Touch screen display (TSD) and diagnostic functions of the navigation system
The TSD and the navigation system module perform self-diagnosis, which allows the mechanic to troubleshoot the system. DTCs can be retrieved/diagnosed using a Land Rover approved diagnostic system.
TSD diagnostics
Built-in diagnostic functions allow you to identify errors in the operation of the TSD. The mechanic can test the system for the following items:
- Operation of hardware keys
- Touch display operation
- Video input
- Color video channels (RGB)
- Vehicle signals
- Self-diagnosis
- system configuration
- Vehicle configuration
- MOST ring operation
- After turning on the system, enter the main menu "Home".
- Press the top center of the screen for about 5 seconds and then press the navigation system hard key (Discovery - bottom left, Range Rover - top right).
- A window will be displayed "Diag PIN Entry", enter the access code 753.
- As soon as the system accepts the code, the diagnostic menu will appear on the screen.
Checking Display Hardware Keys
Testing is carried out to verify the functioning of the two hardware keys built into the TSD. If the key is working, when you press the corresponding icon on the screen, the latter will be displayed on a green background.
Touch screen test
By entering the touch screen test mode, the mechanic can test the reaction of the screen when touched. He can either check that the screen is working or recalibrate it. After pressing the key "Touch Check Switch" (Checking touch switches) the screen will be blank. When you touch the screen anywhere, the coordinates of the corresponding point are displayed. If you touch the faulty area of the screen, the coordinates will not be displayed.
Calibrating the screen will ensure that the coordinates match the touch point. To do this, click on the various "targeted" screen dots as they are shown.
Signals from vehicle systems
Function "Signals from vehicle systems" allows you to display the signals coming to the TSD from other vehicle systems. Among them:
- Battery voltage
- Lighting (on or off)
- Decreasing the brightness of instrument lighting
- Audio Output Distribution
- PCB block temperature
- speed limit (on or off)
- MOST fiber optic transceiver temperature
- Parking brake position (electric parking brake - on or off)
- Touch screen backlight PWM level
- Beep volume
- Sound tone
Checking video inputs
With this function, you can test the TSD video inputs. These include TV/DVD inputs (TV, connection with DVD player) infotainment system for rear passengers (RSE).
Checking RGB colors
This feature allows the mechanic to check the colors generated by the TSD. Six monochrome colors are displayed on the screen. Selecting any of them results in a solid fill of the screen with the selected color. Touching the TSD again returns it to color selection mode.
Self-diagnosis
The self-diagnostic function displays current TSD fault codes. In addition, the status of the ignition switch and battery voltage are displayed.
Two additional softkeys allow you to clear error codes and check the TSD.
System configuration
Information about the TSD and the navigation system module is displayed on the screen. Switching between these two components is done using the soft key in the upper left corner of the screen.
The following information is available:
- Vehicle type
- Part number
- Part Number
- Component group number
- Main processor bootloader version
- Main software version of the computer
- Version of additional computer software
- Dedicated CAN bus database version
Vehicle configuration
Selecting an option "Vehicle configuration" allows the mechanic to check which infotainment system components are installed on the vehicle. This option is located on four screens, the transition between which is carried out by the keys "Forward" And "Back".
MOST check
The MOST bus test screen displays information about the signals transmitted on this stub bus. When using any part of the audio system, a message is displayed on the screen, transmitted via the MOST bus. This allows you to identify faults associated with a given data bus.
Diagnosis of the navigation system control module
Built-in diagnostic functions allow you to identify errors in the operation of the navigation module. The mechanic can test the system for the following items:
- Information about the navigation system
- Information about system components
- Manual check
- Self-diagnosis
The built-in diagnostic system is accessed as follows:
- After turning on the system, enter the menu of the navigation system by pressing the hardware button of the navigation system.
- Agree to cancel the screen.
- Enter the main menu of the navigation system.
- Press for some time on the top center of the TSD.
- A window will be displayed "Diag PIN Entry", enter the access code 753.
- Information about the navigation system
- Manual check
- Information about system components
- Self-diagnosis
Navigation information
This menu item has three subsections:
- Vehicle signals
- GPS Information
- Reset position
Information about system components
If you select this option, the system will provide information about components and software versions.
