JimD Posted January 12, 2006 Report Share Posted January 12, 2006 If you are interested in learning about and/or messing with the various pieces of the OnStar hardware in your vehicle, take a look at this relatively new board. Details on "easy" (inexpensive) upgrade to Gen. 6 digital capable hardware, pulling out the GPS data, antenna ideas, and more. http://www.onstarforum.com/phpbb/index.php Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
BodybyFisher Posted January 12, 2006 Report Share Posted January 12, 2006 Thanks Jim Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
JimD Posted January 12, 2006 Author Report Share Posted January 12, 2006 Thanks Jim I was drilling down in one of those other pages you sent me when I found that one. I am always skeptical about information from web sites because so much of it is misleading-incomplete-incorrect-wrong. When I find a site that contains reliably accurate information, it gets a bookmark. Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
BodybyFisher Posted January 12, 2006 Report Share Posted January 12, 2006 I have been looking through that forum and as usual there are OnStar lovers and OnStar haters... The idea that police can listen in doesn't really bother me as I don't have anything to hide.. There was information on the Class 2 Data Bus, I think my 96 Deville has it http://www.pac-audio.com/protocol%20info/class2.htm Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
JimD Posted January 12, 2006 Author Report Share Posted January 12, 2006 I have been looking through that forum and as usual there are OnStar lovers and OnStar haters... The idea that police can listen in doesn't really bother me as I don't have anything to hide.. There was information on the Class 2 Data Bus, I think my 96 Deville has it http://www.pac-audio.com/protocol%20info/class2.htm Law enforcement would be bored to tears listening to conversations in my car! Everything I have read about data distribution standards in vehicles leaves me feeling that GM started using Class 2 in 2000. And not in all brands. Logan?? Jim Drive your car. Use your cell phone. CHOOSE ONE ! Link to comment Share on other sites More sharing options...
Logan Posted January 12, 2006 Report Share Posted January 12, 2006 http://news.com.com/2100-1029_3-5109435.html I have been looking through that forum and as usual there are OnStar lovers and OnStar haters... The idea that police can listen in doesn't really bother me as I don't have anything to hide.. There was information on the Class 2 Data Bus, I think my 96 Deville has it http://www.pac-audio.com/protocol%20info/class2.htm Law enforcement would be bored to tears listening to conversations in my car! Everything I have read about data distribution standards in vehicles leaves me feeling that GM started using Class 2 in 2000. And not in all brands. Logan?? Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
BodybyFisher Posted January 12, 2006 Report Share Posted January 12, 2006 Jim, I knew that I read something about Class 2 in my manual, but its not 100% Class 2, from my brief research. Mike Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
Logan Posted January 12, 2006 Report Share Posted January 12, 2006 Hell yes, OnStar is on the Class 2 network. The service manual does not directy reflect this. But look at vehicle cell comunications and the VIU module. Currently, GM offers a monthly vehicle diagnostic report. Powertrain, air bag, codes, whatever..... Data Link Communications Description and Operation The data link connector (DLC) allows a scan tool to communicate with the class 2 serial data line. The serial data line is the means by which the microprocessor-controlled modules in the vehicle communicate with each other. Once the scan tool is connected to the class 2 serial data line through the DLC, the scan tool can be used to monitor each module for diagnostic purposes and to check for diagnostic trouble codes (DTCs). Class 2 serial data is transmitted on a single wire at an average of 10.4 10,400 bits per second (Kbps). This value is an average, class 2 uses a variable pulse width modulation to carry data and, depending on the message, it may operate faster or slower. The bus is active at 7.0 volts nominal and inactive at ground potential. When the ignition switch is in RUN, each module communicating on the class 2 serial data line sends a state of health (SOH) message every 2 seconds to ensure that the module is operating properly. When a module stops communicating on the class 2 serial data line, for example if the module loses power or ground, the SOH message it normally sends on the data line every 2 seconds disappears. Other modules on the class 2 serial data line, which expect to receive that SOH message, detect its absence; those modules in turn set an internal DTC associated with the loss of SOH of the non-communicating module. The DTC is unique to the module which is not communicating, for example, when the dash integration module (DIM) SOH message disappears, several modules set DTC U1064. Note that a loss of serial data DTC does not normally represent a failure of the module that set it. Data Link Connector (DLC) The data link connector (DLC) is a standardized 16 cavity connector. Connector design and location is dictated by an industry wide standard, and is required to provide the following: Scan tool power battery positive voltage at terminal 16. Scan tool power ground at terminal 4. Class 2 serial data at terminal 2. Common signal ground at terminal 5. Class 2 Serial Data Line The data line is a ring/star configuration with discrete circuits entering and leaving each module. This allows communications to the modules on the ring if one of the 2 discrete circuits is open. A total list of the control modules on the Class 2 Serial Data Line can include the following: Audio amplifier Cellular telephone module w/UV8 Dash integration module (DIM) Driver door module (DDM) Driver door switch assembly (DDSA) Electronic brake control module (EBCM) Electronic suspension control module Front passenger door module (FPDM) Inflatable restraint sensing and diagnostic module (SDM) Instrument panel cluster (IPC) Instrument panel integration module (IPM) HVAC control module - auxiliary Left middle door module (LMDM) w/V4U Left rear door module (LRDM) Memory seat module (MSM) w/A45 Navigation data processor w/UY4 Navigation display head w/UY4 Powertrain control module (PCM) Radio Rear integration module (RIM) Remote control door lock receiver (RCDLR) Right middle door module (RMDM) w/V4U Right rear door module (RRDM) Steering column module Theft deterrent control module Window switch - front passenger w/armored car The following modules have only one communication line connection to the Class 2 serial data circuit: Audio amplifier Cellular telephone module w/UV8 Driver door module (DDM) Driver door switch assembly (DDSA) Electronic suspension control module Front passenger door module (FPDM) HVAC control module - auxiliary Left middle door module (LMDM) w/V4U Left rear door module (LRDM) Memory seat module (MSM) w/A45 Navigation data processor w/UY4 Radio w/UY4 Rear integration module (RIM) Remote control door lock receiver (RCDLR) Right middle door module (RMDM) w/V4U Right rear door module (RRDM) Steering column module w/N37 Theft deterrent control module Vehicle interface unit (VIU) w/UE1 Window switch - front passenger w/armored car Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
tjtjwdad Posted January 12, 2006 Report Share Posted January 12, 2006 Law enforcement would be bored to tears listening to conversations in my car! If I thought they were evesdropping in on me I'd put a Barbara Streisand CD in and let them choke on that. Jim Link to comment Share on other sites More sharing options...
Logan Posted January 12, 2006 Report Share Posted January 12, 2006 "Currently, GM offers a monthly vehicle diagnostic report. Powertrain, air bag, codes, whatever....." via OnStar. It can also send accident/deployment notification. Look at the VIU module.... Logan Diagnostic LLC www.airbagcrash.com www.logandieselusa.com www.ledfix.com www.ledfix.com/yukontaillightrepair.html www.ledfix.com/ledreplacements.html www.ledfix.com/j42385toolrental.html Link to comment Share on other sites More sharing options...
BodybyFisher Posted January 12, 2006 Report Share Posted January 12, 2006 Law enforcement would be bored to tears listening to conversations in my car! If I thought they were evesdropping in on me I'd put a Barbara Streisand CD in and let them choke on that. Jim I made a Frisbee out of my Guilty album (1980) that she did with Barry Gibb Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
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