LEDs Meaning for rev.4.x KPro Boards

DIAG LED can be found near the USB connector.
DIAG	Meaning
Rare Flashes	ECU NOT Powered. USB Connected.
On	ECU Powered.
Data Transfer	Datalogging or Programming ECU.
Blinking Fast	RAM or MCU Fault.
Blinking Slowly	NVM or BT Fault. Boot Mode Active on Device.

LEDs Meaning for rev.2.x KPro Boards

HL1 (red) and HL2 (blue) LEDs can be found near the USB connector.
HL1	HL2	Meaning
Off	On	Normal operation when not connected to KPro Manager. Ignition ON and USB Disconnected Ignition OFF and USB Connected
Blinking Slowly	On	KPro Manager communicating with the KPro Board normally. (Dataloging or Programming not Active)
Blinking Fast	On	KPro Manager Datalogging from ECU.
On	On	KPro Manager Programming ECU.
On	Flashing	Fault with programmer board.
Off	Off	If the ignition is ON, then there is a fault with the programmer board or ECU socketing.

D1 (red) and D2 (blue) LEDs can be found near the USB connector.
D1	D2	Meaning
Off	On	Normal operation when not connected to KPro Manager. Ignition ON and USB Disconnected Ignition OFF and USB Connected
Blinking Slowly	On	KPro Manager communicating with the KPro Board normally. (Dataloging or Programming not Active)
Blinking Fast	On	KPro Manager Datalogging from ECU.
On	On	KPro Manager Programming ECU.
On	Flashing	Fault with programmer board.
Off	Off	If the ignition is ON, then there is a fault with the programmer board or ECU socketing.