I jsut got a calbe from Andrew at AKM Cables. This was a custom cable he built for me. It consists of an OBD2 ALDL connector with 4 wires. 1 wire is 12 volt possitive , 2 wires soildered together are 12Volt negative, then one single blue wire with a pin attatched to the end ( communication wire i belive) Pictures below
http://www.clanulf.com/tazcar/public/ALDL.JPG
http://www.clanulf.com/tazcar/public/cable.JPG
http://www.clanulf.com/tazcar/public/cable2.JPG
http://www.clanulf.com/tazcar/public/RearALDL.JPG

Now I have 2 goals I need to accomplish with this cable.

#1 goal is to use LT1_edit to capture and tune my PCM file while PCM is NOT attached to car or attatched to bench dynometer.
I need to be able to do this to flash the HPP3 off the PCM to get the gearing and cooling #'s and be able to sell my HPP3. Also I need to do some settings to the injectors and others before we start the 383 LT1 on the dyno.

#2 goal is to use LT1_edit to data log and tune further while engine is attached to Bench dynometer. This is a must so I can get best A/F ratio and also have Nitrous tunes and track tunes with race gas. I am spending alot of downtime to be able to have the benefits of a actual bench dyno and I dont want to pass this opportunity up.

AKMcables.com has a somewhat blury tutorial but its for OBD1 connections.

What I need to know is where do these different wires connect to the pcm ?

Im assuming I need to supply my own 13.8 Volt DC regulated power supply to the red(possitive) and black/white(negative) and then the blue wire plugs into the PCM somewhere? IS this all I need? and if so Which wire/pin do I connect the blue wire to on the PCM itself?

Incase anyone is wondering This cable is to replace the ALDL connector in the car because the engine is being bench dyno tuned be4 we put it in the car.

Thanks for any help you can provide.

 

Here is the OBD2 Pin out:

C1 Red connector:

Pins 1 and 18 are grounds------------------------------> ALDL port 5

C2 Black connector:

Pins 3, 15, 30 and 15 are ECM Bat 12v -------------> ALDL port 16

C3 Clear or Grey connector:

Pins 2 and 32 are grounds

C4 Blue connector

Pin 30 is the uart data line------------------------------> ALDL port 9

I am not sure about OBD2 PCMs but I do know that all of the grounds and power points at the PCM has to be connected before it will communicate with my Tunercat software or LT1 Edit for OBD1.

I hope this helps you out.

 

Is there anywhere that we can order those red, blue, black, and grey translucent connections that goes into the PCM? I'd rather have these on there so I can just plug them into the pcm for tuning instead of everytime keeping up with which pins to plug into.

Thanks

D Moss

 

I think you can order some from radioshack but those are not quite exactly like stock. (it will plug in but the plastic isn't as durable)

I have some stock ones available I can sell for $25 shipped a set and they do come with pins and a short length of wires that you can use for your harness.