Intelligent Battery Sensor being replaced?

XtremeModder · Jan 30, 2017

So apparently my "IBS" is being replaced due to me Jeep always stating "Start/Stop not available, Battery Charging"/

This was what they said they would replace after having their tests on the battery done even with all the stuff I added into the vehicle (stereo, HID, dash cam, etc) they said that shouldn't have any major effect on my battery voltage and that they have seen this problem come up a few times already.

So, has anyone here had this part replaced? Where is that part located anyways as I would have no idea where it is?

Array · Jan 30, 2017

XtremeModder said:
....Where is that part located anyways as I would have no idea where it is?

The IBS is mounted directly on the 12 VDC battery's negative post.

Edit to add some more info:

The IBS is black and has BOSCH printed on 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.

XtremeModder · Jan 30, 2017

Array said:
The IBS is mounted directly on the 12 VDC battery's negative post.

Edit to add some more info:

The IBS is black and has BOSCH printed on 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.

Hmm, interesting.

I've had this battery charging problem for close to 3-6 months (somewhere in there) so it's had a good amount of time for the battery to charge.

But again this is apparently a widely known issue on these forums and apparently with my dealership they've had a few Jeeps back in for the same issue.

Len1304 · Jan 30, 2017

I want mine gone. I need larger and better terminal connectors and that darn sensor is a pain to work with.

Sent from my iPhone using Tapatalk

Mark_ · Jan 30, 2017

Len1304 said:
I want mine gone. I need larger and better terminal connectors and that darn sensor is a pain to work with.

You could probably install a new (bigger) negative cable with a bigger connector, then just piggyback the existing one on top of the new one to keep the sensor functionality.

Mark_ · Jan 30, 2017

I took a picture of the top of my battery last week. The cable terminals are disconnected (I was putting the battery back in, pic taken before terminals were re-attached). Negative post is in the lower left corner :

XtremeModder · Feb 21, 2017

Well it was replaced, 2-3 weeks later and I'm stuck in Battery Charging mode again.

I have a pretty good feeling now that it is the Power Magic Pro that powers my camera while the vehicle is off that is the culprit. I will be removing it and testing for a few weeks without to see what happens now.

Mark_ · Feb 21, 2017

Could very well be.

Have you considered installing a small smart charger/maintainer ? Charging overnight a few times a week might allow you to keep the Power Magic Pro thing.

WiseyD · Mar 18, 2019

I brought my car into the dealer for its MVI, while it was in there they stated they had to flash the computer due to a recall on my TrailHawk concerning the adaptive cruise control. The mechanic told me it took a few tries to get the flash to install due to some connectivity issues, not sure what that means. Afterward, on my way home from the dealer, I got the "Service stop/start system warning light". Turning the car off and back on would clear it but only for a few KMs then it would come back on again. I took it back into the dealer and they advised me that the IBS (Intelligent battery sensor) needed to be replaced. They replaced the IBS but now the start/stop won't work anymore saying "Start/Stop not available, Battery Charging". I've had over 2 hours of driving since I got my TrailHawk back from the dealer. How long does it take to charge? The battery is showing as good in the console. Am I missing something?

Mark_ · Mar 18, 2019

Hi there. You joined a couple weeks ago and had only 1 post until now, so welcome to JCC

Well... that sounds like a battery issue for sure. ESS is very, very... sensitive to battery health and state of charge. You have a 2016 with just over 72K kilometers (45K miles) so, in theroy, your battery should still be good (Canada, it's not hot enough up here and heat kills these batteries early). Having the Jeep at the dealership with the tech doing flashes with no battery charger is... hard on the battery. They likely drained it quite a bit. If you have - or have access to - a smart battery charger (even as small as a 1.5 or 2A charger/maintainer), try hooking it up overnight for a few nights ; this should help get the battery back to full charge. If you can only rely on the alternator to charge the battery, and you do mostly short stints, then it may take more than a week to regain a good charge status. If you don't get ESS back after some decent charging, then... you may need a new battery. I replaced mine at just over 70K kilometers and 3.5 years of age (I have a 2015), it was below 40% healthy adn ESS was no longer working.

Edit to add : the onboard voltage reading you get is only an indication of alternator output when the engine is running, not battery state of charge or state of health..

Intelligent Battery Sensor being replaced?

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