No communication with Megasquirt ECU since checking wiring..

The forum to discuss:
- V2.2, V3 assembly,
- V2.2, V3 troubleshooting, and
- Connection troubleshooting
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.
Post Reply
smifee
MegaSquirt Newbie
Posts: 2
Joined: Sat Dec 24, 2011 7:37 am

No communication with Megasquirt ECU since checking wiring..

Post by smifee »

Got a few issues with my MegaSquirt
done all the checks on wiring loom and plugged in the ecu.. Turned it on and the middle LED ilumminated and the fuel pump primed up. the Led went out and the pump cut out i take it it has a prime function installed i then connected up my laptop and got comunication i then went threw the setup untill i got to the bit for the air temperature sensor where i noticed the reading was 1750 so i disconectted the sensor and it still had the same reading so turned off the ignition and re checked the resistance and wiring to which was ok..
I then replaced the wiring loom to the Ecu and reconected the laptop i turned on the ignition and all the same.. I then tried to regain comunnication and Nothing!! i've checked everthing and can't find nothing wrong but can't communicate with the Ecu so dont know what to try..

Also i noticed the map sensor reading was fluctuating with out the engine running?

Any ideas would be helpfull
What should i try or check??
smifee
MegaSquirt Newbie
Posts: 2
Joined: Sat Dec 24, 2011 7:37 am

Re: No communication with Megasquirt ECU since checking wiri

Post by smifee »

Been reading abit on this problem and think it could be a comunication fault with the hardware i'm using..
I've got a Medion Sim 2000 laptop.. System spec is

System
Microsoft Windows XP
Home Edition
Version 2002
Service Pack 3

Computer
Intel(R) Pentium(R) M
processor 1.50GHz
1.50 GHz 1.43GB of Ram

i have been tryin to use a pcmcia to twin serial port 9 pin connector rs232 from maplins..

Is this adequate to run megasquirt tuning software and communicate with the ecu ??

What ya think any ideas where i'm going wrong???
Matt Cramer
Super Squirter
Posts: 2951
Joined: Sat Jul 03, 2004 11:35 am

Re: No communication with Megasquirt ECU since checking wiri

Post by Matt Cramer »

Windows XP is fine; a lot of the tuning software can run on much cruder laptops.

What firmware do you have installed?
Post Reply