Status LED

Elite Series Firmware Help › Elite Pro Plug-in ECUs › Ford Falcon I6 Barra - Installation GuideUpdated Sep 2026

The status LED on a Haltech Elite is a quick health check you can read without a laptop. Here is what each color and flash pattern means, and what we do next.

Reading the status LED

Alongside the power LED, the Elite has a status LED that reports what the ECU is doing. It uses color and flash pattern to tell you whether things are normal, busy or faulty.

LEDPatternMeaningWhat we do
OffSteadyEither the ECU has no power, or everything is working normallyCheck the power LED to tell the two apart
RedSteadyA system error, or a firmware update is underwayIf you're updating firmware, leave it alone until it finishes. If not, connect with ESP and check for errors
OrangeSlow flashA map upgrade is in progressWait. Don't disconnect power or USB
YellowSteadyHardware errorStop and contact us before driving

Tips

Note that "off" is the normal state. People often assume a dark status LED means a dead ECU, but a healthy, running Elite shows nothing here. Always read it together with the power LED.

Red and orange during an update are expected. What matters is never cutting power while either is showing. Keep the laptop plugged in and the car on a stable supply. If the LED stays red after an update has clearly finished, or you see yellow at any time, get in touch and we'll help work out what's wrong. If you're just starting out, see initial ECU setup.