Can someone take a look at these pics and tell me exactly WHERE on the lm815 circuits should I wire the CAS inputs to?

This is a series 5 setup, using a 2.2 board, the wires for the Ne and G inputs (both + and -) are wired into P5 on the daughterboard, which seems to be just a plug. From here I know I need to condition the circuits with the proper resistor to a certain pin on the lm815 circuit, but which one pin? This is the last step in my way to get thsi thing working... any help will do thanks!

 

I think P5 is set up like this, but I could be wrong, there isn't alot of documentation on that extra card...

 

I guess I didn't mention before that I have no experience doing anything like this before.... but that doesn't do me much good. I'll clarify: Is it possible then to just solder in the required resistors from the respective points at P5 to where they need to go at the lm1815 circuits? And then further, exactly WHICH prong is the number 3 and ground for the chip?

 

Ok, I think I found it, can anyone verify this for me:

looking at the LM1815 as the picture above is oriented the pinouts go:




14 13 12 11 10 9 8

lm1815

1 2 3 4 5 6 7



So I can just run the resistor to 3 and the grounds then to 2?

 

Ok, I found some info on this daughterboard and it seems that everything is hooked up correctly, but it's still not starting up. LEDS's aren't flashing and the Tach isn't reading anything.....

I'm giving up on this. Anybody want to make a quick buck and wire this thing together for me, shoot me a PM; I'd pay top dollar for the help!

 

The most likely cause of the behavior you're seeing is bad wiring in the car. Most typically, I find that dirty grounds, or grounds that are run wrong causing ground loops are the cause of this sort of problem.

Ken

 

Thanks, I'll be running new grounds this weekend....hopefully that will do it.

Until then I've double checked all the pinouts from the MS to the stock harness and the only doubts I have are these:

Coil or Tach terminal (pin 24 on the MS) should go to ECU 1G? (series 5)

and then for some reason or another the LED's were wired up to pins 15, 16, and 17 instead of pins 14, 15 and 16.... is that going to be a problem? The LED's are wired with the proper resistors and wires running to them from 15, 16, and 17 but is it necessary for me to move them to 14, 15, and 16 then?

Also, the diagram I've got is different from the FAQ, so which is correct?
Here's mine:

 

nobody?

 

Not me. I'm the wrong person on this.

B

 

I'll have to look up the S5 wiring, but at first glance, the NE and G wires don't look right, as you've got Ne+ hooked to a ground pin.

Ken

 

Hmmmm..... according to the FSM, that should be the pin for Ne+. What also worries me is that according to Aaron's site about grounding he says that in all series you should piggyback onto 3A and 3G, but once again; according to the s5 FSM it says that 3G is for G+ off of the CAS, and that 3A - 3D are grounds..... I'm confused.... thanks for the help though!

 

All the top pins( 1-19 ) on the MSv2.2 are "Grounds" unless you have found a way to reclaim them, can't use them for anything other then grounds.With that error* board and MSv2.2 you will need to add another connector on the MS case somewhere as the only "free" pins are #25-27-29-31 that have "through holes" on the MSv2.2 board. Three of these you probably want to use to wire the ignition outputs from the 3 LED's on the MSv2.2 board(see FAQ section). Pin 36 is unused also but you would have to solder directly on the DB37 connector pin underneath the MSv2.2 board to use it.

The "new" connector you add to the case ,(i.e. something like a DB-9,DB-15,etc.) would be used to wire in NE+,G+,G- that in-turn goes to the error* board LM1815 circuits i.e. "P5" in this case.

If you are using or making an adaptor to the stock S5 harness,note that NE- and G- are grounded together inside the harness before the ecu connector,i.e. Pin "3H". You would most likely wire "3H" to "G-" that is labled on "P5" and have nothing on "Ne-" on P5.Pin "3G" is G+, Pin "3E" is Ne+.

