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 [08/2019 - ]: Procedure
- VEHICLE BROUGHT TO WORKSHOP
Result
Proceed to NEXT Result:
NEXT
See step 2
- INSPECT BATTERY VOLTAGE
- Measure the battery voltage with the engine switch off.
Standard voltage
11 to 14 V
If the voltage is below 11 V, replace or recharge the battery before proceeding to the next step.
Result
Proceed to NEXT
Result:
NEXT
See step 3
- Measure the battery voltage with the engine switch off.
- INSPECT MULTI-INFORMATION DISPLAY
- Check if a pre-collision system warning message is displayed on the multi-information display in the combination meter assembly.
Result
Result Proceed to "Pre-Collision System Malfunction Visit Your Dealer" is displayed A Any of the following messages is displayed: - "Pre-Collision System Unavailable"
- "Pre-Collision System Unavailable Clean Sensor"
- "Front Camera Unavailable"
- "Front Camera Unavailable See Owner's service information"
B Warning message is not displayed C
Result:
B
GO TO PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [08/2019 - ]
Result:
C
See step 6
Result:
A
See step 4
- Check if a pre-collision system warning message is displayed on the multi-information display in the combination meter assembly.
- CHECK CAN COMMUNICATION SYSTEM*
- Using the Techstream, check if the CAN communication system is functioning normally.
HINT:
Refer to CAN Bus Check in CAN Communication System.
Refer to DIAGNOSIS SYSTEM [08/2019 - 08/2020] , or refer to DIAGNOSIS SYSTEM [08/2020 - 08/2021] , or refer to DIAGNOSIS SYSTEM [08/2021 - ]
OK
CAN communication system is functioning normally.
Result
Proceed to OK NG
Result:
NG
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ]
Result:
OK
See step 5
- Using the Techstream, check if the CAN communication system is functioning normally.
- CHECK FOR DTCs* (PRE-COLLISION SYSTEM)
HINT:
Refer to DTC Check / Clear.
Refer to DTC CHECK / CLEAR [08/2019 - ]
- Check for DTCs and note any codes that are output.
- Clear the DTCs.
- Recheck for DTCs.
- Attempt to duplicate the malfunction and check if the DTCs are output again.
Result
Result Proceed to DTCs are not output A DTCs are output B
Result:
A
GO TO SYMPTOM SIMULATION. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - 08/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - 08/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2021 - 08/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2022 - ]
Result:
B
GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2019 - ]
- CHECK OPERATION AND NON-OPERATION CONDITIONS OF PRE-COLLISION SYSTEM
- Check the operation conditions and non-operation conditions of the pre-collision system.
Refer to PRECAUTION [08/2019 - ]
Result
Result Proceed to Not applicable A Applicable B
Result:
B
END
Result:
A
See step 7
- Check the operation conditions and non-operation conditions of the pre-collision system.
- INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY (BEAM AXIS MISALIGNMENT READING)*
- Adjust the reflector height.
Refer to ADJUSTMENT [08/2019 - ]
- Place the reflector.
Refer to ADJUSTMENT [08/2019 - ]
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream on.
- Turn the cruise control main switch on.
- Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Misalignment Reading.
- Check the amount of misalignment and make a note.
- Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Offset Reading.
- Check the amount of misalignment and make a note.
- Calculate the "Dealership Axis Offset Angle (with On-line Calibration Angle)" using the values "Front Beam Axis Misalignment Reading" and "Front Beam Axis Offset Reading".
- "Dealership Axis Offset Angle (with On-line Calibration Angle)" = "Front Beam Axis Misalignment Reading" - "Front Beam Axis Offset Reading"
Standard
Dealership Axis Offset Angle (with On-line Calibration Angle)
Vertical -2.2 to 1.6 deg. Horizontal -0.6 to 0.6 deg.
Result
Result Proceed to The dealership axis offset angle (with on-line calibration angle) is within the specified range. A The dealership axis offset angle (with on-line calibration angle) is not within the specified range. B - "Dealership Axis Offset Angle (with On-line Calibration Angle)" = "Front Beam Axis Misalignment Reading" - "Front Beam Axis Offset Reading"
Result:
B
See step 10
Result:
A
See step 8
- Adjust the reflector height.
- CHECK FORWARD RECOGNITION CAMERA INSTALLATION
- Check the installation condition of the forward recognition camera.
Refer to INSTALLATION [08/2019 - ]
HINT:
If there is deformation or deviation in the forward recognition camera installation bracket, replace the windshield glass.
OK
No deformation or deviation in forward recognition camera installation bracket.
Result
Proceed to OK NG
Result:
OK
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - 08/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - 08/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2021 - 08/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2022 - ]
Result:
NG
See step 9
- Check the installation condition of the forward recognition camera.
- ADJUST, REPAIR OR REPLACE
Result
Proceed to NEXT Result:
NEXT
END
- ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY
- Perform millimeter wave radar sensor assembly adjustment.
Refer to ADJUSTMENT [08/2019 - ]
Result
Proceed to NEXT
Result:
NEXT
See step 4
- Perform millimeter wave radar sensor assembly adjustment.
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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.
