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 [12/2019 - 11/2023]: Procedure
- VEHICLE BROUGHT TO WORKSHOP
Result
Proceed to NEXT Result:
NEXT
See step 2
- CUSTOMER PROBLEM ANALYSIS
- Confirm problem symptoms.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]
Result
Proceed to NEXT
Result:
NEXT
See step 3
- Confirm problem symptoms.
- CHECK CAN COMMUNICATION SYSTEM*
- Using the GTS, check if the CAN communication system is functioning normally.
OK
CAN communication system is functioning normally.
HINT:
- Refer to Communication Bus Check in CAN Communication System.
for Gasoline Model: Refer to DIAGNOSIS SYSTEM [12/2019 - 09/2020] , or refer to DIAGNOSIS SYSTEM [09/2020 - 10/2022] , or refer to DIAGNOSIS SYSTEM [10/2022 - 11/2023]
for HV Model: Refer to DIAGNOSIS SYSTEM [12/2019 - 09/2020] , or refer to DIAGNOSIS SYSTEM [09/2020 - 10/2021] , or refer to DIAGNOSIS SYSTEM [10/2021 - 10/2022] , or refer to DIAGNOSIS SYSTEM [10/2022 - 11/2023]
- The occupant detection ECU is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there are no malfunctions in the CAN communication system.
Result
Proceed to OK NG - Refer to Communication Bus Check in CAN Communication System.
Result:
NG
GO TO CAN COMMUNICATION SYSTEM
for Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
for HV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2021 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]
Result:
OK
See step 4
- Using the GTS, check if the CAN communication system is functioning normally.
- PASSENGER AIRBAG ON/OFF INDICATOR CHECK
- Refer to Diagnosis System.
Refer to DIAGNOSIS SYSTEM [12/2019 - 10/2022] , or refer to DIAGNOSIS SYSTEM [10/2022 - 11/2023]
Result
Proceed to NEXT
Result:
NEXT
See step 5
- Refer to Diagnosis System.
- DTC CHECK (Present and History DTCs)*
- Refer to DTC Check / Clear.
Refer to DTC CHECK / CLEAR [12/2019 - 11/2023]
OK
DTCs are not output.
Result
Proceed to OK NG
Result:
OK
GO TO PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [12/2019 - 11/2023]
Result:
NG
See step 6
- Refer to DTC Check / Clear.
- DIAGNOSTIC TROUBLE CODE CHART
- Refer to Diagnostic Trouble Code Chart.
Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 10/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023]
Result
Proceed to NEXT
Result:
NEXT
See step 7
- Refer to Diagnostic Trouble Code Chart.
- CIRCUIT INSPECTION*
Result
Proceed to NEXT Result:
NEXT
See step 8
- REPAIR
Result
Proceed to NEXT Result:
NEXT
See step 9
- CLEAR DTCS (Present and History DTCs)*
- Refer to DTC Check / Clear.
Refer to DTC CHECK / CLEAR [12/2019 - 11/2023]
Result
Proceed to NEXT
Result:
NEXT
See step 10
- Refer to DTC Check / Clear.
- DTC CHECK*
- Refer to DTC Check / Clear.
Refer to DTC CHECK / CLEAR [12/2019 - 11/2023]
OK
DTCs are not output.
Result
Proceed to OK NG
Result:
NG
See step 6
Result:
OK
See step 11
- Refer to DTC Check / Clear.
- SYMPTOM SIMULATION
Result:
NEXT
See step 12
- 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.