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1999 seville an 80 degree 25 miles shut my car off got back in it to start it and would crank over but wouldn't start read codes the only car that shed but MSM B 2375 anybody know anyting about this


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1 hour ago, Mark Roeder said:

1999seville.80 degree day.Drove 25 miles,shut car off.Wont start,will crank over.

RREAD CODES--MSM B 2375 CURRENT IS WHAT SHOWS. What now?

 

B2375 is related to the seat.

That is the only code?

Check fuel pressure, key on.  Have someone sit in car and turn on key while you listen at the fuel fill.  It will run about 5 seconds.  Don't confuse the fuel pump with the level compressor for the rear suspension.  If you dont hear the fuel pump remove and reinstall the fuel pump fuse and relay to reset them. In case they have a corrosion build up of green or white clean them off with electrical contact cleaner.

It is very unusual for a crank no start in a situation like this.  

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

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See my post on your other thread.

Its only necessary to post in one spot, it gets confusing with 2 threads on the same issue 

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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23 minutes ago, BodybyFisher said:

Did you ever resolve this from the other day?

B2375 is related to the seat.

That is the only code?

Check fuel pressure, key on.  Have someone sit in car and turn on key while you listen at the fuel fill.  It will run about 5 seconds.  Don't confuse the fuel pump with the level compressor for the rear suspension.  If you dont hear the fuel pump remove and reinstall the fuel pump fuse and relay to reset them. In case they have a corrosion build up of green or white clean them off with electrical contact cleaner.

It is very unusual for a crank no start in a situation like this.  

Where is the fuel pump fuse & relay?

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Check the basic stuff first , fuel pressure 

 

There is a ground under the air filter housing on the drivers frame rail . It was there in 1998 and early 1999. It’s held in by a 10mm bolt .. the bolt is rusted on the bottom side and will break . I relocate it the ground on the bottom stud of the expansion tank . This will cause issues with phantom no starts or stall.

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1 hour ago, Bruce Nunnally said:

Merged Topics

Thanks Bruce

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 was thinking the same thing as @barczy01 that is why I said check fuel pressure and listen at the filler to see if you hear it cycle.   Thats easy stuff.  

THEN, if you don't find pressure, then check fuses, relays.  Look into barczy01's ground issues thats great info.

Here are 2 photos out of your owners manual showing the pump fuse and relay location, the fuse panel is under the seat

Screenshot_20190611-210022_Drive.jpg

Screenshot_20190611-210116_Drive.jpg

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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First off Longest title ever😁

Have someone remove the gas cap and listen as you turn the key on. 

Pump should prime for 3 seconds.

It was very common in this era for the fuel pump plug to burn atop the fuel pump unit. 

Fails unexpectedly when you least expect it. Not sure if yours has a access under the back seat for it.

Post results first and We can go farther with diag

Welcome to CaddyInfo

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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@rockfangd

Longest title ever!

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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On 6/11/2019 at 4:12 PM, barczy01 said:

 

Check the basic stuff first , fuel pressure 

 

There is a ground under the air filter housing on the drivers frame rail . It was there in 1998 and early 1999. It’s held in by a 10mm bolt .. the bolt is rusted on the bottom side and will break . I relocate it the ground on the bottom stud of the expansion tank . This will cause issues with phantom no starts or stall.

Thank you.

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On 6/11/2019 at 7:28 PM, rockfangd said:

First off Longest title ever😁

Have someone remove the gas cap and listen as you turn the key on. 

Pump should prime for 3 seconds.

It was very common in this era for the fuel pump plug to burn atop the fuel pump unit. 

Fails unexpectedly when you least expect it. Not sure if yours has a access under the back seat for it.

Post results first and We can go farther with diag

Welcome to CaddyInfo

Going to check plug on top of fuel pump

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Good. Very common issue. If pump unit is original I would suspect it. Sometimes they burnt inside the tank as well.

The new fuel pump unit should come with the repair harness

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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3 hours ago, Mark Roeder said:

Checked ground--o.k.cant  hear fuel pump checked pump fuse and relay there okay I'm going to open inspection cover in trunk at tank

I am not sure the 99 had an inspection cover in the trunk, I think that began in 01.... but I am hoping I am wrong..  

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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Did find an inspection cover in the trunk? If not you will need to drop the tank.

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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Opened lnsp.cover.plugs on top of tank connected.Looks o.k.

On 6/11/2019 at 7:28 PM, rockfangd said:

First off Longest title ever😁

Have someone remove the gas cap and listen as you turn the key on. 

Pump should prime for 3 seconds.

It was very common in this era for the fuel pump plug to burn atop the fuel pump unit. 

Fails unexpectedly when you least expect it. Not sure if yours has a access under the back seat for it.

Post results first and We can go farther with diag

Welcome to CaddyInfo

Thank you

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JuIt is good to know that a 99 has an inspection cover 

So to summarize

You turn the key on and the pump does not run?

Connect a volt meter to the fuel pump leads and have someone turn the key on, do you get a few seconds of power?  If you do, the fuel pump is at fault if it doesn't cycle.  If you dont, I would check for power at the relay.  

We need a 99 Seville fuel pump schematic for you.  Ill see if I can get one.  

In my 96 manual at the relay, Grey is the fuel pump motor feed.  BLK/WHT is a ground.  DK GRN/WHT is the fuel pump relay feed - coil.  And PNK is fused output - Ignition 1.  

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 accidently posted a link to Kevin Burden and thought I deleted it the other day it looks like it was referenced above.  I think his problem was an alternator.  I momentarily confused these 2 threads.  Sorry about that.  Working off a smartphone is limiting at times.

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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