O2 and VR sensor MS 2 v3.0

[jimpapastathopoylos]

Hello. I have read all the manuals but i cant understand two things about O2 sensor and vr sensor. First about O2. In some diagrams I see o2 sensors with four wires ( http://www.DIYAutoTune.com/images/mshar ... wiring.png ) and some others with tree wires ( http://invisiblesun.org/blog/wp-content ... wiring.jpg. ) I have o2 sensor with three wires (two white and one black ). Also when I read diagrams with edis ( i will use edis4) ( http://invisiblesun.org/blog/wp-content ... wiring.jpg ) I see only one VR sensor which goes to edis. When i use edis i need only one vr sensor ? Then how does my injectors work? See (http://www.DIYAutoTune.com/images/mshar ... wiring.png ) i have vr sensor directly fit to the ecu in this diagram. Sorry for all them questions. If there is any manual which answers to my question please tell me. Jim

[Bernard Fife]

Jim,

See:

02: http://www.megamanual.com/v22manual/mwire.htm#ego
EDIS: http://www.megamanual.com/ms2/EDIS.htm

The links explicitly answer both your questions.

Links to the full manual are here: http://www.megamanual.com/mtabcon.htm

Lance.

[DonTZ125]

The EDIS receives the VR signal, processes it and sends a square-wave RPM signal to the MS (PIP); the MS sends an RPM-based spark timing correction signal to the EDIS (SAW); the EDIS fires the coils and the MS fires the injectors. There are only 2 wires going between the EDIS and MS, PIP and SAW; beyond that, each is self-contained. Take a look at the MegaManual page.

Narrow-band O2 sensors can be 1, 2, 3, or 4-wire, and each must be wired according to its own requirements. Wide-band sensors are 6-wire, and must be connected to a controller; WBO2 sensors cannot be wired directly to the MS.

[jimpapastathopoylos]

Thank you Lance and Don. Sorry for that post I think i have a lot of reading

[jimpapastathopoylos]

I read this. http://msextra.com/doc/general/tachin-v30.html#vrlogic And it says :

V3.0 board - VR Input for logic input e.g. TFI, EDIS, GMDIS, LS1/24X, modules
a) Solder a link between VRIN and TACHSELECT
b) Solder a wire between VrOUT and TSEL
c) With a small screwdriver, turn the pots, R52 and R56, about 12 turns anticlockwise (sometimes you may feel a "click" when the end position is reached, they can't be damaged by turning too far.)
d) Turn R56 back about 6 turns clockwise.

What does he mean turn the pots ? R52 and R56 are resistors :/ Am i right? OR they are " special " resistors? Thienks. jim

[kjones6039]

What does he mean turn the pots ? R52 and R56 are resistors :/ Am i right? OR they are " special " resistors? Thienks. jim

Potentiometers (POTS) are variable resistors.

Ken

[jimpapastathopoylos]

Thank you Kjones. I dont have Ms bought yet so there are some things i cant understand yet. I'm purchasing ms next monday