ECU Pinout / Wiring diagram for NC (found)

[zombie]

Does anyone know where I could get my hands on the ECU pinout details? I'm assuming there's no difference between NC and NC2 (2009+)

I will be (or more accurately, my workshop will be) doing a parallel install - let the aftermarket ECU handle fuel and timing, and the factory ECU handle everything else.
I don't know of anyone that has done this before on an NC so I'm hoping we don't run into too many obstacles, but the first hurdle to overcome is working out which wires to splice ourselves into

I can find plenty of wiring diagrams and ECU pinouts online for NA and NB but nothing for NC

[Charlie Brown]

Try emailing Stephannie at stepht@bellengineering.net

or e-mail Xede on the Gold Coast.

Read here: http://www.bellengineering.net/articles.php?tPath=31_35

[Sailor]

Hi Matt,
Stephanie is a good source, I have the Xede files at home that I can forward if you want.
Also have a map from her adjusted to Oz fuel that she has done for me.

[greenMachine]

Interesting. Good on you for giving this a go.

What ECU are you proposing to use?

[zombie]

Hello Sailor

Any and all information you can send me would be helpful as I've not found anything yet.

I have been told by several people that a "parallel" install will not work on the NC, and will lead to the loss of ABS etc, so I will probably abandon that idea and achieve the result a different way.

Either XEDE or a custom reflash; I will let you know. Stay tuned

[Sailor]

Hi Matt,
That link to Corky's Begi page that Phil posted is well worth the look.
http://www.bellengineering.net/articles.php?tPath=31_35
Hunt around the site, there's plenty of info on the Xede.

PM me you email and address and I'll forward the map and the install info that I have.
With your Cosworth on a road car, the Xede appears to be by far the best solution BUT it will not allow you to increase RPM over std.
I examined Haltec but the driveability was my doubt plus it's nearly twice the price.

BTW waht are those wheels and where did you buy?

[zombie]

I've decided to go for a tuning solution by Moto-East - Mike Mann has spent many hours reverse engineering the MX-5 ECU (there are lengthy threads about it on the big forum - like this one) and has had much success tuning Cosworth cars including Faisal's (cyberbug)




He's cracked the RPM limiter too, although my NC2 already has a 7800rpm limit so I don't think I'll be going any higher than that.

The wheels are Gram Lights, by Rays Engineering - and I bought them right here, from a fellow forum member

[Sailor]

Ahhh, looks like a good choice but with plenty of delays and shipping costs as you send your ECU back and forth

[zombie]

Not so, you're confusing it with the DP tune, which was the other option I looked at. The Moto-East tune uses a box that connects via the OBDII port.

I also get software so that my local workshop can do the final tuning on the dyno, although Mike is able to do tuning from remote by emailing the maps back and forth, using data provided by a logger connected to the OBDII port.

[zombie]

I have been told by several people that a "parallel" install will not work on the NC, and will lead to the loss of ABS etc

I'd just like to say.. Bulldust!

As I mentioned in the Cosworth thread, I now have an Adaptronic e420c "Parallel" installed - it runs the injectors and coils, and the Mazda ECU runs everything else.

I got to go for a ride in my car today (the first time it has moved under its own power in over 4 months) and although I wasn't able to actually test them, there are no warning lights for ABS or anything else - and other than the drive-by-wire throttle being an absolute pain in the ass, all seems to be working well.

