I measured voltage on the SAW wire today.
It's supposed to have +5v, right?
It's got 11-18 volts, wildly fluctuating, on it.
I'm taking my SAW signal off x11 (S1 on the relay board) and my v2.2 board mods are done to the letter per the megasquirt.sf.net docs. The SAW wire (#3 on the module), is seperate from all other wires in my EDIS pigtail. So ... bad module?
I may have pinned down my EDIS woes.
Moderators: jsmcortina, muythaibxr
-
- Experienced MS/Extra'er
- Posts: 327
- Joined: Sun Sep 12, 2004 4:41 pm
- Location: Somewhere in TN
-
- Site Admin
- Posts: 39585
- Joined: Mon May 03, 2004 1:34 am
- Location: Birmingham, UK
- Contact:
Which end are you measuring? The Megasquirt end or EDIS end?
James
James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
-
- Experienced MS/Extra'er
- Posts: 327
- Joined: Sun Sep 12, 2004 4:41 pm
- Location: Somewhere in TN
-
- Experienced MS/Extra'er
- Posts: 327
- Joined: Sun Sep 12, 2004 4:41 pm
- Location: Somewhere in TN
Ok.
Dad and I tested the board and found five bad diodes and four bad capacitors. The bad diodes are in the power, input, and output circuits (Yikes!) and the bad capicitors are in the DB9 output.
Time for a visit to Radio Shack.
I also tested the U5. When running, between the two outside legs there is 12.5v. Between the middle leg and the right (when U5 is at the top) there is fluctuating 11-20+ volts. Between the middle leg and the left, there is around 5.5v.
(I may be confused on the left and right. My MegSquirt is mounted in the car "upside down".)
Dad and I tested the board and found five bad diodes and four bad capacitors. The bad diodes are in the power, input, and output circuits (Yikes!) and the bad capicitors are in the DB9 output.
Time for a visit to Radio Shack.
I also tested the U5. When running, between the two outside legs there is 12.5v. Between the middle leg and the right (when U5 is at the top) there is fluctuating 11-20+ volts. Between the middle leg and the left, there is around 5.5v.
(I may be confused on the left and right. My MegSquirt is mounted in the car "upside down".)