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Cadilac Eldorado wont start


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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

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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

2016 Cadillac ATS-V gray/black

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The FPR won't throw a code but a bad fuel pump relay or fuse will. Read your OBD codes and post them here.

CTS-V_LateralGs_6-2018_tiny.jpg
-- 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.

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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

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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

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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

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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

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I Managed to pull the codes there are quite a few and many thanks for all the help so far :D

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?

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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

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These codes look like a combination of OBD I and OBD II codes. I'll psychoanalyze them in the morning.

CTS-V_LateralGs_6-2018_tiny.jpg
-- 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.

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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.

CTS-V_LateralGs_6-2018_tiny.jpg
-- 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.

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Cheers for the replies Ranger and Jim and everyone and your advice and work figuring out the code differences :D

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??

Edited by Andy G
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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

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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.

CTS-V_LateralGs_6-2018_tiny.jpg
-- 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.

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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

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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

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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 :)

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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

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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 over
What messages do you have coming up on your dash?
No Messages come up BUT I will go double check tomorrow to confirm
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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

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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

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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

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B2750 PASSKey Data Communication Failure

CTS-V_LateralGs_6-2018_tiny.jpg
-- 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.

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