Wollen wir das ev. hier diskutieren ?Alex71 hat geschrieben:Hallo,ich bin auch fertig mit meiner ersten Mini-MS.Womit ich nicht ganz klar komme, ist die Brücke von XG2 zu XG1 könnte mir jemand darüber was sagen?
http://www.megasquirt.de/msforum/viewto ... f=1&t=1084
Der XG1-XG2-Jumper legt die linke Seite des 4N25 Inputs gegen Ground.
Siehe http://www.bgsoflex.com/v22/megasquirt_ShemV2.2.pdf, Page 2, Unten Links
Zitat aus dem Mega-Manual (http://www.megamanual.com/v22manual/mass.htm ):
54. Now, it is choice time again, this time regarding the opto-isolator installed at U4. The LED inside of the opto-isolator is fired by a signal provided by the ignition system. The pulses existing on an ignition, especially when pulled directly off of the coil primary, can spike to very high voltages. The return path of the LED is terminated to jumper pad XG1. This return path can either go directly to the board ground (by placing a jumper from XG1 to XG2), or, the return can be brought out of one of the jumper slots on the DB-37 connector (like X11), and then grounded with a separate wire on the DB-37 connector, thus isolating the ground. Note: for the ECU to work on the stimulator, then the XG1 terminal needs to be hooked to XG2, and right now we are doing stimulator testing, so install a jumper from XG1 to XG2. Now, when you install the ECU, if you need isolation because the tach signal is resetting the ECU (for those installs tapping right off of the ignition coil (-) terminal), then you can remove this jumper and connect XG1 to X11, and ground this pin (#25 for X11) with a separate return wire. Note: if you are using a tach output from an aftermarket or many OEM setups, the tach signal is a nice +12V pulse - these will work fine with the XG1 terminal jumpered to XG2 in the install. Again: for testing right with the stimulator, hook XG1 to XG2. Later, after you install this on your vehicle, if you have reset problems, then remove this jumper and jumper XG1 to X11, and bring out a separate return ground wire.
Note: Do not mistake XG1 and XG2 for X1or X2. XG1 and XG2 are near R10.
Some installations have reported problems with low rpm “spikes”. Typically this sees the reported rpm at 1100 rpm jump to 5000+ rpm for short periods. This can make idle and off-idle tuning difficult. To fix this, install the “Dave” capacitor. This is a 0.22µF, cap across the junction of D5/R10 to XG1. (See the ignition triggering section of the Sensor and Wiring section of this manual for details).
die scheinen aktuell wieder unfähig zu sein. könntest mir mal die nummer zuschicken? 14stellig.
