1. Configuring connection to interface - AlfaOBD（1。）.pdf

1. Configuring connection to interface Currently there are three types of interfaces supported: 1. OBDKey Bluetooth/USB/ WLAN /vehiclediagnostics.asp. This interface is a universal one supporting all listed ECUs, both K-Line and CAN-based. An additional advantage of the interface is that a firmware upgrade can be provided by the producer if necessary. 2. ELM327-based Bluetooth/USB/ WLAN interface. There are many suppliers of such interfaces, make sure the version is 1.3 and above. The interface supports all CAN and most of the K-Line units. A rule of thumb is that the K-Line units with connection baud rate less than 10400 bps is not supported. Because the quality of ELM327 clones is not stable, it is recommended to use tested interfaces (see for details). 3. OBDLink SX/MX Bluetooth/USB . The same limitations as the ones of ELM327 interface apply. The advantage of OBDLink is high communication rate of 115200 bps with the Android device. Note: The interfaces have only pin 7 of the OBD plug internally connected to K-line converter. Fiat uses pin 7 for connections to engine and automatic gearbox controls only. The K lines from other units are connected to other pins of the car OBD plug. To be able to diagnose those units you need to modify your interface. A simple solution is to weld all the K line pins inside the interface together to pin 7. DO NOT CONNECT AN INTERFACE MODIFIED THIS WAY to Alfa Mito/ Giulietta, Fiat 500/500L/ Grande Punto/Punto Evo/Ducato 250 (see an explanation below) ! Alternatively, you can purchase Airbag, ABS, P/S CAN adaptor cables at http://electronic- fuchs.de/shop/category_12/Adapter.html?shop_param=cid%3D%26 or http://www.gendan.co.uk/product_FESCBL.html , the kit is fully compatible with AlfaOBD. The OBD plug as you see it in the car (usually to the left of the driving wheel under the cover) looks like: Fiat typical pin out. The K-line pins are marked red: Connection