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 |
Inspection
INSPECTION
PROCEDURE
1. INSPECT BRAKE BOOSTER PUMP ASSEMBLY
(a) Connect the positive (+) lead from the battery to the red cable of the pump,
and the negative (-) lead to the black cable.
(b) Check the brake booster pump operation.
OK:
Operation sound is heard. ...
Front Speed Sensor RH Output Malfunction (C1413,C1414)
DESCRIPTION
Refer to DTCs C1401 and C1402 (See page ).
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C1413
Front Speed Sensor RH Output Malfunction
Any of the following is detected:
An o ...
Electronic Circuit Inspection Procedure
ELECTRONIC CIRCUIT INSPECTION PROCEDURE
1. BASIC INSPECTION
(a) WHEN MEASURING RESISTANCE OF ELECTRONIC PARTS
(1) Unless otherwise stated, all resistance measurements should be made at an
ambient temperature of 20°C (68°F). Resistance measurements may be inaccurate if
measured at high tempe ...