Serial cable?

[bpimm]

I need to make an extension cable to get the serial connector out to the dash, does the MS use a strait through cable? no pin swapping like many serial cables.

Also does the ms need all 9 pins hooked up? if not which pins does it use?

Thanks
Brian

91 miata with 02 VVT running mspnp pro MM0105

Everything I'm finding online shows 2,3 and 5 hooked up strait through. I'm proceeding with this.

[DaveEFI]

You only need a twin screened cable for the serial connection to MS. The MS connector does have 5v present too - but it's not needed here with my serial to USB converter.

Decent balanced microphone cable (XLR) is a good choice - robust and flexible.

[bpimm]

Ok thanks,

I'm using a 3 conductor shielded cable I have on the shelf. Should I ground the shield and if so on which end MS or car.

[billr]

It is a straight connection, not crossed ("null modem").

I don't think it has to be shielded, but I would do that at the MS end, only.

[jsmcortina]

Only pins 2,3,5 are needed.

James

[bpimm]

Thanks guys, it's tested and working, now on to the next thing on the list...

[DaveEFI]

Ok thanks,

I'm using a 3 conductor shielded cable I have on the shelf. Should I ground the shield and if so on which end MS or car.

I'm using the screen as the ground with twin screened. I'd do the same with three core and screen - just ignore one of the three. There's not the same ground loop problems you could have with a screen on a sensor cable.

[benckj]

I'd terminate screen and ground wire to MS end. Also good idea to include pin 9 which is used for Bluetooth power. Nice to have phone or tablet running Shadow dash in cab. I'm yet to get mine working but have a few hints should you need.

Jim