2005-2014 Mustangs Discussions on the latest S197 model Mustangs from Ford.

Check Charging System

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Old Feb 5, 2012 | 11:54 AM
  #1  
X07TorchStangX
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Default Check Charging System

Hey, everyone

So earlier today I was switching my tune from an 89 to a 93. I usually keep it on a 93 tune but had to switch it back recently to an 89 because the higher octane prices were killing my wallet (my cars a daily driver) Anyway upon switching back to the 93 I had noticed I was getting a warning to "check the charging system" and then afterwords it had also said "fuel level low DTE ODO Data ERR". I thought it might have been a fluke and drove the car around for a bit and everything seemed fine. However, the warning worried me so I checked the alternator and grounding wire and everything seemed to be in place and nothing damaged. The alternator appears to be and look fairly new. I tested the lights,windows,and radio while the car was running and didn't see any drop. To double check I switched back to the 89 to see if was a fluke and it happened again. It only seems to appear while switching tunes. However, this problem never occurred before.

On friday I had replaced the coil pack as well upgrading to a screamn demon coil pack and again the car ran fine with no warnings.

Anyone have an idea what it might be? Worst case a new battery or alternator.

Thanks for the help
Old Feb 5, 2012 | 02:07 PM
  #2  
JimC's Avatar
JimC
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Are you talking about seeing those warnings during the re-flash? If so, that is normal as the hand held downloads the new data to your car.
Old Feb 5, 2012 | 02:24 PM
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Nuke
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What JimC said. But if it's occurring at other times, have the alternator and battry load tested. The charging system in the S197 is mediocre at best.
Old Feb 6, 2012 | 10:32 AM
  #4  
X07TorchStangX
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Ah I see alright thanks guys. Its odd because I have reflashed the ecu you a couple times when I had to and never really noticed the warning but it simply could have been something that I did not notice until now. I'm usually aware of things like that but I suppose it happens

And Nuke its defiantly only during the reflash I have never seen it occur at other times and had driven it before and after the reflash so I'm sure thats why it was showing the warning. Agreed though I have heard a lot of people having problems with there charging systems, between ground wires, alternators and batteries and fusees it can be a real problem

thanks for replying
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