Caution / Notice / Hint
WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. 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 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.
for THS-HEV Model: Refer to VEHICLE CONTROL HISTORY (RoB) [10/2022 - 10/2024] , or refer to VEHICLE CONTROL HISTORY (RoB) [10/2024 - ]
for PHEV Model: Refer to VEHICLE CONTROL HISTORY (RoB) [08/2023 - ]
(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, 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.
for THS-HEV Model: Refer to VEHICLE CONTROL HISTORY (RoB) [10/2022 - 10/2024] , or refer to VEHICLE CONTROL HISTORY (RoB) [10/2024 - ]
for PHEV Model: Refer to VEHICLE CONTROL HISTORY (RoB) [08/2023 - ]
HINT:
As the frequency signal (WPI) is 4 Hz when the engine water pump assembly is stopped to enable the ECM to detect an open or short in the signal line, the engine water pump assembly speed will be displayed as approximately 160 rpm even when the pump is stopped.