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Multiple problems


jim

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I have a 1996 DeVille, its been sitting in the garage for about a month. When I started it up today the ABS light stayed on, and when I put the car in gear the traction control light also went on. After all that I also have no turn signals but the hazzards work. I checked the fuses and they are OK. I figured with multiple problems it was a fuse. Does anybody have any other ideas?

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Call up the DTC codes and post them here, they will help us diagnose your problem.

You have an on board diagnostics system that will provide you with any diagnostics codes that are stored by the computer. Go to the top of the page, click HOW TO, DTC Codes, READING CODES, you will get the procedure.

You might start by cleaning the battery cables and taking the car on a run to charge up the battery. This could be related to a low battery and bad connection also..

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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Call up the DTC codes and post them here, they will help use diagnose your problem.

You have an on board diagnostics system that will provide you with any diagnostics codes that are stored by the computer. Go to the top of the page, click HOW TO, DTC Codes, READING CODES, you will get the procedure.

You might start by cleaning the battery cables and taking the car on a run to charge up the battery. This could be related to a low battery and bad connection also..

Thanks for the reply. The battery is low, maybe I should start by giving it a full charge. As for the codes there were several. RS0011 (history), PC1602 (history), PZ2042 (History) PC1571 (current) TC0073 (current).

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I am going to say it's just the battery, When the cars battery is low, This Stupid worthless ECM that GM created doesnt fully bootup if you will, and it causes codes, just run the shut it down, restart it and I bet its all clear. It has happened to me as my car sits all winter long. Good luck!

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This Stupid worthless ECM that GM created

I tend to be a little kinder to GM. I have built 500 computers in my lifetime and have always used high performance power supplies with LOTS of headroom from PC POWER AND COOLING, and currently have a 500 watt power supply in my desktop. ANY computer device will faulter without proper power even computers from FORD, CHRYSLER, etc..

This occurred in 1996:

A more powerful Powertrain Control Module (PCM) with micro-processors monitored and directed DeVille engine/transmission operations.

Clock speed of the PCM microprocessor was increased from 2.1 megahertz to 3.4 megahertz, which improved processing time 63 percent. Memory size was increased from 64 kilobytes to 96 kilobytes.

In addition, the PCM was moved from the passenger compartment to the air cleaner housing. This move enhanced engine harness reliability by reducing wiring lengths and minimized the number of wires passed through the front of the 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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I have a 1996 DeVille, its been sitting in the garage for about a month. When I started it up today the ABS light stayed on, and when I put the car in gear the traction control light also went on. After all that I also have no turn signals but the hazzards work. I checked the fuses and they are OK. I figured with multiple problems it was a fuse. Does anybody have any other ideas?

If you have an open in the brake lamp circuit you will get ABS and a TCS messages. It the Center High Mount Stop lamp circuit is open you will get the ABS & TCS messages. Depending on the cars wiring it may just be a turn signal or hazard switch problem. I don't have a 96 book with me.

12.58 second Northstar with a GM/Cadillac PCM

Cadillac Technician @ Crest Cadillac Brookfield WI

Hometown Washougal WA

avatar9513_1.gif

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Today I charged the battery and found very cruddy cables. Cleaned terminals and cables, still have ABS light, traction control light, and no turn signals. ALL bulbs are good including high stop light. Replaced electronic turn signal flasher but still no change. I have many codes, and they are as follows.

PC 0603 (History), PC 1571 (Current), PC 1602 (Current), PC1664 (History), IP 1552 (History), IP 1910 (History), RS0011 (History), PZ 2042 (Current), IR 2255 (History).

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Today I charged the battery and found very cruddy cables. Cleaned terminals and cables, still have ABS light, traction control light, and no turn signals. ALL bulbs are good including high stop light. Replaced electronic turn signal flasher but still no change. I have many codes, and they are as follows.

