Transporter D+

[Owain]

Hi,

battery/battery is euro 6 charger wants a D+ (IGN+) shown as coming from alternator.

After racking brain/googling for weeks, i have paid for erwin end now see my t6 with start/stop has no D+ connection to alternator.

Alternator has normal negative, B+ and a LIN bus (cheap CAN alternative). So a "smart" alternator.

So what does D+ indicate? Is it a control signal to alternator or a status signal from alternator?

I could imagine the LIN is used to tell alternator to ramp increase/decrease load on engine, for breaking etc, causing power from alternator to incease or decrease.

Any suggestions greatly appreciated.

Don't we all long for the simple/good old days before all this computer shite. And that coming from a computer engineer....me.
,
All the best,
Owain



What

 

[Loz]

Any ignition live will do for the DC-DC charger.
As I was replacing the factory split charge relay for a DC-DC unit I used the trigger feed from the relay I removed.

 

[Dellmassive]

The factory OEM split charge relay has a wire run from the BCM that switched to +12v when the engine is running and cuts out when the ignition is switch OFF.

if you dont want to run the wire to the BCM you can take a +12v ignition feed from the SC fuse box under the dash . . . . (center line is ignition fed)


BCM connection J519 T73a/3 as hsown here > Second battery wiring diagram

T73a 73-pin connector, black
J519 Onboard supply control unit

.

 

[Pauly]

I think the point is the D+ means engines running where as an ign live just means key are turned (not necessarily engine running)
I have used an ignition live on mine and it’s fine just remember if you key on the B2B will try to charge from your engine batt

 

[Owain]

Super guys. So it's just a 12v signal to say its ok to charge from other battery.

After the hassle of tapping into the CAN for the towbar on that J73, I think I will take the easy option of Ignition feed.

Thanks for the quick responses. I'll get to finishing my wiring now.

 

[Thomas Hopkins]

Moving accross to installing the Sargent pms in our campers, can anyone provide any info on where I can pick up the d+ feed from the alternator for emc and the integrated split charge relay ?

cheers

Tom

 

[mmi]

https://www.t6forum.com/threads/victron-orion-signal-cable.23438/post-378381

 

[Dellmassive]

*****************************************************

POWER:

• [Guide] Victronenergy.com - Wiring-Unlimited PDF
• Diagrams, Schematics & Wires -- How I Done It --
• 
  
• Charging:
• Battery Chargers - How I Did It -
• Battery Charging - Main Battery Earth Point -
• Battery Monitoring -- How I Done It --
• [Guide] Battery Maintainer (for Starter battery) -- How I Done It --
• Which Jump Starter?
• Seat Base Electrics, EHU+Charger+solar+install - How We Done It -
• 
  
• DC-DC:
• Dc-dc Charger (for Leisure Battery) -- How I Done It --
• Charging Starter and Leisure batteries with same charger - Victron
• Stop/start...regen...smart Alternator... Dc-dc Charger For Leisure Battery Or Not?
• 
  
• 12v Feeds:
• Ignition Live Under Passenger Seat -- How It's Done --
• Installing 12v Sockets -- How It's Done --
• 12v Ignition Feed + 5xusb Charging From Ign Feed -- How I Done It --
• 12v Aux Feed + 5xusb Charging From Aux Battery -- How I Done It --
• 
  
• LIFPEO4:
• Lithium Lifepo4 12v Batteries -- Time For An Upgrade ? --
• Valence U27-12XP Lifepo4 Lithium Battery -- How We Done It --
• SUBZERO - low temperature lithium battery -- How We Done It --
• 12v Lithium Leisure Battery Box 138Ah 1766Wh -- How I Done It --
• 
  
• Other:
• Full Van Ecu Reset (capacitive Discharge) -- How I Done It --
• [Guide] 12v/240v Power Inverters -- How I Done It --
• Awesome 3-in-1 Battery Bank -- How I done It --
• [Guide] Fridges & Cold Beer -- How I Done It --
• [Guide] Flag Poles and Fairy lights -- How I Done It --
• Clamp Meters -- Which One & How? --
• Battery Cable Crimping Tool -- How We Done It --

******************************************************

 

[Dellmassive]

**************************************************
Dellmassive`s -- "how I Done It" -- Thread
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Kit List And Stuff -- How I Done It & What I Use --
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[Thomas Hopkins]

Hi guys,

thanks for these however I’m after a d+ feed from alternator not an ignition feed as it is to trigger the Sargent unit when engine running for ecm unfortunately the Orion doesn’t solve this.

Cheers

Tom

 

[Dellmassive]

The alternator has no D+ signal.... its LIN Bus controlled.

The D+ signal mentioned above is the BCM engine run signal that is used in the OEM setup to trigger the OEM SCR.

Thats the switched +12v you need.

 

[Dellmassive]

this:


.

*************************************************************

The T6 "Engine Run" feed from the BCM is shown here:

T6 - Second battery wiring diagram
Second battery for transporter ( not California)

www.t6forum.com

+12v switched on when RPM engine run is detected.

used by the OEM setup to switch a 80A relay that connects the second battery (old skool SCR)

conection : J519 BCM - T73a/3

*************************************************************

 

[Dellmassive]

Here ---->

[Guide] DC-DC Charger (for leisure battery) -- How I Done It --

DC-DC Charger (for Leisure battery) -- How I Done It -- ************************************************** Dellmassive`s -- "how I Done It" -- Thread ************************************************** Kit List And Stuff -- How I Done It & What I Use --...

www.t6forum.com

.

 

[gerry]

hi,
alternator or find the D + to connect a dc12 / dc12 to properly charge my auxiliary battery
I'm not looking for a + after contact because I have
but the d + of the alternator which will activate the charge regulator
because if I plug in after the ignition it drains the van battery
thanks gerry

 

[mmi]

T6 doesn't have D+ as such but instead there is "engine running" -signal available.
These should help:

[T6] Looking for the D+ signal wire in a T6

Well, while the flooring is up as I'm currently sound deadening the cab, I'm running new cabling to replace the Factory Relay Aux charger and the DC-DC charger asks for a D+ connection, instead of a ingintion live, so it can't drain the main battery. I'm assuming this is off the back of the...

www.t6forum.com

Victron Orion - signal cable?

Hi Guys, I installed my leisure battery today along with a Victron Orion B2B charger, looking at the manual it suggests I don’t need to run a signal cable to the fuse. I ran the cable anyway as I was not aware of this at the time. Does anyone have experience of using the fuse cable vs not...

www.t6forum.com

 

[gerry]

ho yes thanks@mmi