Troubleshooting
The display stays dark
- Check it over USB. Connect it to the settings page. The display turns on while connected. If it does, power and the screen are fine, and the problem is what turns it on (step 3).
- Power: 12 V on pin 5 and ground on pin 1 (pinout), and the fuse.
- Ignition source:
- CAN signal needs the Resolve Controller on the same CAN bus and switched on (ignition on, or charging), or, if you changed the Ignition signal, that signal at 1. Its card on the settings page shows the live value. Check the CAN wiring below, and the CAN bitrate.
- Ignition wire needs 12 V on pin 7 with the ignition on.
Error card
The same checks apply to the badge the other modes show near the bottom of the screen (No Data, CAN error, bus off; Screens).
| Message | Check |
|---|---|
| No Data: ID 0x… | The part that sends that message has power and its CAN wires reach the display's bus; and that the dash's CAN signals are the ones your car sends (Dash CAN signals). Set a signal your car doesn't have to Not used |
| No Data for every ID | The CAN bitrate (500 kbit/s for the Resolve Controller), CAN H and CAN L (pins 6 and 2) the right way round, and the bus terminated at both ends (Wiring) |
| Low 12V | The 12 V battery's charge, and the display's 12 V and ground wires |
| Error code 2xx | The Resolve Controller reports a fault. Look up the code in the Owner's Manual: 201–207 the battery (LeafSpy shows its fault in detail), 210–217 the same with an isolation fault: have the high-voltage system checked. With another controller, turn Resolve Controller errors off |
No CAN data
Every CAN value is missing (the CAN signal cards on the settings page show no live value). The settings page shows the display's own view of the bus under General → CAN:
| CAN status | What to do |
|---|---|
| OK, … messages/s at 500 kbit/s | The bus works. If one value is still missing, check its CAN signal (CAN signals) |
| No messages | The bus is silent: the car (or the Resolve Controller) is off, or the display's CAN wires don't reach the bus |
| Errors on the bus, … messages/s | Messages arrive, but with errors: check the wiring (a twisted pair, CAN H and CAN L not swapped, good contacts) and that the bus is terminated at both ends |
| Errors, no valid messages | Nothing can be read: almost always the CAN bitrate is wrong (General → CAN bitrate: 500 kbit/s for the Resolve Controller and a Nissan Leaf), or CAN H and CAN L are swapped. With the wrong speed the display also disturbs the bus briefly each time it starts or wakes, so set it right before driving |
| Bus off | See CAN error, bus off |
The display reads classic CAN only, not CAN FD messages.
CAN error, bus off
The screen shows CAN error, bus off (the error card on the dashes, a badge in the other modes, Screens), or the settings page shows CAN: Bus off.
After too many CAN errors the display left the bus, so it cannot disturb the car's other modules, and it stays off until it restarts. It doesn't try again by itself.
- Find the cause: the CAN bitrate, the CAN wiring and termination (No CAN data).
- Restart the display: Restart display on the settings page, or switch its 12 V off and on (fuse or connector).
- If it goes bus off again, please tell us, with General → Restarts and the CAN status from the settings page.
Wrong or missing values
| Problem | Fix |
|---|---|
| Power graph shows regen above zero | Flip the sign of the Current (or Power) signal's Multiplier: 1 becomes −1, −1 becomes 1 (CAN signals) |
| Power graph stays empty | Open the power graph's CAN signals on the settings page. The live value on each card shows whether the display receives it |
| G-force meter not at zero when standing still | Level now (Bars (g-force)) |
| Temperature in the wrong unit | Pick Motor temperature (°F) (or °C) for the gauge and write the unit yourself (Left gauge and bottom arc) |
| A dash shows -- or leaves a value out | Its CAN signal is Not used, or nothing has arrived from it yet: check the signal's live value on the settings page (Dash CAN signals) |
The settings page does not connect
- Use desktop Chrome or Edge.
- Try another USB-C cable: many only charge.
- Close other tabs with the settings page, and other programs that use serial ports.
- Unplug the display and plug it in again.
- Still nothing: install the firmware from the firmware page.
Unexpected restarts
General → Restarts counts restarts the display did not expect. A power drop usually means a loose 12 V or ground wire. For anything else, please contact us with what the line says. Clear resets it.