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Discussion Starter #1
Hi V40 Club members,
I had my service guy try to clear the warning of start stop yesterday while he performed our service 42k kms
He had no luck in clearing the warning with his Volvo scan tool , ( This was a service by a Volvo specialist Non dealer)
He said I could try and disconnect both batteries and see if the message cleared after that ,
My question is has anybody had to do this before to clear fault warnings ?
Both batteries were renewed about two months ago as a low battery warning came up every now and then the warning was displayed after
the batteries were changed .Only good thing about this is you don't have to turn off start stop function , but you have a warning message to
clear after start up.
Regards 2015 V40T5CC
 

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What warning is it? If it's telling you that start/stop is disabled, you can look up the reason in the My Car menu.

The handbook lists numerous reasons why start/stop may be disabled at any given time.

Were the new batteries exactly the same as the ones they replaced? Were they registered in the battery monitoring system with VIDA or a capable diagnostic tool, and the new values entered if different?

Low battery warnings are quite common and fairly normal if you don't use the car for a couple of weeks, only make short trips or use the radio with the engine not running. The BMS keeps the main battery at 80% SOC to allow headroom for regenerative charging during the drive cycle, so the headroom for current draw is much lower on start/stop vehicles than vehicles without such systems, where the aim is always to keep the battery as near to fully charged as possible.
 

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Discussion Starter #3
What warning is it? If it's telling you that start/stop is disabled, you can look up the reason in the My Car menu.

The handbook lists numerous reasons why start/stop may be disabled at any given time.

Were the new batteries exactly the same as the ones they replaced? Were they registered in the battery monitoring system with VIDA or a capable diagnostic tool, and the new values entered if different?

Low battery warnings are quite common and fairly normal if you don't use the car for a couple of weeks, only make short trips or use the radio with the engine not running. The BMS keeps the main battery at 80% SOC to allow headroom for regenerative charging during the drive cycle, so the headroom for current draw is much lower on start/stop vehicles than vehicles without such systems, where the aim is always to keep the battery as near to fully charged as possible.
Hi,
The Warning just says (Stop Start System require service) words to that effect. My mechanic was trying to reset the batteries with the BMS to clear the Advise Warning but it would not clear .As far as i know he has the Suitable tool for diagnosis and resetting as his clients are mostly Volvo drivers. So I assume he tried all avenues there. He is currently contacting Volvo to see if there is a reason it wont reset .He is yet to let me know on that matter . The batteries are not Volvo Branded but are equal or better in capacity I think the main is a 780 amp hour agm instead of 760 Volvo and the second small one is 14 amp hour agm of the same dimension compared to 10 amp hour Volvo brand . He added that I could try and disconnect the batteries and reconnect to see if resets .I have my doubts, but may be worth a go .
 

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Hi,
The Warning just says (Stop Start System require service) words to that effect. My mechanic was trying to reset the batteries with the BMS to clear the Advise Warning but it would not clear .As far as i know he has the Suitable tool for diagnosis and resetting as his clients are mostly Volvo drivers. So I assume he tried all avenues there. He is currently contacting Volvo to see if there is a reason it wont reset .He is yet to let me know on that matter . The batteries are not Volvo Branded but are equal or better in capacity I think the main is a 780 amp hour agm instead of 760 Volvo and the second small one is 14 amp hour agm of the same dimension compared to 10 amp hour Volvo brand . He added that I could try and disconnect the batteries and reconnect to see if resets .I have my doubts, but may be worth a go .
Just had a quick look at the Drive E/ Electrical section , reason= (Still charging and or temp is too low) start stop therefore is disabled.
 

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Just had a quick look at the Drive E/ Electrical section , reason= (Still charging and or temp is too low) start stop therefore is disabled.
That's quite normal, but would be accompanied by a start/stop disabled message in My Car, not a warning on the cluster.

There's an older thread relating to the Stop/Start Service Required message, which was identified as a faulty auxiliary battery:

 

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Discussion Starter #6
That's quite normal, but would be accompanied by a start/stop disabled message in My Car, not a warning on the cluster.

There's an older thread relating to the Stop/Start Service Required message, which was identified as a faulty auxiliary battery:

Cheers quite a bit of info there , I'm sure i'll sort it, not that its that big of a deal ! It's just nice to have it all work as intended.
Regards Gmc
 
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