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FŌJI Raceworks
Oliver's silver Mk2.5 with the bonnet up, the rebuilt 1.8 VVT in the bay with its loom, coils and stainless manifold in view.

Reference

Wiring

Connector references we draw ourselves, to the real plug face, with every pin and its wire colour.

ECU and PCM pinouts

Every sheet is a FOJI original drawn to the real connector face, and every one carries the same rule: ring the pin out on your own car before you cut or crimp.

A crop of the FOJI Mk1 NA ECU pinout sheet showing the 22-pin connector 1 plug face, every cavity lettered and tinted by function, with pin 1A ringed red at top-right.
1989 to 1997

Mk1 · NA

Three sheets, the early 1.6, the 1994 to 1995 cars and the OBD-II NA8, confidence high on the 1994 to 1995 sheet and medium on the other two.

A crop of the FOJI Mk2 NB1 ECU pinout sheet showing the 22-pin connector 1 plug face, every cavity lettered and tinted by function, with pin 1A ringed red at top-right.
1998 to 2005

Mk2 · NB

The NB1 and the NB2 VVT sheets, both OBD-II, three connectors each, confidence high on both.

A close crop of the FOJI PCM pinout sheet for the 2006 to 2015 MX-5, showing the connector 1 plug face in four rows of fifteen cavities with pin 1A ringed red at top-right.
2006 to 2015

Mk3 · NC

One sheet, drive-by-wire and CAN, two 60-way connectors and 120 terminals, confidence high.

A close crop of the FOJI pinout sheet for the 2018 on MX-5 PCM, the 114 way connector 1 face with pin 1A ringed red at top-right and every cavity tinted by what the pin does.
2015 on

Mk4 · ND

Two sheets, one per PCM, split by build number rather than by engine, confidence high on both.

Rotary sheets

Two rotary sheets are drawn to the same standard, and Autodata publishes no rotary, so there is no second publisher behind either set of colours.

RX-8 · SE 13B-MSP

2003 to 2012

Confidence: medium

RENESIS 13B-MSP, VIN JMZ SE173*** 300001 on. Denso PCM, two 60-way connectors, 120 terminals, drive-by-wire, CAN, immobiliser.

Download this sheet (PDF, A4)

RX-7 · FD 13B-REW

1992 to 2002

Confidence: medium

13B-REW sequential twin turbo, VIN JMZ FD13B200 300001 on. Mazda EGI control unit, 22 plus 12 plus 16 plus 26 way, 76 terminals, OBD-I self-diagnosis.

Download this sheet (PDF, A4)

Diagnostic port

The engine-bay diagnostic box is a separate connector from the ECU, where base timing and fault codes are read, and it is a Field Note.

Connector atlases

We are building connector atlases, every plug on the car, one per generation, from the factory wiring books. They will be listed here.

Wiring Or A Standalone?

If you are wiring in a standalone, adapting a loom, or chasing a wiring fault on your MX-5, tell us about the car and what you are trying to do.

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