PC 0603 (History), PC 1571 (Current), PC 1602 (Current), PC1664 (History), IP 1552 (History), IP 1910 (History), RS0011 (History), PZ 2042 (Current), IR 2255 (History).

Your current codes:

DTC PZ1571 Traction Control Torque Request Circuit

DTC PC1602 Loss of EBTCM Serial Data

DTC PZ2042 Loss of Seriel Communications

******************************************************

Circuit Description of PZ2042

The PZM (body control module) sends UART data messages to controllers for the bus and maintains a counter which increments with each message to the module. When the module responds to the message, the counter is cleared.

The DTC will set when:

If the PZMs message counter for this device exceeds 20.

Troubleshooting Hints

Check the EBTCM ground and power inputs

If DTCs PZ 2056 and 2088 are also current, check for a short to a ground or voltage in CKT 800 (tan)

To ensure that the Antilock Brake/Traction control system is functioning normally, perform the ABS System Check (see Section 5E2 in the FSM)

If the Antilock Brake/Traction control system is functioning properly, check for proper connection at EBTCM terminal 29, and CKT 800 (TAN) for an open.

If all checks out, replace EBTCM

**********************************************************

I could not find details on the DTC PZ1571 Traction Control Torque Request Circuit

**********************************************************

IP 1910 Alternator L-Terminal Open Circuit

This test is only performed when the engine is not running and Service Diagnostics is not active. The DTC indicates an open circuit in the Alternator L Terminal Feedback Circuit.

This test determines if the IPC is malfunctioning

This test determines whether the malfunction is in the IPC or the wiring

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 checked ground wire at EBTCM and voltage at fuses I did not lift the lock lever and remove the wiring harness from it because I coudn't really reach it well and was afraid to disturb it. Also wile the fuses are ok for the turn signals and ABS the was no voltage there.

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Is there any way to clear the codes? Then maybe drive the car and look for new codes. Because I checked codes friday night, and there were 5 codes set. Then after disconnecting the battery cables and cleaning them, and charging the battery I had 9 codes. I just wish I could get the turn signals working so I could drive the car some.

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I just wish I could get the turn signals working so I could drive the car some.

Don't know where you are located, but come on down to the Dallas area and drive it all you want to. Almost NOBODY uses turn signals here. :D:D

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Not as laid back in the Cleveland (Ohio) area. Everyone is in a big rush, and right on your tail, if you stop to turn without a signal you will get plenty of horn and a one finger salute!

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I'm still dead in the water on this ABS, Traction control problem. Anybody have the service manual schematic of this system, and maybe a trouble tree on how to diagnose this thing? Thanks

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Hello Jim, I left you a note a few days ago, but here goe's again.

Under Keywords-- Type in "EBTCM 96SLS" pick out Jan 13th, 08 w/ vern warren.

The notes also on that page will be helpful. One of our members "jcobz went into fine detail on your problem, he and Ranger and Jim, steered me thru to a successful conclusion.

I am sure this will be the info you are looking for, good luck.

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Hello Jim, I left you a note a few days ago, but here goe's again.

Under Keywords-- Type in "EBTCM 96SLS" pick out Jan 13th, 08 w/ vern warren.

The notes also on that page will be helpful. One of our members "jcobz went into fine detail on your problem, he and Ranger and Jim, steered me thru to a successful conclusion.

I am sure this will be the info you are looking for, good luck.

Thanks Vern for your reply. I looked at those posts and I checked for corrosion on the Battery 3 fuse, not bad but I cleaned it with a brass brush. I have 12 volts at that fuse but Zero voltage at my ABS fuse under the hood and zero voltage at my turn signal fuse in the trunk. Also when I use the heater buttons to get codes it says no TCS data.

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Hello Jim, I left you a note a few days ago, but here goe's again.

Under Keywords-- Type in "EBTCM 96SLS" pick out Jan 13th, 08 w/ vern warren.

