Lexus NX: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
- If no problem symptoms are found when a DTC is output in the DTC check on the lane tracing assist, check each symptom by checking the suspected areas in the order they are listed.
- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
HINT:
Before performing failure diagnosis according to the following inspection points, check the forward recognition camera system power source circuit fuses and relays.
LANE CONTROL SYSTEM| Symptom | Suspected Area | Link |
|---|---|---|
| Lane tracing assist system does not operate at all | Steering pad switch circuit | |
| Forward recognition camera adjustment HINT: Perform forward recognition camera axis alignment with either "One time recognition" or "Sequential recognition". |
| |
| The LTA/LDA indicator light does not turn on even by operating the LTA/LDA main switch (steering pad switch assembly) | Indicator circuit | |
| Steering pad switch circuit | | |
| Combination meter assembly | | |
| The LTA/LDA indicator light does not turn off even by operating the LTA/LDA main switch (steering pad switch assembly) | Indicator circuit | |
| Steering pad switch circuit | | |
| Combination meter assembly | | |
| The lane tracing assist is not canceled even by operating the turn signals | Data list / Active test (Check the item "Turn Switch (Right)", "Turn Switch (Left)") | |
| Turn signal switch circuit | | |
| The lane tracing assist does not operate many times even when the white lines are visible | Check conditions for operating/not operating | |
| Forward recognition camera adjustment HINT: Perform forward recognition camera axis alignment with either "One time recognition" or "Sequential recognition". |
| |
| The lane tracing assist is operating but the system control status is not displayed on the multi-information display | Data list / Active test (Check the item "LDA Control") | |
| Combination meter assembly | | |
| Lane departure warning function is on but the buzzer does not sound even when straying from white line | Combination meter assembly | |
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Terminals Of Ecu
TERMINALS OF ECU CHECK FORWARD RECOGNITION CAMERA NOTICE: DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the insp
Diagnosis System
DIAGNOSIS SYSTEM DIAGNOSIS MODE FUNCTION (a) w/ Lane Centering Function: When a malfunction occurs in the lane tracing assist system system, the LTA indicator light illuminates yellow and a message is
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Chassis / Lane Control / Trouble Codes
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Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The following procedure is for the LH side.
NOTICE:
Since the RH side flexible hose and LH side flexible hose are not interchangeable, verify the part numbers when installing the front flexible hose
VSC OFF Switch Circuit
DESCRIPTION The skid control ECU assembly is connected to the combination meter assembly via CAN communication. Pressing the VSC OFF switch turns off TRAC operation, and pressing and holding this switch turns off TRAC and VSC operation. If TRAC and VSC operations are turned off, the TRAC OFF message
