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07-14-2005, 10:21 AM | #1 |
Scooby Newbie
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2002 coil pin out
I am working on a megasquirt ECU for a sandrail. I need to know what the the four connector pins on the coil are for and does this coil have built in igniters?
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07-14-2005, 01:19 PM | #2 |
Scooby Newbie
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The numbers on the coil pack are:
22433AA410 Diamond FH0137 9Z28 |
07-15-2005, 12:56 PM | #3 |
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I wonder why this was moved to Service and Maintence? It is not that type of question. If I get an answer I quess it does not really matter. Some one must have the wire diagram for a 2002 Impresa coil pack.
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07-15-2005, 02:14 PM | #4 |
Miss You Mom
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07-15-2005, 04:14 PM | #5 |
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Brain
The coil pack I am refering to has four pins inside the built in connector and no wires. Other Subaru coil packs I have from EJ22 engines have a three wire connector. Would you know what each pin in the connector is for. Don |
07-15-2005, 05:03 PM | #6 |
Miss You Mom
Oct 1940 - Feb 2008 Super Moderator Member#: 809
Join Date: Jan 2000
Chapter/Region:
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Vehicle:2000 2.5 RS, '14 For 92 5MT SVX |
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07-15-2005, 05:10 PM | #7 |
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Brian
Thanks maybe some will know. I was told this coilpack may have built-in igniters. If that is true then i can drive it directly with my Megasquirt ECU but I need to know what needs to be hooked up to each pin in the coil. Don |
07-22-2005, 03:35 PM | #8 |
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It does have an integrated ignitor. If you look into the connector on the coil, the pins are numbered thusly:
Code:
___|.|___ | 4 3 2 1 | -|_________|- Pin 2 is +12v Pin 3 is ground Pin 4 is the trigger for ignition channel 2 I'm pretty confident this is correct, but if you'd care to double-check that, Brian, that'd be good. |
07-22-2005, 03:47 PM | #9 |
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Thanks vrg3
That is what I thought it would be if it had built in igniters. Now I have to build a VR conditioning circuit for the Megasquirt. Don |
07-22-2005, 03:49 PM | #10 |
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You mean to interface the stock cam/crank angle sensors to MegaSquirt?
I didn't know MS could do Subaru cam/crank decoding. But I guess my knowledge is outdated. Can you just use a couple of HEI modules? |
07-22-2005, 04:17 PM | #11 |
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A few months ago new code was writen for MS. It is refered to as extra. I think it may be able to input two VR sensors but the guys I have talking to are just using the crank sensor. A freind has two EJ20T engines in sand rails running on MS-EDIS. I have the EDIS 36-1 wheel mounted on a EJ20 now but I am missing a few parts to get it running for awhile. MS could be setup using a 4-1 wheel. That would require removing three of the six teeth on the crank sensor timing belt pulley(not sure which three yet). Putting the output of the crank VR sensor through a conditioner to convert its sine wave into a square wave that MS can handle. There are simple mods to be made on the MS pc board to get it have two ignition outputs. You could drive a coil pack with built in igniters or use igniters to drive one with out them. Now would be a good time to get into MS. They have came out with a new V3 board just last week. It has a VR conditioner built in and can drive coils directly. I have a V2.2 and have to deal with it before upgrading.
Don |
07-22-2005, 04:33 PM | #12 |
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Last I heard MSnS-extra had experimental code to decode Dodge Neon crank triggers but that was it. And like you say, it was just a single pickup, not two.
It can use a 4-1 wheel? Are you sure it wouldn't actually need 4 teeth (one for each cylinder)? In either case, there aren't four (or four minus one) evenly-spaced teeth on the cam sensor, so I'm not sure you could get away with just removing some teeth. I think an HEI module ought to be able to give you that square wave, at least from the crank sensor. If you already have the EDIS wheel, maybe you could cut teeth off that to get the kind of signal you want. |
07-22-2005, 04:43 PM | #13 |
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In a wasted spark system you would only need two imputs per rpm to trigger a spark. In a 4-1 (four minus one). the third tooth would only be needed to reset MS to fire #1 on the next pulse. I think you are right the HEI will condition the VR sensor.
Don |
07-22-2005, 05:48 PM | #14 |
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To better explain this. There are four combustions in 720 degrees of crankshaft rotation. Each combustion is 180 degrees apart, therefore we need two teeth 180 degrees apart to imput a pulse to ECU. In a wasted spark all plugs are fired once per revolition. If there were four evenly spaced it would be enough pulses to run a V8. You would also need a pulse to reset the ECU to let it know when #1 plug(and its companion) needs to be fired. So the min teeth to run a v8 in a wasted spark mode would be 4+1. Subaru 4-1 or 2+1 which every way you want to look at it.
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03-28-2020, 01:18 AM | #15 |
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Join Date: Jun 2018
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Coil wiring diagram
I know this is an old thread, but I am searching for this exact info. I an installing a Haltec Elite 1000 ecu in my sandcar. 2003 Subaru Outback 2.5 sohc motor. Single coil, 4 wires. I was sure the 1st pin(towards front of motor) was input for front 2 cylinders, and 4th pin(towards rear of motor) was input for back 2 cylinders. I am not sure which of the 2 middle wires was 12v, and which was ground(and where the ground wire should be grounded to: the battery, chassis, ecu??) Is the example listed in this thread, with the pins numbered, looking into the coil or the harness plug? I have an aftermarket ecu and bought connector, so plug-in wire colors don't mean anything to me. Thanks for any info given.
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