#ALDL CONNECTOR GM MANUAL#

Some of the detailed information was taken from. Chrysler, ALL European imports, and MOST Asian imports Pins 2, 4, 5, and 16 are used, but NOT 10. SAE J1850 VPW (Varible Pulse Width modulation) Pin 4, 5, and 16 are mandated as part of the OBD-II standard.ДЄs far as pins 2, 6, 7, 10, 14, and 15 are concerned, these are the protocols and manufactuers that use them: NOTE: Depending on which type of vehicle you own (and which protocol is uses to transmit information), you will have a different combination of pins 2, 6, 7, 10, 14, and 15. It will state 'ODB II Certifed.'ДЄnd just in case anyone is curious, the OBD-II Certified standardized 16-pin DTC plug is arranged like this: You can find out if your vehicle is OBD-II compliant by looking at the Vehicle Emission Control Information label on the top of the radiator shroud. The Vehicle Emission Control Information label under the hood states 'OBD-I Certified.' Now I'm not sure if that's because they put the wires in the wrong place, or if because something else is even more screwed up.Д«TW- More good information everyone should know. My bet is that if I move pins 9 and 14 to pins 2 and 10 (the standard OBD-II placement for GM vehicles) that I can get a OBD-II scanner to read the codes. When all you have is a flashlight, it's a little hard to pick out the colors.) The 16-pin on my 1995 LeSabre looks like this:ДЁ = Door Lock Programing (short to ground, 4 or 5) - (black/white)Д© = Unknown, Hot w/ Ignition (tan or pink or orange)ДЎ4 = Unknown, Constant Hot (blue or navy or purple) Then the standard either changed, or due to some political thing all the pins had to be re-arranged, etc. My guess is, this group of vehicles was installed with a 16-pin DTC connector believing that they would be OBD-II complient. No combiniation intializes the codes-by-blink mode, which is also something that is characteristic of a PCM. I have tried every possible pin to ground (after a lot of time with a multi-meter). The location of the contact differ from the above plug. Those diagrams also refer to a DTC connector, rather than an ALDL connector on other diagrams for different VIN codes / Body Styles of the same year. I've also refered to component location diagrams for the VIN L engine (3800 SFI V6), and it identifies the module location as a PCM. Judging from the wiring, plugs, and number of terminals, the car uses a PCM not an ECM. I know they exist because my 1995 LeSabre is one of them. The second group of vehicles have a different pin out than above.

#ALDL CONNECTOR GM MANUAL#

This where the information I gained from the Haynes code manual stops, and I start babbling about my car. To do so, you short pins 5 and 6 on the above diagram. The IMPORTANT thing to know about this group of vehicles, is that you can still get the old style error codes from a blinking Service Engine Soon light. Short 5 (ground) and 6 (test) to recieve ECM error codes via the SES indicator. The pin out of the 16-pin connector for these vehicles looks something like this: (The 1995 S-10 is the example used in the manual.) These vehicles are NOT OBD-II complient and will not work with OBD-II scanners. The 16-pin connector is not a DTC connector, but is rather a modified ALDL connector. The first group of vehicles still contain an ECM, rather than a PCM, and thus still report codes via flashing the MIL/SES light. There are at least groups of 1995 vehicles which have a non-standard 16-pin connector. However, those 1995 vehicles came in different flavors depending on the vehicle and what part of 1995 it was manufactured. The move to OBD-II standardization started in 1994, GM started phasing it in during 1995. When I looked up the code retrieval for GM Domestics, I found a special note relating to 1995 GM vehicles. It talks about some Fords where you can't use the diagnostic port without a scanner, so you climb under the vehicle, pull apart a harness, short two wires for 2 seconds, take the jumper off, short the wires again, and then it will blink the codes. This book gets deep into the grit of obtaining error codes on all sorts of vehicles, including some OBD-II complient vehicles where the manufactuer has left a way for the non-mechanic to get the error codes without a OBD-II tool. The Haynes Computer Codes and Electronic Engine Management Systems Manual Suprisingly it was rather up-to-date and contained some hard to find information. Ran across the following book in Barnes and Noble today.

Aldl connector gm