Finally got a MS3x - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 10-04-2014, 08:29 PM   #41
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Still nothing.
whinin is offline   Reply With Quote
Old 10-04-2014, 08:30 PM   #42
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

Pin 28 is power from the harness. That's a problem
aidandj is offline   Reply With Quote
Old 10-04-2014, 08:35 PM   #43
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

I have power from the harness though. I check with it unplugged key on and had 12v. Red/White wire factory harness.
whinin is offline   Reply With Quote
Old 10-04-2014, 08:37 PM   #44
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

OK so how about between pin 28 and pin 8. Make sure you are checking the correct pin. This is on the blue main board.
aidandj is offline   Reply With Quote
Old 10-04-2014, 08:41 PM   #45
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

We talking about the 40 pin connector we have been testing up to this point right?
whinin is offline   Reply With Quote
Old 10-04-2014, 08:42 PM   #46
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

No sorry. This is the db37 connector on the blue main board. The one the harness plugs into.
aidandj is offline   Reply With Quote
Old 10-04-2014, 08:43 PM   #47
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Diagram of which pin is which?
whinin is offline   Reply With Quote
Old 10-04-2014, 08:48 PM   #48
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

http://msextra.com/doc/ms3/General_Pix/v3-wiring.png
aidandj is offline   Reply With Quote
Old 10-04-2014, 09:07 PM   #49
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Took the bottom off and counted the pins over, still nothing.
whinin is offline   Reply With Quote
Old 10-04-2014, 09:40 PM   #50
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Connector not making contact I'm guessing?
whinin is offline   Reply With Quote
Old 10-04-2014, 11:02 PM   #51
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

Set your multimeter to ohms and check the connection from the harness pin for power and the pin on the db37 connector
aidandj is offline   Reply With Quote
Old 10-04-2014, 11:39 PM   #52
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

It shows continuity.
whinin is offline   Reply With Quote
Old 10-05-2014, 12:02 AM   #53
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Messing around with the multimeter, probing the power pin on the db37 connector. Other end poking around, I'm finding a lot of them show 60.7 on the 200k setting. The middle foot shows 60.7 on u5 and the right foot shows 61.5.

Port 32 shows 60.7 and port 31 shows 61.5
Port 1 shows 61.5 and port 2 shows 60.7
Port 19 shows 60.7 and port 20 shows 61.5

This is all from the power pin.

A ground pin shows continuity to everything I just said.
whinin is offline   Reply With Quote
Old 10-05-2014, 12:13 AM   #54
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Probing the connector end again on the db37. Power pin on one, every single one besides 3, 4, 5, 6 on the top row show 60.9.

20 and 21 show 64.1.
24 shows 62.6
26 shows 61.7
All else show open.
whinin is offline   Reply With Quote
Old 10-05-2014, 12:54 AM   #55
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

Quote:
Originally Posted by whinin View Post
Messing around with the multimeter, probing the power pin on the db37 connector. Other end poking around, I'm finding a lot of them show 60.7 on the 200k setting. The middle foot shows 60.7 on u5 and the right foot shows 61.5.

Port 32 shows 60.7 and port 31 shows 61.5
Port 1 shows 61.5 and port 2 shows 60.7
Port 19 shows 60.7 and port 20 shows 61.5

This is all from the power pin.

A ground pin shows continuity to everything I just said.
**** man I'm stumped. The way to figure out what is wrong is to trace to where the voltage stops. So we would start at the harness connector and find 12 volts then check each connection after that until we don't find 12 volts. The 3 easy connections are. At the harness connector, then at pin 28, then at u5 on the right pin. So if we have 12 volts at the harness. Then not 12 volts at the db37 connector the problem has to be between the harness connector and the db37. If you had access to a power supply we could try connecting it directly to the MS3, I'm pretty sure you can use a 9v battery to do the tests in step 24 from the build manual above. I would try connecting a 9v battery to power and ground on the harness connector and tell me if you what voltages you get at pin 28. Right and left legs of u5. and the pins on the 40 pin cpu connector. All these should be tested against ground. either pin 2, 8, or the ground in the proto area.
aidandj is offline   Reply With Quote
Old 10-05-2014, 01:18 AM   #56
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Those readings were on the 200k OHM setting. Was just messing around checking resistances and such. But if my power pin on the db37 connector shows a resistance of 61.5 on the right leg of the u5 then something isn't right since it needs 12v?
whinin is offline   Reply With Quote
Old 10-05-2014, 01:22 AM   #57
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

Missed that. So the right leg of u5 has continuity with the middle pin? If so you have a short. At this point I would pm Braineack and email DIYAutoTune. They will be able to help you diagnose what is blown/shorted. Update this thread if you figure it out. I'm interested. I don't know the board well enough to diagnose more over the internet and mine is put away in my car. But those guys should be able to help.
aidandj is offline   Reply With Quote
Old 10-05-2014, 01:28 AM   #58
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Yeah, the right leg of u5 shows continuity to the power pin 28. So does the middle leg. So does those 3 sets of 0v and 5v pins on the 40pin cpu connector. But it doesn't show a clear path, IE 0.00. It reads 60.7 and 61.5.
whinin is offline   Reply With Quote
Old 10-05-2014, 01:29 AM   #59
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

What is the resistance between the right and middle leg of u5
aidandj is offline   Reply With Quote
Old 10-05-2014, 01:30 AM   #60
Junior Member
Thread Starter
 
Join Date: Apr 2013
Location: Elgin, SC
Posts: 359
Total Cats: -4
Default

Just sucks I got it this way. I'm sure it can be fixed but I wanted to have the car running by now...
whinin is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Toxikk Girz0r Gaming 23 01-18-2017 01:02 PM
An Old Driver but a newbie in Miata Patriarca Meet and Greet 17 10-13-2015 02:34 PM
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM
The "other" spool question stefanst DIY Turbo Discussion 44 09-28-2015 08:16 PM
ME221 Now has Autotune and Long Term Fuel Trim Tables Motorsport-Electronics ECUs and Tuning 0 09-05-2015 09:02 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:22 AM.