The notes also on that page will be helpful. One of our members "jcobz went into fine detail on your problem, he and Ranger and Jim, steered me thru to a successful conclusion.

I am sure this will be the info you are looking for, good luck.

Thanks for the reply I looked up those posts and checked my battery 3 fuse, it wasn't too bad but I cleaned it up with a brass wire brush. It had 12v at the fuse but I have 0v at the abs fuse and the turn signal fuse. I need more pics of the fuse block and wire routing.

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Jim, it sounds you are on the first check for your problem. Jim I have a FSM, but really not computor savey. I am hoping that the supportors will read this and furnish some print outs for you.

In that group of messages (96SLS EBCM )and reply's, jacobz furnished wire diagrams that helped me, so research those as much as you can for that info.

Also, when and if, the time comes to replace the EBCM, I would avoid the Dealers, the prices are unreal. I am happy with the route that I ended up taking. Let me know how you are doing, if it comes to replace< I will furnish you with the information of the company to rebuild that modual, with upgrades in the electronics.

I know how you feel at this point, but stick with it, with the help of the group you will get it corrected.

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Jim, it sounds you are on the first check for your problem. Jim I have a FSM, but really not computor savey. I am hoping that the supportors will read this and furnish some print outs for you.

In that group of messages (96SLS EBCM )and reply's, jacobz furnished wire diagrams that helped me, so research those as much as you can for that info.

Also, when and if, the time comes to replace the EBCM, I would avoid the Dealers, the prices are unreal. I am happy with the route that I ended up taking. Let me know how you are doing, if it comes to replace< I will furnish you with the information of the company to rebuild that modual, with upgrades in the electronics.

I know how you feel at this point, but stick with it, with the help of the group you will get it corrected.

I guess I'm not too computor savy either I didn't realize my post went to a second page and I Re-posted the same twice, sorry. I will spend more time on it this week end and I will reply back thank for the help so far!

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Jim, wondering around on this web, found what you are looking for, (easier to find).

On the first page of Caddyinfo.com, go down the page to: CADS FOR SALE - Sup. by Vendors.

Go over and bring up "jcobz28" then bring up " POSTS" this will bring you into the subject that you want.

scroll down to about Dec 25. 07 and go from there, pretty lengthy, but will make things easier, there is also a diagnostic tree for the EBTCM. Again good luck

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Jim, wondering around on this web, found what you are looking for, (easier to find).

On the first page of Caddyinfo.com, go down the page to: CADS FOR SALE - Sup. by Vendors.

Go over and bring up "jcobz28" then bring up " POSTS" this will bring you into the subject that you want.

scroll down to about Dec 25. 07 and go from there, pretty lengthy, but will make things easier, there is also a diagnostic tree for the EBTCM. Again good luck

Hey I must be doing something wrong because when I go to jcobz28 the nearest I get is Dec. 20th his 100th post Woo Hoo.

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Jim, maybe it's better or easier to go the first way I mentioned.

KEYWORDS- enter "96SLS whl. sensor Prob."

Most opf that page will be about your problem. Look through, example vern Jan. 13th.

I am sorry if I'm not making this clear, so I hope again this helps.

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Jim, maybe it's better or easier to go the first way I mentioned.

KEYWORDS- enter "96SLS whl. sensor Prob."

Most opf that page will be about your problem. Look through, example vern Jan. 13th.

I am sorry if I'm not making this clear, so I hope again this helps.

Vern if you can find the thread, copy the address and post it in your thread, you will link to it so that JIM can just click on it

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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Jim, maybe it's better or easier to go the first way I mentioned.

KEYWORDS- enter "96SLS whl. sensor Prob."

Most opf that page will be about your problem. Look through, example vern Jan. 13th.

I am sorry if I'm not making this clear, so I hope again this helps.

Vern if you can find the thread, copy the address and post it in your thread, you will link to it so that JIM can just click on it

As I said before, I am not very computor savey, but will try, thanks for the heads up, appreciated.

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