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Discussion Starter #1
Sorry for the detail but it might help with possible diagnosis ;)

2010 car with tracker and upgraded audio including 4 gauge power to two amps.

I bought a new exide 43ah battery back in the summer as I was getting excessive battery drain as the car is only driven at weekends and often worked on with doors open, ignition on while audio testing etc. at the same time, I bought a CTEK mxs 5.0 charger and over the last few months, it's been working well with charging fully during the week and charging working well.

Over the last few weeks I've been having an error light on the CTEK charger when reaching step 5 on the steps on the front. According to the manual, it means excessive current draw whilst charging or duff battery. I've been trying to get to the bottom of it for a while in between other work and still haven't found the problem. If I remove the fuses from the audio kit, it still won't charge, error at step 5 still. The only way I can get a full charge from the CTEK is by disconnecting the battery terminals and charging then passes step 5. Put the terminals back on and it will probably be okay again for a day or two and back to error on step 5 again.

I did a current draw check today with a multimeter in series and it was reading around 280mili amps. According to some googling, a typical draw should be nearer 20 mili amps. I wonder if that's why the CTEK is erroring at step 5. I've checked to see if its the audio equipment doing the current draw but it's not. I have a tracker but it seems that should only draw 10-20mili amps.

My next step is to get the battery checked and after that, pulling fuses individually whilst checking the current draw.

Has anyone else had problems like this. Is the CTEK just being too clever for its own good. Maybe a cheap trickle charger would do the trick which won't go into error or protection mode with 280mili amps being drawn.

Any ideas greatly appreciated. It's starting to annoy me now. I carry a jump start device in the boot just in case I get stuck anywhere although to be fair the car alternator charges perfectly.

A other thing, I have the conform lead and when I've been in a long drive or managed to get a full charge, the light in the confirm lead goes from green to orange with about 10 minutes. Another 20 minutes and its flashing red. That means voltage has dropped beneath 12.4v. When I spoke to CTEK, they said that would indicate a bad battery but it's just 4 months old and charges fine when the terminals are off and charges with the engine :runaway:
 

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Battery checked today and tested okay. CTEK doesn't seem to like 280ma draw whilst charging. I either find out what's doing it (assuming this is abnormal for the GTR) or try a different charger.

Has anyone ever measured their draw whilst all off?
Andy.

I have the 3.6A ctec charger and have no issues on a 4 year old std battery.

You must have a current drain caused by something pulling current even when off. I will try and check my current draw and let you know as soon as my back's better.

Do you have a tracker going faulty?

Satan
 

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Sorry to hijack the thread - but I am a new CTEK user. I have the CTEK 3.6 and only connected it up today. Whilst charging, is it normal for the control unit to get warm?
Also, is it advisable to leave the CTEK constantly plugged in even if the car is out of use for about a month or so???

Thanks
 

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Leave my car for a month at a time when goin offshore and never an issue starting it when I'm back
 

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Sorry to hijack the thread - but I am a new CTEK user. I have the CTEK 3.6 and only connected it up today. Whilst charging, is it normal for the control unit to get warm?
Also, is it advisable to leave the CTEK constantly plugged in even if the car is out of use for about a month or so???

Thanks
Yes and that's what they are designed for:thumbsup:
 

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Discussion Starter #7
Thanks mate. That would be helpful. I'm just not sure what the GTR normally draws so would be good to know. I suppose it just goes to show that I don't drive enough.

Tracker seems to be okay but I'm not sure how I'd know it's not.

Sympathise about your back. I'm having the same problem. :(

Andy.

I have the 3.6A ctec charger and have no issues on a 4 year old std battery.

You must have a current drain caused by something pulling current even when off. I will try and check my current draw and let you know as soon as my back's better.

Do you have a tracker going faulty?

Satan
 

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If my memory serves, a standard R35 will draw 200mA in standby.

If you've added more amplifiers for your audio install, can you check that their 12v supply is IGN only and not constant?

I dont know how accessible those amps are, but it might be worth unplugging each one in turn and seeing if any of them are drawing that extra 80mA.

I'd also suspect that a tracker unit would draw some power when the car's off, but I'd dont expect you'll find that info anywhere readily!
 

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Discussion Starter #9
Thanks Andy. Very helpful. Seems like my 280ma isn't massive then comparing it to a standard car. I've ruled out my amps by removing fuses and it didn't make any difference to the cars draw. The tracker is the only thing I have which might take a little draw and I did read around 10ma is normal for a tracker but that was a generic comment on the internet so of little worth I suppose.

Doing a little math, 200ma is 1 amp per 5 hours. That's 200 hours for 40 amps so a normal 40 amp hour battery will last around 8 days. That seems low. My last car sat in the garage for nearly 3 weeks whilst I went on holiday and started first time. That had a tracker too. Or is my maths wrong.
 

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Sorry should have been a little more precise.

Standby happens for 60 minutes after you lock the car

Quote:
"In order to prevent the battery from discharging, the battery saver system will cut off the power supply when all doors are closed, the selector lever is in the P position and the ignition switch is left in the ACC position for 60 minutes"

So, after 60 minutes after you lock your car, the battery save system should drop that 200mA down to a much lower figure which I do not know.

Maybe your CTEK is trying to charge the battery within that 60 minute window? Maybe use a timer plug to turn the CTEK unit on after that period and see what happens?
 

