Got a V3 card that have been running a MS1 cpu but decided to go to a MSII cpu now, made the needed mods and started it up on the stim, everything seems to work except it wont give any signal to the injector channels?
Went back to MS1 cpu, injector channels work as they should.
I've got a scope and I'll try to scope the pins on the MSII cpu and the nand gate, damn those things are tiny...
Anything in particular I shuld look for? Can it be a software related problem? I flashed it witht he latest code from msefi but it still is the same.
Test mode wont give me anything either.
The odds for both channels going dead at the same time don't seem too high or?
MS V3.0 with MSII, no injector pulses whatsoever
Forum rules
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
-
Per Eriksson
- MegaSquirt Newbie
- Posts: 5
- Joined: Thu May 06, 2004 11:00 am
- Location: Sweden
- Contact:
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Per Eriksson
- MegaSquirt Newbie
- Posts: 5
- Joined: Thu May 06, 2004 11:00 am
- Location: Sweden
- Contact:
Re: MS V3.0 with MSII, no injector pulses whatsoever
U1 socket cpu card removed power on,
21 5V
22 5V
39 0V
40 0V
Card inserted, stim running, megatune showing about 10msec PW,
21 pulses between 4.25 and 5V
22 pulses between 4.8 and 5V, you can barely see the same pattern as on pin 20.
39 pulses between 3.75 and 5V
40 same as above
74HC00
pin 14 5V
1 they basically all pulses between 4 and 5V according to the required PW but why wont they go all the way down to 0V?
2
3
4
5
6
21 5V
22 5V
39 0V
40 0V
Card inserted, stim running, megatune showing about 10msec PW,
21 pulses between 4.25 and 5V
22 pulses between 4.8 and 5V, you can barely see the same pattern as on pin 20.
39 pulses between 3.75 and 5V
40 same as above
74HC00
pin 14 5V
1 they basically all pulses between 4 and 5V according to the required PW but why wont they go all the way down to 0V?
2
3
4
5
6
-----
/Per
/Per
-
Per Eriksson
- MegaSquirt Newbie
- Posts: 5
- Joined: Thu May 06, 2004 11:00 am
- Location: Sweden
- Contact:
Re: MS V3.0 with MSII, no injector pulses whatsoever
Update, removed the HC7400 and checked signals from the cpu, they now drops all the way to 0 as they should.
I guess the hc74 are toast for some reason, a new one comes tomorrow and we'll see what happens when a fresh one is put in.
I guess the hc74 are toast for some reason, a new one comes tomorrow and we'll see what happens when a fresh one is put in.
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/Per
/Per
-
Per Eriksson
- MegaSquirt Newbie
- Posts: 5
- Joined: Thu May 06, 2004 11:00 am
- Location: Sweden
- Contact:
