CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)
REPLACE DRIVING SUPPORT ECU ASSEMBLY
CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM)
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY
ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY
DTC C1A0A Front Radar Sensor Region Code Mismatch |
DESCRIPTION
The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect obstacles in front of the vehicle.Based on this information, the driving support ECU assembly sends pre-crash control operation signals.
When the millimeter wave radar sensor assembly is replaced with a new one, it acquires the country specification information from the driving support ECU assembly. Also, when the driving support ECU assembly is replaced with a new one, it receives country specification information from the main body ECU (multiplex network body ECU). When country specification information in the millimeter wave radar sensor assembly, driving support ECU assembly and/or main body ECU do not match, DTC C1A0A is stored.
| DTC No. | DTC Detection Condition | Trouble Area |
| C1A0A | When the engine switch is on (IG), the country specification information from the driving support ECU assembly and millimeter wave radar sensor assembly do not match for approximately 2 second. |
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INSPECTION PROCEDURE
- NOTICE:
- 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 it will not match the information from the vehicle and a DTC may be stored.
- When replacing the millimeter wave radar sensor assembly, always replace it with a new one. When a new millimeter wave radar sensor assembly is installed to the vehicle, it receives vehicle information from the driving support ECU assembly and stores it. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly and millimeter wave radar sensor assembly will not match and 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.
- for LHD: Click here
- for RHD: Click here
| 1.CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM) |
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Pre-Crash 2 / Trouble Codes.
Clear the DTCs (Click here).
Make sure that the DTC detection conditions are met.
- HINT:
- If the detection conditions are not met, the system cannot detect the malfunction.
Check for DTCs (Click here).
| Result | Proceed to |
| DTC C1A0A is output | A |
| DTC C1A0A is not output | B |
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| A | |
| 2.REPLACE DRIVING SUPPORT ECU ASSEMBLY |
Replace the driving support ECU assembly (Click here).
| NEXT | |
| 3.CHECK DTC OUTPUT (PRE-CRASH SAFETY SYSTEM) |
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Pre-Crash 2 / Trouble Codes.
Clear the DTCs (Click here).
Make sure that the DTC detection conditions are met.
- HINT:
- If the detection conditions are not met, the system cannot detect the malfunction.
Check for DTCs (Click here).
| Result | Proceed to |
| DTC C1A0A is output | A |
| DTC C1A0A is not output | B |
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| ||||
| A | |
| 4.REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
Replace the millimeter wave radar sensor assembly (Click here).
| NEXT | |
| 5.ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
Adjust the millimeter wave radar sensor assembly (Click here).
| NEXT | ||
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