Fault codes resolved?

[Ade2015]

Hi all. Do you think this is now resolved?
The misses and kids got stuck last night and had to be recovered.
Messages shown were; 'Anti-skid service required' and 'Transmission service required' on the display.
I've checked DTCs with VIDA and initially found:
1) BCM-0101 Comms problems with ECM
2) ECM-23E0 Injector cyl 5 - signal missing
3) ECM-3553 Misfire cyl 5 - emission agitation
4) ECM-5720 Comms, Transmission Control Module (TCM) - faulty signal
5) TCM-0A31 Control module comms signal missing from Engine Control Module (ECM)
Having erased the codes a couple of times, the ones that have regularly come back are; 1), 2), 5)
I've ignored the other two codes and concentrated on 2), assuming that the other ones are related to this initial fault. Have checked injector resistance, wiring resistance between injector 5 and ECM and all seems to be ok. Was expecting to find a broken wire, but nothing obvious!
So, I've used some contact cleaner on the connections and put it back together this evening. Been for a 25 min drive at various speeds and no codes back as yet.
Does anyone believe that spraying the contacts could have resolved this?! Just seems a bit too easy a solution (and not expensive enough!). Are there any other likely causes to check out?
We've got a 2 hour long trip planned tomorrow, so I guess that should test it out pretty well.....

[cheshired5]

Originally Posted by Ade2015

HiDoes anyone believe that spraying the contacts could have resolved this?!

In short, no but time will tell.
You can only worry about or fix codes if they are there so given that they're not there, don't worry until they are.

[Ade2015]

No such luck today! Same codes re-appeared a couple of times, but took the laptop with me and cleared them. Think I have now traced it to a dodgy connector on the loom that connects to cylinder 5 injector. It seems to make a poor connection when the connector has heated up as I can make the car run poorly (or better) by moving the wires into the plug. A bit of tape to hold the wire in a good position seemed to prevent the codes re-appearing temporarily to get us home today!
I've had the loom plug apart this afternoon and tried to get my local Volvo dealer to identify the part required, without much luck - he's ordered something but isn't certain what, and it will be a couple of days!

After a bit more searching on here it looks like Clan has previously quoted the terminal repair part I need as being 30765319

http://www.volvoforums.org.uk/showthread.php?t=200148

They look like Bosch BDK terminals P/N 1928498055, so I might also try a local Bosch service centre tomorrow and see if I can get them any quicker/cheaper

Fingers crossed that it's still a relatively simple fix!

[Fraze026]

Did changing the plug on Cylinder 5 work? did you resolve this as I am having the exact same issue, identical fault codes....

[SwissXC90]

Poor injector connections are relatively common and will cause such problems as you experience.

With time, the temperature and vibration of the connectors on the engine will cause the contact pressure on the pins to weaken

You can clean the contacts with contact cleaner - make sure you do the connector and the injectors pins, and connect and disconnect the connector when the pins are wet with cleaner to ensure the cleaner wipes over all the mating surfaces.

You can try and make the pin contacts tighter - this is very tricky, as you do not want to deform the pins. To do this you need to remove pin from the connector, then bend the pin a bit to apply a bit more contact pressure, and reinsert into the housing. Tricky if you are not familiar with the process.

However the only long term reliable solution is to replace the pins in the connector with new pins.
Volvo sell pins crimped to a length of wire to solve exactly this problem. You remove the old pin, fit the new pin, and make a wire join.

[Fraze026]

Thanks a lot Swiss, I must admit it I was a bit thrown by the car throwing EVERYTHING into limp mode! Ill get on it, wasn't aware it was common on these cars

[SwissXC90]

Originally Posted by Fraze026

...wasn't aware it was common on these cars

There are multiple posts on this forum of people with injector connection issues

I also have these issues, but only on one injector, and extremely rarely (one error every 3 months or so), and for me it never causes any issues apart from logging the error.

[Ade2015]

Sorry for slow response on this - don't check as often as I used to!
I used the Volvo terminal repair kit in the end and soldered it in to replace the connectors to injector 5. Since then have had absolutely no issues, so happy to say it resolved the issue for me.
I left a little additional length on the loom after the repair as it had seemed a bit tight when I took it out - could possibly be why this connector failed.