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Last Saturday I left my 93īs doors open, which resulted in the battery almost completely discharged. I tried to turn on the car, but the battery was not strong enough, so after a few tries and just listening to the tic tic tic from the relay, I stopped trying.
Since I was away from home and with no possibility of charging the battery and not even towing the car, I called a friend to make a jump start. The car started immediately and after 100 miles without problems and with the car running as usual, I got home.
As the battery had almost completely discharged but not to the point of being 100% dead, for simple curiosity I wanted to see if there were any fault codes stored. What I found was the following.
CCM: H31, 32, 33, 34, 35, 36, 37, and 38, all historic.
ECM: H16
No SYS or any kind of warning lights.
I deleted all codes and went for a 20 mile ride to see if they came back. None returned and the car always ran great.
The battery is 4 years old and until last Saturday I could leave the car for a month without using it and after all those days, it always fired immediately, so I think the battery was still healthy.
Car has only 14k miles 100% original, except for a PCMofNC chip which turns on the fans at 210°f.
Is normal that these kind of codes to appear when the battery is almost dead and you try to start a Corvette, or may be something intermitent; CCM, ECM, optispark (code 16) or whatever?
It was made like it should, but, could a jump start affect in anyway?
I'd erase all my codes and see what happens when you check it a week later. Battery could be an issue so let's wait and see and not simply throw parts at it.
Is normal that these kind of codes to appear when the battery is almost dead ..
Absolutely. You brown the computer out and it can do all kinds of weirdness. I've seen guys rip entire transmissions out over a bad alternator, tear it apart on the bench and be mystified when there's nothing wrong.
I've seen batteries and charging systems so on the cusp that they're fine till you jump in it in the winter, fire up the heater and the lights and set codes when they don't appear any other time.
Generally speaking a string of codes that appears suddenly and makes no sense (because ALL this stuff didn't fail at once, right?) is an electrical failure of some kind.
Absolutely. You brown the computer out and it can do all kinds of weirdness. I've seen guys rip entire transmissions out over a bad alternator, tear it apart on the bench and be mystified when there's nothing wrong.
I've seen batteries and charging systems so on the cusp that they're fine till you jump in it in the winter, fire up the heater and the lights and set codes when they don't appear any other time.
Generally speaking a string of codes that appears suddenly and makes no sense (because ALL this stuff didn't fail at once, right?) is an electrical failure of some kind.
thanks for the responses!
I was more concern about the codes than the battery, but I asked my buddy if he could go home and test the battery. He has the equipmet.
A few minutes ago, he called me and said my battery still has life. CCA 630 (nos sure but original were arround 650), almost 48 hours later and still holding 12.57v .After giving some load went down to 12.07 but a couple of minutes later recovered to 12.38. Not 100%, but still healthy, I think....
Alternator charging 14.8v
Surely happened what confab is telling us.
[QUOTE=pifo1964;1595639119]thanks for the responses!
I was more concern about the codes than the battery, but I asked my buddy if he could go home and test the battery. He has the equipmet.
A few minutes ago, he called me and said my battery still has life. CCA 630 (nos sure but original were arround 650), almost 48 hours later and still holding 12.57v .After giving some load went down to 12.07 but a couple of minutes later recovered to 12.38. Not 100%, but still healthy, I think....
Alternator charging 14.8v
Surely happened what confab is t
Toss the battery after three years they are all made in China! Get a Delco! If it has a means for water add and check. A battery maintainer from Napa will save your battery from the phantom voltage it incurs with battery drain
On a related note, I grabbed one of these...great piece of mind and it actually started my car with my main battery disconnected...although you're not really suppose to use it this way. It stows away neatly into the compartment behind the passenger's seat.
[QUOTE=bac22;1595682113]On a related note, I grabbed one of these...great piece of mind and it actually started my car with my main battery disconnected...although you're not really suppose to use it this way. It stows away neatly into the compartment behind the passenger's seat.
Was just looking to buy exactly the same jump starter. Thanks!
09-25-2017, 11:56 AM
Arenīt these a lot of trouble codes?
