I am having problems trying to get datamaster or tunerproRT to work. Basically they will not connect.

My Motes software works fine. (most of the time, if it doesn't freeze occasionally)

Could this be a result of me using a 2 transistor aldl setup instead of a Max232?

My com port settings are 9600 8bit. Using win 98se.

Any ideas?

 

Nope.... The 2 trans works fine with TunerPro. May want to check your setting in TP, in preferences IIRC for the correct com port. Bob

 

It took me a couple shots till I figured I had the wrong com port on my notebook. Make sure you have some kind of way to tell which com port is correct and not another one with a modem possibly. I used the 2 transistor on a map and maf system so to be sure it worked well and it did. I think I paid maybe $3-4 in total to build it since i had a db9 connector laying around. I havent yet used it on my 7730 but im sure it will work fine.

 

I use the max232 adapter, and I have the same problem. From what I gather, it's a problem with the ALDL of the 165 ECM itself.

I am soldered directly into the wires behind the ALDL connector, and all my connections in the component box are soldered perfectly and sealed it up solid with electrical tape. I'm going to be doing the SD 808 conversion here sometime soon, so I can let you know if the problem goes away with that.

EDIT: just noticed you have a 90, so you're probably running MAP. Not sure about that one. I did try and use my two transistor adaptor for my old TBI camaro on my dads old 91 SD TPI WS6, and I could not get it to connect. Worked flawless on my TBI though.

 

I only have one com port and I disabled my infared port in the bios. No modem. I have checked all of my settings a bunch of times in tunerpro and datamaster. What gets me is that motes works and the others dont.??? I'll triple check onece more?

 

While were on this topic, my single transistor cable that worked on my 6870 doesnt seem to work on my 165 since the swap. I heard I need a two transistor for the higher baud, but shouldnt the old cable still work at the slower rate (with WinALDL)?

Has anyone got some good two transistor diagram links? It seems they were all surpassed by the max232.

 

The MAX232 type of cable is a much better setup, and when you can order samples for free from Maxim's website, why bother with the 2 transistor stuff?

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1798

I actually use the MAX233 or 233A because it doesn't require any external capacitors (other than the one from power to ground).

I'm not sure if there are any schematics for the ALDL circuit with the 233, if not I can make one and post it.

 

here is the 2tran i used, the one that is working with the motes software

the difference than the diagram is on the car side. I used the equivalent of M for data but directly from the output pin at the ecm and power and ground directly from the ecm, not at the aldl connector.

 

NovaSS, is the 1N4148 a diode??

Alex, I went to their site and saw the sample thing, it directs you to be a member and input info. Did you say you were with a company? Could you post your 233 schematic too? Or just email it to me please at SBNova@Yahoo.com Thanks

 

I got my 2 transistor homemade cable to work fine on a 165. The 165 I think is one of the few ecms that requires the 10k ohm resistor jumped between the diagnostic wire and ground since this is how i ran it and got data. BTW I ran the above schematic flawlesly. Make sure you get all the correct components in the right direction when you build it and have a 12 volt source. I used an ohmeter to make sure every compnent was working perfectly previously to soldering it and also helped in making sure I was assembling it correctly.

 

Yes, basic diode

 

here is a schematic, this is the one on moates.net

 

Well, after getting their sample I might decide to start a cable making company. I bet I could sell about 5000/year. <grin>

But seriously, these chips cost them almost nothing and they like having the buzz among the hobbyist types. So go for it.

 

I have free samples of the

MAX232A
MAX232
MAX233A
MAX233

really simple just register with them

 

In the two transistor schematic- are any of the shown 10k resistors the ones used for engaging diagnostic mode?? I would like to put in a switch to turn it off (like someone in another recent post suggested), but I dont know which 10k to switch, or if I have to add yet another 10k at the ALDL. Thanks

 

no i dont believe so.

 

yes you do. The 10k is in between Pin A + B on the ALDL port for the '165 ecu. I set mine up with a switch as well, just make sure when it's off it's no completing the 10 k resistor circuit to B

 

Got mine today, cool!

 

ok can somebody show me in this picture where there is a 10K that I would need a switch on to turn on and off ALDL mode for the connction. Some one in a eairler post said the 10k resistor between A & B on the ALDL . I don't see a resistor on A&B connection.

And yes I realize that it is a different ALDL on a Espirt so If someone would be kind enough to save the picture and Modify the Letters on the ALDL and then circle the resistor that would need to be switched on and off I would grately appricate it.

 

Here is the schematic showing where the 10k goes...remember it doesn't need to be inserted after the aldl data starts flowing so a switch opening the circuit before B will allow you to simply turn it off/on at will.

 

ah so actually I need to add another 10 resistor

 

it all depends on how many you have! But you need 1 more than in the original schematic.

 

so actually you could use a cigerate lighter plug for power and Ground hook the data wire to the ALDL data Pin and jump Pins a&b with a 10K resistor and it would work.

 

Thats how I did it and yes it worked.

 

Could someone post a schematic of the max233 cable that makes a little more sense than the one above? I just got my 233a chip in the mail and would like to start building an interface.
The questions I have are:
1. How does pin 9 on the PCM I/F relate to ALDL?
2. Only two wires hook up to ALDL? Will this work for MAF cars?
3. Moates said this circuit still needs a voltage reg....why is it not on the schem.?

Any help you can provide will be GREATLY appreciated.

Thanks,
James

 

http://www.techedge.com.au/vehicle/aldl8192/8192hw.htm

Here's the one I used. Works great

Originally used it on my 165 MAF, and it worked well. Converted to 165 MAP/808 code and it still works great.

You still need the reg, it's on this schematic.

Yes, only the two wires hook up to the ALDL if you pull your ground elsewhere.

 

And it specifies in the notes what to do if you want to use a max233 processor instead of the max232.

 

Thanks for the link onebinky!...I'll try that out and see if it works.

James

 

No problem, good luck with it