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 |
3 seconds after the ignition switch is turned to ON, the forward recognition camera cannot store the vehicle specification information. |
|
CAUTION / NOTICE / HINT
NOTICE:
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) |
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) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream 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 |
B | ![]() |
GO TO CAN COMMUNICATION SYSTEM |
|
2. |
CHECK DTC OUTPUT |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream 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.
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 C1AAA is output. |
A |
DTC C1AAA is not output. |
B |
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.
Click here
|
4. |
CHECK DTC OUTPUT |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream 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.
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 C1AAA is output |
A |
DTC C1AAA is not output |
B |
A | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
B | ![]() |
END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) |
Inspection
INSPECTION
PROCEDURE
1. INSPECT NO. 1 ULTRASONIC SENSOR
(a) Measure the resistance according to the value(s) in the table below.
Text in Illustration
*a
Component without harness connected:
(No. 1 Ultrasonic Sensor)
Standar ...
System Diagram
SYSTEM DIAGRAM
1. OVERALL CAN BUS DIAGRAM
(a) The CAN communication system is composed of 4 buses.
CAN Main Bus Line
Terminating Resistor
CAN Branch Line
*
Gateway Function Equipped ECU
...
Brake System Malfunction (C1A50)
DESCRIPTION
When the pre-collision system is operating, the millimeter wave radar sensor
assembly sends brake control signals to the skid control ECU (master cylinder solenoid)*1
or skid control ECU (brake actuator assembly)*2.
If the millimeter wave radar sensor assembly receives a vehicle st ...