2005 Mini Cooper S - No start problem - MINI Cooper Forum
Go Back   MINI Cooper Forum > MINI Technical Forums > MINI Faults & Fixes > First Generation Faults & Fixes


First Generation Faults & Fixes MINI faults and fixes 2001 - 2006

Mini2.com is the premier Mini Cooper Forum on the internet. Registered Users do not see the above ads.
Reply
Similar Threads
Thread Thread Starter Forum Replies Last Post
R56 Mini Cooper Erratic surging at idle from cold start Norfolk-Mini Second Generation Faults & Fixes 6 Mar 13th, 2014 03:12 PM
mini cooper s cold start problem njsupplies General Discussion 5 Feb 14th, 2014 10:21 AM
2014 MINI Cooper Hardtop Revealed AutoGuide.com MINI News 12 Feb 12th, 2014 02:12 PM
Please help! My car won't start & makes clicking noise... 2003 Mini Cooper Tyna General Discussion 3 Feb 1st, 2014 09:38 PM
2010 Mini Cooper S starting up problem Master_Yi Second Generation Faults & Fixes 2 Oct 19th, 2012 06:37 AM

 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old Mar 18th, 2014, 05:25 PM
MINI2 Newbie
Offline
 
Join Date: Mar 2014
Posts: 3
Local Time: 02:59 AM
United States
United-States 2005 Mini Cooper S - No start problem

Greetings everyone,

My trusty R53 has developed an electrical problem which I've been working to solve for the last few days. Unfortunately its intermittent making it all the harder to trace.

When I put the key in the ignition and turn it to on, usually I get several dash warning lights, hear the fuel pump and heater fan startup, the starter turns the engine over as normal and the car starts. Recently when I turned the key to On, I got one dash light (Door Ajar, I think) no fuel pump and no heater fan. The starter would still turn the engine, but it doesn't start. After a few tries, the fuel pump and heater fan startup, the several dash lights come on it starts as normal.

I've tried to trace the problem through the various control units and relays, but haven't been able to solve it yet.

As far as I can tell, this is not an EWS problem because the starter always turns. If I don't push the clutch pedal in, the starter doesn't turn, indicating the Body Control Module is getting the correct signals from the clutch switch and key code. Plus, all the other Body Control functions, door locks, windows etc. all work fine.

I've got the manual and the electrical diagrams, but am having some problems interpreting them. As far as I can tell, with the ignition switch on, the main relay should energize which in turn triggers several more relays, but haven't found how in the sequence the fuel pump relay is energized.

Does anyone have any ideas or can point me to a reference showing the startup sequence?

Ciao
Simon
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old Mar 19th, 2014, 01:39 PM
MINI2 Newbie
Offline
 
Join Date: Mar 2014
Posts: 3
Local Time: 02:59 AM
United States
United-States Latest findings - still not fixed

Greetings everyone,

Last night I did some more troubleshooting and went through the Bentley manual.

As far as I can tell, with the Ignition On I should have voltage to fuse F34 in the drivers (US Model) kick panel which is a wake up signal to the engine DME. For some reason I do not.

The diagrams seem to so show that F34 should be turned on by the ignition key, but K6300, the Main relay, also seems to play a role here which I don't understand. The manual also shows the fuel pump relay K96 being triggered by the DME as well, which is also not working.

With the battery disconnected I swapped relays K6300 and K19, the first two relays in the engine compartment fuse box, but that made no difference. Still no voltage to F34.

In order to simplify this, I'd like to concentrate on the Fuel Pump and fuse F34. Can someone give me an idea of how I can test the voltage to F34 or trace where it is meant to come from? It almost looks like it come directly from the Ignition key, but I'm not sure.

Thanks
Simon
Reply With Quote
  #3 (permalink)  
Old Mar 21st, 2014, 02:58 PM
MINI2 Newbie
Offline
 
Join Date: Mar 2014
Posts: 3
Local Time: 02:59 AM
United States
United-States Problem solved

Hi Folks,

My Mini is back up and running and is apparently a very happy camper. The problem ended up being the ignition switch itself. The fuse I mentioned in the previous post F34 does indeed turn on the Engine Computer, the DME, which in turn turns on the Fuel pump via a few relays. F34 is fed by the Ignition switch.

In my case, the switch contacts were dirty possibly due to the normal arcing that occurs. The odd thing was that they measured 0.1 ohms, but as soon as any current was applied, the voltage would fall to zero. This indicated that the switch could handle the tiny amount of current that a meter uses to measure resistance, but could not handle higher currents used in operation. If you search the web you'll find quite a few posts about faulty ignition switches so this seems to be a common enough problem. The issue appears to be the design of the switch. It uses a leaf spring that pushes the contacts together. A tumbler with eccentrics turns and pushes the contacts apart or allows them to touch. Since there is no wiping action between the contacts, there is no method to clean the arc pits that occur and they build up until the switch is faulty. Most other ignition switches that I've seen, use a rotary action that wipes the contacts against each other.

