Anyone tell me ? Is it safe to assume it would be the rating of the connector rather than some other limitation ?
thanks ---john---
Current restrictions on PNP Aux Connector VBat pin
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pat
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Re: Current restrictions on PNP Aux Connector VBat pin
Hiya John!
The other limitations you may need to take into account are....
1) That VBAT pins come from the vehicle's +12V feed so try to bear that in mind. I know that on some other ECUs there have been instances of the EFI fuse blowing. I have not seen this happen on an S6 yet but if you start drawing too much current then this could happen.
2) The VBAT trace on the carrier is typically implemented as a partial power plane which should vastly exceed the rating of the pins connected to that net. Without knowing which PnP board you are using I can't look at the layout to find the exact rating of that partial power plane; I don't recall any thermal deratings due to trace widths but I also don't want to say "yes you can definitely draw X amps" without checking the layout!
3) There is a limit on the 12VOUT pin, and that pin is only fed up to ECU serial #399. It was a low current auxiliary 12V feed that hardly ever got used, and most of the time when it did, it was by accident / misused.
Cheers,
Pat.
The other limitations you may need to take into account are....
1) That VBAT pins come from the vehicle's +12V feed so try to bear that in mind. I know that on some other ECUs there have been instances of the EFI fuse blowing. I have not seen this happen on an S6 yet but if you start drawing too much current then this could happen.
2) The VBAT trace on the carrier is typically implemented as a partial power plane which should vastly exceed the rating of the pins connected to that net. Without knowing which PnP board you are using I can't look at the layout to find the exact rating of that partial power plane; I don't recall any thermal deratings due to trace widths but I also don't want to say "yes you can definitely draw X amps" without checking the layout!
3) There is a limit on the 12VOUT pin, and that pin is only fed up to ECU serial #399. It was a low current auxiliary 12V feed that hardly ever got used, and most of the time when it did, it was by accident / misused.
Cheers,
Pat.
Re: Current restrictions on PNP Aux Connector VBat pin
IIRC the connector current rating is 5A...which is probably way less than the (partial) power planes anyway?
Re: Current restrictions on PNP Aux Connector VBat pin
Thanks, both your responses exactly echo my concerns hence the question.
Giving me a pin called Vbat it terribly convenient next to the spare Ign outputs. The concern was, is it man enough to supply lets say 4 newage coils, or a couple of AVCS Sols. ?
Well aware that the 12v out was low current and really for use with 12v sensors. Never even pinned it it in any GP loom I've done
Giving me a pin called Vbat it terribly convenient next to the spare Ign outputs. The concern was, is it man enough to supply lets say 4 newage coils, or a couple of AVCS Sols. ?
Well aware that the 12v out was low current and really for use with 12v sensors. Never even pinned it it in any GP loom I've done