Ground Pins on DB37 (pcb V3.0)
I don't have my MS V3.0 with me, but I did notice an awful lot of ground pins.
I see a lot more inputs on the MS-II, and want to use those! Can I cut the little ground traces to the pins on the DB-37 (i.e. it's connected on the outer plane only) or are those pins hooked up on an inner layer of the board? It'd be much more slick to use the original connector instead of cutting a hole for another DB-9 or something. I really want to be able to log EGT's and I'm out of pins. Thanks!! -Abe. |
Even with using all of the SPR outputs you're running out?
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I've seen some harnesses where people only use 3-4 of the 20000 ground pins.
you filled all the spare and iac outputs? |
Er, well.... I'd forgotten I hadn't used SPR1 and SPR2, but I have used everything else.
Spare 1/2 are CANH and CANL, and if I'm already tight on inputs before even running the car, I have a feeling I'll be in the reals of a GPIO board soon - and I don't want to tie up those lines just yet. Then again, if I WERE to run another connector, doing it for GPIO would be how I want to do it. Then again - it just seems dumb to have 14 pins of a 37 pin connector wasted. If 30 seconds with a razor blade gives the V3.0 board as many i/o pins on the connector as there are on the CPU (dumb not to), I'm in. -Abe. |
i mean, i only use 2-7-8-9-17-18-19 as grounds...the rest ARE wasted, however, i don't need them....you only get to the point where the cover to your db37 connector is hard to screw shut because of so many darned wires :)
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I don't have a cover on my DB37.... :x:
-Mike |
Originally Posted by Braineack
(Post 188552)
I've seen some harnesses where people only use 3-4 of the 20000 ground pins.
you filled all the spare and iac outputs? which pins are grounds on the DB37*. my job over Xmas is to sort some grounds out....... *Yes I'm being lazy and not searching ;) |
1-2 7-8-9-10-12-13-14-15-16-17-18-19
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Originally Posted by Braineack
(Post 188639)
1-2 7-8-9-10-12-13-14-15-16-17-18-19
cheers Braineack :) |
1 GND
2 GND 3 SPR1 4 SPR2 5 SPR3 6 SPR4 7 GND 8 GND 9 GND 10 GND 11 GND 12 GND 13 GND 14 GND 15 GND 16 GND 17 GND 18 GND 19 GND 20 MAT 21 CLT 22 TPS 23 O2 24 TachIn 25 IAC1A 26 Vref 27 IAC1B 28 12 RAW 29 IAC2A 30 IDL 31 IAC2B 32 INJ-1 33 INJ-1 34 INJ-2 35 INJ-2 36 IGN 37 FP1 For that matter: 1 GND GND GND Both 2 GND GND GND Both 3 SPR1 Spare 1 CANbus High (unused) 4 SPR2 Spare 2 CanBus Low (unused) 5 SPR3 Spare 3 KnockSenseMS In 6 SPR4 Spare 4 Boost Control Solenoid PMW Out 7 GND GND GND Both 8 GND GND GND Both 9 GND GND GND Both 10 GND GND GND Both 11 GND GND GND Both 12 GND GND GND Both 13 GND GND GND Both 14 GND GND GND Both 15 GND GND GND Both 16 GND GND GND Both 17 GND GND GND Both 18 GND GND GND Both 19 GND GND GND Both 20 MAT Manifold Absolute Temperature GM AIT MS 21 CLT Coolant Temp Sensor OEM CLT ? 22 TPS Throttle Position Sensor OEM TPS ? 23 O2 WideBand O2 Sensors LC-1 MS 24 TachIn Timing Signal In Crank Position Trigger In ? 25 IAC1A Idle Air Control Coil 1 A Camshaft Position Trigger In 26 Vref Sensor Voltage Reference Output V_ref for TPS, ??? MS, AIT? 27 IAC1B Idle Air Control Coil 1 B VICS Out 28 12 RAW Switched Power, 12V Switched Power, 12V In 29 IAC2A Idle Air Control Coil 2 A Fan Control Out 30 IDL Fast Idle/PWM valve PWM idle Valve (add diode!) Out 31 IAC2B Idle Air Control Coil 2 B Ignition 2 & 3 Out 32 INJ-1 Fuel Injector Channel 1 Out Injector 1 & 4 Out 33 INJ-1 Fuel Injector Channel 1 Out Injector 1 & 4 Out 34 INJ-2 Fuel Injector Channel 2 Out Injector 2 & 3 Out 35 INJ-2 Fuel Injector Channel 2 Out Injector 2 & 3 Out 36 IGN Ignition A Out Ignition 1 & 4 Out 37 FP1 Fuel Pump Relay Out Fuel Pump Relay I'm going to post an excel version soon. Not done yet. I'm still deciding what to let the OEM ECU see. Right now I think it's alternator and AIT. Really, you can buy an alt controller for $12. So I might do that. SOON the evil mazdaness will leave my car. |
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