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 [08/2017 - ]: 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, recharge or replace the battery before proceeding to the next step.
Result
Proceed to OK NG
Result:
NG
CHARGE OR REPLACE BATTERY
Result:
OK
See step 3
- Measure the battery voltage with the engine switch off.
- INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY*
- Adjust the reflector height.
Refer to ADJUSTMENT [09/2015 - ]
- Place the reflector.
Refer to ADJUSTMENT [09/2015 - ]
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream 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 offset and make a note.
Result
Proceed to NEXT
Result:
NEXT
See step 4
- Adjust the reflector height.
- CHECK CAN COMMUNICATION SYSTEM*
- Use the Techstream to check if the CAN communication system is functioning normally.
Refer to DIAGNOSIS SYSTEM [08/2017 - 08/2019] Refer to DIAGNOSIS SYSTEM [08/2019 - ]
Result
Result Proceed to CAN DTC is not output A CAN DTC is output B
Result:
B
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - 08/2020] Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - ]
Result:
A
See step 5
- Use the Techstream to check if the CAN communication system is functioning normally.
- INSPECT WARNING LIGHT
- Check the condition of the warning lights on the combination meter assembly.
Result
Result Proceed to Warning lights other than the PCS warning light are not illuminated or flashing A Warning lights other than the PCS warning light are illuminated or flashing B
Result:
B
GO TO MALFUNCTIONING SYSTEM
Result:
A
See step 6
- Check the condition of the warning lights on the combination meter assembly.
- 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 "Pre-collision System Unavailable", "Pre-collision System Unavailable Clean Sensor". "Pre-collision System Unavailable". "Forward Camera Systems Unavailable Clean Windshield" or "Forward Camera Systems Unavailable" is displayed B Warning message is not displayed C
Result:
B
GO TO PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [09/2015 - ]
Result:
C
CHECK CONDITIONS WHEN PRE-COLLISION SYSTEM DID NOT OPERATE. Refer to SYSTEM DESCRIPTION [08/2017 - ]
Result:
A
See step 7
- Check if a pre-collision system warning message is displayed on the multi-information display in the combination meter assembly.
- CHECK FOR DTC*
- Check for DTCs.
Refer to DTC CHECK / CLEAR [09/2015 - ]
- Record the DTCs.
- Clear the DTCs.
- Recheck for DTCs.
- Attempt to duplicate the malfunction and check if the DTCs are output again.
Refer to DTC CHECK / CLEAR [09/2015 - ]
Result
Result Proceed to DTCs are not output A DTCs are output B No DTCs are output, and malfunction cannot be duplicated or checked C - Attempt to duplicate the malfunction and check if the DTCs are output again.
Result:
B
GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2015 - ]
Result:
C
GO TO SYMPTOM SIMULATION. Refer to PROBLEM SYMPTOMS TABLE [09/2015 - ]
Result:
A
See step 8
- Check for DTCs.
- PROBLEM SYMPTOMS TABLE
- Refer to Problem Symptoms Table.
Refer to PROBLEM SYMPTOMS TABLE [09/2015 - ]
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 10
Result:
A
See step 9
- Refer to Problem Symptoms Table.
- OVERALL ANALYSIS AND TROUBLESHOOTING*
- Data List / Active Test
Refer to DATA LIST / ACTIVE TEST [09/2015 - ]
- Terminals of ECU
Refer to TERMINALS OF ECU [09/2015 - ]
Result
Proceed to NEXT
Result:
NEXT
See step 10
- Data List / Active Test
- ADJUST, REPAIR OR REPLACE
Result
Proceed to NEXT Result:
NEXT
See step 11
- 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.
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