I searched the forums but found nothing - if this has been covered feel free to tell me where to look.

I have a Haltech Elite 750 Miata PnP kit on a NA6, and it doesn't see the TPS. I have a Flying Miata (BMW) TPS kit that is plug 'n play, (supposedly) they do have instructions for what the pin-outs are - problem is with the PnP kit I don't know what to change to match what the Haltech is looking for. Do I need to change the pins for Haltech to see the TPS, or maybe I am missing something entire too simple?

TIA,
Dave

 

I had the same issue. I believe the pins on PnP TPS harness need to be switched around. Can't recall exactly which ones. There's power, ground and signal. Check with volt meter which one is ground by doing the beep test and then find which one is power by measuring volts.

Haltech PnP box reads the wires it a bit different than megasquirt ECUs for TPS signal

 

Thanks. Flying Miata's instructions tell me which pins are what, but that doesn't help tell me which pins need to get changed since the TPS ties into the OEM harness. If it went straight from TPS to the Haltech it would be simple. FM instructions are here: TPS_upgrade_kit_07-36019.pdf

 

OK I figured out the pins, and I confirmed the middle (ground) pin does ground. one of the other pins is 5v but I don't get any voltage from it with the key in the run position - does the engine actually have to be running for the 5v to show up at the TPS?

 

For anyone looking for the solution - the fix it to tap 5v from one of the available additional 5v outputs on the PNP adapter. Apparently, this is only needed on the NA6.

 

1.6 doesn't have a variable TPS, hence your adapter to run the BMW TPS. So there isn't 5v at the TPS plug from factory. There's only two inputs, one for idling, one for WOT.

There are two types of aftermarket ECUs, those that pin 5v to one of the inputs assuming you're changing to VTPS, and those that don't. Haltech and Link run it as factory, so you could technically run it as stock, as long as you can tune with only a MAP signal and no TPS. MSpnp models pin 5v out to one of the inputs that can be enabled by moving a jumper.

5v is available for automatic cars at 2k at the ECU or pin D at the AFM, you can move 2L to 2K to have 5v at the TPS plug if your ECU has pinned 5v there for auto cars. I know Link does, not sure about Haltech.

Sounds like you figured all this out, but I figured I'd type it out for anyone else reading this.