C3 Charging circuit diagram please Marc :)
Moderator: RichardW
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- Posts: 4809
- Joined: 11 Jun 2007, 16:17
- Location: Christchurch, Dorset. UK
- My Cars: 2005 C5restyle 1.6HDI 16v 110hp VTR Estate
2008 C5 X7 1.6HDI VTR+ Saloon - x 231
Re: C3 Charging circuit diagram please Marc :)
PM sent, Marc
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- Posts: 4809
- Joined: 11 Jun 2007, 16:17
- Location: Christchurch, Dorset. UK
- My Cars: 2005 C5restyle 1.6HDI 16v 110hp VTR Estate
2008 C5 X7 1.6HDI VTR+ Saloon - x 231
Re: C3 Charging circuit diagram please Marc :)
Last night, in the C5 I queried Lexia for a BSI parameter "Alternator Excitation Voltage" which clearly showed 0V engine off and 14.4v engine running.
The C3's insurance kicked in at midnight so got it taxed at lunchtime at a hefty cost of £20
Its' battery had consumed a lot of watts on charge overnight (I think this is a cracking battery for it's size!) and after reffiting, I consulted Lexia to compare the above Excitation Voltage reading.
It showed ~5V engine off and ~6V engine running but still the alternator did not start charging (yet ECO-MODE went off!) until rpms exceeded 3K (a little llower than last time).
While driving, excitation voltage was stable around 7V.
After a bit of driving fun and punishment, I stopped for refreshment and interrogated the BSI again. Values were the same except this time after starting, I didn't rev it but just pulled away sedately. The next time I looked at the Live Voltage data (as I changed up to second gear and sure I hadn't exceeded much over 2krpm if at all) I noticed the alternator had kicked in. Quirky or what?!
I've ordered one of those voltmeters for the ciggy lighter so I can more conveniently keep an eye on voltages.
The C3's insurance kicked in at midnight so got it taxed at lunchtime at a hefty cost of £20
Its' battery had consumed a lot of watts on charge overnight (I think this is a cracking battery for it's size!) and after reffiting, I consulted Lexia to compare the above Excitation Voltage reading.
It showed ~5V engine off and ~6V engine running but still the alternator did not start charging (yet ECO-MODE went off!) until rpms exceeded 3K (a little llower than last time).
While driving, excitation voltage was stable around 7V.
After a bit of driving fun and punishment, I stopped for refreshment and interrogated the BSI again. Values were the same except this time after starting, I didn't rev it but just pulled away sedately. The next time I looked at the Live Voltage data (as I changed up to second gear and sure I hadn't exceeded much over 2krpm if at all) I noticed the alternator had kicked in. Quirky or what?!
I've ordered one of those voltmeters for the ciggy lighter so I can more conveniently keep an eye on voltages.
-
- Posts: 4809
- Joined: 11 Jun 2007, 16:17
- Location: Christchurch, Dorset. UK
- My Cars: 2005 C5restyle 1.6HDI 16v 110hp VTR Estate
2008 C5 X7 1.6HDI VTR+ Saloon - x 231
Re: C3 Charging circuit diagram please Marc :)
Having had the ciggy lighter voltmeter to monitor I'm still no closer to a diagnosis. I have to rev the engine to get it charging as expected.
But what's with the excitation voltage wire only showing 6-7 volts (while on the C5 is battery voltage)?
Would it be ok to disconnect the BSI signal wire and supply battery voltage to the alternator as a test to see if it "excites" at idle speed?
But what's with the excitation voltage wire only showing 6-7 volts (while on the C5 is battery voltage)?
Would it be ok to disconnect the BSI signal wire and supply battery voltage to the alternator as a test to see if it "excites" at idle speed?