guzziriders.org - moto guzzi forum Homepage
Forum Home Forum Home > Technical > CARC models
  New Posts New Posts RSS Feed - No Crank
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

No Crank

 Post Reply Post Reply
Author
Message
hendy View Drop Down
Falcone
Falcone


Joined: 07 Aug 2017
Location: Fife
Status: Offline
Points: 95
Post Options Post Options   Thanks (0) Thanks(0)   Quote hendy Quote  Post ReplyReply Direct Link To This Post Topic: No Crank
    Posted: 07 Sep 2017 at 18:43
Sorry to raise an old chestnut, but my 2013 Stelvio has developed the 'click no crank'  problem.  About half the time.  I've read the lengthy FAQ on this but it's a bit confusing.  Has anyone fixed this on a late model Stelvio?  Is it primarily bad connections, or is a bypass wire essential?

Back to Top
johnno View Drop Down
Senior Member
Senior Member


Joined: 19 Jul 2014
Location: loughborough uk
Status: Offline
Points: 5582
Post Options Post Options   Thanks (0) Thanks(0)   Quote johnno Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2017 at 20:07
First thing check terminals are tight , second check battery is good by volt metre
1100 sport corsa , Yam R1, guzzi 650tt rider
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Offline
Points: 17641
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 07 Sep 2017 at 22:39
The late model Stelvio has two start relays, but one yellow wire feeding both. It's this yellow wire which is replaced by a direct feed from the battery, ensuring that both relays are still fed by this wire. Yes it has been applied to late model Stelvios.
 
As said above, check battery volts with a meter (don't rely on the dash information).
When running, the battery volts should be a minimum of 14v. If considerably lower than this then the battery will never be fully charged and the click no crank issue can arise.
There has been an issue on this model with the wire terminal on the back of the alternator not being crimped properly, causing low charging. See the other thread on Alternator wiring.
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
hendy View Drop Down
Falcone
Falcone


Joined: 07 Aug 2017
Location: Fife
Status: Offline
Points: 95
Post Options Post Options   Thanks (0) Thanks(0)   Quote hendy Quote  Post ReplyReply Direct Link To This Post Posted: 08 Sep 2017 at 09:50
Thanks for this information.  This should be enough to get me started with a voltage check and all relevant connections.
You'd think they would have cured this by now.
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Offline
Points: 17641
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 08 Sep 2017 at 10:19
It's only been going on since 1980 to my knowledge (others might be able to confirm earlier instances) so don't expect miracles.LOL
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
hendy View Drop Down
Falcone
Falcone


Joined: 07 Aug 2017
Location: Fife
Status: Offline
Points: 95
Post Options Post Options   Thanks (0) Thanks(0)   Quote hendy Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep 2017 at 17:15
Battery charging seems fine - 14.2V
There are no yellow wires entering the start up relay.  There is a thicker orange/green wire.  I assume that the heavier wires are the ones that feed the starter solenoid. I can confirm this with a meter.  What is the purpose of the starter maintenance relay?  The bike starts with this relay removed.
Back to Top
Brian UK View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Surrey
Status: Offline
Points: 17641
Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 09 Sep 2017 at 22:41
I have no idea, weird Italian logic.
The only wiring diagram I know of is for the earlier version which shows a yellow wire, same as all the other CARC bikes. http://www.thisoldtractor.com/guzzi007/schematics/2008_Stelvio.gif
Brian.

Better 5 minutes late in this world than years early in the next.
Back to Top
Ken-Guzzibear View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 13 May 2014
Location: Sileby Leics
Status: Offline
Points: 9454
Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 10 Sep 2017 at 17:53
the click no start was an issue on my 76 bike Bri' as in many other manufacturers the "designer" will not alter his/her logic .....
The Older i Get, The Better I Was
Back to Top
hendy View Drop Down
Falcone
Falcone


Joined: 07 Aug 2017
Location: Fife
Status: Offline
Points: 95
Post Options Post Options   Thanks (0) Thanks(0)   Quote hendy Quote  Post ReplyReply Direct Link To This Post Posted: 02 Oct 2017 at 22:19
Just a follow-up to this.
I carried out the mod to the relay but no improvement.
Battery voltage at 12.7V off charge.
Cranking voltage about 10.7 V
All connections are good and when the cranking occurs it is fast and starts the bike easily.
Holding the button in on 'no crank' blows the fuse, which implies that the solenoid is not fully engaging and therefore the pull-in coil is still energised.  After a few seconds with the hold coil still engaged the engine starts to crank and then starts. Of course it won't start again, because the 15A fuse is now blown.
This all leads me to think that the solenoid is getting "tired".  I stripped it and lubricated it, and it looks OK. 
So it looks like a new starter motor will be required.

I never could work out what the Starter Maintenance Relay actually does.  Maybe the dealer's diagnostic tools use it to crank the engine over?

Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.03
Copyright ©2001-2019 Web Wiz Ltd.

This page was generated in 0.063 seconds.