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XC 60 Help - Multiple warning messages

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Old Jan 16th, 2022, 13:46   #21
Socks 1985
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UPDATE.

Yesterday I decided to look for a any water ingress around the CEM. It was bone dry with all connections showing no sign of water damage. When I plugged everything back on. Same dash warnings but also the windscreen wipers will not turn off until I shut down the car. Great.

Any thoughts on this please? I’m still thinking SRS failure or CEM. It won’t even start most of the time & having to manually override gear to move it.

Thanks.
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Old Jan 16th, 2022, 16:28   #22
Socks 1985
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My fault. I had accidentally knocked the wiper arm.

Finished looking for water damage all around the car. No sign.

Sitting the car now with the engine running fine with heaters on full blast. RPM zero, eco display 0 with ABS amber, amber engine check. Anto skid amber, red brake light, airbag light red, red seatbelt warning. I cannot change gear or accelerate.

Information warning are as follows.

Break system failure stop safely
ESC service required
SRS airbag airbag service urgent
Park assist system service required
Coolant system malfunction service required
Power steering service required
Hand break service required
Engine system service required
Car key battery low

Pretty much every warning I would think.
Pulling my hair out now.
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Old Jan 18th, 2022, 22:27   #23
bluey_xc90
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This failure you have seen sounds very similar to what I've seen in my 2015 V60 Polestar engineered 3.0l. I've now had it experience why I can only explain as a hard crash of multiple systems in the car whilst driving - ending up with the engine cutting out, brake and power steering assist going in a dashboard which looks like a christmas tree.

Main dealer cannot find anything from diagnostics - it is with them at the moment. When it "crashed" the car was unable to restart, or release the braking system so had to be dragged onto a flatbed. We suspect the battery could be causing some issues, potentially not charging so causing the voltage to drop below a certain level and cause canbus system crashes. I'm getting them to put in a new genuine battery and also BMS sensor in case that has some intermittent fault (alternator tests good).

No evidence of earth fault, wear on cables or water ingress but will recheck when I get it back later this week. Interesting to see how the SRS module could be causing it elsewhere, sounds like a systemic failure as cars on this platform age?
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Old Jan 19th, 2022, 11:46   #24
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BTW one thing that was just found at main dealer was battery earth connection had corrosion on it - been replaced and this can cause canbus issues as under heavy load (heated seats etc) the voltage within the car can drop below critical levels causing the errors others have seen.

Worth checking as hidden away behind the battery
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Old Jan 20th, 2022, 22:00   #25
Shah
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Quote:
Originally Posted by Socks 1985 View Post
My fault. I had accidentally knocked the wiper arm.

Finished looking for water damage all around the car. No sign.

Sitting the car now with the engine running fine with heaters on full blast. RPM zero, eco display 0 with ABS amber, amber engine check. Anto skid amber, red brake light, airbag light red, red seatbelt warning. I cannot change gear or accelerate.

Information warning are as follows.

Break system failure stop safely
ESC service required
SRS airbag airbag service urgent
Park assist system service required
Coolant system malfunction service required
Power steering service required
Hand break service required
Engine system service required
Car key battery low

Pretty much every warning I would think.
Pulling my hair out now.

Don't pull your hair out. Do Read one of my threads. i had similar last December or so (2019).

Cost me £1500 PLUS MORE.... Volvo Specialist independent charged me £1500 and said it needed new ECU. That costs £1000+ and then his labour £500 to find the fault. After that he said it still had other faults so had to disconnect everything one by one and found it was the DEM module apparently giving too much voltage to the CEM causing it.

He then said he cannot replace the DEM and said it would probably cost £1000 more. I was really pi$$ed off. Then told me some guy some where in dagenham did it for £400 reconditioned but refused to give me any details... and said one of his customers had told him.

Managed to via luck locate this legendary guy who incidentally was 20 mins drive away by using ebay and searches and what not!

Guy said £140 for DEM reconditioned and £30 labour and not the £1000+ for new of £400+ second had not i was told by this reliable Volvo independent specialist.

I asked this guy about the CEM, said should not have been more than £200 odd plus £45 program fee as you don't buy a new one but say you need to update your current with say front and rear parking sensors and they give you one at a reduced price. He was shocked at the price.

THIS LEAD ME TO THINK perhaps the original fault was the DEM and not he ECU as the other guy had suggested...?

Moral of the story, check the DEM on the back wheels.
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Old Jan 20th, 2022, 22:05   #26
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Also the specialist independent had said it was corroded CEM due to water ingress. I could not see any sign of ingress. I asked him if that was the case, did you resolve the ingress problem and he mumbled yeah.. but then did not tell me what he resolved but started to show me CEM schematics and line wire diagrams and that he was talking to volvo technicians direct as no one had an answer.

So check the DEM module on the back wheels and see if that is blown.
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Old Jan 21st, 2022, 12:50   #27
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Good call on the DEM module - I've looked at haldex before on my old xc90 which had an error code on that and flushed the oil in it, but would not have considered it on my v60.

I'll try to get under to look if the issue reoccurs - anything electrical is a nightmare to disagnose if intermittent. As you say Haldex modules are easily repaired as common across multiple manufacturers
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Old Jan 24th, 2023, 16:42   #28
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Update on how I resolved my issue on my 15 V60 3.0l Polestar - the root cause of the problems looks to be the rear wash wipe hose which goes under the glove box. Removing this showed staining from the screenwash where it was spurting out at the joint (circled in red). This then was dropping down onto a high speed canbus connection (circled in orange) which when enough reached there was crashing the canbus system.

This meant that the car often ended up undrivable as the canbus network running all the modules was shorting to earth. Was solved (hopefully!) but cutting off the end of the hose which had gotten loose over time (and now secured with a small cable tie). All connectors will be checked and contact cleaner used on them.

Others have mentioned this as well but not with an explicit picture like this behind the glovebox. Main dealer tried to diagnose but the typical way of chasing via electrical diagnostic didn't work. Didn't help that it appeared the alternator had gone and not always putting out the current needed - this was replaced in dec and when the car failed again last weekend allowed this final diagnosis (after 2 1/2 years!) and 5 breakdowns..

So if you are only getting the electrical errors when it is cold/grotty road conditons and using the rear wash wipe regularly then this could well be the issue you are having!
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Old Jan 24th, 2023, 17:00   #29
RDesign4Life
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Quote:
Originally Posted by bluey_xc90 View Post
Update on how I resolved my issue on my 15 V60 3.0l Polestar - the root cause of the problems looks to be the rear wash wipe hose which goes under the glove box. Removing this showed staining from the screenwash where it was spurting out at the joint (circled in red). This then was dropping down onto a high speed canbus connection (circled in orange) which when enough reached there was crashing the canbus system.

This meant that the car often ended up undrivable as the canbus network running all the modules was shorting to earth. Was solved (hopefully!) but cutting off the end of the hose which had gotten loose over time (and now secured with a small cable tie). All connectors will be checked and contact cleaner used on them.

Others have mentioned this as well but not with an explicit picture like this behind the glovebox. Main dealer tried to diagnose but the typical way of chasing via electrical diagnostic didn't work. Didn't help that it appeared the alternator had gone and not always putting out the current needed - this was replaced in dec and when the car failed again last weekend allowed this final diagnosis (after 2 1/2 years!) and 5 breakdowns..

So if you are only getting the electrical errors when it is cold/grotty road conditons and using the rear wash wipe regularly then this could well be the issue you are having!
D1ckhead designers - running water pipes in concealed areas directly above sensitive electronics. If they had routed the rear wash wipe feed up and through headliner at least you would be alerted to a visible wet patch if it leaked rather than a full electrical shutdown of the car!

So after the dealer has failed on previous occasions to diagnose the problem correctly and has instead carried out unnecessary repairs at your cost they will now presumably be offering to refund you in light of their earlier incompetence?

Last edited by RDesign4Life; Jan 24th, 2023 at 17:05.
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Old Jan 25th, 2023, 09:39   #30
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In all honesty other issues were found which could have been the root cause - battery was not charging properly and the main ground cable was found to be badly corroded and green! Then before xmas the alternator was found to be intermittently charging. Potentially the short on the network had not helped on the signals there to it!

The dealer is a family run one not a big chain and to be fair they have also gotten volvo to help contribute to the costs so hasn't been too painful
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