2006 charging problem - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 06-19-2015, 08:31 PM Thread Starter
 
Join Date: Jun 2013
Posts: 164
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
2006 charging problem

I am getting all kinds of check alt messages, abs error and air bag lights. New battery so I am thinking about replacing the alternator but what chance could it be the ECM.
johnfin is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 06-20-2015, 08:51 AM
Former Moderator
 
svede1212's Avatar
 
Join Date: Oct 2005
Location: Grand Rapids, Michigan
Posts: 4,081
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 25 Post(s)
Garage
Run the idle about 1,000 RPM and check your voltage at the battery. You should be near 14 volts. If it's closer to 12V your charging system isn't working correctly and then it could be the alternator. The ECM (engine control module) does not play into it.

2004 Blk/Rd M6
6.3 litre LS1

Built and tuned by svede
svede1212 is offline  
post #3 of 8 (permalink) Old 06-20-2015, 09:12 PM Thread Starter
 
Join Date: Jun 2013
Posts: 164
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
2006 models have the voltage regulators as a part of the ECM, 2004 models dont, hence yes there could be a problem with the emc on mine. just dont know how common it is to go out. Would suck if it was the ecm
johnfin is offline  
 
post #4 of 8 (permalink) Old 06-21-2015, 11:41 AM
Former Moderator
 
svede1212's Avatar
 
Join Date: Oct 2005
Location: Grand Rapids, Michigan
Posts: 4,081
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 25 Post(s)
Garage
I stand corrected. Another reason to hate LS2s. I would still start with checking voltages. Check out post #15 here

Starting/Charging System testing (shade tree friendly) - LS1GTO.com Forums

2004 Blk/Rd M6
6.3 litre LS1

Built and tuned by svede
svede1212 is offline  
post #5 of 8 (permalink) Old 06-21-2015, 04:18 PM
 
HP11's Avatar
 
Join Date: Apr 2009
Location: San Bernardino, Ca.
Posts: 2,603
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
I also stand corrected and also deleted the post that contained the misinformation. I took that quote directly from the GM Service Info site. I guess I would have found out when and if I had an alternator/regulator problem. Something I haven't yet experienced the joy of on my 2005. But rather than the ECM, Fox Mulder says that the field control is done by the PCM.

2005 Pontaic GTO - CGM 6 Speed (My car)
2017 Chevrolet Colorado 2WT (My daily driver)
2010 Mercedes Benz C300 Sedan (Wife's car)
2014 Kia Rio LX (Wife's daily driver)
HP11 is offline  
post #6 of 8 (permalink) Old 06-25-2015, 12:49 PM
 
Join Date: Jun 2013
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I'm currently having issues with mine as well. Random ABS fault/ loss of gauges, very sporadic. Come to find out when this all happens my voltage spikes to 17.2 volts, and verified at the battery terminals with a DMM. Alternator issue or crazy computer issue? Over the last two days this happened, the only time I was able to keep it under some sort of control was to run all accessories while driving it home. Also battery appears to be spewing water from overvoltage. Battery is one year old.
Space is offline  
post #7 of 8 (permalink) Old 10-10-2015, 10:35 AM
 
Join Date: Jun 2013
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Nothing worse than a dead thread of unresolved issues so.....
I took my alternator out and took it into the rebuilder. He told me he couldn't find a replacement part for the alternator for the voltage control. I said I thought it was computer controlled. He says yeah, but there is still some regulator on the alternator itself to receive instruction from the computer. He bench tested it and couldn't find anything wrong. I went ahead and replaced the alternator with a new OEM one from rockauto for 200 bucks. So far, so good. Have not had a single issue yet, been a week. There still may be an underlying cause I'm unaware of yet, but it does seem to have fixed it so far. It was a pain to get the alternator out and back in. Yes, you do have to take off the power steering pump and disconnect the hard line going to the pump. Also the fan on the right side will have to have the bolts taken out and move the fan about as you wrestle with the long bolt coming out of the alternator. Topped off power steering fluid, filled and burped the coolant, and all is well. It actually went pretty smooth, and only took a couple of hours taking my time.
Space is offline  
post #8 of 8 (permalink) Old 12-11-2016, 05:59 PM
 
Grambo427's Avatar
 
Join Date: Jan 2013
Location: Bailey, NC
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
you can just pull the ps return hose and fanagle the alternator out that way, without taking the pump and hard line off. did have to move the fan shroud and wrestle with that around the upper rad hose.
Grambo427 is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 2004-2006 GTO > Service, Maintenance and Technical Discussion

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
2006 gto ac problem Bossin Service, Maintenance and Technical Discussion 24 07-27-2017 12:25 AM
2006 GTO Cooling Problem GoatDad Service, Maintenance and Technical Discussion 6 04-20-2012 11:24 PM
Alternater not charging xconcepts 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 5 08-06-2010 04:21 PM
Charging Problem e_zrider 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 9 05-21-2010 11:28 AM
charging problem? PhantomGTO Service, Maintenance and Technical Discussion 5 07-11-2005 09:40 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome