Charging system ?

[Kitfoxbill]

current volts 12.72 main 12.65 aux. just off the self O riles.

Sponsored

 

[sharpsicle]

I just replaced my batterys after 4 years in central Texas. Both batterys fully charged 12.7 and 12.8volts. When starting volts go to 14.2 then drop to 12.5 to 12.6 at idle . When driving it’s stays at 12.6 until i let of the gas then it climbs to 14.2. When stop gos back to 12.6 or when power applied. This is totally different from the last four years. Been doing this for about 12 day now. Is this part of smart battery system?

thanks

william

This is totally normal. Sounds like the batteries are healthy.

 

[ShadowsPapa]

current volts 12.72 main 12.65 aux. just off the self O riles.

So far, so good!

 

[cmass]

So I just picked up my Gladiator Mojave yesterday. I noticed today that mine would idle around 12.7v-12.9v and stay at 12.9v when I would accelerate. If I let off of the acceleration or applied the brake, the voltage would climb up to 14.0v-14.2v...unless I started to accelerate again or until the speedometer decreased to 15mph. As soon as it slowed to 15mph or I accelerated, the voltage would drop back down to 12.9v.

I took it back to the dealer today and we drove another Gladiator Mojave and this one stayed at 14.0v the entire time, from idle, through acceleration and deceleration back to idle... So I do not believe the issue with mine is normal cause I would expect this to happen on multiple vehicles, not just mine. Any other ideas? I have an appointment later this week so hopefully can figure it out.

 

[ShadowsPapa]

So I just picked up my Gladiator Mojave yesterday. I noticed today that mine would idle around 12.7v-12.9v and stay at 12.9v when I would accelerate. If I let off of the acceleration or applied the brake, the voltage would climb up to 14.0v-14.2v...unless I started to accelerate again or until the speedometer decreased to 15mph. As soon as it slowed to 15mph or I accelerated, the voltage would drop back down to 12.9v.

I took it back to the dealer today and we drove another Gladiator Mojave and this one stayed at 14.0v the entire time, from idle, through acceleration and deceleration back to idle... So I do not believe the issue with mine is normal cause I would expect this to happen on multiple vehicles, not just mine. Any other ideas? I have an appointment later this week so hopefully can figure it out.

Check out multiple other threads on this. It will vary with the state of the batteries and many other factors. If the other Jeep had been sitting any length of time at all, it would indeed stay up around 14 or even more.
Yours is normal, indicating the system sees fully charged batteries.
No, they will all operate differently based on the history of the battery, current state of the battery and many other factors. There is a sensor that tracks every amp hour going out and every amp hour coming in and adjust according to need.

I would bet if you put a $20 volt meter on the battery terminals when the truck was off it would read about 12.7 or similar.

 

[cmass]

Check out multiple other threads on this. It will vary with the state of the batteries and many other factors. If the other Jeep had been sitting any length of time at all, it would indeed stay up around 14 or even more.
Yours is normal, indicating the system sees fully charged batteries.
No, they will all operate differently based on the history of the battery, current state of the battery and many other factors. There is a sensor that tracks every amp hour going out and every amp hour coming in and adjust according to need.

I would bet if you put a $20 volt meter on the battery terminals when the truck was off it would read about 12.7 or similar.

Yep, I put a voltmeter on earlier and it was reading around 12.8v. Good to know!

 

[ShadowsPapa]

Yep, I put a voltmeter on earlier and it was reading around 12.8v. Good to know!

If you are still concerned (and if nothing else, so you can learn more about your Jeep!) you can periodically put a volt meter to the battery - and if it's ~12.6 or better ( ~ means 'about' or 'roughly') then it's keeping up. I mention 12.6 because if it sits a day or so, the drain from all of the systems that stay alive looking for an approaching key fob as well as other things will eventually pull the battery down a bit.
A fully charged AGM battery like these have are typically full at 12.7 - that can vary, 12.8 is a common number as well and some depends on the exact accuracy of the volt meter being used, rounding, the scale used and so on.
It sounds to me, at least based on the rough information to this point, that your Jeep is working as designed.
These are smart charging systems - charging rate is based on battery temperature (and a high air temperature, like if it's over 90 outside) will see the charging rate cut while colder temperatures - say in the lower 40s, 30s and below (F) you may see higher voltages while running because it takes more pressure (voltage is pressure) to charge a cold battery than one that is sitting at 70 degrees (F).

