Troubleshooting

Symptoms

• “YOU ARE >50KM FROM START LINE” message displayed.

Possible Causes

• Incorrect start/finish line selected.
• Incorrect track selected.
• Previously stored start/split data still active.

Resolution

1. Confirm the correct track is selected.
   (MENU → Select Track)
2. Reset the start/finish lines and gates.
   (MENU → Lap Timing Menu → Clear Start & Splits → OK)
3. Reconfigure the required track or start/finish line if necessary.

Symptoms

• Unable to load or save a reference lap.
• Warning message displayed during transfer.

Possible Causes

• LapTimer is detecting vehicle movement during the selected operation.

Resolution

• Stop the vehicle completely before attempting to load or save a reference lap.

Symptoms

• Reference lap fails to load.
• “FAILED TO LOAD” message displayed.

Possible Causes

• Reference lap file missing from SD card.
• Incorrect filename used.

Resolution

• Confirm the reference lap file is present on the SD card.
• Ensure the filename is LAP.REF.

Symptoms

• Unable to set:
  • Start/finish line
  • Split point
  • Finish point

Possible Causes

• Vehicle speed below required threshold

Resolution

• Ensure the vehicle is moving above 10 km/h before attempting to set gates/splits.

Symptoms

• No track layouts displayed
• “No tracks available” message shown

Possible Causes

• No supported track layouts available nearby
• Custom start/finish lines currently active

Resolution

1. Reset the Start/Finish lines and gates.
   (MENU → Lap Timing Menu → Clear Start & Splits → OK)
2. Recheck available track layouts
   (MENU → Select Track)

Symptoms

• Predictive Lap Timing does not update.
• Lap time remains fixed on screen.

Possible Causes

• Split time display period set incorrectly.
• Lap timing data requires resetting.

Resolution

1. Confirm that the split time display period is set to 5 seconds.
   (MENU → Lap Timing Menu → Split Time Display Period)
2. If the issue continues, reset the lap timing data.
   (MENU → Lap Timing Menu → Reset Lap Timing Data → OK)

Symptoms

• VBOX LapTimer freezes after power-up.
• Freeze occurs when GPS antenna is connected.

Possible Causes

• GPS data requires re-initialisation.

Resolution

Perform a GPS Coldstart

1. Power the unit without the GPS antenna connected.
2. Coldstart the unit.
   (MENU → GNSS Menu → Coldstart → OK)
3. Quickly reconnect the GPS antenna.

After Successful Coldstart

• Ensure the antenna has a clear view of the sky.
• Leave the unit powered for approximately 15 minutes.

Symptoms

• Communication error displayed.
• VBOX Sim connection fails.

Possible Causes

• VBOX Sim not running.
• Incorrect COM port selected.
• COM port connection not established.

Resolution

1. Ensure VBOX Sim is running in the background.
2. Confirm the correct COM port is selected.
3. Click Open to establish communication.

Symptoms

• Incorrect and large distance to start line is displayed.

Possible Causes

• The start line detection process is not yet complete.

Resolution

• Complete 2–3 laps to allow VBOX Sim to auto-detect the start line.

Symptoms

• VBOX LapTimer is not detected by VBOX Sim.
• No communication established.

Possible Causes

• Incorrect COM port selected.
• FTDI drivers not installed correctly.
• USB serial adapter not initialised properly.

Resolution

1. Confirm the correct COM port is selected.
2. Restart the PC after connecting the serial-to-USB adapter.
3. Confirm FTDI drivers are installed correctly.

Symptoms

• Predictive lap timing remains fixed on screen.
• Predictive values display incorrect numbers, for example -99.
• Lap time updates normally, but predictive timing does not.

Possible Causes

• Corrupted reference lap data.
• GPS position spikes during reference lap recording.

GPS spikes can occur when the vehicle is:

• Parked inside or near garages.
• Close to pit buildings or large metal structures.

Reflected satellite signals can create large position errors which corrupt the reference lap.

Resolution

Reset Lap Timing Data

1. Open the predictive timing screen.
2. Press and hold the centre square button for more than 4 seconds.
3. Wait for the confirmation message: "LAP DATA RESET".

This removes the corrupted reference lap.

Record a New Reference Lap

• Drive a complete lap to create a new reference lap.

Predictive lap timing should now operate normally.

Prevention

To reduce the risk of corrupted reference laps:

• Avoid recording reference laps near garages or large buildings.
• Ensure the vehicle has a clear view of the sky where possible.