Anyway, to answer my original question that started this thread - the ECU pinouts for NC1 and NC2 (in Australia at least) are the same, and this is what I've been able to work out:

Code: Select all

Pin     Function                        Pin     Function                Pin     Function                        Pin     Function
1A       -                              1AE      -                      2A      Throttle Pos Sensor             2AE     -
1B      Starter Relay / Trans Range     1AF     Brake Switch            2B      Throttle Pos Sensor             2AF     -
1C       -                              1AG      -                      2C      Purge Solenoid Valve            2AG     MAP Sensor
1D      Clutch Pedal Pos Switch         1AH      -                      2D       -                              2AH     Engine Coolant Temp Sensor
1E       -                              1AI     HS_CAN_L Data Link      2E      Oil Control Valve               2AI     Generator
1F       -                              1AJ     Accel Pedal Pos Sensor  2F       -                              2AJ     Generator
1G       -                              1AK     MAF Sensor              2G      EGR Valve                       2AK     Throttle Pos Sensor
1H      Fuel Pump Relay                 1AL     Accel Pedal Pos Sensor  2H      EGR Valve                       2AL     Throttle Pos Sensor
1I      Aircon Relay                    1AM     HS_CAN_H Data Link      2I      Var. Tumble Solenoid Valve      2AM     Camshaft Pos Sensor
1J      Refrigerant Pressure Switch     1AN      -                      2J      Var. Intake Air Solenoid Valve  2AN      -
1K       -                              1AO     Accel Pedal Pos Sensor  2K      EGR Valve                       2AO     Throttle Pos Sensor
1L       -                              1AP     Accel Pedal Pos Sensor  2L      EGR Valve                       2AP     Throttle Pos Sensor
1M      Cooling Fan Relay #1            1AQ     Cruise Control Switch   2M       -                              2AQ     Crankshaft Pos Sensor
1N      Cooling Fan Relay #2            1AR     MAF Sensor              2N       -                              2AR      -
1O       -                              1AS     Accel Pedal Pos Sensor  2O       ?                              2AS      -
1P      MAF Sensor                      1AT     MAF Sensor              2P      Camshaft Pos Sensor             2AT     Ignition Coil #4
1Q      Main Relay                      1AU     Refrig Pressure Switch  2Q      Rear O2 Sensor                  2AU     MAP Sensor
1R      Cooling Fan Relay #3            1AV     Accel Pedal Pos Sensor  2R       -                              2AV     MAP Sensor
1S       -                              1AW      ?                      2S      Camshaft Pos Sensor             2AW     Ignition Coil #2
1T       -                              1AX     Drive-by-wire relay     2T      Power Steering Pressure         2AX     Ignition Coil #3
1U       -                              1AY      ?                      2U      Knock Sensor                    2AY     Engine Coolant Temp Sensor
1V       -                              1AZ     Ground                  2V      Knock Sensor                    2AZ     Fuel Injector #4
1W       -                              1BA      ?                      2W      Crankshaft Pos Sensor           2BA     Ignition Coil #1
1X      Trans Range / Neutral Switch    1BB     Ground                  2X       ?                              2BB     Fuel Injector #1
1Y       -                              1BC      -                      2Y       -                              2BC     Fuel Injector #2
1Z       -                              1BD     Ground                  2Z      Front O2 Sensor                 2BD     Fuel Injector #3
1AA      -                              1BE      ?                      2AA      -                              2BE     Rear O2 Sensor
1AB     Brake Switch                    1BF     Drive-by-wire relay     2AB     Crankshaft Pos Sensor           2BF      -
1AC      -                              1BG      -                      2AC      -                              2BG     Front O2 Sensor
1AD      -                              1BH     Ground                  2AD     Front O2 Sensor                 2BH     Rear O2 Sensor


[zombie]

and.. it would help to know in which positions the pins actually are...

[zombie]

One last thing for anyone considering an ECU reflash. Be very careful to follow the instructions exactly and above all make sure your car's battery is fully charged before commencing.

Replacement ECUs are NOT cheap

[orx626]

One last thing for anyone considering an ECU reflash. Be very careful to follow the instructions exactly and above all make sure your car's battery is fully charged before commencing.

Replacement ECUs are NOT cheap

Totally agree Zombie! In my experience I have found the re-flashing of RX-8 PCM's using aftermarket software (for FI) to be just a game of Russian Roulette.

BTW, NC's and RX-8's use the same PCM protocol(s).

Cheers,
Danny