Caution / Notice / Hint
WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
Refer to VEHICLE CONTROL HISTORY [09/2023 - ]
(Select Powertrain in Health Check and then check the time stamp data.)
- If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
Refer to VEHICLE CONTROL HISTORY [09/2023 - ]
HINT:
- If the customer reports a knocking sound or drivability problems, check the "Consecutive Prevention Cylinder #1 History 1 to Consecutive Prevention Cylinder #4 History 4" items in the Data List.
- Explain to the customer that this is normal control to prevent pre-ignition (protect the engine) if the (distance traveled recorded in the appropriate Data List subtracted from the distance traveled in the "Distance for Control" item in the Data List) matches the (distance traveled indicated by the customer subtracted from the current distance traveled).