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.
Confirmation Driving Pattern
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for 30 seconds.
- Turn the power switch on (IG) and turn the Techstream on [A].
- Put the engine in inspection mode. Refer to INSPECTION MODE PROCEDURE .
- Start the engine and warm it up until the engine coolant temperature reaches 70°C (158°F) or more [B].
HINT:
The A/C switch and all accessory switches should be off and shift position in P or N.
- Drive the vehicle at 25 to 37 mph (40 to 60 km/h) for 5 minutes or more [C].
- Idle the engine for 30 seconds or more [D].
- Accelerate the vehicle to 25 to 37 mph (40 to 60 km/h) with the shift lever in B [E].
- Perform fuel cut operation for 5 seconds or more, with the accelerator pedal fully released [F].WARNING:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
When fuel cut is operating "Idle Fuel Cut" in Data List is ON.
- Enter the following menus: Powertrain / Engine and ECT / Monitor / Exhaust Gas Recirculation/VVT / Status2 [G].
- Check that the Exhaust Gas Recirculation/VVT / Status2 monitor is Complete.
HINT:
If the monitor is Incomplete, perform the driving pattern again.
- Enter the following menus: Powertrain / Engine and ECT / Monitor / Exhaust Gas Recirculation/VVT/Details.
- Check the Details (EGR FLOW INSUFFICIENCY).
HINT:
Make sure that the value is between MIN and MAX.
- If the monitor is still Incomplete, perform the following procedure.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
- Read Pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Power train / Engine and ECT / Utility / All Readiness.
- Input the DTC: P0401.
- Check the DTC judgment result.
Techstream Display Description NORMAL - DTC judgment completed
- System normal
ABNORMAL - DTC judgment completed
- System abnormal
INCOMPLETE - DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
UNKNOWN - Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit
HINT:
- If the judgement result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the DTC judgment result is INCOMPLETE or UNKNOWN and no pending DTC is output, accelerate the vehicle again at 25 to 37 mph (40 to 60 km/h) with the shift lever in B, perform fuel cut operation for 5 seconds or more with the accelerator pedal fully released, and check the DTC judgment result.
- If the test result is INCOMPLETE or UNKNOWN and no pending DTC is output, perform a universal trip and check for permanent DTCs. Refer to DTC CHECK / CLEAR
.
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
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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.