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:
- The GTS only:
By using the Control the VVT-iE Opening Angle Bank 1 Active Test, it can be determined if the VVT-iE system is malfunctioning.
- Remove the EFI NO. 1 fuse from the No. 1 engine room relay block and No. 1 junction block assembly and wait for at least 60 seconds.
HINT:
Clear the DTC without using the GTS.
- Reinstall the EFI NO. 1 fuse.
- Put the engine in Inspection Mode (Maintenance Mode).
- Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
- Enter the following menus: Powertrain / Engine / Active Test / Control the VVT-iE Opening Angle Bank 1 / Data List / Intake VVT Change Angle Bank 1 and Intake VVT Target Angle Bank 1.
- Read the Data List while performing the Active Test with the engine idling.OK:
Active Test Movement Order Difference between "Intake VVT Change Angle Bank 1" and "Intake VVT Target Angle Bank 1" 0 deg → 10 deg → 20 deg → 40 deg → 0 deg → 10 deg → END Within 4 DegFR
- Remove the EFI NO. 1 fuse from the No. 1 engine room relay block and No. 1 junction block assembly and wait for at least 60 seconds.