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-   C30 / S40 & V50 '04-'12 / C70 '06-'13 General (https://www.volvoforums.org.uk/forumdisplay.php?f=58)
-   -   Lots of error codes. Need help diagnosing root cause. (https://www.volvoforums.org.uk/showthread.php?t=286637)

tcpaulh Sep 22nd, 2018 15:32
I disconnected the battery then gently cleaned the CEM pins with a very small nylon brush after spraying with contact cleaner, left overnight to dry then reconnected everything.

The terminal pins and sockets looked spotless before I did this with no sign of corrosive product but cleaned anyway.

Car starts OK. Idles briefly at 2000rpm then drops to usual 1000ish

Check engine light is on while engine running. Will it generally do that for a while after cem has been disconnected until it recalibrates?

Clan Sep 22nd, 2018 15:42
Quote:
Originally Posted by tcpaulh (Post 2450140)
I disconnected the battery then gently cleaned the CEM pins with a very small nylon brush after spraying with contact cleaner, left overnight to dry then reconnected everything.

The terminal pins and sockets looked spotless before I did this with no sign of corrosive product but cleaned anyway.

Car starts OK. Idles briefly at 2000rpm then drops to usual 1000ish

Check engine light is on while engine running. Will it generally do that for a while after cem has been disconnected until it recalibrates?
I hope you disconnected the battery before doing your checks , otherwise there will be a lot of codes which will need clearing .
At least you know there is no corrosion , it is likely the network female terminals are a slack fit on the CEM pins ..

tcpaulh Sep 22nd, 2018 15:56
Quote:
Originally Posted by Clan (Post 2450142)
I hope you disconnected the battery before doing your checks , otherwise there will be a lot of codes which will need clearing .
At least you know there is no corrosion , it is likely the network female terminals are a slack fit on the CEM pins ..
I did :-)

Check engine light is on while engine running. Will it generally do that for a while after cem has been disconnected until it recalibrates?

Clan Sep 22nd, 2018 16:04
Quote:
Originally Posted by tcpaulh (Post 2450145)
I did :-)

Check engine light is on while engine running. Will it generally do that for a while after cem has been disconnected until it recalibrates?
no , if the battery was disconnected before and reconnected after the CEM was dealt with it will be in the same state as before , The light fault code needs investigating ..

tcpaulh Sep 22nd, 2018 16:15
Quote:
Originally Posted by Clan (Post 2450150)
no , if the battery was disconnected before and reconnected after the CEM was dealt with it will be in the same state as before , The light fault code needs investigating ..
Sorry for all the questions. I had one of those cheap Bluetooth OBDII code (elm327) readers which wouldn't show a thin in torque pro. Is there a budget reader that is known to work for basic code reading? Or laptop software?

Clan Sep 22nd, 2018 16:19
Quote:
Originally Posted by tcpaulh (Post 2450158)
Sorry for all the questions. I had one of those cheap Bluetooth OBDII code (elm327) readers which wouldn't show a thin in torque pro. Is there a budget reader that is known to work for basic code reading? Or laptop software?
There is a counterfeited version of Volvo's VIDA and the Dice interface around on e-bay , search for it or ask about it on here ..

tcpaulh Sep 22nd, 2018 18:50
ODB2 to USB cables on eBay all seem to be geared towards different makes/models.

Am I right to assume its a generic standard for the leads and any USB<>OBD2 lead should be OK

Don't tell me different leads have different pin connections lol

Ghost83 Sep 22nd, 2018 19:26
I am interested in this as well.
I bought one of those ELM327 WiFi scanner, but made hell of a lot mess in the car. It lit up like a Xmas tree, with lots of DTCs.
The car did not even turned after plugging that thing in.


Once I removed it started after a minute elapsed.

Greg

tcpaulh Sep 23rd, 2018 13:54
YouTube videos I've looked at all have the OBD to USB lead with the in-line black box.

Haven't seen any with a straight odb to USB cable without the box of tricks in between.

Hmm, which cable do I buy?

https://rover.ebay.com/rover/0/0/0?m...2F322997229051

Maybe?

Clan Sep 23rd, 2018 15:36
Quote:
Originally Posted by tcpaulh (Post 2450410)
YouTube videos I've looked at all have the OBD to USB lead with the in-line black box.

Haven't seen any with a straight odb to USB cable without the box of tricks in between.

Hmm, which cable do I buy?

https://rover.ebay.com/rover/0/0/0?m...2F322997229051

Maybe?

That is what Dice is , you need it with VIDA .. It should come together


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