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Discussion Starter #11
Interesting you should say that Andy. I went out to the garage a good couple of hours after putting her away and put the charger on just as a last chance thing tonight. Not something I would normally do and it was before you mentioned this 60 min thing. Just went out and checked the charger and its still running at step 7 so you may have something there. I'll check its status in the morning and will post. I can live with that although it seems that 280ma is just over the edge that the CTEK is willing to do. I'll run a current draw check as well tomorrow after 60 mins of shut down and see what I've got drawing then.

Thanks :bowdown1:
 

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Interesting you should say that Andy. I went out to the garage a good couple of hours after putting her away and put the charger on just as a last chance thing tonight. Not something I would normally do and it was before you mentioned this 60 min thing. Just went out and checked the charger and its still running at step 7 so you may have something there. I'll check its status in the morning and will post. I can live with that although it seems that 280ma is just over the edge that the CTEK is willing to do. I'll run a current draw check as well tomorrow after 60 mins of shut down and see what I've got drawing then.

Thanks :bowdown1:
That's weird if it turns out to be the problem. I plug mine in as soon as I pull in the garage. No issues ever. Wonder if the 5.0 is too clever for it's own good? Mine is less powerful but perhaps less complicated too.

Sorry to hear you're suffering too with the back thing.

I walked backwards into a steel gate stop and the swelling has trapped a nerve. Crippled at the moment! Gutted as I'd planned to start the install of your kit.

Will try and get you a reading tomorrow if I can.

Best regards Satan.
 

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Sorry should have been a little more precise.

Standby happens for 60 minutes after you lock the car

Quote:
"In order to prevent the battery from discharging, the battery saver system will cut off the power supply when all doors are closed, the selector lever is in the P position and the ignition switch is left in the ACC position for 60 minutes"

So, after 60 minutes after you lock your car, the battery save system should drop that 200mA down to a much lower figure which I do not know.

Maybe your CTEK is trying to charge the battery within that 60 minute window? Maybe use a timer plug to turn the CTEK unit on after that period and see what happens?
CC. But surely if you get out of the car and lock it the Ign isn't left in the ACC position? Or am I confused with all the pain killers I'm on?
 

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Andy. I had a similar issue where the battery was being charged and then the next day the battery would be flat again. I've changed the battery for a new one, and since then it's been fine. You may just have a battery from a bad batch
 

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Discussion Starter #15
Andy. I had a similar issue where the battery was being charged and then the next day the battery would be flat again. I've changed the battery for a new one, and since then it's been fine. You may just have a battery from a bad batch
That's interesting. I take it you have a CTEK. Obviously I know your car well as it used to be mine and like I said above, your car sat in the garage with no charger for nearly 3 weeks (think it was 2 weeks 4 days) and it started first time. I suppose they only last so long though and I changed my current cars after 3 years old as it was misbehaving on occasions.

This battery has been back to euro car parts and has been tested on their machine and the printout said good, just needs charging. He would have swapped it but they had no stock and I said leave it as I kinda knew it wasn't the battery.

Satan - ouch, that gotta hurt. I have a long term back issue. It's actually a prolapsed disc which I've had for 18 years. If I stick to regular exercise, stretching and Pilates, it's not too much of a bother but I've not been doing that since coming back from the States in September and this bout is my punishment. Need to get back the Gym :(

Well, I poked my head in the garage and it's still on step 7 so can only assume it's been charging all night :squintdan would still be good to see what another GTRs reading is. Satan, don't stress yourself now. It can wait. If you get the surround off from around the battery at some point, it will give you incentive for your power wire install :) I noticed a nice grommet behind the battery yesterday. You won't see it until you take it out but I thought that was only on US cars but seems not :smokin:
 

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Satan, I think the ACC is a misprint in the Nissan tech docs!

I read it late last night with a stinking head cold and didn't spot that! I took as being car OFF for 60 mins
 

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Andy yes there is a grommet behind the battery. It's why some if us have had wet passenger footwells in torrential rain
 

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Discussion Starter #18
Spoke too soon. Battery hadn't charged at all over night. It just sat at step 7 over night doing nothing. Voltage was 11.7 when I checked. I noticed the comfort indicator was flashing red so I checked before I got her out of the garage. I could tell by the way it started it hadn't charged as well.

Starting to piss me off now. Had to take it for a drive for twenty minutes to get some charge in it so I could carry on with my audio work. Think I just going to buy another charger and see what it does.

Once again, on return from the drive, the indicator was green and my voltage was 12.7. Ten minutes later it was flashing orange and was 12.3 and it will shortly be red I'm sure.
 

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had very similar problems with my golf,(i know its not the same car)drove for 20 mins went shopping came out and i had a flat battery,called rac he came out and done a diagnostic check on my battery,which took 15 mins with a printout as well,he said my battery's fine, it failed me about 7 times over the course of a month,i was thinking of everything else that it could be,changed the battery 2 months ago on no problems,


simon
 

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Yes I have the ctek too. I also got the battery checked and they said it was holding the charge but one thing they can't check is if it's holding a charge when it's on the car and upto temperature. But the next day I would check the battery and it would be flat. New battery solved my issue though.
I'd see if they can swap it for you and give that a try. At least that way you can eliminate if it's a dodgy battery or not.
 
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