tunercat and lt1 peeps, need some advice..

[piston]

i just got tunercat downloaded and wired up my obd1 port, and got my akm obd1 usb cable and cd loaded. when i click on the top screen in tools to go to read the pcm, it says cable failed. not reading any signal. i have my ground wire on the obd1 port (A) hooked up to ground and the other one (M) goes to blue connector, tried both pin 29 and 30 and even field service enable pin 20...got nothing. i dont know if its the akm cable or the pcm itself. heres what i tried so far..

 

i switched the tiny switch on the akm cable back and forth and didnt make any difference.

 

i moved the M wire back and forth between pins 29 and 30, got nothing.

 

cliked on all three pcm_ee, pcm_eeb and ecm_42, switched back and forth, still no signal.

 

checked the pins to see if it will light up my tester tool, didnt get any signal, dont know if its suppose to but thought id tried.

 

all the wires and the cables are tight and connected, dont know why its not reading any signal from the pcm when i try to read the pcm. i tried a generic gm obd1 code reader and it wasnt able to read any codes either but the code reader turns on my radiator fan meaning ther is some signal somewhat right? im trying to tune my pcm and delete out some more stuff im not using and get rid of the check engine light in hopes of it running better...what do you guys think might be wrong or any inputs on what next to check? the car runs fine...thanks in advance...

[80LS1T]

You need three wires to the DLC:

1: D30 (serial data) goes to "M" on the DLC

2: D20 goes to "B" on the DLC

3: "A" on the DLC goes to chassis ground

You should have the top connector.

 

If you wired your DLC connector this way you should be able to connect with Tuner Cat. Also make sure your "comm setting" is correct in Tuner Cat. Your cable should be on comm 1, 2, 3, or 4. Did you get software with your cable? I did and it wouldn't work without the software loaded onto my computer(I bought my cable like 2 years ago though...).

 

Guy

[piston]

ill check the comm setting, and yes i loaded the cd already but didnt know it also had settings on tunercat for which number wires to use. i need to connect the pin 20 and see if that will also work. i always thought i just had to hook up a and m and the other one ( optional for running code tests or diagnostic purposes and i didnt need it for tunercat but ill try it. i threw away the wire and pulled the in out so i only now have two wires. ill ghetto rigged that and see it itll work.