DESCRIPTION
When the vehicle is determined to be driving in a straight line or on a gradual curve based on signals from the yaw rate sensor, etc., the millimeter wave radar sensor assembly performs self diagnosis to check if the sensor beam axis has deviated. If the millimeter wave radar sensor assembly beam axis has deviated, the millimeter wave radar sensor assembly detects this and stores DTC C1A11.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
C1A11 |
Front Radar Sensor Incorrect Axial Gap |
When the ignition switch is ON, misalignment of the millimeter wave radar sensor assembly is detected for approximately 1 second or more. |
|
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. |
CHECK VEHICLE CONDITION |
(a) Check the operating conditions of the vehicle.
HINT:
DTC C1A11 may be stored if the millimeter wave radar sensor assembly beam axis is temporarily misaligned due to the vehicle being overloaded.
Result |
Proceed to |
---|---|
Vehicle is not overloaded or has not been towed |
A |
Vehicle is overloaded or has been towed |
B |
B | ![]() |
GO TO STEP 9 |
|
2. |
CHECK WHEEL ALIGNMENT |
(a) Check the wheel alignment (toe).
Click here
HINT:
DTC C1A11 may be stored if the millimeter wave radar sensor assembly beam axis is misaligned due to incorrect wheel alignment (toe).
Result |
Proceed to |
---|---|
Wheel is misaligned (toe) |
A |
Wheels are not misaligned (toe) |
B |
B | ![]() |
GO TO STEP 6 |
|
3. |
ADJUST WHEEL ALIGNMENT |
(a) Adjust the alignment (toe) of the wheels.
Click here
|
4. |
ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Perform millimeter wave radar sensor assembly adjustment.
Click here
|
5. |
CHECK FOR DTCs (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Click here
(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Click here
Result |
Proceed to |
---|---|
DTC C1A11 is not output |
A |
DTC C1A11 is output |
B |
A | ![]() |
END |
B | ![]() |
GO TO STEP 7 |
6. |
INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Check that the bracket of the millimeter wave radar sensor assembly is not deformed.
HINT:
If the bracket is deformed, replace the millimeter wave radar sensor assembly.
OK:
The bracket is not deformed.
OK | ![]() |
GO TO STEP 4 |
NG | ![]() |
GO TO STEP 7 |
7. |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Replace the millimeter wave radar sensor assembly.
Click here
(b) Adjust the millimeter wave radar sensor assembly.
Click here
|
8. |
CLEAR DTC (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Click here
NEXT | ![]() |
END |
9. |
ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Return the vehicle to normal.
(b) Perform millimeter wave radar sensor assembly adjustment.
Click here
|
10. |
CHECK FOR DTCs (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Click here
(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Click here
Result |
Proceed to |
---|---|
DTC C1A11 is not output |
A |
DTC C1A11 is output |
B |
A | ![]() |
END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS MISALIGNED DUE TO THE VEHICLE BEING OVERLOADED OR TOWED) |
|
11. |
CHECK WHEEL ALIGNMENT |
(a) Check the wheel alignment (toe).
Click here
HINT:
DTC C1A11 may be stored if the millimeter wave radar sensor assembly beam axis is misaligned due to incorrect wheel alignment (toe).
Result |
Proceed to |
---|---|
Wheel is misaligned (toe) |
A |
Wheels are not misaligned (toe) |
B |
A | ![]() |
GO TO STEP 3 |
B | ![]() |
GO TO STEP 7 |
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the blind spot monitor system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Precaution
PRECAUTION
1. IGNITION SWITCH EXPRESSIONS
(a) The type of ignition switch used on this model differs according to the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignition Switch (Position)
Engine ...
Rear Power Outlet Switch
Components
COMPONENTS
ILLUSTRATION
Inspection
INSPECTION
PROCEDURE
1. INSPECT MAIN SWITCH ASSEMBLY
(a) Check the main switch assembly.
(1) Measure the resistance according to the value(s) in the table below.
Text in Illustration
*a
Com ...