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Weird megasquirt problems

 
Old 05-14-2019, 12:14 PM
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Default Weird megasquirt problems

Hey everybody i something strange going on. With communication from megasquirt to turner studio. While ecu is plugged into the cars harness. Itís a ms2 unit. When the ecu is unplugged from the car and plugged in to my external 12v power source it will connect to tunerstudio no problem. When I plug the ecu into the cars harness and key on I get nothing thought maybe it was the battery took the battery to work charged it on a gr8 charging system that took diagnostics of it as well. Everythingís good plug it back in still nothing. One thing that is also strange is when the key is plugged in to the car and I plug the 12v power source in. With key off or on it will communicate but I have a weird clicking noise coming from under the dash.goes away ones I unplug the external power source. The cars a 1.6 it worked perfectly I swapped to a different 1.6 motor and now Iím having problems connecting. Also I updated firmware last night when I couldnít connect at all to tunerstudio. If anybody has any idea whatís going on please let me know thank you
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Old 05-14-2019, 12:29 PM
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Check power at the ECU connector,
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Old 05-14-2019, 12:31 PM
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Originally Posted by acedeuce802 View Post
Check power at the ECU connector,
Iím gonna check after I get out of work. Assuming this should have close to 12v at the pin
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Old 05-14-2019, 12:41 PM
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Assuming everything on the inside of the Megasquirt is still good (which you confirmed by plugging the 12V AC power adapter back in and it communicated), then that's the issue. All you need to communicate with it is power and ground. If you confirm that you don't have 12V on the proper pin (look up wiring diagram or ECU pinout to figure out which one), then check fuses, relays, and grounds.
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Old 05-14-2019, 12:45 PM
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Ill try and find a diagram of the 12v lead once Iím home hopefully itís something simple. Everything else seems to turn on as it should. It also turns over. Just fine
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Old 05-14-2019, 06:30 PM
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Originally Posted by acedeuce802 View Post
Assuming everything on the inside of the Megasquirt is still good (which you confirmed by plugging the 12V AC power adapter back in and it communicated), then that's the issue. All you need to communicate with it is power and ground. If you confirm that you don't have 12V on the proper pin (look up wiring diagram or ECU pinout to figure out which one), then check fuses, relays, and grounds.
Okay out of work checked the white/red wire at the ecu connector. No power at all. Also just realized my fuel pump is not turning on with the key. Pulled the fuel injector relay. And jumped the right pins. Fuel pump turns on I have power at the pin and it connects to tunerstudio. The relay is clicking when I put it in but nothing happens. Is there a corresponding ground or another relay/fuse by chance
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Old 05-15-2019, 03:13 AM
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What year car?
Has the MS ever worked in your car?
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Old 05-15-2019, 07:43 AM
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Originally Posted by WestfieldMX5 View Post
What year car?
Has the MS ever worked in your car?
Yeah the car was running before I put in a new 1.6. I actually figured the problem out. I removed the air bag fuses from the block under the hood. Since I have removed all air bag components. I put them back in for the hell of it and everything is back to normal now.
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