Volvo On Call Service Problem
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Hi everyone,
I’m having a problem with the Volvo On Call system. The instrument cluster constantly displays: "Volvo On Call Service." When scanning with VDASH, I noticed that the control unit shows up in red.
Here’s what has been done so far:- Backup battery replaced
- Timer reset
- Swapped with another module (still shows up red in VDASH)
- Checked fuse 19 (5A) – it’s intact -
- Wiring looks fine
Additionally, the following appears in VDASH:
The following units are not responding or are not present in the vehicle:
PHM
Please check the wiring.
The specific error code for the PHM is: CEM-U019800
Additionally, the following codes are also present:
CCM-B1A6909 and IHU-B1D5513 recorded.
...which is why I currently suspect a potential "ground zero" issue.
Is there a specific spot on the Volvo XC70 P3 (Nov. 2015 model) with a sunroof that I should examine more closely? Somewhere a corroded ground point might be located? Or are there other possible causes?
Best regards
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@Phantom244 your error codes might be the result of water ingress from clogged sun roof drainages.
You can check the grounds under the driver and passenger doors for corrosion.
See here...
But there usually would be more codes if those are corroded as there are several modules connected to those grounds.
On cars with sun roof it's a known problem that water gets into the fuse boxes behind the glove box when the drainage is clogged. Your error codes for a to high signal from the humidity sensor that is located behind the rear view mirror and a code for a bad antenna signal are also indicators that water might have reached places where it doesn't belong to.
A loose windscreen that lets water in is also pretty common on P3 Volvos.
Are there really just the three codes you posted, or do you have more DTCs? Also temporary ones would be interesting. -
Hey @T5-T6-Schnappi,
I'm currently on vacation and checked the ground points today – you can do that without a laptop – and they do indeed look fine. The tip about the damp windshield is helpful, as there are indeed traces of water on the inside of the windshield. Is there anything I can check at the fuse box? I have a small tool kit with me to remove the glove compartment. Could you perhaps take a picture of the connector I should be looking for? That would be great.
The stored fault codes are:- CEM-U019800,
- CEM-U030141,
- CCM-B1A6909,
- IHU-B1D5513
(unfortunately, I can't attach a photo from my phone).
I've had the car for two weeks and would like to fix these problems.
Thank you very much for your time.
Best regards from Germany. -
@T5-T6-Schnappi
Can it also be that the antenna amplifier is defective?
