Andy tiger Posted May 15, 2011 Report Share Posted May 15, 2011 Hi all been a while My 1996 Eldorado has broke down I had a message on the computer after it cut out saying "check fuel system" but it did restart straight after ? then the next morning it started up fine and never mucked about but after 8 miles it cut out and refused to start? I have checked fuses and they are not blown. But the 20amp fuel pump fuse in the fuse box in the engine bay has no 12v power to it according to the book its supposed to be hot all the time? So to check if the pump is ok we ran a wire from the battery to the pump wire bypassing the fuse and relay and the pump sounds like it runs but car still wont start just turns over. Could it be something to do with the immobilizer system Or something I have missed ? what other checks am I missing It has fuel in the tank Many Thanks Andy Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted May 15, 2011 Report Share Posted May 15, 2011 Fuel pressure regulator? It is a maintenance item after a bit on these. * Check for fuel in pressure regulator vacuum hose. If fuel is present, replace regulator assembly. Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
Cadillac Jim Posted May 15, 2011 Report Share Posted May 15, 2011 The FPR won't throw a code but a bad fuel pump relay or fuse will. Read your OBD codes and post them here. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 15, 2011 Report Share Posted May 15, 2011 Yep as Jim noted check for your codes, if you got a message a code was set Do you know how to check for codes? You do not need a reader nor do you need to go to have them read anywhere 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...
johnnyjaws Posted May 15, 2011 Report Share Posted May 15, 2011 could be your ing 1 relay just happend to my car Link to comment Share on other sites More sharing options...
rockfangd Posted May 15, 2011 Report Share Posted May 15, 2011 sounds like a relay problem. Supplying power to a fuse via another source is not something I recommend on these cars as if there is a problem it can create more prooblems GM FAN FOREVER Nice, clean, luxury= fine automobile Link to comment Share on other sites More sharing options...
Andy tiger Posted May 15, 2011 Author Report Share Posted May 15, 2011 Thank you for you replies. I will go and pull codes tomorrow as its at my yard..I remember I puled codes when I had transmission problems last year But found out the codes are different to the normal US codes as its a export from Japan...I think I remember how to do it if not I think I left the instructions in the car LOL Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 15, 2011 Report Share Posted May 15, 2011 Yes the export codes are different, but we should be able to help. You can go to this link to get the procedure for your year and model http://www.caddyinfo.com/readingcodes.html 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...
Andy tiger Posted May 16, 2011 Author Report Share Posted May 16, 2011 I Managed to pull the codes there are quite a few and many thanks for all the help so far PC0603 /History IP1152 /History IP2016 /History IP2750 /History AC1340 /History AC1348 /History AC1350 / History AC2255 / History AC2016 History TC0072 /History TC0073 /Current TC0077 /History RS0044 /Current RS0060 /History PZ1552 /History PZ2473 /History PZ2016 /History PZ2255 /Current NO CODES FOR RFA, CCP, SDM, PCM? Link to comment Share on other sites More sharing options...
Ranger Posted May 17, 2011 Report Share Posted May 17, 2011 You'll find the code definitions here. http://myweb.accessus.net/~090/dtcobd2.html '96 was the transition year from OBDI to OBDII so you have some of each. Any not found in the OBDII link will be in the OBDI link. http://myweb.accessus.net/~090/dtcobd1.html Link to comment Share on other sites More sharing options...
Cadillac Jim Posted May 17, 2011 Report Share Posted May 17, 2011 These codes look like a combination of OBD I and OBD II codes. I'll psychoanalyze them in the morning. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
Cadillac Jim Posted May 17, 2011 Report Share Posted May 17, 2011 This is guesswork, based on OBD I and OBD II plus GM-specific codes: From PCM PC0603 P0603 Control Module Long Term Memory Reset From IPM U1152 Loss Of ACM Serial Data Communication IP2016 [possibly] P016 (E016) Voltage Out of Range [ALL SOL] IP2750 B2750 PASSKey Data Communication Failure From ACM AC1340 B1340 Air Mix Door One Movement Fault AC1348 B1348 Very Low A/C Refrigerant Pressure AC1350 B1350 Engine Coolant Over-Temperature AC2255 AC2016 From TCS TC0072 T072 Serial Data Link Fault TC0073 T073 PCM - EBTCM/EBCM Pulse Width Modulation Signal Fault TC0077 S077 Right Rear Accelerometer Overcurrent From RSS RS0044 GM 44 Warning Lamp Circuit Open or Short to GND RS0060 From PZM PZ1552 B1552 Keep Alive Memory (KAM) Error PZ2473 B2473 High Beam Fault PZ2016 PZ2255 This is entirely too many codes. It looks like a low or intermittent battery, or lots of undercar shorts - "car wash codes." I would check the battery and cables, then clear the codes from the A/C console buttons, then drive the car and see what comes back. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
joeb Posted May 17, 2011 Report Share Posted May 17, 2011 hard to clear codes and drive it when it won't start. Link to comment Share on other sites More sharing options...
