Battery Charge / Stop-Start - Jeep Renegade Forum
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post #1 of 4 (permalink) Old 03-16-2017, 05:08 PM Thread Starter
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Question Battery Charge / Stop-Start

Have noticed recently that the stop-start hasn't been cutting in on my Jeep.

On the new Jeep Skills app on uConnect, I happened to notice that the Battery state is hovering around the 65 to 70% level - and the charge rate is almost always non-existent.

I drive 50 miles a day, at a steady cross-country speed - not stuck in traffic, so I would expect the battery to be given a good charge each day.

I was wondering if the Jeep Skills app was reliable, and if so, would this explain why the stop-start wasn't working - i.e. the battery is not fully charging?
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1.6 Limited, 2wd 120HP in Colorado Red, Two-tone wheels and Panoramic Sunroof plus packs for Infotainment, Visibility, Towing and Function Pack 2
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post #2 of 4 (permalink) Old 03-17-2017, 04:27 PM
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Ok I hadn't driven for a few days (5) and I took a look at mine.

After starting (and about 2 min sat on the driveway trying to work out what speaker has died in the jeep) here is what mine was showing:


And this was shown on the voltage I think about 10 miles:

Li
The display showed between 5 and 7A, it was about 15 deg C today (the Jeep temperature sensor is a lying useless thing - it is in the wing mirror so ignore that 20 deg C it had been in the sun.

On other days when climate is working or I have the lights on the current can swing from - to + and by quite a lot. Today it sat at anywhere between 4 and 7A.

The battery percentage went up to about 78% and the voltage was at 14.4V.

Edited to add Ive never seen the battery show such low % on the app. Is yours a diesel or petrol? The diesel battery may be larger....
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post #3 of 4 (permalink) Old 03-18-2017, 08:05 PM Thread Starter
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Thanks for checking Ridders - my charging voltage on the main panel is also showing 14 Volts...

I've got the 1.6 Diesel - but never checked the battery level until the Jeep Skills app let me!

Diagnostically, I've disconnected every extra drain item (Dashcam, phone charger etc) but it makes no difference to the charge rate.

Today the Battery charge was showing 62% - but on the way home from my drive today, the charge current was varying from 1A up to a fully-deflected positive reading (something like 20A !?!), and then back down again - and the final battery charge reading was 65% after a 10 mile drive.

I've spoken with Jeep Leicester, and they've booked it in to check - but not until 3rd April, so I've got to keep my eye on it for a while. If it drops below 50% - I'll take it in directly.

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post #4 of 4 (permalink) Old 03-20-2017, 05:40 PM
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Originally Posted by Julian Osborne View Post
Today the Battery charge was showing 62% - but on the way home from my drive today, the charge current was varying from 1A up to a fully-deflected positive reading (something like 20A !?!), and then back down again - and the final battery charge reading was 65% after a 10 mile drive.
ive certainly seen some significant Amps shown going both ways and the cycling back to low Amps in the past (both positive and negative) with lights and climate on working the compressor so I wouldn't worry about that.

It could well be your battery capacity being down, so the system doesn't want to kill the engine as it thinks the battery is below a certain level.
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