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 no problem is found by this diagnostic troubleshooting procedure, check for problems by referring to the appropriate engine mechanical service information.
- The engine speed can be checked by using the GTS. To perform the check, follow the procedures below:
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
- Put the engine in Inspection Mode (for measuring Exhaust Gas).
- Start the engine.
- The engine speed may be indicated as zero despite the engine running normally. This is caused by a lack of NE signals from the crankshaft position sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the crankshaft position sensor output voltage is insufficient.