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| Author | Subject: Flat battery changed but now won't start! Key fob not workin |
 gb_gti6
Regular  Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #1
My battery went flat so I took it off and charged it, now after putting it back on the car won't start just turns over. The key fob is also not working after changing the battery. Both car battery and fob battery are fine Any ideas!! Thanks ________________________________________ Team OCD |
 Posted 14th Mar 2012 at 20:39
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #2
Check the fuses under the steering wheel. I reckon one of the 5A ones has gone.Does your interior light also not work? If so, it's deffo a fuse.  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone  |
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Posted 14th Mar 2012 at 20:40
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gb_gti6
Regular Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #3
Checked fuses, and the interior light does work still________________________________________ Team OCD |
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Posted 14th Mar 2012 at 21:04
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #4
Ok, does the fuel pump prime when you turn the ignition on?________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 14th Mar 2012 at 22:38
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gb_gti6
Regular Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #5
Sure it did but will double check the morning, what you thinking?________________________________________ Team OCD |
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Posted 14th Mar 2012 at 22:49
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #6
Maybe you have dislodged the fuel pump relay when removing the battery as the relay is connected to the battery box. The other thing to try is press the fuel cut off switch in the engine bay (big red button at the rear of the bay near the passenger top suspension mount). It could be when you removed the battery you knocked this and because it is an inertia switch it killed the fuel supply to the rail.________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 14th Mar 2012 at 22:54
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gb_gti6
Regular Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #7
It's not the fuel cut off switch I have already tried that but haven't looked at the relay where abouts is that? I have been trying to narrow it down as I normally quite good but this has got me and is starting to get annoying! Thanks though.________________________________________ Team OCD |
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Posted 14th Mar 2012 at 22:58
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #8
No problem.The relay bolts to the back of the battery box with an 8mm nut. If your fuel pump primes though this won't be at fault. So, your next step is to check if the fuel pump primes. If it does, you need to see if its fuel or spark you're not getting. I suspect its spark you're lacking, and thats possibly because the ECU hasn't been unlocked as your keyfob isn't working. Have you got another key to try? ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 14th Mar 2012 at 23:03
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gb_gti6
Regular Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #9
Yeah I know the relay you mean now, I have only got one key and the fob worked fine before! Surely you can change a battery without needing a unlocked ecu lol. Had this prob with another one I had but that didn't turn over or anything but was sorted the minute I changed the ecu.________________________________________ Team OCD |
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Posted 14th Mar 2012 at 23:07
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #10
Yes, the ECU should be fine. I was just asking in case you could try another key and eliminate that from questioning.So, its finding fuel or spark problems. One culprit could be the crank sensor. These have a tendancy to just randomly fail completely without warning which is rather annoying. When you say your key fob doesn't work anymore can you still lock and unlock the car by turning the key in the doors? And if so, does the central locking operate properly when you do this? ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 14th Mar 2012 at 23:14
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gb_gti6
Regular Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #11
Funny you ask that it would appear the key is different to the door lock as though the ignition barrell has been changed maybe which I wasn't aware of when I bought it. The key only works in the ignition, doesn't work with door locks or glovebox which I only found out earlier!________________________________________ Team OCD |
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Posted 14th Mar 2012 at 23:17
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #12
You need to check for a spark tomorrow when its light. I am pretty sure you are going to find you don't have one.IF this is the case then my next step would be to disconnect the crank sensor and check its resistance to see if this component has failed. However, for some reason, the fault thats going round my head is that you've got an immobiliser issue which is killing the spark. ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 14th Mar 2012 at 23:24
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gb_gti6
Regular Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #13
I think you maybe right after previous happenings. Everything was ok until the battery went flat, so if it is a immobiliser problem then the easiest way to sort would be to get an unlocked ecu? Or any other way?I never seem to have time at the minute to do much! ________________________________________ Team OCD |
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Posted 14th Mar 2012 at 23:30
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #14
If it is the immobiliser you could get an unlocked ECU although yours should be able to be sorted out. Check to see if the fuel pump primes first, then we can go from there.  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 14th Mar 2012 at 23:38
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gb_gti6
Regular Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #15
Ok will do thanks, will let you know________________________________________ Team OCD |
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Posted 14th Mar 2012 at 23:40
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #16
No problem mate, keep me informed.  ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 14th Mar 2012 at 23:42
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #17
Any update on this? Have you checked on the fuel pump priming?________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 15th Mar 2012 at 10:41
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gb_gti6
Regular Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #18
Hi, I have checked and fuel pump is defo priming and the relay was fine!!________________________________________ Team OCD |
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Posted 15th Mar 2012 at 19:05
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #19
I'm pretty confident in saying thats an immobiliser issue, and for that reason you're getting no spark. If you sit in the car with the doors closed and press the driver's door lock pin down does the central locking activate, or does it only lock the door the door which you have pressed? ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 15th Mar 2012 at 21:44
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gb_gti6
Regular Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #20
I am sure it is aswell I had this issue with both I have owned can't understand why this happens!!It just locks the one door. ________________________________________ Team OCD |
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Posted 15th Mar 2012 at 21:51
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #21
Have you definitely checked ALL the fuses under that steering wheel?There is a 5A fuse there that runs the central locking AND the immobiliser. My guess is that it has blown and that is why neither appear to be working... ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 15th Mar 2012 at 21:53
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gb_gti6
Regular Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #22
I can check again but I am pretty sure they all fine, I could maybe try another one in it to rule it out completely but have checked!! Fuse 6 if I am right? ________________________________________ Team OCD |
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Posted 15th Mar 2012 at 22:15
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #23
I can't remember the fuse number off the top of my head, but it sounds about right...How did you check the fuse? If it was just a case of pull it out and visually check, sometimes they don't blow in such an obvious way. This is why it is better to get a multimeter and check across the pins of the fuse for continuity. That way you know for sure whether the fuse is good or not. Or alternatively, with the ignition on, check if you have 12v at one side of the fuse and then if you have, see if you've got it at the other side of the fuse relative to Earth. ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 15th Mar 2012 at 22:20
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stan_306gti6
Forum Admin Location: Kent Registered: 18 Jan 2004 Posts: 21,768 Status: Offline |
Post #24
My thinking behind this theory is that it has been known for these fuses to not like being connected to a full battery once they have been disconnected from power, and hence they can blow.The fact that the central locking AND the immobiliser has packed up makes sense as they are on the same circuit. And the weak part of that circuit is the fuse. ________________________________________ "Supercharged - 454.1bhp/317.5lb/ft"Peugeot 306 GTi-6 2000 (X), Moonstone |
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Posted 15th Mar 2012 at 22:22
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gb_gti6
Regular Location: spalding Registered: 04 Feb 2010 Posts: 425 Status: Offline |
Post #25
I just did a visual check if I am honest, have a stack of fuses so I will try that and will try with multimeter if that fails and then go from there!!Is there an easy fix without buying an unlocked ECU if it this? ________________________________________ Team OCD |
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Posted 15th Mar 2012 at 22:24
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