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service electrical system?

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Old May 9, 2015 | 10:26 PM
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I'm getting this read out now in D.I.C.? No check engine light so no codes. It did not start this till we hooked up hp tuners. It was tuned plenty times before with hp, but made some changes in tune and this started. Any ideas?
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Old May 9, 2015 | 10:44 PM
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I know it sounds funny but check the horn fuse. It has been the source of that message before when bad.
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Old May 9, 2015 | 10:46 PM
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What was changed in the tune?

I had this or a similar message (it's been a while) when the idle would get too low and the voltage would drop down. I can't remember if it said service electrical system or service charging system, though.
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Old May 9, 2015 | 11:06 PM
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Originally Posted by RicK T
I know it sounds funny but check the horn fuse. It has been the source of that message before when bad.
Yeah, have heard that. Checked, it is good.
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Old May 9, 2015 | 11:08 PM
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Originally Posted by schpenxel
What was changed in the tune?

I had this or a similar message (it's been a while) when the idle would get too low and the voltage would drop down. I can't remember if it said service electrical system or service charging system, though.
Whole tune. Went from maf tune to speed density.
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Old May 9, 2015 | 11:54 PM
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Originally Posted by Blue by U
Whole tune. Went from maf tune to speed density.
Probably a long shot.. but is it idling the same RPM?
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Old May 10, 2015 | 10:15 AM
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Originally Posted by schpenxel
Probably a long shot.. but is it idling the same RPM?
Pretty much, maybe a tad lower.
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Old May 10, 2015 | 10:25 AM
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Originally Posted by Blue by U
Pretty much, maybe a tad lower.
Bump it back up and see what happens
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Old May 10, 2015 | 10:47 AM
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Originally Posted by schpenxel
Bump it back up and see what happens
Thanks. Will try that.
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Old May 10, 2015 | 09:55 PM
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Originally Posted by schpenxel
What was changed in the tune?

I had this or a similar message (it's been a while) when the idle would get too low and the voltage would drop down. I can't remember if it said service electrical system or service charging system, though.
I had this ALL the time drove me nuts! in traffic, backing in the drive way etc,etc. my last tune the tuners saw the fault and lowered the trip point, it a watchdog fault. nothing wrong with the charging system
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