I have a v3 board MS 2 and I am getting a very low voltage, .10, in Megatune. Just finished installing MAP( through step 55). All of my POTs are working correctly on the stim but I have the low voltage warning light. Baro is correct. The voltage on U5 is reading 12 on the closest to Db9 and 5 on furthest and I am getting less that 1ohm on the middle pin.
Also, I have verified that both my processor and configurator are set for 2.821( or whatever the newest edition ini is, they are the same).
Everything is going smoothly, I am just concerned about the low voltage. Any help would be appreciated.
Thanks,
Lee
.10 low voltage in Megatune
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.
-
1gturborex
- MegaSquirt Newbie
- Posts: 6
- Joined: Tue Dec 21, 2010 8:05 am
-
Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: .10 low voltage in Megatune
Check the voltage across the main board H1 (boot) header - it should be 1/6 the battery voltage. This circuit is used for measuring the voltage. Let me know what you find.
-
1gturborex
- MegaSquirt Newbie
- Posts: 6
- Joined: Tue Dec 21, 2010 8:05 am
Re: .10 low voltage in Megatune
I am getting .1 mV, very low. I should be checking this without the processor installed correct?
Also the voltage on U5 pin closest to Db9 is reading 11.95( I am using a wall plug to power the stim (V2.21), not a battery).
Thanks for the reply,
Lee
Also the voltage on U5 pin closest to Db9 is reading 11.95( I am using a wall plug to power the stim (V2.21), not a battery).
Thanks for the reply,
Lee
-
Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: .10 low voltage in Megatune
Doesn't matter if the processor is in there or not - at least not when things are working correctly. Having the processor out rules out a shorted out processor.
Check R3 and R6 to make sure they're within spec.
Check R3 and R6 to make sure they're within spec.
-
1gturborex
- MegaSquirt Newbie
- Posts: 6
- Joined: Tue Dec 21, 2010 8:05 am
Re: .10 low voltage in Megatune
Yep R3 was missing 
MegaSquirt is now complete, thank you very much. Now time to do some wiring!!!
-Lee
MegaSquirt is now complete, thank you very much. Now time to do some wiring!!!-Lee