Nb2.5 Immobilizer Wiring Diagram & Questions

rusefi · Nov 12, 2016

I've tried searching but no luck so far. Would anyone happen to have the wiring diagram for NALDEC NC8767790 MK2.5 BURGLAR ALARM MODULE? That's UK market NB2 immobilizer unit I believe.

I have that module and a matching ECU and a matching key and the transponder coil and some pieces of harness, trying to make a harness for my NA conversion. My own NB2.5 mazda is a US model and it looks like different immobilizers.

I am a bit surprised by how many wires go to this module, I would expect just power and indicator light and transponder coil and data line to ECU - USDM version has one connector and 7 wires, but EUDM (UKDM?) has about 15 wires.

rusefi · Nov 13, 2016

I've actually opened the unit and I am pretty sure the three wires on the white connector are power/GND.

Black wire is GND for sure from my naive PCB poking.

Guessing based on US version wiring blue/red would be "hot all times" and black/write would be "hot in run/start"

Anyone with a 2001-2005 with steering lock exposed for any reason? What are the wire colors at the coil/antenna white 2 pin connector? The outer plastic ring on the lock is the antenna, there are two white twisted wires, so what's on the other end of that connector? US version says yellow/green and yellow/red but I do not see a yellow/red on the harness I have.

US version http://www.mellens.net/mazda/mazda_miata_extra_manual/2003_wiring.pdf page 4

rusefi · Nov 17, 2016

Anyone with https://mapps.mazdaeur.com/mud/registerio.html access? I would love to reimburse €10.00- looks like a UK address & UK card would be needed to get access to MESI which hopefully has the wiring diagram I am looking for?

rusefi · Nov 22, 2016

I am an idiot, what I am looking at is not the immobiliser - that's another security piece.

Nb2.5 Immobilizer Wiring Diagram & Questions

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