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 [11/2015 - 07/2020]: Procedure
- VEHICLE BROUGHT TO WORKSHOP
Result
Proceed to NEXT Result:
NEXT
See step 2
- INSPECT AUXILIARY BATTERY VOLTAGE
- Measure the auxiliary battery voltage with the power switch off.
Standard Voltage
11 to 14 V
If the voltage is below 11 V, replace or recharge the auxiliary battery before proceeding to the next step.
Result
Proceed to NEXT
Result:
NEXT
See step 3
- Measure the auxiliary battery voltage with the power switch off.
- 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 [11/2015 - 11/2017] , or refer to DIAGNOSIS SYSTEM [11/2017 - 12/2018] , or refer to DIAGNOSIS SYSTEM [12/2018 - 08/2019] , or refer to DIAGNOSIS SYSTEM [08/2019 - 07/2020]
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 [11/2015 - 12/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2018 -]
Result:
OK
See step 4
- Using the Techstream, check if the CAN communication system is functioning normally.
- CHECK FOR DTCs* (LANE DEPARTURE ALERT SYSTEM)
HINT:
Refer to DTC Check / Clear.
Refer to DTC CHECK / CLEAR [11/2015 - 07/2020]
- Check for DTCs and note any codes that are output.
Chassis > LKA/LDA > Trouble Codes
- Clear the DTCs.
Chassis > LKA/LDA > Clear DTCs
- Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs.
Chassis > LKA/LDA > Trouble Codes
Result
Result Proceed to DTCs are not output A DTCs are output B
Result:
B
GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2015 - 12/2018] , or refer to DIAGNOSTIC TROUBLE CODE CHART [12/2018 - 07/2020]
Result:
A
See step 5
- Check for DTCs and note any codes that are output.
- PROBLEM SYMPTOMS TABLE
HINT:
Refer to Problem Symptoms Table.
Refer to PROBLEM SYMPTOMS TABLE [11/2015 - 12/2018] , or refer to PROBLEM SYMPTOMS TABLE [12/2018 - 07/2020]
Result
Result Proceed to Fault is not listed in Problem Symptoms Table A Fault is listed in Problem Symptoms Table B Result:
B
See step 8
Result:
A
See step 6
- OVERALL ANALYSIS AND TROUBLESHOOTING*
- Terminals of ECU
Refer to TERMINALS OF ECU [11/2015 - 07/2020]
- Data List / Active Test
Refer to DATA LIST / ACTIVE TEST [11/2015 - 07/2020]
Result
Proceed to NEXT
Result:
NEXT
See step 7
- Terminals of ECU
- ADJUST, REPAIR OR REPLACE NOTE:
When the forward recognition camera is replaced with a new one, Forward Recognition Camera Learning must be performed.
Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [11/2015 - 07/2020]
Result
Proceed to NEXT Result:
NEXT
See step 8
- CONFIRMATION TEST
Result
Proceed to NEXT Result:
NEXT
END
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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.