This only applies to recent models. It does not apply to old USB vehicle interfaces labelled "CAN & Dual K-Line USB Vehicle Interface".
The status LED will indicate the Vehicle Interface status in different operating conditions. Here's a summary of the possible colours.
* LED and Bluetooth (in Bluetooth models) are disabled in deep sleep to meet USB standard power requirements.
EcuTek Technical Support
(+44) 1895 811200
When dialing from within the UK, the country code is not required so dial 01895 811200
Monday to Friday 9:00am - 5:00pm BST (UK Time)
(4am-1230pm Eastern Standard TIme US)
Visitors by appointment only
EcuTek Tehnologies Ltd.8 Union BuildingsWallingford RoadUxbridge, UB8 2FREnglandVAT No: GB 235 2616 23