Andy tiger Posted May 17, 2011 Author Report Share Posted May 17, 2011 Cheers for the replies Ranger and Jim and everyone and your advice and work figuring out the code differences I have Had this reply from a friend on another club forum I use http://www.amvo.org/forum/viewtopic.php?f=1&t=15261&start=45 Is it possible that the immobilizer is playing up just read through this lot.... I had a prob with my car similar to the fault u described (dont know if yours is the same but)..... read on... (sorry but this is written in blonde with my understanding of what Jase did - so hope u understand). There is a tiny metal chip on the key that works the immobilizer... there is a forked prong type device which clips onto this when you place the key in the ignition. Over time this prong thingy gets weak and does not make enough of a connection to the keys chip to work the ignition... so Jase soldered (very carefully) a tiny bit of solder to the chip thingy on the key and it fixed the prob by making the key the tiniest bit slightly wider to connect to the prong thingy. Was fine for months on end n then refused to start again recently... tiny solder thing done again and its fine again. Its something about the resistance but u'd need Jase to answer that. The car then recognizes that there is a prob and leaves the security light on the dash but it disables something that stops it starting. Clear as mud?? Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 17, 2011 Report Share Posted May 17, 2011 B2750 PASSKey Data Communication Failure You are referring to the passkey or security I believe by immobilizer. Your key has a resister built into it, make sure it is clean, spray it with WD40 and push it in and out of the luck mechanism to clean the contacts in the switch, till you think its clean. This could could be related to a bad battery or connections also or bad connections. This car does not crank does it? What happens when you turn the key? 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...
Cadillac Jim Posted May 17, 2011 Report Share Posted May 17, 2011 Yes, this is the theft prevention system. Rather than solder wear extensions on my key, I get a new key when this happens. That way I see it only every two or three years. Normally this throws OBD codes too. Often you get messages on the DIC, such as request to take the key out and a wait of a few minutes to start, or perhaps less forceful things like a warning that the car may not start the next time. -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 17, 2011 Report Share Posted May 17, 2011 Also, if the contacts in the ignition are determined to be defective you can permanently solder the correct value resistor into the circuit, others have done that here before. That wouldl eliminate the need to have the key make a good connection 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...
Andy tiger Posted May 17, 2011 Author Report Share Posted May 17, 2011 Hi Bob The car does crank over but refuses to even try and start I Have used a electrical test meter and there is no Power to the fuel pump fuse or relay the reading I got for the 10A fuse with the Ignition on was 0.16v and 0.00 at the relays 1 2 3 and 5 connections.. the cars battery reading was 12.6v We ran a wire from the battery to the relay,s power out connection and the fuel pump runs but it still don't want to start. SO we are a bit foxed as to whats up now Link to comment Share on other sites More sharing options...
Andy tiger Posted May 17, 2011 Author Report Share Posted May 17, 2011 Often you get messages on the DIC, such as request to take the key out and a wait of a few minutes to start, or perhaps less forceful things like a warning that the car may not start the next time. I have had both of those in the past(quite a while ago actually) but it has never refused to start after I have stopped and restarted Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 17, 2011 Report Share Posted May 17, 2011 You will have no power at the fuel pump if the theft system is engaged from what I see you are having a problem with the theft system. CONFIRM THIS you turn the key and it does NOT crank, you get NOTHING at all, correct? Yes or NO? What messages do you have coming up on your dash? 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...
Andy tiger Posted May 17, 2011 Author Report Share Posted May 17, 2011 You will have no power at the fuel pump if the theft system is engaged from what I see you are having a problem with the theft system. CONFIRM THIS you turn the key and it does NOT crank, you get NOTHING at all, correct? Yes or NO? NO It just Cranks overWhat messages do you have coming up on your dash? No Messages come up BUT I will go double check tomorrow to confirm Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 17, 2011 Report Share Posted May 17, 2011 Please put the year of your Eldorado in your description by your avatar, I had to go back to the beginning to see what year this was, see my avatar and description I am going to pull the manual out, I can't help but think that the Please dont JUMP power to ANYTHING like you did with the fuel pump that is a great way to blow the PCM 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...
BodybyFisher Posted May 17, 2011 Report Share Posted May 17, 2011 Have you checked the Fuel Pump 20 amp fuse? Do you have power at the fuse?, it is HOT in RUN and START, its located in the engine compartment fuse/relay center Do you have power going IN and COMING OUT of the Fuel Pump Relay (Pink at B3 is IN, and GREY at A1 is out) with the key on? It's also located in the engine compartment fuse/relay center Answer those questions and that should be telling Just for reference, a code P1632 is the Theft Deterrent System Fuel Disabled, it will not allow fuel due to a perceived theft attempt or worn or incorrect key. The MIL light will NOT illuminate, and NO message will display. This code will be set when incorrect resistence value or unrecognizable resistence value from the key is received from the key. The theft deterrent system has a fuel enable output that it engages ONLY when it sees the proper resistance at the key, it will send a serial data message to the PCM. If the IPC does not see the proper resistance at thekey it will not send the message to the PCM See this thread, they have the same symptom http://www.cadillacf...um/t-67594.html 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...
BodybyFisher Posted May 17, 2011 Report Share Posted May 17, 2011 Read this, you have a pass-key II system http://www.thirdgen.org/vats_passkey_system I am trying to find out what causes the B2750 code See this http://www.cadillacforums.com/forums/cadillac-deville-1985-2005-including-1985/98940-theft-deterrent-system-96-deville.html and this http://www.cadillacforums.com/forums/cadillac-seville-cadillac-eldorado-forum/140439-passkey-relearn.html and this http://www.justanswer.com/cadillac/48cbv-cadillac-deville-hi-bought-99-caddi-deville-dash.html Have you attempted to change any of the customization features on the Instrument Panel? 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...
Cadillac Jim Posted May 17, 2011 Report Share Posted May 17, 2011 B2750 PASSKey Data Communication Failure -- Click Here for CaddyInfo page on "How To" Read Your OBD Codes-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data -- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC Yes, I was Jims_97_ETC before I changed cars. Link to comment Share on other sites More sharing options...
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