Service Charging System
Thread Starter
Instructor
Joined: Jun 2012
Posts: 220
Likes: 4
From: Trophy Club Texas
Service Charging System
2007 Base 6M. I've read every tread I could find about the problems that could cause the Service Charging System DIC message. I've checked grounds, fuses, loose wires, had Autozone check the alternator, starter battery. All good. The problem seems to be intermittent and the car runs ok. Every once in a while, the car hesitates to start but it is does start. Every once in a whle, the volts drops to 11 or so driving but it goes back up. What else can I check? Thank you.
Drifting
Joined: Jun 2013
Posts: 1,269
Likes: 226
From: Cocoa FL
Check your harmonic balancer to make sure it's not spinning on the crankshaft. Check the bolt on it to see if it backed out.
Mine would intermittently throw the service charging system message as well, turned out to be the HB spinning on the crank.
Mine would intermittently throw the service charging system message as well, turned out to be the HB spinning on the crank.
Thread Starter
Instructor
Joined: Jun 2012
Posts: 220
Likes: 4
From: Trophy Club Texas
Yes, horn works. Could it be another fuse? I checked all the fuses under the hood. Could it be a fuse under the passengers floor board? I think I need to check all those.
#1 wire and alternator wire not too close.
I need to check HB too. Is that as simple as putting a ratchet on it and give it a twist? I know replacing it is a bit of a job.
#1 wire and alternator wire not too close.
I need to check HB too. Is that as simple as putting a ratchet on it and give it a twist? I know replacing it is a bit of a job.
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Burning Brakes
Joined: May 2006
Posts: 947
Likes: 5
From: Wiesbaden, Germany
I had this problem intermittently last summer as well. I checked all the grounds etc... nothing... until my dash and radio began to die on me while driving or my voltage would go way too high. So that caused me to watch my voltage religiously, and 95% of the time it held fairly steady although after a long drive it might drop to 12.8 Volts once everything was nice and hot. However, ever so often the voltage would surge alarmingly high, and I'm lucky it didn't fry my computer.
Ultimately I replaced the alternator and all is well now for the last 6 months or so.
I'd still check the cheap stuff first, but when I started getting intermittent "service charging system" notifications, it ended up being my alternator. I know you had it checked out already, but mine probably would have checked out just fine too when it wasn't surging voltage.
Luckily it is a super easy DIY.
Ultimately I replaced the alternator and all is well now for the last 6 months or so.
I'd still check the cheap stuff first, but when I started getting intermittent "service charging system" notifications, it ended up being my alternator. I know you had it checked out already, but mine probably would have checked out just fine too when it wasn't surging voltage.
Luckily it is a super easy DIY.
Last edited by Rock36; Feb 2, 2020 at 02:23 PM.
Drifting
Joined: Oct 2013
Posts: 1,495
Likes: 154
From: Somewhere Near Bakersfield California
I was about to comment that my car was doing the exact same thing. I installed headers on my car months ago (gotta remove starter for this) and then suddenly the car starting doing what yours was doing but mo ths later... so I read somewhere on this forum about the loose nut on starter solenoid, tightened it and everything has been working perfectly fine.
Intermediate
Joined: May 2021
Posts: 28
Likes: 2
From: Ormond Beach FL
I see you're dated Jan 2020. I hope you have resolved the problem by now, I recently had a similar problem. I did all the voltage drop test positive and negative side. Like you I had a machine hooked up and all things were good. One evening while trying to figure out the alternator wire route I tugged on the wire. Next time I started the motor I had battery voltage so I installed a new alt to battery wire and all is good