• We are conducting our first ever Lotus Emira of the Month for May 2024. This will be a monthly contest and will be submissions from users, voted for by the membership. Please take a moment to check out thread here: 🏆 May 2024 - Emira of the Month starts now! (You can dismiss this message by clicking the X in the top right hand corner of this notice.)

Fitting a battery conditioner... Do's and Don'ts

Jimblob

Emira Fanatic
Joined
Jan 22, 2022
Messages
284
Reaction score
840
Location
UK
Battery conditioner fitted... and it's thrown up an error Light on dash!

2nd mod fitted ;-) if you can call it that! I'm claiming it!

I fitted a CTEK battery charger today . It needed M8 sized connectors to connect to the battery - which i had. I added some additional duct tape to the cable and the shroud just in case there is any rubbing. I will probably cut a very small neat recess in the shroud with my Dremel later on for a neater finish.

The charger lights up perfectly and all looks to be working perfectly.... one problem, after installation an error light has been thrown up on the dash saying "12V Battery needs service".

I'm thinking this is due to me disconnecting the battery as i fitted the connectors. Does anyone have experience with this on other Lotus's? I'm hoping that it will clear itself after a while... could I use an ODB reader to clear the code? Does an Emira even have this port? If so any idea where?

If none of the above I'm sure the dealer would some work seeing as they've not had much to do for months!
Thanks


IMG_0689 (1).jpeg
 
OP
J

Jimblob

Emira Fanatic
Joined
Jan 22, 2022
Messages
284
Reaction score
840
Location
UK
  • Thread Starter
  • Thread starter
  • #2
I spoke to Lotus and they are now investigating as they themselves advise that people fit a trickle charger / battery conditioner if you leave you can un-driven for any period of time….

I’ve also purchased an ODB reader to see if I can clear the code myself.
 

TomE

Moderator
Staff member
Joined
Aug 10, 2021
Messages
6,427
Reaction score
14,643
Location
Surrey, UK
Emira Status
Emira on order
Useful info, thanks!

On the Evora, if you disconnected the battery too soon after turning off the ignition then it would confuse the ECU and throw an airbag warning light when you re-connected. The ECU needs time to settle after the ignition is turned off, so the car needs to be left for 15-30 minutes before disconnecting the battery. It needed the right type of ODB reader or a visit to the dealer to reset the airbag light.

This issue sounds like it could be similar.
 

Markc

Emira Fan
Joined
Sep 22, 2021
Messages
199
Reaction score
299
Location
York uk
Battery conditioner fitted... and it's thrown up an error Light on dash!

2nd mod fitted ;-) if you can call it that! I'm claiming it!

I fitted a CTEK battery charger today . It needed M8 sized connectors to connect to the battery - which i had. I added some additional duct tape to the cable and the shroud just in case there is any rubbing. I will probably cut a very small neat recess in the shroud with my Dremel later on for a neater finish.

The charger lights up perfectly and all looks to be working perfectly.... one problem, after installation an error light has been thrown up on the dash saying "12V Battery needs service".

I'm thinking this is due to me disconnecting the battery as i fitted the connectors. Does anyone have experience with this on other Lotus's? I'm hoping that it will clear itself after a while... could I use an ODB reader to clear the code? Does an Emira even have this port? If so any idea where?

If none of the above I'm sure the dealer would some work seeing as they've not had much to do for months!
Thanks


View attachment 20967
Schmee is due to fit one to his Emira. His team maybe able to shed some light?
 

CDM1855

Emira Fiend
Joined
Dec 12, 2021
Messages
623
Reaction score
612
Location
Hong Kong/UK
Do we know what’s the longest you can leave the car without driving it, before the battery dies
 

hml_xy

Emira Fan
Joined
Oct 26, 2022
Messages
203
Reaction score
799
Location
Germany
Emira Status
Emira Owner
When disconnecting the battery on my Evora GT430 nothing happens when you switch it back on. But I have to say that the Emira is on a way other level when it comes to monitoring of the car.

@CDM1855 My guess is 4 weeks should be possible. On my Evora (with the small/light Li-Ion battery) I was ok for about two weeks. But it was probably shortened by the tracker I have installed which doesn't get good GSM in the underground garage.
So my assumption is based on the capacity of the Emira battery being higher than the one in the Evora.
 

TomE

Moderator
Staff member
Joined
Aug 10, 2021
Messages
6,427
Reaction score
14,643
Location
Surrey, UK
Emira Status
Emira on order
When disconnecting the battery on my Evora GT430 nothing happens when you switch it back on. But I have to say that the Emira is on a way other level when it comes to monitoring of the car.

@CDM1855 My guess is 4 weeks should be possible. On my Evora (with the small/light Li-Ion battery) I was ok for about two weeks. But it was probably shortened by the tracker I have installed which doesn't get good GSM in the underground garage.
So my assumption is based on the capacity of the Emira battery being higher than the one in the Evora.
My Evora with a standard lead acid battery will last 2 weeks but not 3.
 

scoates

Emira Fan
Joined
Sep 29, 2021
Messages
237
Reaction score
673
Location
Scotland
Emira Status
Emira Owner
My Emira hasn't moved for 5 weeks and no charger attached to it. I'll give it a check today to see if it starts and get the trickle on it for a day or two to give it a top up.
 

scoates

Emira Fan
Joined
Sep 29, 2021
Messages
237
Reaction score
673
Location
Scotland
Emira Status
Emira Owner
Went to check on it, unlocked without issue, all systems started properly and not even a hesitation when starting the engine! Also took the opportunity to confirm that you can start the car in Sport or Track by holding the start button with no pedals pressed for 5 seconds. Left the charger off for now, think it would easily last a few more weeks.
 
