Author Topic: 2001 Eldorado ESC "SERVICE CHARGING SYS"  (Read 85 times)

Offline Matt CLC#18621

  • Posts: 298
  • Name: Matt Shafer
2001 Eldorado ESC "SERVICE CHARGING SYS"
« on: January 01, 2018, 02:29:10 PM »
Hello,

My ESC is making a very loud noise near all the pulleys next to the battery. The battery has died and was recharged and the car ran and the noise subsided for about 15 minutes before the battery light and message came back on. The car was driven and restarted and then went completely dead.

I'm receiving an error message stating "SERVICE CHARGING SYS" and the owners manual indicates that an electrical problem has occurred within the Power Control Module (PCM). When I check the diagnostic codes, PCM Code P1545 CADILLAC - A/C Clutch Relay Control Circuit and  ACM Code B1347 also related to A/C appears. The A/C stopped working on the hottest day in July and I did not have it serviced as of late.

Does this appear to be an alternator issue, bad battery or the A/C codes need to be addressed with the climate control?

Any guidance would be greatly appreciated.

happy New Year!

Matt CLC# 18621

Offline Eric DeVirgilis CLC# 8621

  • Posts: 4034
    • CLC Member
      CLC Member #8621
  • Name: Eric DeVirgilis
Re: 2001 Eldorado ESC "SERVICE CHARGING SYS"
« Reply #1 on: January 01, 2018, 02:44:24 PM »
Sounds to me these are two separate issues. Absence/presence of noise at the drive pulley depending on state of battery charge strongly suggest faulty alternator. Isn't there a battery voltage function in the information readout?
A Cadillac Motorcar is a Possession for Which There is no Acceptable Substitute

Offline Dave Shepherd

  • Posts: 1955
Re: 2001 Eldorado ESC "SERVICE CHARGING SYS"
« Reply #2 on: January 01, 2018, 02:50:38 PM »
Matt, get the alternator output tested,  your ac codes  are usually not related to the charging system. Of course have the battery tested too.

Offline TJ Hopland

  • Posts: 6873
Re: 2001 Eldorado ESC "SERVICE CHARGING SYS"
« Reply #3 on: January 01, 2018, 04:25:29 PM »
I would stay on the charging system too.  Other codes could just be glitches due to low voltage. 
StPaul/Mpls, MN USA

73 Eldo convert w/FiTech EFI
75 Eldo rusty but trusty
80 Eldo Diesel
And other assorted stuff I keep buying for some reason