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.
Diagnostic Trouble Codes Check/Clear
- If no DTC appears in normal mode:
On the OBD II scan tool or the hand-held tester, check the pending fault code using the Continuous Test Results function (Mode 7 for SAE J1979).
- When the diagnosis system is changed from normal mode to check mode or vice-versa, all DTCs and freeze frame data recorded in normal mode will be erased. Before changing modes, always check and make a note of DTCs and freeze frame data.
- CHECK DTC (Using the OBD II scan tool or hand-held tester)
- Connect the OBD II scan tool or hand-held tester to the DLC3.
- Turn the power switch ON (IG).
- Check DTCs and freeze frame data using the scan tool or the tester, and then write them down. For the hand-held tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
For the OBD II scan tool, see its instruction manual.
- See DIAGNOSTIC TROUBLE CODE CHART to confirm the details of the DTCs.
NOTE:- When simulating a symptom with the OBD II scan tool (excluding hand-held tester) to check the DTCs, use normal mode. For DTCs subject to "2 trip detection logic", perform either of the following actions.
- Turn the HV main system OFF (IG OFF) after the symptom is simulated once. Then repeat the simulation process again. When the problem has been simulated again, the MIL illuminates and the DTCs are recorded in the ECM.
- Check the pending fault code using the Continuous Test Results function (Mode 7 for SAE J1979) on the OBD II scan tool.
- CLEAR DTC
- Connect the OBD II scan tool or the hand-held tester to the DLC3.
- Turn the power switch ON (IG).
- Erase DTCs and freeze frame data using the OBD II scan tool or the hand-held tester.
For the hand-held tester:
- Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR CODES.
- Press YES.
- For the OBD II scan tool, see its instruction manual.NOTE: Clearing the DTCs will also clear the freeze frame data, detailed information and operation history data.
- CLEAR DTC (Not using the OBD II scan tool or hand-held tester)
- Remove the EFI and ECTS fuses from the engine room R/B for more than 60 seconds, or disconnecting the battery cable for more than 60 seconds.NOTE: When disconnecting the battery cable, perform the "INITIALIZE" procedure (See INITIALIZATION ).
- Remove the EFI and ECTS fuses from the engine room R/B for more than 60 seconds, or disconnecting the battery cable for more than 60 seconds.
Use the Manual With the Right Hardware
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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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