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Battery not charging 2003 Deville?


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This is on my 2003 base Deville. My battery light came on and I got a "battery not charging" message during a 125 mile drive today. It was intermittent at first but now it is constant. I stopped and checked voltage with DVOM which showed the same as the information center - 11.8 volts with engine running. I'm assuming this is an alternator gone bad and I plan to buy one tomorrow for $127.99 but I wanted to ask if there is anything else (like maybe a fuse) that I should check first.
I pulled the DTC's after I got home, then cleared the codes, then started it and ran it for about 3-4 minutes, then pulled the codes again.

DTC's when I got home were:

NO ABS DATA
NO AMP CODES
NO DDM CODES
NO DDS CODES
NO DIM CODES
IPC U1000 Class 2 Communication Malfunction - CURRENT
IPC U1088 Loss of Communications with SDM - HISTORY
IPM B0419 Air Mix Door #2 Range Error - HISTORY
IPM B0429 Temperature Control #3 Rear Circuit Range/Performance - CURRENT
NO IRC CODES
NO LRD CODES
PCM P0442 Evaporative Emission (EVAP) System Small Leak Detected - HISTORY
PCM P0621 Generator L-Terminal Circuit - HISTORY
PCM P0622 Generator F-Terminal Circuit - HISTORY
PCM P0741 TCC System Stuck Off - CURRENT
PCM P1571 Traction Control Torque Request Circuit - CURRENT
PCM P1634 Ignition 1 Switch Circuit - HISTORY
PCM P1860 TCC PWM Solenoid Circuit Electrical - CURRENT
PCM U1040 Loss of Class 2 Communications with ABS - CURRENT
NO PDM CODES
RCC B1009 EEPROM Checksum Error - HISTORY
RCC U1000 Class 2 Communication Malfunction - HISTORY
RIM C0660 Level Control Exhaust Valve Circuit Malfunction - CURRENT
NO RRD CODES
SDM U1000 Class 2 Communication Malfunction - CURRENT
NO VTD CODES
_________________________
DTC's after clearing codes then running for 3-4 minutes are:

NO ABS DATA
NO AMP CODES
NO DDM CODES
NO DDS CODES
NO DIM CODES
IPC U1000 Class 2 Communication Malfunction - CURRENT
IPM B0429 Temperature Control #3 Rear Circuit Range/Performance - CURRENT
IRC U1016 Loss of Class 2 Communication with VCM - HISTORY
NO LRD CODES
PCM P0621 Generator L-Terminal Circuit - HISTORY
PCM P1571 Traction Control Torque Request Circuit - CURRENT
PCM U1040 Loss of Class 2 Communications with ABS - CURRENT
NO PDM CODES
NO RCC CODES
NO RFA CODES
RIM C0660 Level Control Exhaust Valve Circuit Malfunction - CURRENT
NO RRD CODES
SDM U1000 Class 2 Communication Malfunction - CURRENT
NO VTD CODES
__________________________________
I know this is a bunch of codes and I'm trying to save the money to buy another EBCM and replace the TCC solenoid but I'm low on money and mainly just need to get the battery charging right now. Thanks for any help!

Mike

Edited by mike5plus5
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Many of these codes.could be caused by the power issue you are having.

Typically this is an alternator problem.  

Make sure you buy an ac delco reman unit, dont buy the cheap autozone or pep boys lifetime units.  

Report back your results

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 agree with @BodybyFisher, If you plan on doing this DIY - I think the radiator has to come out and the condensor unit which means purge and charge A/C....

Someone will chime in if I'm wrong.... :) 

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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I have done this job taking the wheel well inspection cover off and the lower panel off on the bottom behind the radiator support.  

It is not necessary to remove the radiator, BUT, put a 2 by 2 foot piece of 1/4 inch plywood in front of the radiator to avoid damaging it by dropping the alternator into it.  Use a 1/2" breaker bar to relieve pressure on the tensioner to remove the serp belt.

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 replaced it today with a Delco reman unit which took me about 3 1/2 hrs, which is a little less than what the book gives according to Alldata. I've got a prosthetic left arm with a hook which doesn't have a good grip so I did remove the radiator to be safe but there was plenty of room without removing the condenser. Actually, as tight as it is in there, I would probably rather remove the radiator if I had 2 good hands . Overall it was a straight-forward job without any hard to access bolts etc. other than the bottom transmission cooling line being a little tight to get to. So I'm mobile again and happy for now. Thanks for the help everyone!

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I am impressed!, good for you!  Glad you got it fixed!

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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