Contrary to what I've read here it is relatively straight forward to get a smart phone OBD2 reader working with the V650. However I know the problem will be if your dongle supports KWP2000 (ISO9141). I DO NOT KNOW if premade cables will work. As an ET with 30 years of experience in finding mistakes in other peoples work (including this post - he has a connection error - DIY Code Reading / Clearing via ODB2) I decided to go back to first principles. I can't tell you where I bought my dongle - it was 12 years ago on a long dead ebay account. I know the clones are a mess but they are cheap enough to try a few?
1. The 4 pin underseat connecter has 12V, GND, K and L lines connected. You only need K and the power.
The pin outs are (looking at the connector on the bike with the key at the top from the front):
KLine GND
LLine VBAT
The connection from a OBD2 car style connector to the motorcycle connector is
4&5 -----GND----- connect to GND (BLK / YEL on the V650)
7 ----- K Line ----- connect to K Line (What is called Pink / Blue on schematic but to me is Purple / Violet)
16 ---- 12V ----- connect to VBAT (Brown / White)
If you have a OBD connector socket with a L Line available it may be worth connecting LG/BK to the L line on Pin 15 of OBD2 socket otherwise leave it unconnected.
I made up a patch cable between an unused OBD2 socket and an old 4 pin Honda plug I had from an old project.
![Image]()
Face view of OBD2 socket on the bike.
![Image]()
Working prototype. I've since tidied up the connection and permanently installed the dongle under the toolbag rubber band.
![Image]()
This is correct. This is the face view of a ODB2 socket as you would find in a wrecked car or on an unused test lead.
![Image]()
Default Torque screen. I finally have a coolant temp reading. Updates every second or so and you can set alarms.
1. The 4 pin underseat connecter has 12V, GND, K and L lines connected. You only need K and the power.
The pin outs are (looking at the connector on the bike with the key at the top from the front):
KLine GND
LLine VBAT
The connection from a OBD2 car style connector to the motorcycle connector is
4&5 -----GND----- connect to GND (BLK / YEL on the V650)
7 ----- K Line ----- connect to K Line (What is called Pink / Blue on schematic but to me is Purple / Violet)
16 ---- 12V ----- connect to VBAT (Brown / White)
If you have a OBD connector socket with a L Line available it may be worth connecting LG/BK to the L line on Pin 15 of OBD2 socket otherwise leave it unconnected.
I made up a patch cable between an unused OBD2 socket and an old 4 pin Honda plug I had from an old project.
Face view of OBD2 socket on the bike.
Working prototype. I've since tidied up the connection and permanently installed the dongle under the toolbag rubber band.
This is correct. This is the face view of a ODB2 socket as you would find in a wrecked car or on an unused test lead.
Default Torque screen. I finally have a coolant temp reading. Updates every second or so and you can set alarms.