 

[sharpsicle]

So I just picked up my Gladiator Mojave yesterday. I noticed today that mine would idle around 12.7v-12.9v and stay at 12.9v when I would accelerate. If I let off of the acceleration or applied the brake, the voltage would climb up to 14.0v-14.2v...unless I started to accelerate again or until the speedometer decreased to 15mph. As soon as it slowed to 15mph or I accelerated, the voltage would drop back down to 12.9v.

I took it back to the dealer today and we drove another Gladiator Mojave and this one stayed at 14.0v the entire time, from idle, through acceleration and deceleration back to idle... So I do not believe the issue with mine is normal cause I would expect this to happen on multiple vehicles, not just mine. Any other ideas? I have an appointment later this week so hopefully can figure it out.

Not sure what you're trying to figure out. Yours is experiencing normal operation for a healthy battery.

The "other" Mojave you drove likely has been sitting on the lot with some parasitic draw on it, so it's trying to recharge the battery (which yours doesn't need to do). Bad reference point to use.

I wouldn't worry and would cancel the appointment unless there's a separate issue you're going in for.

 

[cmass]

Not sure what you're trying to figure out. Yours is experiencing normal operation for a healthy battery.

The "other" Mojave you drove likely has been sitting on the lot with some parasitic draw on it, so it's trying to recharge the battery (which yours doesn't need to do). Bad reference point to use.

I wouldn't worry and would cancel the appointment unless there's a separate issue you're going in for.

Was trying To figure out how the system operates (and verify that it’s normal)…since I’m not used to a vehicle with IBS, etc. Just wanted to make sure there wasn’t an issue since all of the vehicles I’ve driven always have been charging at 13.8v. But the question has been answered so I’m no longer concerned. Thanks!

 

[ShadowsPapa]

Was trying To figure out how the system operates (and verify that it’s normal)…since I’m not used to a vehicle with IBS, etc. Just wanted to make sure there wasn’t an issue since all of the vehicles I’ve driven always have been charging at 13.8v. But the question has been answered so I’m no longer concerned. Thanks!

Holy cow, another fellow who pays attention to detail and is observent - even to the point of correctly putting down a number that other systems charge at.
Over the years, depending on the year of the vehicle (battery technology changed) you will find numbers from 13.8 to about 14.2 - GM even changed their voltage regulators a time or two as batteries changed but it's always been around that number.
This guy's gonna be fine.

 

[UnforseenWeather]

I just had a P0563 high voltage code … but then it disappeared. Not sure what to make of that.

 

[ShadowsPapa]

I just had a P0563 high voltage code … but then it disappeared. Not sure what to make of that.

Just for kicks, check the battery terminal/connections at the posts (positive and negative) of the main battery. Sometimes that are not tight. If in doubt, remove, make sure things are clean and tighten them up and make sure you can't move or turn or twist them.
Loose grounds can cause problems because if the regulator (in this case, the PCM) detects low voltage due to a drop across a bad or loose connection, it will try to compensate - and result in a spike in voltage.

 

[UnforseenWeather]

Just for kicks, check the battery terminal/connections at the posts (positive and negative) of the main battery. Sometimes that are not tight. If in doubt, remove, make sure things are clean and tighten them up and make sure you can't move or turn or twist them.
Loose grounds can cause problems because if the regulator (in this case, the PCM) detects low voltage due to a drop across a bad or loose connection, it will try to compensate - and result in a spike in voltage.

I think I know what I’m doing this weekend … thanks for the tip!

 

[barryf73]

I just had a P0563 high voltage code … but then it disappeared. Not sure what to make of that.

Yesterday I did a remote start of the car and when I actually came out the car was not running.
I thought I must have made a mistake, but when starting the car, the check engine light was on.
I used Torque and a reader to read out the codes and there were 3 codes.
P0563 Powertrain System Voltage High
P0205 Powertrain Injector circuit - Cylinder 5
P2504 Powertrain Charging System Voltage High.

I called my dealership and they suggested to clear the faults and drive around to see if they come back.
So after clearing the faults the check engine light was gone.
I've been driving a couple of times since.
When reading the fault codes with Torque pro, it is still showing a current fault.
P0563 - Powertrain System Voltage High.
It also shows 3 grayed out codes, the same ones as listed above.
There is no check engine light at this time.

Any suggestions? I was thinking if the light doesn't come on to wait until next oil change.
I'm currently at about 25000km and the oil change indicator shows about 43% left.

Sponsored