Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
How To Proceed With Troubleshooting [11/2022 - ]: Procedure
- VEHICLE BROUGHT TO WORKSHOP
Result
Proceed to NEXT Result:
NEXT
See step 2
- PRE-CHECK
- Measure the auxiliary battery voltage with the ignition switch off.
Standard voltage
11 to 14 V
HINT:
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
- Check the fuses and relays.
- Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.
Result
Proceed to NEXT
Result:
NEXT
See step 3
- Measure the auxiliary battery voltage with the ignition switch off.
- CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*
- Using the GTS, check for CAN communication system DTCs.
for Gasoline Model: Refer to DIAGNOSIS SYSTEM [11/2022 - 11/2023] , or refer to DIAGNOSIS SYSTEM [11/2023 - 12/2024] , or refer to DIAGNOSIS SYSTEM [12/2024 - ]
for HEV Model: Refer to DIAGNOSIS SYSTEM [11/2022 - 12/2024] , or refer to DIAGNOSIS SYSTEM [12/2024 - ]
Result
Result Proceed to CAN DTCs are not output A CAN DTCs are output B
Result:
B
GO TO CAN COMMUNICATION SYSTEM
for Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2022 - 11/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - 12/2024] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2024 - ]
for HEV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2022 - 11/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - 12/2024] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2024 - ]
Result:
A
See step 4
- Using the GTS, check for CAN communication system DTCs.
- CHECK FOR DTCs*
- Using the GTS, check for DTCs.
Body Electrical > Front Radar Sensor > Trouble Codes
Result
Result Proceed to DTCs are not output A DTC C1A11-00 is output B DTCs other than C1A11-00 are output C
Result:
B
GO TO DIAGNOSTIC TROUBLE CODE CHART (C1A11-00)
Refer to DTC C1A11-00: Front Radar Sensor Optical Axis Misalignment Malfunction [11/2022 - ]
Result:
C
See step 7
Result:
A
See step 5
- Using the GTS, check for DTCs.
- CHECK VEHICLE CONTROL HISTORY*
- Using the GTS, check for Vehicle Control History (RoB).
Body Electrical > Front Radar Sensor > Utility
Tester Display Vehicle Control History (RoB) - Make a note of the output Vehicle Control History (RoB).
Result
Result Proceed to Vehicle Control History (RoB) codes are not output A Vehicle Control History (RoB) code X2024, X2025, X2026 or X2028 is output B Vehicle Control History (RoB) codes other than X2024, X2025, X2026 and X2028 are output C
Result:
A
USE SIMULATION METHOD TO CHECK
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2021 - ]
Result:
B
GO TO VEHICLE CONTROL HISTORY (X2024, X2025, X2026 or X2028)
Refer to VEHICLE CONTROL HISTORY (RoB) [11/2022 - ]
Result:
C
See step 6
- Using the GTS, check for Vehicle Control History (RoB).
- RECONFIRM VEHICLE CONTROL HISTORY*
- Using the GTS, clear the Vehicle Control History (RoB).
Body Electrical > Front Radar Sensor > Utility
Tester Display Vehicle Control History (RoB) - Using the GTS, check for Vehicle Control History (RoB).
Body Electrical > Front Radar Sensor > Utility
Tester Display Vehicle Control History (RoB) Result
Result Proceed to Vehicle Control History (RoB) codes are not output A Vehicle Control History (RoB) codes are output B
Result:
A
USE SIMULATION METHOD TO CHECK
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2021 - ]
Result:
B
GO TO VEHICLE CONTROL HISTORY
- Using the GTS, clear the Vehicle Control History (RoB).
- RECONFIRM DTC OUTPUT*
- Using the GTS, clear the DTCs.
Body Electrical > Front Radar Sensor > Clear DTCs
- Reproduce the vehicle conditions that were present when the DTCs that were noted were stored.
HINT:
Refer to each corresponding DTC for details on the detection conditions.
- Using the GTS, check for DTCs.
Body Electrical > Front Radar Sensor > Trouble Codes
Result
Result Proceed to DTCs are not output A DTCs are output B
Result:
A
See step 5
Result:
B
GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2022 - ]
- Using the GTS, clear the DTCs.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.