On the S5 ecu Pins "3A-3B" are the main grounds(i.e. ground those to pins 7-11 on the MSv2.2-or something along those lines since all the top row are grounds), Pin "3C" is the sensor ground(i.e. ground that to Pin 19 on the MSv2.2-away from the main grounds at least) ,Pin "3D" is labled as a "analog" ground and I have no clue what that grounds on the S5 ecu.
Hope that helps.

 

Sweet, thanks for spelling it out for me! I'll get all this done over the week and get back to you guys on how it all went. Thanks again!!!!

 

Ok, well i ran new grounds, re-wired everything correctly (95% sure) and I'm still getting no tach..... I've got ECU pin 1G (the trailing coil fire output) wired up to the MS as my tach input, should it be something else?

 

Pin#24 should be vacant on your MSv2.2 as the tach signal comes from the LM1815's on the error* board( i.e. Pin 19 and 20 on "P1"). The numbering on "P1" is confusing also as pin#2 in under Pin#1(square pad).So the top row pins are 1,3,5,7,etc... 19 and the bottom row is 2,4,6, etc.... 20 as that isn't documented anywhere on the sheet that comes with the error* board.

 

Alright, I'll check it out and see what happens...

 

I bought this board off a guy who already had it wired up and I think he has made some mistakes...

Looking at the pictures I have of P5 at the top, and how the CAS signals are running to it; are they backwards? Logic tells me that if P1 starts at the "top" with 1 then down to 20 then P5 would do the same, right? So then the wire needing to run to pin 1 is actually running to pin 8? I can't find any documentation on this anywhere....

The same question as well for wiring back to the MS board, am I correct that the "numbering" is opposite that of the Daughter Board, that it goes from "bottom" to "top"? Cuz if so, then the power to the error* board is wired incorrectly as well.

Thanks again for the help Griffin, I appreciate it!

 

"P5" looks correct the way you have it ,looking at the unbuilt board I have here. I'd check "P1" to make sure pins 19 and 20 are going to the correct places on the MS board. It's the only connector that is 2 row and different in numbering.

"P1" is orientated reading the silkscreen printing normally (i.e. P1 is on the bottom of the board and the extra map sensor spot "U6" is the bottom left)

19-17-15-13-11.......1
20-18-16..................2

pin 19(white) VR2 sensor goes to "U1 pin11" on the MSv2.2(the one with the 1K resistor in series)
pin 20(black) VR1 sensor goes to "U4 pin6" on the MSv2.2.

I'd check things over to make sure the wiring is correct otherwise you will be pulling your hair out in short order .

 

This is the only info on that board. Should help.

http://www.glensgarage.com/extra/

 

Cool, but what about JP-1 on the MS board?

Oriented with the silkscreen print, does it go:

top hole as 8 down to 1

or

top hole as 1 down to 8?


If these were backwards, then no power to extra board, and no tach / no trigger.... big bada boom.

 

Top hole Is JP1/pin1, the one beside the 3 empty ones labled "X8-X10".

 

Well I double checked everything, and it's all hooked up right. New grounds, DB9 connection for the CAS inputs, everything wired to the proper spots with proper resistors in place, and still no tach. Could it be a bad VR circuit on the extra board? How would I test for it?

 

I suppose it could have been overheated when soldered or zapped with static electricity, cold solder joint, solder bridge, amoung a host of other things. You'll need to get hold of a O-scope to test it.

You are going to have to adapt a troubleshooting stragedy,probably head over to the MS main site and do some reading etc. ,and ask more pointed/detailed(pics,etc.) questions to get some answers and help troubleshoot. Depending on your skill you may try to find someone close by with MS knowledge to help out or point you in the right direction.

 

Well thanks for the help you've provided, I really appreciate it! I'll let ya'll know if I can ever get it working.

 

Haha... I think I may have figured it out! I haven't tried it yet, but I'm almost positive that the wrong firmware is loaded up on there!!! Doh!! After reviewing the firmware sticky, I'm pretty sure that version 1.0.0 is loaded up, and since Im using that extra board I would need to load up 1.0.2, correct? That would prevent her from starting up now wouldn't it!