Making my own ALDL cable for TunerPro -- which of these 2 schematics?
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Making my own ALDL cable for TunerPro -- which of these 2 schematics?
Hi guys, I am ordering some EEproms, adapters/sockets, and a programmer from moates.net tomorrow. I am also going to purchase TunerPro RT to use as both my bin editor and ALDL program. I would like to make my own cable to use for ALDL. I have found two different ALDL cable schematics -- moates.net has both listed.
I'm assuming that I'm using the top (ALDL to serial) schematic, which is originally from WinALDL's website. Will this cable work fine with TunerPro RT? I know WinALDL only runs at 160 baud, so I just wanted to verify if the cable WinALDL has spec'd out will run at the higher bitrate transfer that TunerPro RT will support. Also, will I need the 3k resistor between pins A and B to datalog with my 1987 PCM (165)? If so, this means I won't have knock counts output to the ALDL, right? Hopefully I don't need this resistor.
I'm assuming that I'm using the top (ALDL to serial) schematic, which is originally from WinALDL's website. Will this cable work fine with TunerPro RT? I know WinALDL only runs at 160 baud, so I just wanted to verify if the cable WinALDL has spec'd out will run at the higher bitrate transfer that TunerPro RT will support. Also, will I need the 3k resistor between pins A and B to datalog with my 1987 PCM (165)? If so, this means I won't have knock counts output to the ALDL, right? Hopefully I don't need this resistor.
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I've used the two trans style for several cables, and have used it with TunerPro and other scanning software. Bob
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I used the single transistor circuit with a '747 ecu (C3 type, 160 baud ALDL) but it did not work on a '749 (P4 type, 8192 baud ALDL). I'm using the 2-transistor version now with a 749 ECU. I've used the 2-transisor cable with TunerPro, Freescan, and TTS DataMaster scanning sofware. Brent
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Which 2 transistor model are you guys using? There are two diagrams listed here that use 2 transistors -- one labeled "Simple ALDL - lotus esprit" and the other one below it. I picked up all the parts I need from Radio shack and am ready to put a cable together for the princely sum of $8
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Originally posted by 327_TPI_77_Maro
Which 2 transistor model are you guys using? There are two diagrams listed here that use 2 transistors -- one labeled "Simple ALDL - lotus esprit" and the other one below it. I picked up all the parts I need from Radio shack and am ready to put a cable together for the princely sum of $8
Which 2 transistor model are you guys using? There are two diagrams listed here that use 2 transistors -- one labeled "Simple ALDL - lotus esprit" and the other one below it. I picked up all the parts I need from Radio shack and am ready to put a cable together for the princely sum of $8
I chose to hardwire my aldl cable into the vehicle. Then I just connect the laptop to it with a 9-pin male to female straight thru cable.
Brent
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Originally posted by 327_TPI_77_Maro
Brent, thanks. I'm working with a 165 ECU. Should the same model you used for the ALDL cable work with the 8192 baud 165?
Brent, thanks. I'm working with a 165 ECU. Should the same model you used for the ALDL cable work with the 8192 baud 165?
Brent
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Thanks again for the quick response Brent. Did you have to use a 3k resistor jumped across A and B on your diagnostic port in order to get the ecu into "ALDL mode", where it will have a high idle and no knock retard, or did you have no problems receiving data without the 3k resistor?
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It's not needed on either the 747 or 749. Not too sure about the 165 but it might need a 10k across A&B, maybe just to connect. There's a discussion about it here https://www.thirdgen.org/techbb2/sho...l+165+resistor
You might need to search for more info on this as I really have no experience with a 165 ecu.
Brent
You might need to search for more info on this as I really have no experience with a 165 ecu.
Brent
Last edited by 89C2500; 01-22-2005 at 03:14 PM.
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Brent, did you tie all of the grounds in the circuit to the same ground that comes off the diagnostic port, or did you actually send these to a common chassis ground?
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Update, I used the Lotus Esprit 2 transistor diagram to make my ALDL. Total cost was around $8. The cable works -- I haven't been able to test it at higher baud because of my 32b mask, but at 160 baud it works properly. Thanks everyone for putting up with my stupid questions!
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Congrats! This diy stuff is fun, eh?
I guess you got the grounds figured out. Now all the real fun begins!
Brent
I guess you got the grounds figured out. Now all the real fun begins!
Brent
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This diy-efi stuff is quickly becoming absolutely addictive. You should have seen the **** eating grin on my face when I got the ALDL working and my camaro was sitting their with its cammy idle, with a computer displaying data from all the sensors on my 1969 engine. I don't know that I can ever let a carb be "close enough" again!
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aldl cable grounds
you never specified wether the grounds go to the chassis or not in the circuit.
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Grounds are grounds. Chassis grounds, electrical system grounds, all are grounds. In this case it is most convenient to tie the grounds in the diagram into the ALDL port ground.
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Ive built and tested the Lotus Espirit one on a 165, 7730 and a tbi S-10 and seems to work great.
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aldl cable
very cool. thanx for being specific as i have tried many times to get multiple different circuits to work and haven't had any luck. i found out after making them all that you need to turn off the infrared port ont he laptop and have just started making them againt o try and the first one i am doing is the lotus espirt one so i hope it works. i am using the aldl ground and will test tomorrow haven't finished the circuit yet cuz i dont have a diode. so i will let you guys know.
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