Confirmation Driving Pattern
WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
- Stop the engine and allow it to soak.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) [A].
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Data List / Coolant Temp and Intake Air.
- Check that the value of the Data List item Coolant Temp is 56°C (133°F) or less and the value of the Data List item Intake Air Temperature is between 0 and 35°C (32 and 95°F).
- Set the heater control to MAX HOT with fresh air mode selected and turn the A/C off.
- Start the engine and drive the vehicle at 80 km/h (50 mph) or more for 20 minutes [B].WARNING:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
- After the value of the Data List item Coolant Temperature stabilizes, check that it is 75°C (167°F) or higher.
HINT:
If the value of the Data List item Coolant Temperature is less than 75°C (167°F) while driving the vehicle at 80 km/h (50 mph), inspect the cooling system and thermostat.
- Enter the following menus: Powertrain / Engine / Trouble Codes [C].
- Read the 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: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P0128.
- 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
N/A - Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result is NORMAL, the system is normal.
- If the judgment result is ABNORMAL, the system has a malfunction.
- If the judgment result is INCOMPLETE or N/A, If the judgment result is INCOMPLETE, perform steps [D] through [G].
- With the engine stopped, leave the vehicle outside overnight [D].
- Turn the engine switch on (IG) [E].
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.
- Check that the value of the Data List item Coolant Temp is 25°C (77°F) or less.
- Start the engine and drive the vehicle at 90 km/h (56 mph) or more for 20 minutes [F].WARNING:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
- Enter the following menus: Powertrain / Engine / Trouble Codes [G].
- Read the 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: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P0128.
- Check the DTC judgment result again.
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
N/A - Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result is NORMAL, the system is normal.
- If the judgment result is ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the following procedure.
- Perform a universal trip and check for permanent DTCs.
Refer to DTC CHECK / CLEAR [11/2021 - ]
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.