MTX-L Ground/12V Noise PSA

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05-06-2013, 03:56 PM

#21

WestfieldMX5

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ms power gnd (it goes to the throttle body).
I tried ms sensor gnd as well (black/blue), but that gave the exact same readings (not unexpected as they both go to the V3 board gnd points.

05-10-2013, 06:28 PM

#22

JasonC SBB

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Are the schematics and PCB layouts for the MS3x available?

05-10-2013, 06:56 PM

#23

WestfieldMX5

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Schematics are here Megasquirt 3 - V3.0 board schematics
Don't think the PCB layouts are available though

05-11-2013, 07:05 AM

#24

richyvrlimited

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Quote:

Originally Posted by WestfieldMX5

I installed ABS and COPS on my car a couple of weeks ago and in the process rewired my entire engine harness. I never had AFR noise before but I decided to rewire the MTX-L as well. I can't remember how it was connected before but I moved 12V and GND to the MS.

This was the result

10x zoom:

I'll be honest, that looks normal to me. Maybe I need to re-think my wiring strategy. I've always wired everything to appropriate sections on the MS sub harness.