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#856
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Re: Memory dump of ECU
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I've only just seen this. I assume from your other thread that you've got all this figured out now? I can see dozens of different maps in the ECU, the difficulty is in knowing what they represent.
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Subaru ECU and TCU Website 1992 Alcyone SVX Version L 1992 Alcyone SVX Version L 1994 Alcyone SVX S40-II 2004 Subaru Legacy 2.5 SE Sports Tourer 1996 Subaru Legacy 2.2 GX Wagon 1988 Subaru Justy J12 SL-II |
#857
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Re: Memory dump of ECU
It uses a formula for voltage correction of the latency value so there is no table.
The starting fuel methodology will be different than for the nemisis as well so the starting pulse width, idle enrichment, and cold idle enrichment tables wouldn't be much use either. The right way to do it for that system is to get the injector latency measured at all those voltages with the correct fuel pressure to be used. That's one of the advanced services at rc engineering. |
#858
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Re: Memory dump of ECU
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This should help explain the eavesdropping: http://www.alcyone.org.uk/ssm/eavesdrop.html The idea is that you connect the eavesdrop cable in between your car and the Subaru dealer's Select Monitor tool. Then you can use your PC to listen to the communication between the Select Monitor and the car. For each parameter, you can see which address the select monitor is querying. That's half the problem solved. The other half of the problem is to figure out how to map the value that comes back from the ECU to the value that gets displayed on the select monitor screen. Most likely it will be a linear relationship. That means the equation will be y=mx+c. y is the select monitor value, x is the raw data, m is a multiplier and c is a constant. The values of m and c can be worked out by taking two readings and using "simultaneous equations". You need to get the female connectors from a car breaker. I haven't found another source. If you can find a breaker with a 1st Gen Legacy then you are in luck because you can pull it's diagnostics connector and it's radio connector. They are the same. It's not difficult to do. I'll be happy to take you through it step by step.
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Subaru ECU and TCU Website 1992 Alcyone SVX Version L 1992 Alcyone SVX Version L 1994 Alcyone SVX S40-II 2004 Subaru Legacy 2.5 SE Sports Tourer 1996 Subaru Legacy 2.2 GX Wagon 1988 Subaru Justy J12 SL-II |
#859
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Re: Memory dump of ECU
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You are right, thats why I am still in the market for an adjustable voltage DC power source. This way I can actually find the injector response times... I spent a long time writing the cold start fuel maps and cranking enrichment maps. They are actually very good the way I have written them. But the bad part is, I will likely need to do them all over again after I get the correct response times for the injectors... Thing is, regardless of close they may be, it is going to vary slightly from car to car due to age of the wiring harnesses and how much resistance they have lost or gained over the years. So it will need to be done for every car if you want it to be that precise. It really only needs to be done if one was to run VE mode in the Nemesis. VE mode doesn't really gain you anything excpet the ability to change injectors w/ the entry of a new flow rate into the system. But all thing considered... tuning in ms is much better IMHO Tom |
#860
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Re: Memory dump of ECU
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Tom |
#861
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Re: Memory dump of ECU
a 47 cent trim pot connected to the battery being used to drive the system is an adjustable voltage dc power source.
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#862
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Re: Memory dump of ECU
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Tom |
#863
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Re: Memory dump of ECU
two batteries connected in series makes 24 volts for the circuit you want the 15v on and you can still wire everything else connected to just the 1 battery for 12v. Two batteries will last better for your test anyway.
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#864
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Re: Memory dump of ECU
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Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#865
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Re: Memory dump of ECU
that's true it would be better to have the same voltage with and without load. how many amps do the injector coils draw?
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#866
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Re: Memory dump of ECU
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Harvey.
__________________
One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#867
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Re: Memory dump of ECU
an lm338 is 5 amps i would think that would be plenty and you could just hook up a pot to control it
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#868
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Re: Memory dump of ECU
well if it's only an amp then an lm317 would be enough
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#869
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Re: Memory dump of ECU
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Harvey.
__________________
One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#870
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Re: Memory dump of ECU
I would use the bigger one as it would be 1.25amps at 15V.
Harvey.
__________________
One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
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