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 [11/2024 - ]: Procedure
- VEHICLE BROUGHT TO WORKSHOP
Result
Proceed to NEXT Result:
NEXT
See step 2
- CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK
Result
Proceed to NEXT Result:
NEXT
See step 3
- INSPECT AUXILIARY BATTERY VOLTAGE
- Measure the auxiliary battery voltage with ignition switch off.
Standard voltage
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
Result
Proceed to NEXT
Result:
NEXT
See step 4
- Measure the auxiliary battery voltage with ignition switch off.
- INSPECT CAN COMMUNICATION SYSTEM*
- Use the Techstream to check if the CAN communication system is functioning normally.
- for HV Model:
Refer to DIAGNOSIS SYSTEM [11/2024 - ]
- for Gasoline Model:
Refer to DIAGNOSIS SYSTEM [11/2024 - ]
Result
Result Proceed to CAN communication system DTCs are not output A CAN communication system DTCs are output B - for HV Model:
Result:
B
GO TO CAN COMMUNICATION SYSTEM
for HV Model:
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2019 - ]
for Gasoline Model:
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
Result:
A
See step 5
- Use the Techstream to check if the CAN communication system is functioning normally.
- CHECK FOR VEHICLE CONTROL HISTORY* (FRONT RECOGNITION CAMERA (FRONT LIGHTING CONTROL))
HINT:
Refer to Vehicle Control History.
Refer to VEHICLE CONTROL HISTORY [11/2024 - ]
- Check for vehicle control history and note any codes that are output.
Body Electrical > Front Recognition Camera (Front Lighting Control) > Utility
Tester Display Vehicle Control History (RoB) Body Electrical > Main Body > Utility
Tester Display Vehicle Control History (RoB) Result
Result Proceed to No vehicle control history is output A Vehicle control history is output B
Result:
B
GO TO VEHICLE CONTROL HISTORY
Refer to VEHICLE CONTROL HISTORY [11/2024 - ]
Result:
A
See step 6
- Check for vehicle control history and note any codes that are output.
- PROBLEM SYMPTOMS TABLE
- Refer to Problem Symptoms Table.
Refer to PROBLEM SYMPTOMS TABLE [12/2021 - ]
Result
Result Proceed to Fault is not listed in Problem Symptoms Table A Fault is listed in Problem Symptoms Table B
Result:
B
GO TO PROBLEM SYMPTOMS TABLE
Refer to PROBLEM SYMPTOMS TABLE [12/2021 - ]
Result:
A
See step 7
- Refer to Problem Symptoms Table.
- OVERALL ANALYSIS AND TROUBLESHOOTING*
- Data List / Active Test
Refer to DATA LIST / ACTIVE TEST [11/2024 - ]
- Terminals of ECU
Refer to TERMINALS OF ECU [12/2021 - ]
- Inspection
Result
Proceed to NEXT
Result:
NEXT
See step 8
- Data List / Active Test
- ADJUST, REPAIR OR REPLACE
Result
Proceed to NEXT Result:
NEXT
See step 9
- 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.