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Auto stop/start issue
- Thread starter Jrich58
- Start date
Jrseidel
Well-known member
Mine usually does give details on why it is not ready. Cabin cooling, seat belt not buckled, etc.
I did have on one drive where it never activated and it only stated not ready. No details were provided. I did not have the AC on or anything that should have prevented it from activating. After parking and shutting it off for a bit, the next time I drove it worked fine again. Strange.
I did have on one drive where it never activated and it only stated not ready. No details were provided. I did not have the AC on or anything that should have prevented it from activating. After parking and shutting it off for a bit, the next time I drove it worked fine again. Strange.
Bobolikesjeeps
Well-known member
Not ready with no other explanation means it is charging the secondary battery. If you have been driving just around the neighborhood with lots of stops that is likely the issue. I was just about to call the dealer for the same issue but after one short 10 mile drive on the it started working again.
Hhmmm, just took a 40 min drive on the highway and still not showing ready and doesn’t work. Ugh this Jeep. Nothing but issues.
Bobolikesjeeps
Well-known member
Sorry it didn’t work. I wish I could take a 40 mile drive. Unfortunately my new Jeep has been at the dealer for the last 7 days with no end date in sight.
Oh no! What is it in for?
JeepCares
Well-known member
If you plan to visit the dealer for these concerns, please let us know. We are happy to provide support while there.
Kate
Jeep Cares
I have an appointment Friday for a list of problems, I’m trying to get them to look at this also.
Bobolikesjeeps
Well-known member
The power steering went out along with lane assist. Makes sense that they are tied together. After stopping for a few minutes everything worked after restarting the car. I’m sure it’s has more to do with electronics then a mechanical pump. The dealer is still trying to diagnose it. It doesn’t leave me very confident in this Jeep.
JeepCares
Well-known member
It’s the same for me too, it just displays stop/start not ready. I too thought it was weird that it was working but then stopped working for a few weeks. I didn’t give much thought to it thinking it must be weather or some combination of things that I’m not doing, until just now seeing your post that others having the same issue possibly
I got this issue on my gcl resolved by the dealership
Dealership notes they found no error codes, and PCM was up to date. No star online bulletin for this issue, battery connections were tight. Their scan tool showed battery state of charge was 28%. They isolated the batteries and both passed load tests.
Dealership then disconnected intelligent battery sensor for sensor to recalibrate, let it sit overnight, and now shows state of charger of 90%
So the only thing I recall was I had the star/stop turned off for a while and wondering if that messed up the battery sensor or something. I just now leave it always on, and it appears to be working again
Dealership notes they found no error codes, and PCM was up to date. No star online bulletin for this issue, battery connections were tight. Their scan tool showed battery state of charge was 28%. They isolated the batteries and both passed load tests.
Dealership then disconnected intelligent battery sensor for sensor to recalibrate, let it sit overnight, and now shows state of charger of 90%
So the only thing I recall was I had the star/stop turned off for a while and wondering if that messed up the battery sensor or something. I just now leave it always on, and it appears to be working again
Kate, the stop start has never worked on our GCL. We have taken it to the dealer 4 times and they have done nothing except charge the battery. The stop start feature worked for a day and than stopped working. They told us to drive the car more because the battery state of charge was less than 65%. We have taken a four hour long road trip and the start stop is still not available. If Jeep Cares you need to get with the dealerships and help them solve this problem we are experiencing.
I found this information on the IBS (intelligent battery sensor) on another forum interesting. Especially the part on powering up the IBS after being disconnected to recalibrate it.
The Intelligent Battery Sensor (IBS) serves to record and process measured battery variable values (current, voltage, temperature) for the vehicle power net management system. The Intelligent Battery Sensor (IBS) will calculate the Battery 'state of charge', 'state of health', and 'state of function'.
The mechanical part of the IBS is comprised of the battery clamp for the negative terminal and a captured
bolt to attach the ground cable to. The functional tasks include establishing the electrical contact between
the body and the negative battery post, housing the electronic module (actual sensor element) and the
provision of an adequate thermal contact between the sensor system temperature sensor and the negative
battery post. The mechanical part of the IBS also protects the sensitive electronic components from external influences.
