Reading the Power LED
Every state below is shown as a steady light, so the color alone tells you what's going on.
| LED | Meaning | What to do |
|---|---|---|
| Off | No power to the ECU | Check fuses, the engine control relay and the ignition switch feed |
| Red | System error | Reconnect with the software and check for faults. Contact us if it persists |
| White | Running normally | Nothing, all good |
| Green | Running normally on v3 firmware | Use NSP software to connect |
| Blue | Boot mode or firmware update underway | Leave it alone until it finishes |
The two colors that catch people out
Green is healthy, but it tells you the ECU is on v3 firmware and expects NSP. If your laptop won't talk to a green-lit ECU, check that you're opening NSP rather than older software.
Blue means the ECU is in boot mode or mid-update. Don't switch off the ignition or unplug the laptop while it's blue. Interrupting a firmware update is one of the few ways to leave an ECU needing recovery.
The ECU's other indicator is covered in our Status LED guide, and first-time setup is in initial ECU setup.
