OBD no signal

jantt · Post by **jantt** » 12 Jan 2019, 22:55

Hi

Have a C70 2000

When I put my scanner in the OBD then the power light is on, but not the other two lamps.
They come on as I connect it, but goes out again.
Same with the Volvo Vida. No connection.
Has worked before.
Tried to change the wire in the tunnelbox. Did not help.
Could it be a groundcable ?

Post by **wizechatmgr** » 13 Jan 2019, 00:10

Would suggest checking the 12V+ and grounds that go to the OBDII connector. It is also possible one or more terminals within the connector have some corrosion built up.

jantt · Post by **jantt** » 13 Jan 2019, 00:36

+ is allright since power light is on and + goes together with cigarligther and it works.
Has as I wrote changed wire and t is not the OBD connector socket

has enclosed picture of wiring

Post by **wizechatmgr** » 13 Jan 2019, 01:21

Next idea I would have would be to unhook the battery and reseat the ECU.

jantt · Post by **jantt** » 13 Jan 2019, 01:24

ok thanks. Will try that

jantt · Post by **jantt** » 13 Jan 2019, 20:33

Didn`t help to unhook battery

jantt · Post by **jantt** » 13 Jan 2019, 21:48

Sometimes my abs + stc lampes goes on.
Think I have read that faul on abs unit can have somrthing to do with obd. Is that right ?

Post by **wizechatmgr** » 13 Jan 2019, 22:00

jantt wrote: ↑13 Jan 2019, 21:48 Sometimes my abs + stc lampes goes on.
Think I have read that faul on abs unit can have somrthing to do with obd. Is that right ?

Yes, but I'm not sure most scanners other than VIDA will be able to see it. Ignition switch is in position II when you're attempting to communicate with the vehicle, correct?

jantt · Post by **jantt** » 13 Jan 2019, 22:31

yes it is in II. Put the scanner in and all 3 lamps light up and 2 goes out. Turn to II and notthing happens. Then I touch the scanner and the 2 lamps comes on, but goes out again

Post by **wizechatmgr** » 13 Jan 2019, 22:52

Any chance you can take pictures of these? I appear to be daft tonight =)