The IBS is mounted directly on the 12 VDC battery's negative post. The battery post clamp nut is a captive
nut and the stud will break if the nut is removed.
The battery sensor measures, calculates and reports battery: voltage, current, temperature, state of charge
and other parameters via a LIN (Local Interconnect Network) bus to a master control module (engine controller, body controller etc). The battery sensor is used to optimize vehicle performance (maintain battery charge, fuel economy etc) via the vehicle's electrical system.
The battery sensor is readable/diagnosable via a "scan tool" that can display all of the available parameters
needed for vehicle servicing or trouble shooting.
Information the Intelligent Battery Sensor (IBS) send out on the CAN Bus is:
SOC = Battery State of Charge: Percentage the residual charge of the battery in respect to its nominal
capacity. In few words represents how much the battery is charged.
SOH = Battery State of Health: Send a percentage of the real capacity of the battery in respect to the
nominal capacity of the battery. It's so called because during the functioning, the battery is subject to
irreversible processes that reduce its capacity to be recharged and to give energy (battery ageing).
SOF = Battery State of Function: The prediction of the minimum voltage that will be reached during a
cranking phase.
When the IBS is powered up for the first time or is powered after a power disconnection, it goes into a so
called "recalibration" phase, where the IBS must recognize the type of battery and its characteristics and
state. So in this phase the tolerances on the state functions (SOC, SOF, SOH) are greater than in normal
working condition.
The Intelligent Battery Sensor (IBS) serves to record and process measured battery variable values (current, voltage, temperature) for the vehicle power net management system. The Intelligent Battery Sensor (IBS) will calculate the Battery 'state of charge', 'state of health', and 'state of function'.
The mechanical part of the IBS is comprised of the battery clamp for the negative terminal and a captured
bolt to attach the ground cable to. The functional tasks include establishing the electrical contact between
the body and the negative battery post, housing the electronic module (actual sensor element) and the
provision of an adequate thermal contact between the sensor system temperature sensor and the negative
battery post. The mechanical part of the IBS also protects the sensitive electronic components from external influences.
The IBS is mounted directly on the 12 VDC battery's negative post. The battery post clamp nut is a captive
nut and the stud will break if the nut is removed.
The battery sensor measures, calculates and reports battery: voltage, current, temperature, state of charge
and other parameters via a LIN (Local Interconnect Network) bus to a master control module (engine controller, body controller etc). The battery sensor is used to optimize vehicle performance (maintain battery charge, fuel economy etc) via the vehicle's electrical system.
The battery sensor is readable/diagnosable via a "scan tool" that can display all of the available parameters
needed for vehicle servicing or trouble shooting.
Information the Intelligent Battery Sensor (IBS) send out on the CAN Bus is:
SOC = Battery State of Charge: Percentage the residual charge of the battery in respect to its nominal
capacity. In few words represents how much the battery is charged.
SOH = Battery State of Health: Send a percentage of the real capacity of the battery in respect to the
nominal capacity of the battery. It's so called because during the functioning, the battery is subject to
irreversible processes that reduce its capacity to be recharged and to give energy (battery ageing).
SOF = Battery State of Function: The prediction of the minimum voltage that will be reached during a
cranking phase.
When the IBS is powered up for the first time or is powered after a power disconnection, it goes into a so
called "recalibration" phase, where the IBS must recognize the type of battery and its characteristics and
state. So in this phase the tolerances on the state functions (SOC, SOF, SOH) are greater than in normal
working condition.
Yes, it’s still working. I think disconnecting it resets the sensor and allows it to recalibrate
One thing to add is now I leave start/stop on all the time, so it stays calibrated. If you leave it off for a long time (like manually switch it off after every start) then it stops working altogether and needs to recalibrated
Hi Jrich58. Was the dealership able to get your start stop working. Thanks