OP
J

Jimblob

Emira Fanatic
Joined
Jan 22, 2022
Messages
284
Reaction score
840
Location
UK
  • Thread Starter
  • Thread starter
  • #14
Pics of the battery charger connections for reference if anyone needs to know how there’s will fit…

4780294D-CF4D-4507-A3CC-A6714A721E5C.jpeg
 

Attachments

  • 3C77EE47-B1E7-450D-9161-A9F0741F4A27.jpeg
    3C77EE47-B1E7-450D-9161-A9F0741F4A27.jpeg
    241.6 KB · Views: 377
  • 7F64AC22-1091-4051-AF37-01A8ED2C096E.jpeg
    7F64AC22-1091-4051-AF37-01A8ED2C096E.jpeg
    198.9 KB · Views: 383

FlyNavy01

Emira Fanatic
Joined
Jan 14, 2022
Messages
304
Reaction score
656
Location
WA/FL
Emira Status
Emira Owner
I know Porsche recommends that the negative lead be attached to the body rather than the battery post to avoid problems with the battery management computer. In fact, there’s a big sticker warning about this right next to the battery. If you can find an unused threaded hole in the battery compartment somewhere that may help alleviate the problem.
 
OP
J

Jimblob

Emira Fanatic
Joined
Jan 22, 2022
Messages
284
Reaction score
840
Location
UK
  • Thread Starter
  • Thread starter
  • #16
I know Porsche recommends that the negative lead be attached to the body rather than the battery post to avoid problems with the battery management computer. In fact, there’s a big sticker warning about this right next to the battery. If you can find an unused threaded hole in the battery compartment somewhere that may help alleviate the problem.
Thx for the suggestion.

I’m going to leave it alone with the charger disconnected untill tomorrow when my ODB reader arrives. I’ll then try to clear the code… then if that works I can see if turning on the charger throws up the warning light again.

I’ll report back tomorrow.
 

Pugwash

Emira Fiend
Joined
Jan 22, 2022
Messages
610
Reaction score
1,320
Location
South Bucks, UK
Emira Status
Emira Owner
Thanks @Jimblob. Useful pictures. Not seen a bus bar on a battery like that before.
Did the nuts come off cleanly or were they semi-captive (ie not designed to easily come off?
Did you fully disconnect the battery when doing this?
The unit attached to the earth looks like the one on my Jaguar which I think is the battery condition sensor. It tells me if the battery is low. Perhaps that got disconnected and that’s what is throwing the error code?
IIRC the Jaguar guys told me to try and avoid disconnecting this when I fitted the CTEK fly lead but if I did the error code would clear itself after a number of start stops (once the system had enough clean starts). When I fitted the fly lead I popped the nut off but kept pressure on the leads so everything else is was still connected as I did it. No issue.
Not sure my Evora was as intelligent as that and I don’t recall the battery having all that extra hardware attached when I attached the fly lead.
 
  • Like
Reactions: AGP
OP
J

Jimblob

Emira Fanatic
Joined
Jan 22, 2022
Messages
284
Reaction score
840
Location
UK
  • Thread Starter
  • Thread starter
  • #18
Thanks @Jimblob. Useful pictures. Not seen a bus bar on a battery like that before.
Did the nuts come off cleanly or were they semi-captive (ie not designed to easily come off?
Did you fully disconnect the battery when doing this?
The unit attached to the earth looks like the one on my Jaguar which I think is the battery condition sensor. It tells me if the battery is low. Perhaps that got disconnected and that’s what is throwing the error code?
IIRC the Jaguar guys told me to try and avoid disconnecting this when I fitted the CTEK fly lead but if I did the error code would clear itself after a number of start stops (once the system had enough clean starts). When I fitted the fly lead I popped the nut off but kept pressure on the leads so everything else is was still connected as I did it. No issue.
Not sure my Evora was as intelligent as that and I don’t recall the battery having all that extra hardware attached when I attached the fly lead.
I fully disconnected the negative terminal first - I thought that was good practise (maybe not though!).

The reason I did that was that I wanted to connect the negative terminal to the actual negative battery terminal.

I tried to do that but the bolt that clamps onto the terminal is captive at both ends so I had nowhere to put my circular connector. That’s why I connected to the bolt where I did…

I was aware that there was “something” between that and the negative terminal - I guess that’s the conditioning serape you mention.

I’ve started and run the car 3 times since I fitted it so let’s see what happens tomorrow. Fingers crossed. Also I will get my ODB reader tomorrow which may help - although I’ve never used one before… can’t be that hard!
 

Pugwash

Emira Fiend
Joined
Jan 22, 2022
Messages
610
Reaction score
1,320
Location
South Bucks, UK
Emira Status
Emira Owner
Useful info, thanks!

On the Evora, if you disconnected the battery too soon after turning off the ignition then it would confuse the ECU and throw an airbag warning light when you re-connected. The ECU needs time to settle after the ignition is turned off, so the car needs to be left for 15-30 minutes before disconnecting the battery. It needed the right type of ODB reader or a visit to the dealer to reset the airbag light.

This issue sounds like it could be similar.
Emira manual does say wait 30 mins after switching off before disconnecting the battery.
 
OP
J

Jimblob

Emira Fanatic
Joined
Jan 22, 2022
Messages
284
Reaction score
840
Location
UK
  • Thread Starter
  • Thread starter
  • #20
It had been switched off overnight before I connected it… and I don’t think I turned it on at all before I did the work… Or maybe I did inadvertently 🤔
 

Similar threads

Aerie Performance Lotus Emira Carbon Fiber Parts GregsRaceParts.com

Latest posts

Top