xc90 Transmission Service Required ECM-5310 & TCM-002F

[MissSpentYouth]

OK dedicated some time to looking at this this morning.
Used Vida to check the current through the solenoids all look OK but also buzzed them out from the TCM connector to be sure and all good.
Removed the two speed sensors to check for damage the rear one had very badly oxidised contacts but made no difference. Monitored the speed outputs on Vida and both seemed to correlate.
Discovered a TCM test mode in Vida which displays which gear is selected and also the status of the lock-up function solid yellow triangle for locked and flashing for slip mode.
Took it for a test drive and basically if I drive like a granny the transmission works perfectly with the solid yellow triangle coming on in the higher gears indicating torque converter locked
However if I prod the accelerator the triangle immediately changes to flashing indicating slip mode and I can see the revs rise faster than my speed, the warning message pops up shortly after 'Transmission Service Required' followed by limp mode were it jolts into 4th gear and stays there permanently.
Spoke to an auto repair specialist familiar with these boxes and he confirmed my suspicion that the clutch in the torque converter that locks it out is worn out and needs new friction plates.
So in effect my transmission is just like a manual car with a worn out slipping clutch, however fixing it is allot more complex and expensive.
The ECM-5310 DTC looks to be a red hearing and has cost me loads of time checking things out electrically.
Anyway I have learnt allot and am confident that reconditioning the box will resolve my problem.
Thanks for all your help. cheers Ben

[MissSpentYouth]

Just to cover this one off in case anyone else has the same problem in the future.

The auto transmission oil cooler which is part of the main radiator had split internally allowing engine coolant into the gear box oil. The glycerol in the coolant then prematurely wears the friction linings in the lock up clutch which lives inside the torque converter leading to premature failure.

I have now had these friction linings replaced plus the other two clutches in the gearbox, plus a bush which is known to wear. Gear box now back in the car with fresh oil and a new main radiator.

Car runs perfectly now and that odd communication error ECM - TCM message has disappeared.

Morale of the story if your car starts using coolant then jump on it straight away there is also another engine oil cooler on the back of the sump that can fail in the same manner allowing coolant in to the engine oil.

If you have forked out for a new gearbox would advise fitting a separate oil cooler just in case you main rad packs up and trashes your new box

[Aj11r]

Thanks for keeping the post updated with your findings. I have the same issue and just received a laptop with VIda and CIDA so about to start the same process.
Before I go any further can you advise how much the full autobox repair cost?

Thanks

Alan

[Sceptre63]

This has been an interesting read. Thank you for spending the time writing about your experiences.

I have the fault ECM-5310 only which I cannot source the issue. (I also have the AYC Sensor not calibrated (BCM-0112), which at the moment is the least of my worries).

An observation against the repair specialist regarding the friction plates, on occasion I have noticed a hot-clutch / slipping clutch smell. It is interesting as this was a few months ago, but did notice it recently. Maybe this is early signs of the 002F code?

My fault seem intermittent as I can hookup VIDA and run diagnostics and then test drive, where I cannot get the fault to re-occur. I can then let the car sit overnight then attempt to use in the morning, 15 mins down the road the fault reoccurs. I say intermittent, once VIDA is hooked up it runs fine, but once it is not, it reoccurs!

Ben, can I ask where you had the work done and ball park repair costs?

Alan, how far did you get?

[john langrick]

Sorry about resurrecting this old post but... Xc90 d5 2003 160k

Exactly the same symptoms.

Losing coolant - cannot find any leaks externally, I searched and my indi garage searched.

Fault code 002f transmission lock up failure. I did the first long journey in my ownership (400miles and back) and had a slight judder and transmission error. Coolant became low as journey continued.

I believe I have now to replace transmission and torque converter. I am taking the car back to my indi garage to have oil checked but expect the worst. I assume water ingress will be evident in the oil. Incidentally, currently the car drives fine and selects all gears and no error codes since clearing.

Although car is old I am prepared to get it sorted, even though I have spent a fortune this year.

I live in Essex, any recommendation of local transmission expert and cost would be very helpful..

I hold my breath....

And a big thanks for the previous posts.

John l

[galloot633]

Originally Posted by MissSpentYouth

Hi All,

I am just trying to sort a problem I have with my xc90 d5 auto 2004.

If I drive it for a bit and then decelerate in 5th I get Transmission Service Required pop up followed a short while latter by a jolt as the box locks itself into 4th gear as a sort of limp home mode to protect itself from overheating. Display changes from D to -- hill starts become problematic and very slow to pull away. If you stop and turn it off and back on again then you can get back to normal operation albeit with the message in the display.

Gearbox works perfectly up until that point.

Codes from Veda are -

ECM-5310 communication error with TCM - Communication fault
TCM-002F lock-up function slipping or not engaged

If I clear the codes the 002F goes but 5310 remains.
If I pull the TCM out of its socket and replace it then I can clear 5310.

Both codes return after a drive when I get the Transmission message pop up.

So far I have cleaned the 3 solenoids in the valve body and flushed the transmission fluid. This seemed to make shifting worse but I couldn't complete the adaptions process that well due to the above fault. Then replaced the valve body with a new one, now shifts like a new car. Swapped the TCM for a known good unit. None of the above made a difference.

Don't know whether to focus on 5310 which tells me ECM and TCM have issues talking to each other on the CAN bus, I think I will pull both and try and clean the connectors and sell if I can get to the back of them. This seems unlikely to be my problem as they are sat right next to each other in a dry box.

Or focus on 002F which says there is a speed discrepancy between two sensors which should be locked together.

I think I need to try and read the codes after I get the Message but before it bangs into 4th as 002f might be a result of this harsh emergency shift.

Maybe also need to investigate the reported oil temperature as this lock down into forth is a designed feature of the box if the oil temp gets to high.

There are a number of posts on the internet for this exact fault but no one seems to have fixed it.

The oil was very dark but did not smell burnt prior to the flush. The car does have a tow bar so may have done caravan work in the past.

Any help much appreatiated

How much of a job is it to remove the solenoids ?
Dave

[Sean1978xc70]

The TCM can also lose comms when the DEM fails. I am having this issue now.

[john langrick]

Just noticed I never updated my comments on this thread.

In summer ladt year I replaced the rad and had a full flush of the gearbox.

Now, after 5000 miles, no further problems.


John l