: Vehicle information not confirmed

Vehicle Information (Conv/HV)

Vehicle information

Conv, HV or Unknown

Conv: Conventional

HV: Hybrid vehicle

Unknown: Vehicle information not confirmed

HINT:

If "Unknown" is displayed, the ECM cannot send vehicle information or the forward recognition camera cannot store the vehicle information. Check for DTCs, replace the ECM if necessary and recheck for DTCs. If the DTC is output again, replace the forward recognition camera.
If "Unknown" is not displayed, the DTC is stored even though the vehicle information is stored in the forward recognition camera. Replace the forward recognition camera.

Result	Proceed to
"Unknown" is displayed	A
"Unknown" is not displayed	B

REPLACE FORWARD RECOGNITION CAMERA

3.	CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM)

(a) Clear the DTCs.

Click here

(b) Perform the following procedure.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

Turn the ignition switch to ON and wait 2 seconds or more.

Click here

Result	Proceed to
DTC C1AAD is not output	A
DTC C1AAD is output	B

USE SIMULATION METHOD TO CHECK

4.	REPLACE ECM

(a) Replace the ECM.

Click here

5.	CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM)

(a) Clear the DTCs.

Click here

(b) Perform the following procedure.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

Turn the ignition switch to ON and wait 2 seconds or more.

Click here

Result	Proceed to
DTC C1AAD is not output	A
DTC C1AAD is output	B

END (ECM WAS DEFECTIVE)

REPLACE FORWARD RECOGNITION CAMERA