The solution was to disconnect the battery, take out the switch, a fairly easy process, take it apart and clean the contacts with some emery paper or similar. Put it all back together and test.

I hope this helps someone in the future who has a similar problem.

Cheers
Simon
Reply With Quote
Thanks for this post from:
Sponsored Links
Advertisement
 
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
R56 Mini Cooper Erratic surging at idle from cold start Norfolk-Mini Second Generation Faults & Fixes 6 Mar 13th, 2014 03:12 PM
mini cooper s cold start problem njsupplies General Discussion 5 Feb 14th, 2014 10:21 AM
2014 MINI Cooper Hardtop Revealed AutoGuide.com MINI News 12 Feb 12th, 2014 02:12 PM
Please help! My car won't start & makes clicking noise... 2003 Mini Cooper Tyna General Discussion 3 Feb 1st, 2014 09:38 PM
2010 Mini Cooper S starting up problem Master_Yi Second Generation Faults & Fixes 2 Oct 19th, 2012 06:37 AM

» Recent Threads
Window faulty? Help
Oct 1st, 2014 03:07 AM
Last post by Mid Life Mini
Today 04:23 AM
2 Replies, 334 Views
Window weird noise
Oct 1st, 2014 03:07 AM
Last post by m3ntal_l2
Today 03:15 AM
1 Replies, 381 Views
R50 Window Issue
Sep 27th, 2014 11:21 PM
Last post by m3ntal_l2
Today 03:13 AM
1 Replies, 381 Views
Heating Issue
Today 02:59 AM
Last post by Emonator
Today 02:59 AM
0 Replies, 40 Views
New Online Magazine for Track Day Enthusiasts
Apr 14th, 2014 12:56 AM
Last post by AutoTrackDay
Today 01:44 AM
30 Replies, 5,811 Views
Fan Stays on after Switching off Engine
Oct 17th, 2014 09:29 PM
Last post by burakace
Today 12:41 AM
3 Replies, 419 Views
PAS Fluid Leak HELP!!
Oct 15th, 2014 07:16 PM
Last post by SeanC
Yesterday 11:44 PM
8 Replies, 781 Views
MOT Advisories - Would you buy this car?
Yesterday 01:34 PM
Last post by SeanC
Yesterday 11:28 PM
2 Replies, 212 Views
Erratic engine speed when cold
Oct 19th, 2014 09:56 AM
Last post by tyred bob
Yesterday 08:37 PM
1 Replies, 314 Views
Clutch/engine problem
Yesterday 07:33 PM
Last post by jamieeccles123
Yesterday 07:33 PM
0 Replies, 106 Views
Key scratch to body work - Edinburgh
Yesterday 06:31 PM
by Dudlg0
Last post by Dudlg0
Yesterday 06:31 PM
0 Replies, 108 Views
MINI Remote Central Locking Won't Unlock
Yesterday 05:33 PM
by KrisL
Last post by KrisL
Yesterday 05:33 PM
0 Replies, 113 Views
help needed for choosing the tensioner
Yesterday 05:13 PM
by tianfa1
Last post by tianfa1
Yesterday 05:13 PM
0 Replies, 116 Views
R56 Footwell module dead
Jul 15th, 2014 04:19 AM
by miniuy
Last post by yourmate
Yesterday 04:19 PM
7 Replies, 1,386 Views
Annoying vibration in the dashboard
Feb 14th, 2012 12:38 AM
Last post by ryanharris
Yesterday 01:01 PM
8 Replies, 3,293 Views
LED Daytime running lights - retro fit
Apr 15th, 2014 06:08 PM
Last post by french01
Yesterday 12:57 PM
7 Replies, 1,501 Views
What Sat nav cd do I need?
Yesterday 11:47 AM
Last post by uk_ricky_uk
Yesterday 11:55 AM
1 Replies, 117 Views
Paint warrenty
Yesterday 10:16 AM
by Peter85
Last post by The Nun
Yesterday 11:52 AM
1 Replies, 133 Views
Drivers door actuator, fitment?
Oct 6th, 2014 05:13 PM
Last post by uk_ricky_uk
Yesterday 11:49 AM
2 Replies, 466 Views
Misfiring R55 JCW engine in 6th gear between 2k-3k RPM with throttle wide open
Oct 21st, 2014 10:30 AM
Last post by Mr Muffin
Yesterday 11:00 AM
8 Replies, 998 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 06:59 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.3.2