DRL LED remains off after cold start?

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RdashP

RdashP

Joined
Jul 20, 2019
Messages
436
Location
Amsterdam NL
Gents,
Recently on a few occasions my DRL refuses to switch itself on at cold starts.
In the dash the DRL flashes on/off to indicate an error of some sort.

D9S730Xl.jpg


Funny thing, if I restart the bike after this happens the DRL comes back on normally and doesn't suffer same glitch for the remainder of that day.

At next restart, the odds are 50-50 the same strange issue reoccurs.

Any of you experienced similar DRL behavior and would know the root cause?
tx
 
Yeah right. I understand.
Indeed must be. or a slowly dying DRL LED unit?
Tx anyway. appreciate.
 
LED's don't die slowly, they are on or off
Did you do some work yourselves? Idk, changing windscreen or putting some carbon on the bike... maybe you touched a connector?
 
LED's don't die slowly, they are on or off
Did you do some work yourselves? Idk, changing windscreen or putting some carbon on the bike... maybe you touched a connector?
 
realnuts said:
LED's don't die slowly, they are on or off
Did you do some work yourselves?
Click to expand...

good point. tx. No. At least not recently.
I only connected a 12-5V DC converter properly fused directly to the Lion battery for charging my iPhone while on the GO as SATNAV.
I can manually switch this circuitry on/off, it works still fine and is/ came nowhere close to DRL cabling?
That was 1mo./2000km's ago w.o any electrical problems until last week.

Besides, I did this in a very cautious manner, i.e. proper soldering and insulation (while still DISconnected from bike). Having an ICT-electronics background myself.
Hmmm strange it is indeed. :confused:
 
Last edited:
I have had this happen about 3 times now.

Exactly as described, headlamp light on dash flashes and NO DRLs. Turn off and restart, all ok.

I asked my dealer and they said they haven't heard of it. When I get the chance I will pass by and see if there are any stored codes.

Cheers
Bub
 
Indeed strange, isn't?
Let's report back here once our dealers found something or when issue gets worse. grtz
 
Today she refused to switch on DRL once again only during first cold start.
One restart was again enough to activate DRL normally not to reoccur during the remainder of the day, incl. re-starts.

FYI previously DRL was setup as ‘manual’ never to experience this ‘cold start’ DRL initialization error. Now I’ve configured DRL to ‘Auto’ which is more convenient.

Could there be a software bug �� introduced after my last dealer software update?
Still doesn’t make sense, since to my knowledge is code not temperature sensitive.

Or does the V4 go in some sort of hibernate mode after a few days, resulting in a different initial reboot script when woken up for the first time.
If so, could this presumed ‘resuscitation’ code be to blame? #guesswork
 
Last edited:
Well my Duc tech believes that the on-screen DRL-LED error seems very likely to be 'battery related':

i.e. when V4 is stored for prolonged time, both my DDA-USB stick and Ducati Alarm installed drain the battery beyond minimally required for a healthy initial cold start of the engine.

When the smart ECU measures this low capacity battery situation while cranking, it cuts power to all secondary processes like the DRL-LED in order to safeguard sufficient juice for the primary process at hand: starting of the engine.

Strangely the on-screen flashing DRL-error, as result:
a) doesn't generate a logged CANBUS error
b) is not automatically fixed by the ECU after the successful cold start is completed by reinitiating sufficient power to this module. Therefore will only be cured - with current firmware config - after a full off/on re-start is initiated by rider when the battery is somewhat re-charged by idling engine.

As trial, he advices me - with these accessories constantly dorment/active - to put V4 always on a trickle charger when in garage.

The coming months, I will check if constant charging when stored will indeed mitigate this DRL-LED error.
 
Last edited:
little update:
DRL switching off right after cold with in-dash blinking DRL-error icon persists, regardless of PV4 now constantly on a charge when stored.
After a simple restart when ridden a few miles fixes issue almost always for the rest of that day to once again return the next day at cold start.

Dealer is puzzled as well and now suspects the original Ducati alarm to blame.
They want to uninstall Duc alarm from can-bus to further rule out this as source of the DRL going in error state right after cold start.

I'm not sure.
Maybe my dealer should ask Bologna for expert advise and analysis via a YouTech request to have HQ wizzard Guiseppe take a look at this?

