DESCRIPTION The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect objects in front of the vehicle.
When
the destination information in the millimeter wave radar sensor
assembly and driving support ECU assembly do not match, DTC C1A0A is
stored. |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | | C1A0A |
Front Radar Sensor Country Code Mismatch |
When
the engine switch is on (IG) and the dynamic radar cruise control
system is operating, the destination information in the driving support
ECU assembly and millimeter wave radar sensor assembly do not match for
approximately 1.3 seconds or more. |
- Millimeter wave radar sensor assembly
- Driving support ECU assembly
| Does not come on | CAUTION / NOTICE / HINT
NOTICE:
- Check that the millimeter wave radar sensor assembly has not been replaced with one from another vehicle.
- When replacing the driving support ECU assembly, always replace it with a
new one. If a driving support ECU assembly which was installed to
another vehicle is used, the information stored in the driving support
ECU assembly will not match the information from the vehicle. As a
result, a DTC may be stored.
- 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.
Click here 
- First check the CAN communication system by following How to Proceed
with Troubleshooting. After checking that there are no malfunctions in
the CAN communication system, proceed with troubleshooting.
Click here
PROCEDURE (a) Clear the DTCs. Powertrain > Radar Cruise2 > Clear DTCs
(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. Powertrain > Radar Cruise2 > Trouble Codes
|
Result | Proceed to | |
DTC C1A0A is not output |
A | | DTC C1A0A is output |
B |
| A |
 | USE SIMULATION METHOD TO CHECK |
|
B |
 | |
| 2. |
REPLACE DRIVING SUPPORT ECU ASSEMBLY | (a) Replace the driving support ECU assembly.
Click here
|
NEXT | |
| |
(a) Clear the DTCs. Powertrain > Radar Cruise2 > Clear DTCs
(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. Powertrain > Radar Cruise2 > Trouble Codes
|
Result | Proceed to | |
DTC C1A0A is not output |
A | | DTC C1A0A is output |
B |
| A |
| END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE) |
| B |
| REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY | |
