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S80 '06-'16 / V70 & XC70 '07-'16 General Forum for the P3-platform S80 and 70-series models |
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XC70 AWD Diesel (2014) - intermittent warning signalsViews : 700 Replies : 6Users Viewing This Thread : |
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Oct 10th, 2023, 17:23 | #1 |
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XC70 AWD Diesel (2014) - intermittent warning signals
Volvo XC60 4WD (2014 model) electrical faults
About 6 months ago, while driving, a warning light on the dashboard came on: "ABS Failure". Our service station engineer said that it was probably some dirt on the monitor. The message disappeared for a number of months. Then I noticed slight juddering of the brakes about 3 months ago. Then the message "ABS Failure" came on while driving a long distance. The message was not constantly displayed – it would sometimes come on after driving more than 100 miles continuously and may disappear while driving. It did not come on when braking. Then the message "ABS/ESC disabled" appeared – again intermittently for no reason. Then a message indicating that my one "tyre flat – Recalibrate Tyre pressure". On checking, the tyre pressure was not low at all. Then, most recently a message: "City Safety Service required" – this is now constantly on display. Actions to date: A Volvo service garage engineer in Italy did an electrical diagnostics test and said the right rear wheel ABS sensor was defective and should be replaced. But I found this unlikely to be correct, since it would not account for the other messages (particularly that a front wheel was low in pressure). I have ‘Reset Factory Settings’ but nothing happened. I have reset Tyre Monitor Calibration – but nothing happened. It seems to me that this is not a sensor problem but something wrong with the Central Electronic Module – am I right? (I note a thread on VOC regarding water ingress sometimes causing problems with the CEM and that “Volvo Diagnostics do a refurbished CEM for £260.00 which is plug and play”.) Please advise. (I am not particularly ‘technical’ unfortunately!) |
Oct 10th, 2023, 18:38 | #2 |
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I have read, on the swedish volvo forum, that a right rear wheel sensor fault is often indicative of bad soldering in the ABS unit itself. Not the hydraulic part of the unit, but the electronic part.
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Oct 11th, 2023, 09:59 | #3 |
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Don't forget that the electronic part of the ABS unit,-if you buy a new one or second hand, must be coded to your car to make it work, either at the volvo dealership or with VIDA.
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Oct 11th, 2023, 11:13 | #4 |
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Thanks Emtor - I would never have thought of the encoding issue!
Regards Stephen |
Oct 11th, 2023, 18:19 | #5 | |
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2014 Volvo V70 D4 (VEA) SE Lux Geartronic |
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Oct 13th, 2023, 08:42 | #6 |
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My xc70 2016 has similar false tyre pressures warning too .the dash warning appears to come up after driving in a stop/ go nose to tail traffic for a while. Each time I checked the tyre pressures and they were normal. I asked my local independent Volvo specialist and the impression given I got was the application is temperamental. I now just reset the warning routinely and live with the imperfection
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Oct 16th, 2023, 17:52 | #7 |
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Multiple electrical fault warnings - wheel malalignment
Problem solved.
I took the car to my local (non-Volvo) garage (Mickley Garage in Northumberland). On showing Barry the printout from the Forum, he looked sceptical. He noticed that a front tyre was wearing very unevenly. He replaced the front tyres and re-aligned the wheels. All the warning messages disappeared and the car is behaving very well. Thanks for your input anyway. Stephen Louw |
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