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Top 2GNT Technical Performance/Engine Engine Management Systems & Controllers topic #5424
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Subject: "Ms2 V3.0 420aa decoding" Previous topic | Next topic
DstachNov-20-11 09:49 AM
Member since Dec 04th 2010
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#5424, "Ms2 V3.0 420aa decoding"


          

I am buying my unit from diy and the only part that I really do not understand is the 420a crank decoding. I see the diagram here http://www.msextra.com/doc/ms2extra/MS2-Extra_Neon.htm but I just don't understand it. Can anyone clarify the diagram or help with what parts they are?

-----
99 Eclipse gs (Daily)
89 Honda Crx (Drag car project)

  

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Replies to this topic
RE: Ms2 V3.0 420aa decoding, VelocitaPaola, Nov-20-11 11:23 AM, #1
RE: Ms2 V3.0 420aa decoding, Dstach, Nov-20-11 11:24 AM, #2
      RE: Ms2 V3.0 420aa decoding, SymTech Labs, Nov-20-11 11:30 AM, #3
           RE: Ms2 V3.0 420aa decoding, Dstach, Nov-20-11 11:34 AM, #4
                RE: Ms2 V3.0 420aa decoding, Dstach, Nov-20-11 11:38 AM, #5
                     RE: Ms2 V3.0 420aa decoding, SymTech Labs, Nov-20-11 11:42 AM, #6
                          RE: Ms2 V3.0 420aa decoding, Dstach, Nov-20-11 11:47 AM, #7

VelocitaPaolaNov-20-11 11:23 AM
Member since Jun 13th 2005
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#5425, "RE: Ms2 V3.0 420aa decoding"
In response to Reply # 0


          

Originally posted by Dstach
I am buying my unit from diy and the only part that I really do not understand is the 420a crank decoding. I see the diagram here http://www.msextra.com/doc/ms2extra/MS2-Extra_Neon.htm but I just don't understand it. Can anyone clarify the diagram or help with what parts they are?

Are you assembling a kit yourself?

-----------------------------------------

-Paul

Service Manuals and Guides

  

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DstachNov-20-11 11:24 AM
Member since Dec 04th 2010
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#5426, "RE: Ms2 V3.0 420aa decoding"
In response to Reply # 1


          

yes I am. I just don't understand if I change something, add parts or what. Im just a little lost.

-----
99 Eclipse gs (Daily)
89 Honda Crx (Drag car project)

  

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SymTech LabsNov-20-11 11:30 AM
Member since Jun 29th 2009
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#5427, "RE: Ms2 V3.0 420aa decoding"
In response to Reply # 2




          

Originally posted by Dstach
yes I am. I just don't understand if I change something, add parts or what. Im just a little lost.

For the input, you will need a 330 ohm to 1.5k ohm resistor. You do not have to install D1, D2, or C30. You also do not have to install any component in the VR circuit:

http://www.msextra.com/doc/ms2extra/MS2-Extra_Ignition.htm#vr

-----------------------------------------

- http://www.symtechlabs.com -

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DstachNov-20-11 11:34 AM
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#5428, "RE: Ms2 V3.0 420aa decoding"
In response to Reply # 3


          

ok thank you very much!

-----
99 Eclipse gs (Daily)
89 Honda Crx (Drag car project)

  

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DstachNov-20-11 11:38 AM
Member since Dec 04th 2010
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#5429, "RE: Ms2 V3.0 420aa decoding"
In response to Reply # 4


          

small clarification. SO I can put the resistor inline with the signal wire going to MS. and when building the board just skip where is says for the vr/ hall sensor?

-----
99 Eclipse gs (Daily)
89 Honda Crx (Drag car project)

  

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SymTech LabsNov-20-11 11:42 AM
Member since Jun 29th 2009
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#5430, "RE: Ms2 V3.0 420aa decoding"
In response to Reply # 5




          

Originally posted by Dstach
small clarification. SO I can put the resistor inline with the signal wire going to MS. and when building the board just skip where is says for the vr/ hall sensor?

No, you need to build the Hall/opto circuit and configure it using the 330 ohm - 1.5k ohm resistor as shown in the schematic you posted. We use the standard 390 ohm resistor (R12) in our ECU's, but connect a 1k ohm resistor in series between the R12 and 5V/Vcc.

-----------------------------------------

- http://www.symtechlabs.com -

2GNT's Source for MegaSquirt
systems, accessories & more!


Service Manuals and Guides
MegaSquirt MSQ Repository

  

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DstachNov-20-11 11:47 AM
Member since Dec 04th 2010
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#5431, "RE: Ms2 V3.0 420aa decoding"
In response to Reply # 6


          

Ok I understand it now! Thank you very much! I appreciate it!

-----
99 Eclipse gs (Daily)
89 Honda Crx (Drag car project)

  

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