Re:Gen 4 Battery swap

We have some good data and observations in this topic and more in www.bigjimny.com/index.php/forum/6-jimny...rol-off-gen-4#228222 that relate to the Battery and the Gen 4 Smart Charging System.

If someone has the time and skills (hint), It may be worth further investigation of the "OFF" Button function on the Climate Control Panel and its influence on the Battery Charging system. I believe there may be different outcomes for "touch", "long touch", "multi touch", and "hold".

I can see no reference in the service manual at all to any function in the Aircon on/off switch beyond turning the Aircon off and on.

I think it is effectively nothing more than a way of turning off and on the compressor clutch ( ok, not directly but via the controller and bcm).

The Aircon controller does take a copy of the Lim signal from the alternator/ECU but it describes it as an electrical load input probably telling the Aircon to back off if the car is overloaded.

If there was some other function I would expect the manual to say so.

The Aircon computer DOES set a DTC code if the lim signal is corrupt and flashes the AUTO light to complain

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Battery charging problems shouldn't be an issue in a modern car.
The alternator can typically deliver 60 amps which will fully charge the battery in around an hour.
Even if you only do short journeys with the lights and aircon switched on, it shouldn't be a problem.

The last time l had battery charge issues was back in 1982 when my daily driver was a 1968 Triumph Herald.

ln all the other cars l have owned, l've never had a flat battery unless said battery was at the end of its life.

There should be no necessity to faff about with the aircon buttons, or take off the battery every few weeks and charge it up.

l used to drive a small Renault Kangoo van and even on continuous short journeys in Winter with the aircon, lights, HRW, wipers and heater in constant use l never had a problem.

For almost 18 months its been my tradition to top-up the battery on Saturday, why change?

When you have a Solar Panel and a Battery and the Sun comes out:

Well it won't do any harm, but why bother? Charging your battery every weekend was a thing when cars had a dynamo back in the 1970's, and then it was only during the Winter.
Although l do have a maintenance charger for my motorcycle battery as it rarely moves between October and March, and the battery is quite small so has much less in reserve.
The last time l had a flat battery in a car was around thirty years ago.
Currently our Jimny is getting almost no use, but the battery has been fine, l connected the maintenance charger to it this morning as it's not moved since last Sunday and it's declared the battery still fully charged.

It's Saturday Morning again and FiFi, the Cat, is patiently waiting for me to move the chair into the sun and bring out the Solar Panel. Then I remembered "Lightning", he will be wondering what's happening today in The Sunburnt Country. Well, this week nothing! I'm now letting the EFB battery rest on the bench for 4 weeks to observe it's resting voltage. It will go on the 240V charger after that time. As for the Cat, she is spending the day under the table, sleeping on the chair, just like last week (see photo).
Cheers all, George.