Toyota Tacoma 2015-2018 Service Manual: FCM Destination Information Unmatched (C1AA1)

Toyota Tacoma 2015-2018 Service Manual / Cruise Control / Lane Departure Alert System / FCM Destination Information Unmatched (C1AA1)

DESCRIPTION

When the forward recognition camera is replaced with a new one, the new forward recognition camera attempts to store country specification information received from the main body ECU (multiplex network body ECU) and ECM. If the country specification information stored in the forward recognition camera is different from that stored in the main body ECU (multiplex network body ECU) or ECM, DTC C1AA1 is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AA1	FCM Destination Information Unmatched	3 seconds after the ignition switch is turned to ON, destination information stored in the forward recognition camera and that received from the main body ECU (multiplex network body ECU) or ECM do not match for 5 seconds or more.	CAN communication system Forward recognition camera Main body ECU (Multiplex network body ECU) 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 learning.
Click here

HINT:

This DTC is stored when the country specification information stored in the forward recognition camera and that stored in the main body ECU (multiplex network body ECU) do not match. If the forward recognition camera or main body ECU (multiplex network body ECU) has been replaced, check if a forward recognition camera or main body ECU (multiplex network body ECU) from another vehicle was used.

PROCEDURE

1.	CHECK DTC OUTPUT (CAN COMMUNICATION DTC OUTPUT)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

(e) Check for DTCs.

Click here

Result	Proceed to
DTC U0142 is not output	A
DTC U0142 is output	B

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

(e) Clear the DTCs.

Click here (f) Make sure that the DTC detection conditions are met.

(f) Make sure that the DTC detection conditions are met.

HINT:

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

(g) Check for DTCs.

Click here

Result	Proceed to
DTC C1AA1 is output	A
DTC C1AA1 is not output	B

USE SIMULATION METHOD TO CHECK

3.	REPLACE FORWARD RECOGNITION CAMERA

(a) Replace the forward recognition camera.

Click here (b) Adjust the forward recognition camera.

(b) Adjust the forward recognition camera.

Click here

4.	CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

(e) Clear the DTCs.

Click here (f) Make sure that the DTC detection conditions are met.

(f) Make sure that the DTC detection conditions are met.

HINT:

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

(g) Check for DTCs.

Click here

Result	Proceed to
DTC C1AA1 is output	A
DTC C1AA1 is not output	B

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)

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