I find it surprising that nobody but me on this forum has this DRL error @coldstart. :(
 
You might find you are one of the few that have installed the Ducati alarm, thus giving anecdotal weight to your dealer's suspicions.

What about Bubgale, does he have the Ducati alarm? (I don't know how to link him into this post.)
 
Pete T said:
You might find you are one of the few that have installed the Ducati alarm, thus giving anecdotal weight to your dealer's suspicions.

What about Bubgale, does he have the Ducati alarm? (I don't know how to link him into this post.)
Click to expand...

good point. Additionally, DMS and DDA modules are also added to the accessory mix. But these 2 are I guess more commonly installed add-ons?

Even though DMH specifically added add-on connectors for them all, having them all installed might just have introduced an untested bug?

Hereby I'll ask @BUBGALE (fyi just add @[USERNAME] to have them notified)
 
RdashP said:
good point. Additionally, DMS and DDA modules are also added to the accessory mix. But these 2 are I guess more commonly installed add-ons?

Even though DMH specifically added add-on connectors for them all, having them all installed might just have introduced an untested bug?

Hereby I'll ask @BUBGALE (fyi just add @[USERNAME] to have them notified)
Click to expand...

Hi Dude,

Nope, excatly the same. My bike is an early 2018 UK S without any alarm. I use an Optimate Lithium 0.8A optimiser.

I too thought like you it could be a slightly low battery causing the error but it randomly does it if the bike has been left a couple of weeks or taken off charge within hours. Everything you've written I agree with 100%.

A UK guy in one of the Facebook groups had issues with his DRLs and it ended up needing a new dashboard.

I'm surprised more haven't had this issue TBH.
 
BUBGALE said:
A UK guy in one of the Facebook groups had issues with his DRLs and it ended up needing a new dashboard.

I'm surprised more haven't had this issue TBH.
Click to expand...
Hi & great to hear from you and your re-confirmation!

Your reply strengthens my belief that my PV4 OEM accessories are not to blame here.

Maybe too much asked, but can you please also have your dealer ask Bologna for expert advise and analysis (aka RCA) via a ‘YouTech‘ request to have HQ wizzard Giuseppe take a look at it?

This way DMH HQ at least will get 3 VINs on file with same symptoms in slightly different configurations for future dealersupport and update their DMH knowledge base accordingly.

I wouldn’t be surprised if DMH is already aware of a few early production VINs suffering this DRL error. Yet our individual dealerships are ‘reinventing the wheel’ troubleshooting the by them unknown rare root cause! #waistoftime

Besides, if one of those VINs already got its dashboard replaced as solution then this remedy is probably advised by Giuseppe as well for both of us too.

Interesting: we both have PV4’s from initial year of production. Mine with #173 is even one of the first batches.
Cheers & good weekend
 
Last edited:
RdashP said:
Hi & great to hear from you and your re-confirmation!

Interesting: we both have PV4’s from initial year of production. Mine with #173 is even one of the first batches.
Cheers & good weekend
Click to expand...

Hi Dude,

I took my bike for service on Friday and would you believe the fault was there all the way (about a 30 min ride). I turned the bike off and on about 4 times and it still remained, only the manual headlamp button worked but the dash warning still flashed. I showed them when I arrived and turned it off and on again and it was fine again!

I told them about this thread.

Lets see if they have any luck, hopefully they'll send some logs to Italy too.

Cheers!
 
RdashP said:
Dealer is puzzled as well and now suspects the original Ducati alarm to blame.
They want to uninstall Duc alarm from can-bus to further rule out this as source of the DRL going in error state right after cold start.
Click to expand...

Finally had some time to disconnect my Ducati Alarm installed in the nose.

S2WshbRh.jpg


Coming days I will start her cold without this accessory to check if this makes any difference?
To be continued...
 
Last edited:
I'm sure the dealer did it as a dummy check, but might be worth taking a look at the connector itself. I have that flashing DRL error because I disconnected my lights completely. Perhaps the connector is faulty and it is not always recognizing the lights being plugged in on initialization. I'd take a look at it, maybe throw in a bit of dielectric grease, and see if that is possibly the issue.
 

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