Manual check
The menu provides the ability to perform the following tests:
- Checking the RGB Colors of the Navigation System Screen
- Checking the microphone input level
- Checking the output signals of the voice messaging system
Self-diagnosis
Self-diagnosis consists of an internal health check of the navigation system module with the display of fault codes on the TSD screen.
Inspection and verification
1. Check the validity of the customer's complaint.
2. Visually inspect for obvious electrical problems.
Electrical Factors |
3. If an obvious cause of a problem you identified or described by the customer is found, correct it before proceeding to the next steps (if possible).
4. Use an approved diagnostic system or scan tool (tester), to retrieve all DTCs before accessing the DTC Index (DTC).
Clear all DTCs after troubleshooting.
Symptom table
Symptom | Possible reason | Operation |
Loss of satellite reception | NOTE: It may take several minutes to acquire satellites after the ignition is turned on. There is a possibility that the GPS antenna may lose signal from satellites in mountainous or heavily forested areas, in built-up areas, in multi-storey car parks, tunnels, or during heavy rain/thunderstorm. Check for DTCs (DTC), indicating a malfunction of the navigation system module. | |
TSD displays high temperature message and turns off | Check FOT MOST temperature via TSD diagnostic function (signals from vehicle systems). After the temperature drops, the system will return to normal operation. If the system does not return to normal operation, check for DTCs that indicate a malfunction in the infotainment system. | |
TSD displays low temperature message and turns off | Check FOT MOST temperature via TSD diagnostic function (signals from vehicle systems). After the temperature rises, the system will return to normal operation. If the system does not return to normal operation, check for DTCs that indicate a malfunction in the infotainment system. | |
blank screen | Go to detailed check G830887p1. | |
Navigation screen blank (screen does not change) | Go to detailed check G830887p2. | |
Hardware switches not working | Go to detailed check G830887p3. | |
Radio screen not showing (Range Rover only) | Go to detailed check G830887p4. | |
The CD screen is not displayed (Range Rover only) | Go to detailed check G830887p5. | |
TV/DVD screen does not appear | Go to detailed check G830887p6. | |
The AUX screen is not displayed. (Range Rover only) | Go to detailed check G830887p7. | |
Display screen does not switch to low light mode | Go to detailed check G830887p8. | |
Noise interference on every screen and abnormal colors | Go to detailed check G830887p9. | |
Screen noise (wrong synchronization) | Go to detailed check G830887p10. | |
Abnormal screen color | Go to detailed check G830887p11. | |
Map disc won't insert/eject | Go to detailed check G830887p12. | |
Touch switches not working | Go to detailed check G830887p13. | |
Significant deviation between the displayed vehicle position and the actual position | Go to detailed check G830887p14. | |
GPS tag does not appear | Go to detailed check G830887p15. | |
No sound | Go to detailed check G830887p16. | |
No voice recognition | Go to detailed check G830887p17. | |
The mark of the current position of the car rotates around its axis | Go to detailed check G830887p18. | |
Vehicle position is not updated | Go to detailed check G830887p19. | |
Route could not be calculated | Go to detailed check G830887p20. | |
Map display is incomplete | Go to detailed check G830887p21. | |
The vehicle position mark moves in the opposite direction to the direction of travel | Go to detailed check G830887p22. | |
Cannot make or receive a call using a bluetooth phone - cannot connect to the car | Go to detailed check G830887p23. | |
A message is displayed "NAVIGATION NOT INSTALLED" (navigation system not installed) | Refer to the wiring diagrams and check the navigation module power and ground circuits and the dedicated CAN bus circuit. | |
A message is displayed "NO NAVIGATION AVAILABLE" (navigation unavailable) | Perform GVIF checks, refer to electrical diagrams and check wiring harness for short circuit, open |
DTC index
NOTE: If a control module is suspected and the vehicle continues to be covered by the manufacturer's warranty, refer to the warranty manual before installing a new module (subsection B1.2), or determine if there is any previously approved special program in operation.
NOTE: Universal Scan Tools cannot read the listed codes or can only read 5-digit codes. Match the 5 digits from the scan tool with the first 5 digits of the listed 7 digit code to identify the problem (the last 2 digits give additional information read by the diagnostic system approved by the manufacturer).
NOTE: Always use a digital multimeter when performing voltage or resistance tests (DMM) accurate to three decimal places and with a modern calibration certificate. When checking resistance, be sure to consider the resistance of the DMM wires.
