System Malfunction Message is Displayed on the Multi-information Display [03/2023 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR DTC
- Check for DTCs.
Body Electrical > Smart Access > Trouble Codes
Body Electrical > Power Source Control > Trouble Codes
Result
Result Proceed to DTCs are not output A DTC is output. B
Result:
B
GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) (DIAGNOSTIC TROUBLE CODE CHART). Refer to DIAGNOSTIC TROUBLE CODE CHART [03/2023 - ]
Result:
A
See step 2
- Check for DTCs.
- READ VALUE USING GTS (VEHICLE RUNNING CONDITION (LINE))
- Read the Data List according to the display on the GTS.
Body Electrical > Power Source Control > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note Vehicle Running Condition (Line) Vehicle being driven or stopped Stop or Running Stop: Vehicle stopped
Running: Vehicle being driven at 5 km/h (3 mph) or more- Body Electrical > Power Source Control > Data List
Tester Display Vehicle Running Condition (Line) OK
The GTS display changes correctly in response to the vehicle condition.
Result
Proceed to OK NG
Result:
OK
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to REMOVAL [11/2021 - ]
Result:
NG
GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]
- Read the Data List according to the display on the GTS.