Lexus NX: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
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The following inspection procedures for the parking assist monitor system are based on the assumption that the navigation system is normal. If the navigation system has any malfunctions, first proceed with troubleshooting the navigation system.
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Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the parking assist monitor system may be needed.
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HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| When the shift lever is in R, the parking assist monitor image is not displayed (screen is not black). | Proceed to "Reverse Signal Circuit" | |
| Multi-display assembly | | |
| When the shift lever is in R, the parking assist monitor image is not displayed (screen is black). | Proceed to "Image from Camera for Parking Assist Monitor is Abnormal" | |
| Multi-display assembly | | |
| When the shift lever is not in R, an image of the area behind the vehicle is displayed | Proceed to "Reverse Signal Circuit" | |
| Multi-display assembly | | |
| When the shift position is in R, an image of the area behind the vehicle is displayed and then switches to another image | Proceed to "Reverse Signal Circuit" | |
| Multi-display assembly | |
| Symptom | Suspected Area | Link |
|---|---|---|
| Parking assist monitor display malfunction (distortion of the color/screen) occurs continuously | Proceed to "Image from Camera for Parking Assist Monitor is Abnormal" | |
| Parking assist monitor display malfunction (distortion of the color/screen) occurs temporarily | Check the usage conditions (explain to the customer that the display may be temporarily distorted when the vehicle is close to an object that transmits radio waves, such as a telecommunication tower, an airport or a truck equipped with a transceiver) | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Estimated course lines are not displayed | Parking assist monitor screen display mode settings (check that estimated course line display mode is selected) | |
| Correct the steering angle neutral point (initialization) | | |
| Steering angle setting (calibration) | | |
| Rear television camera assembly | | |
| Steering sensor | | |
| The estimated course lines stop moving before the steering wheel is fully turned to the right or left | Steering angle setting (calibration) | |
| The vehicle width guide lines and estimated course lines do not match when the steering wheel is turned to the center position | Check the installation of steering wheel | |
| Correct the steering angle neutral point (initialization) | | |
| Steering angle setting (calibration) | | |
| Check that the television camera assembly is correctly installed | | |
| Back camera position setting (calibration) | | |
| Rear television camera assembly | | |
| Steering sensor | | |
| The guide lines are not displayed even though the back door is closed | Check that the No. 1 luggage compartment light assembly illuminates normally (if not, refer to Lighting System (INT) - Problem Symptoms Table) | |
| Rear television camera assembly | | |
| The guide lines remain displayed even though the luggage compartment door is open | Check that the No. 1 luggage compartment light assembly illuminates normally (if not, refer to Lighting System (INT) - Problem Symptoms Table) | |
| Rear television camera assembly | | |
| The "!" is displayed. | Correct the steering angle neutral point (Initialization) | |
| The "!" mark remains displayed after the steering neutral point is corrected. | Steering angle setting (Calibration) | |
| Steering sensor | | |
| Rear television camera assembly | | |
| Guide lines and buttons are not displayed for all parking assist monitor screen display modes. | CAN communication system | |
| Proceed to "Back Door Courtesy Light Switch Circuit" in Lighting System (INT) | | |
| Rear television camera assembly | | |
| The guide lines and buttons remain displayed even though the back door is open. | CAN communication system | |
| Proceed to "Back Door Courtesy Light Switch Circuit" in Lighting System (INT) | | |
| Rear television camera assembly | | |
| When adjusting the camera optical axis, "You can not calibrate the camera when the door is open. Please close the door." is displayed even after the back door has been closed | Check that the No. 1 luggage compartment light assembly illuminates normally (if not, refer to Lighting System (INT) - Problem Symptoms Table) | |
| Rear television camera assembly | | |
| "CHK" message(s) are displayed on the Car Signal Check screen. | Car signal check (Diagnosis) | |
| When the parking assist monitor screen is displayed, the lines are misaligned. (The image from the camera is tilted.) | Back camera position setting (Calibration) | |
| Symptom | Suspected Area | Link |
|---|---|---|
| A switch displayed on the parking assist monitor screen does not respond when pushed, or a switch other than the pushed switch responds. | Proceed to "Remote Touch Function" in Navigation System*1 | |
| Proceed to "Remote Touch Function" in Audio and Visual System*2 | | |
| Rear television camera assembly | | |
| Multi-display assembly | | |
| A beep sound is not emitted when a switch displayed on the parking assist monitor screen is pushed. | Check the setting on the audio screen (General setting) | - |
| Proceed to "Remote Touch Function" in Navigation System*1 | | |
| Proceed to "Remote Touch Function" in Audio and Visual System*2 | | |
| Rear television camera assembly | | |
| Multi-display assembly | | |
| The language of the messages displayed on the parking assist monitor screen cannot be changed. | Check the setting on the audio screen (General setting) | - |
| Rear television camera assembly | | |
| Multi-display assembly | | |
| The switches displayed on the parking assist monitor screen are grayed out. | Rear television camera assembly | |
| Multi-display assembly | | |
| The color of the switches displayed on the parking assist monitor screen are abnormal, or the switches are not dimmed when the headlights are turned on. | Check the setting on the audio screen (Screen adjustment) | - |
| Proceed to "Remote Touch Function" in Navigation System*1 | | |
| Proceed to "Remote Touch Function" in Audio and Visual System*2 | | |
| Rear television camera assembly | | |
| Multi-display assembly | |
- *1: w/ Navigation System
- *2: w/ Audio and Visual System
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TERMINALS OF ECU REAR TELEVISION CAMERA ASSEMBLY (a) Disconnect the Y25 rear television camera assembly connector. (b) Measure the voltage on the wire harness side connector according to the value(s)
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DIAGNOSIS SYSTEM PARKING ASSIST MONITOR DIAGNOSIS SYSTEM (a) For parking assist monitor system diagnosis, signals received by the radio receiver assembly can be checked and the parking assist monitor
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 / Parking Assist Camera / Trou
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12-volt battery
Location
The 12-volt battery is located in the left-hand
side of luggage compartment.
■Before recharging
When recharging, the 12-volt battery produces
hydrogen gas which is flammable
and explosive. Therefore, observe the following
precautions before recharging:
If recharging with the
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