Ach stark 
️
Danke dir schonmal für die hilfreichen Tipps.
Wenn ich aus dem Urlaub zurück bin, werde ich direkt das CEM checken und die Steckverbindung an der A-Säule höher der Klappe des Handschuhfachs hinter der weißen Abdeckung.
Werde mich danach nochmal bei dir Rückmelden.
Can you send me the link?
Thanks!
@T5-T6-Schnappi
Can it also be that the antenna amplifier is defective?
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:
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.
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:
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
