DTC Code | DTC Name |
---|---|
C1A11 | Front Radar Sensor Incorrect Axial Gap |
C1A14 | Front Radar Sensor Beam Axis Not Adjusted |
DESCRIPTION
The forward recognition camera uses the millimeter wave radar sensor assembly to detect obstacles in front of the vehicle.
When the vehicle is determined to be driving in a straight line or on a gradual curve based on signals from the yaw rate and acceleration sensor (yaw rate sensor) etc., the millimeter wave radar sensor assembly performs self diagnosis to check if the sensor beam axis has deviated from the vehicle movement direction. When the millimeter wave radar sensor assembly beam axis has deviated, the forward recognition camera detects this, and stores DTC C1A11.
After installing a new millimeter wave radar sensor assembly, if sensor beam axis adjustment is not performed, DTC C1A14 is stored.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
C1A11 | Front Radar Sensor Incorrect Axial Gap | 2 seconds after the engine switch is turned on (IG), misalignment of the millimeter wave radar sensor assembly is detected for approximately 5 seconds. |
|
C1A14 | Front Radar Sensor Beam Axis Not Adjusted | 2 seconds after the engine switch is turned on (IG), misalignment of the millimeter wave radar sensor assembly is detected for approximately 5 seconds. |
|
CAUTION / NOTICE / HINT
Note
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.
When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle. As a result, a DTC may be stored.
When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.
The forward recognition camera system uses the CAN communication system. First, confirm that there are no malfunction in the CAN communication system. Refer to How to Proceed with Troubleshooting.
for LHD: Click here
for RHD: Click here
PROCEDURE
CHECK DTC OUTPUT (FORWARD RECOGNITION CAMERA SYSTEM)
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Chassis / Front Recognition Camera / Trouble Codes.
Check for DTCs.
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B |
ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here |
C |
CLEAR DTC Click here |
A |
CHECK VEHICLE CONDITION
Check the operating conditions of the vehicle.
Tech Tips
DTC C1A11 may be stored if the millimeter wave radar sensor assembly beam axis is temporarily misaligned due to the vehicle being overloaded.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here |
A |
CHECK WHEEL ALIGNMENT
Check the front and rear wheel alignment (toe).
for front wheel alignment:
for rear wheel alignment:
Tech Tips
DTC C1A11 may be stored if the millimeter wave radar sensor assembly beam axis is misaligned due to incorrect wheel alignment (toe).
Result | ||||||
---|---|---|---|---|---|---|
|
B |
CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here |
A |
ADJUST WHEEL ALIGNMENT
Adjust the alignment (toe) of the wheels.
for front wheel alignment:
for fear wheel alignment:
Result | ||
---|---|---|
|
NEXT |
ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY
Perform millimeter wave radar sensor assembly adjustment.
Result | ||
---|---|---|
|
NEXT |
CHECK DTC OUTPUT (FORWARD RECOGNITION CAMERA SYSTEM)
Tech Tips
After performing the radar sensor beam axis adjustment, if the same DTC is output again after the DTC detection conditions are met, replace the misalignment of the millimeter wave radar sensor assembly.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Chassis / Front Recognition Camera / Trouble Codes.
Clear the DTCs.
Perform the following procedure.
Tech Tips
If the following procedure is not performed, the previously output DTC cannot be detected.
Turn the engine switch on (IG) and wait 7 seconds or more.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
A |
END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) |
B |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY Click here |
CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY
Check that the bracket of the millimeter wave radar sensor assembly is not deformed.
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
A |
GO TO STEP 5 Click here |
B |
REPLACE NO. 1 MILLIMETER WAVE RADAR SENSOR BRACKET Click here |
C |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY
Replace the millimeter wave radar sensor assembly with a new one.
Perform millimeter wave radar sensor assembly adjustment.
Result | ||
---|---|---|
|
NEXT |
CHECK DTC OUTPUT (FORWARD RECOGNITION CAMERA SYSTEM)
Tech Tips
After performing the radar sensor beam axis adjustment, if the same DTC is output again after the DTC detection conditions are met, replace the forward recognition camera.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Chassis / Front Recognition Camera / Trouble Codes.
Clear the DTCs.
Perform the following procedure.
Tech Tips
If the following procedure is not performed, the previously output DTC cannot be detected.
Turn the engine switch on (IG) and wait 7 seconds or more.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
A |
END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) |
B |
REPLACE FORWARD RECOGNITION CAMERA Click here |
REPLACE NO. 1 MILLIMETER WAVE RADAR SENSOR BRACKET
Replace the No. 1 millimeter wave radar sensor bracket with a new one.
Perform millimeter wave radar sensor assembly adjustment.
Clear the DTCs.
Result | ||
---|---|---|
|
NEXT |
END (NO. 1 MILLIMETER WAVE RADAR SENSOR BRACKET WAS DEFECTIVE) |
ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY
Return the vehicle to normal operating conditions.
Perform millimeter wave radar sensor assembly adjustment.
Clear the DTCs.
Note
When the vehicle is overloaded or towing something, it may not be possible to perform beam axis adjustment of the millimeter wave radar sensor assembly.
After clearing the DTCs, if the vehicle is overloaded or towing something, do not use the system.
The 2 conditions listed above do not indicate a malfunction of the millimeter wave radar sensor assembly.
Result | ||
---|---|---|
|
NEXT |
END |
ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY
Perform millimeter wave radar sensor assembly adjustment.
Result | ||
---|---|---|
|
NEXT |
CHECK DTC OUTPUT (FORWARD RECOGNITION CAMERA SYSTEM)
Tech Tips
After performing the radar sensor beam axis adjustment, if the same DTC is output again after the DTC detection conditions are met, replace the forward recognition camera.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Chassis / Front Recognition Camera / Trouble Codes.
Clear the DTCs.
Perform the following procedure.
Tech Tips
If the following procedure is not performed, the previously output DTC cannot be detected.
Turn the engine switch on (IG) and wait 7 seconds or more.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
A |
END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) |
B |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY
Replace the millimeter wave radar sensor assembly with a new one.
Perform millimeter wave radar sensor assembly adjustment.
Result | ||
---|---|---|
|
NEXT |
CHECK DTC OUTPUT (FORWARD RECOGNITION CAMERA SYSTEM)
Tech Tips
After performing the radar sensor beam axis adjustment, if the same DTC is output again after the DTC detection conditions are met, replace the forward recognition camera.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Chassis / Front Recognition Camera / Trouble Codes.
Clear the DTCs.
Perform the following procedure.
Tech Tips
If the following procedure is not performed, the previously output DTC cannot be detected.
Turn the engine switch on (IG) and wait 7 seconds or more.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
A |
END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) |
B |
REPLACE FORWARD RECOGNITION CAMERA Click here |
CLEAR DTC
Check for DTCs related to misalignment of millimeter wave radar sensor assembly.
Tech Tips
If only history DTCs are stored, they may have stored due to a temporarily condition such as overloading of the vehicle, and the system returned to normal when beam axis learning was performed.
Clear the DTCs.
Result | ||
---|---|---|
|
NEXT |
END |