NOTE: Before running diagnostic programs using pinpoint tests, check and correct basic problems.
NOTE: Inspect the electrical connectors for signs of water intrusion and their pins for damage and/or corrosion.
NOTE: If DTCs are logged and there is no problem after performing pinpoint tests, an intermittent problem may be the cause. Be sure to check for loose connections and corroded contacts.
DTC | Description | Possible reason | Action |
B100E25 | Input video signal "A" | Check TV/DVD connection (green connector). Check TV/DVD system for DTCs. | |
B101025 | Input video signal "WITH" | Make sure the camera is connected and working properly | |
B1A0049 | control module | Check the module's power and ground circuits. Refer to the electrical manual. If a module is suspected, refer to the warranty policy and procedures manual. Check and install a new front touch screen display if necessary, refer to the new module/component installation note at the top of the DTC Index. | |
B1A8911 | Satellite antenna | NOTE: 803B Navigation Diagnostics Self Test Code | Check if the GPS antenna is installed correctly. Refer to the electrical diagrams and check the GPS antenna circuit for a short to ground. Check the GPS antenna, install a new antenna if necessary. Check and install a new navigation module if necessary, refer to the new module/component installation note at the top of the DTC Index |
B1A8913 | Satellite antenna | NOTE: 80-3A Navigation System Diagnostic Self Test Code | Check if the GPS antenna is installed correctly. Refer to the electrical diagrams and check the GPS antenna circuit for an open circuit. Check the GPS antenna, install a new antenna if necessary. |
B1B0049 | Additional module "A" | NOTE: Navigation Diagnostics Self Test Code 8011, 58-02, 08-42, 08-43 Navigation module internal failure | Check the temperature regime and the correct installation of the navigation module. Install a new navigation module if necessary, refer to the new module/component installation note at the top of this DTC Index |
B1D6249 | Additional module"B" | NOTE: Navigation System Diagnostic Function Self Test Code 32-4B Vehicle Information and Communication System Module (VICS) - internal electrical fault | Check the module's power and ground circuits. Refer to the electrical manual. Check and install a new VICS module if necessary, refer to the new module/component installation note at the top of the DTC Index. If a module is suspected, refer to the warranty policy and procedures manual. |
B1D6287 | Additional module"B" | NOTE: Navigation Diagnostics Self-Test Code 3230 | Refer to the electrical circuit diagrams and check the VICS module circuits for short to ground, short to battery, or open circuit. Check and install a new VICS module if necessary, refer to the new module/component installation note at the top of the DTC Index. Set up the system configuration using an approved diagnostic system. |
U1A0087 | Medium speed CAN bus | NOTE: Self test code for navigation system diagnostics 0150, 01-51, 30-28, 30-D2 NOTE: A message is displayed "NAVIGATION NOT INSTALLED" (navigation system not installed) | Check the system connections at the display and navigation module. Refer to electrical diagrams and check dedicated CAN network for short circuit, open circuit. Perform CAN network integrity checks using the manufacturer approved diagnostic system. Refer to section "Network communication" in the workshop manual. |
U1A0131 | Communication channel | NOTE: A message is displayed "NO NAVIGATION AVAILABLE" (navigation unavailable) | Check that the GVIF circuit connectors are connected correctly. Refer to the electrical circuit diagrams and test the multimedia module GVIF circuits for short circuit to ground, short circuit to battery, or open circuit. |
U200531 | Vehicle speed | Vehicle speed signal circuit between ABS and navigation system module - short circuit, open | Check "SPD PULSE COUNT" (pulse count SPD) via the diagnostic function of the navigation system (screen of signals from vehicle systems). If the reading remains at zero, refer to the electrical manuals and check the vehicle speed signal circuit between the ABS module and the navigation system module for a short to ground, short to battery, or open circuit. |
U300068 | control module | NOTE: Navigation Diagnostics Self Test Code 3076 | An overheating message is displayed on the TSD before the infotainment system turns off. After the temperature drops, the system will return to normal operation. If the system does not return to normal operation, check for DTCs that indicate a malfunction in the infotainment system. Refer to the electrical manuals and check the power and ground circuits of the element. Check the MOST circuit. Perform a general MOST check. Refer to section "Network communication" in the workshop manual and in the approved diagnostic system. If a module is suspected, refer to the warranty policy and procedures manual. |
Comments on this article