Toyota Tacoma 2015-2018 Service Manual: FCM Destination Information Uninitialized (C1AAA)

Toyota Tacoma 2015-2018 Service Manual / Cruise Control / Forward Recognition Camera System / FCM Destination Information Uninitialized (C1AAA)

DESCRIPTION

When the forward recognition camera is replaced with a new one, the new forward recognition camera attempts to store the country specification information received from the main body ECU (multiplex network body ECU). If the forward recognition camera cannot store the country specification information, DTC C1AAA is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1AAA	FCM Destination Information Uninitialized	After the ignition switch is turned to ON for 3 seconds or more, when the vehicle is being driven at a speed of 1 km/h (1 mph) or more, the forward recognition camera cannot store the vehicle specification information for 5 seconds or more.	CAN communication system Main body ECU (Multiplex network body ECU) Forward recognition camera

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 forward recognition camera cannot store the country specification information received from the main body ECU (multiplex network body ECU). 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 FOR DTCs (CAN COMMUNICATION DTC OUTPUT)

HINT:

The forward recognition camera communicates with the main body ECU (multiplex network body ECU) via CAN communication. Confirm that the CAN communication system is functioning normally before proceeding.

(a) 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 FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

(a) Clear the DTCs.

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

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

HINT:

If the conditions are not met, the system cannot detect the malfunction.

Click here

Result	Proceed to
DTC C1AAA is not output	A
DTC C1AAA is output	B

USE SIMULATION METHOD TO CHECK

3.	REPLACE FORWARD RECOGNITION CAMERA

(a) Replace the forward recognition camera.

Click here (b) Perform forward recognition camera axis adjustment.

(b) Perform forward recognition camera axis adjustment.

Click here

4.	CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

(a) Clear the DTCs.

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

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

HINT:

If the conditions are not met, the system cannot detect the malfunction.

Click here

Result	Proceed to
DTC C1AAA is not output	A
DTC C1AAA is output	B

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Front Camera Module Incorrect Axial Gap (C1AA8,C1AA9)

DESCRIPTION If the forward recognition camera detects that the forward recognition camera axis has deviated, DTC C1AA8 is stored. Also, if Forward Recognition Camera Axis Adjustment is not perfor ...

Vehicle Speed Sensor Circuit (C1AA3)

DESCRIPTION The forward recognition camera receives vehicle speed signals from the skid control ECU. If the skid control ECU receives a vehicle speed sensor malfunction signal, it informs the for ...

Other materials:

Utility
UTILITY NOTICE: If the forward recognition camera has been replaced with a new one or the windshield glass has been removed and installed, it is necessary to perform Forward Recognition Camera Axis Adjustment. If the system is turned on without performing Forward Recognition Ca ...

Communication Error from VSC to ECM Invalid Serial Data Received (P163081)
DESCRIPTION The skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 sends signals such as cruise control cancel signals and brake demand response signals to the ECM when the dynamic radar cruise control system is operating. DTC No. ...

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT FUEL CUT OPERATION (a) Start the engine and warm it up. (b) Increase the engine speed to at least 3500 rpm. (c) Use a sound scope to check for fuel injector assembly operation noise. (d) Check that when the accelerator pedal is released, fuel injector ...