murmini - MINI Cooper Blog: There is a BUS in my MINI

There is a BUS in my MINI

murmini — Thu, 02 Nov 2006 16:23:00 -0500

Traditionally, for every electrical device in a car, the manufacturer ran a wire from a power source, via a fuse and then a switch, to the device and then to ground. When you turned the switch on and the device was energized. With the complexity of the modern car, the system soon became fraught with the possibility of failure. Advances in the computer industry have brought new technology to the automobile engineer and we are seeing more addressable network-based systems than ever before.

"There is a BUS in my MINI" by murmini

Sat, 03 Jul 2010 08:30:32 -0400

Tough to figure out what is going on. Your logic sounds fine so far. Are you confident that the key is working ok? Does it cause the ‘pinger’ to sound when you place the key near the ignition (not in it) when the door is open? I have seen some of the keys do some odd things. I had one that the battery seemed to be fine, but would only open the auto-locking system now and then, causing me to replace the key. Be interested to hear whats happens.

"There is a BUS in my MINI" by kieran. dixon@hotmail.com

Thu, 01 Jul 2010 17:16:27 -0400

I have 2002 mini the remote central locking doesn’t work (I am putting that down to a dead key) but now when I lock the door with the key it immediately unlocks itself . I have replaced both door lock and the bc1 module, but still the same . today I disconnected the k bus wire fro the bc1 module and the car will lock fine . I though it may have been getting signal from the mrs module so unpluged it but still the same . I then unpluged radio and instrument cluster to see where it is getting the signal to unlock from but still no good . what I cant understand is the auto logic is not find any faults

"There is a BUS in my MINI" by murmini

Sun, 26 Apr 2009 17:01:28 -0400

You really need to get some analysis done by either a dealer or a shop with the requisite test equipment. In this day and age it is usually more complex than a stuck relay.

"There is a BUS in my MINI" by Eric

Sun, 26 Apr 2009 14:58:20 -0400

My door handle was “zapping” me when ever I would close the door. Now the lock will not unlock with the remote key, but it will lock. Now about a week or two later the window decided to stop working. Is there a ground or a relay that I need to check? Or is this the perfect storm of things going bad in the drivers door?

"There is a BUS in my MINI" by murmini

Sun, 17 Aug 2008 17:35:17 -0400

Andrew: Sounds like something more complex is awry that will probably require connection to diagnostic equipment. You can also check if any fuses are out here.

"There is a BUS in my MINI" by murmini

Sun, 17 Aug 2008 17:33:20 -0400

John: P0136 is indicating that your Oxygen sensor (Bank 1 Sensor 2) is throwing an error code and probably should be replaced.

"There is a BUS in my MINI" by Andrew Lemonius/andylemo@hotmail.com

Thu, 14 Aug 2008 17:23:16 -0400

Hi Guys, my turn signal doesnt show on the instrument panel,no a/c radio showing,disable.Is there something I can do?

"There is a BUS in my MINI" by john.ingriselli@gerbercoburn.com

Thu, 14 Aug 2008 17:21:18 -0400

Do you know what P0136 means with gt-1 diagnostics

"There is a BUS in my MINI" by murmini

Wed, 09 Apr 2008 22:05:43 -0400

If it is an R 52 (1st generation convertible) the convenience programming is handled rough the OBD connector and talks to the General Module and would not in nay way be impacted by an aftermarket radio installation. Your dealer may have misunderstood and though that you were referring to an R 56 S (non-convertible) with the new center stack radio in which case they would have been correct.

"There is a BUS in my MINI" by Neal

Tue, 08 Apr 2008 20:31:14 -0400

Are all the convenience features (i.e. window roll down/conv.top down) that the dealer activates when requested coded through the factory installed stereo in the Mini? I installed an aftermarket audio system in my 07 Conv. S and when I requested to have the window/top roll down activated I was told it was not possible by the service department because the factory stereo how it is set up. It just seemed strange to me… Thanks in advance…

"There is a BUS in my MINI" by murmini

Mon, 11 Feb 2008 18:56:57 -0500

Thank you Chad – I knew you would have some good advice on this.

"There is a BUS in my MINI" by Chad

Mon, 11 Feb 2008 18:33:27 -0500

You can have anything in that system cause a small leak….Canister, purge valve not sealing, Gas cap, pump and or o-rings. A smoke test of the system is what I would do to try an pinpoint the leak. Sometimes the leaks are so small that it is near impossible to find and swapping out known good parts are a last resource. I have the advantage of having a GT1 on-site and can retest the system after each attempt. I know that you said that you have checked the hoses, but can you simply block them off, and recheck the system. Do you have the equipment to get the system to self-activate, or are you letting the OBD to do the test after driving cycles? One other question would be, have you had any repairs to your fuel system lately? Putting in a fuel pump or sending unit and not getting the sealing ring seated properly can cause the same thing(ask me how I know!LOL).

HTH,

Chad

"There is a BUS in my MINI" by murmini

Mon, 11 Feb 2008 15:57:47 -0500

Hmm thats a tough one! Sounds like you have the approach down and it may very well be a perished hose. Maybe Chad can ship in with some ideas.

"There is a BUS in my MINI" by ronstoys1@tds.net

Sat, 09 Feb 2008 11:12:57 -0500

I have been having my SES light come on at random with code P0442 small leak. I have checked hoses, changed gas cap, replaced fuel tank vent valve a front of engine. Now I am in the process of checking wiring from ecu to canister for voltage drops. Can you suggest anything as I going nuts. Ron

"There is a BUS in my MINI" by murmini

Thu, 01 Nov 2007 09:39:06 -0500

Not sure which model MINI you have, but it sounds like the canister purge valve or fuel system is not meeting the spec. When the fuel system is sealed a threshold is checked for a leak. The purge valve is opened and a reed switch is set as the vacuum level is reached. This switch then causes the LDP to pressurize by performing one pump stroke. If the canister purge valve is not blocked in any way, the pulse interval or cycle becomes shorter. If the canister valve is blocked or the tube pinched in any way, the pulse interval remains long, triggering an event alarm. This then tells the ECU and throws an error code. I would talk to your dealer, then see about having the system tested and maybe the canister replaced.

"There is a BUS in my MINI" by aqtauro

Thu, 01 Nov 2007 03:56:52 -0500

would just like to ask where can i find this evaporative emission system purge circuit valve?my obd resetter says that it’s open..thanks…

"There is a BUS in my MINI" by Rich

Thu, 27 Sep 2007 17:04:12 -0400

Is there anyway to recode a key from one MC (2004) to another or is there anywhere I can go to get hold of a wiring diagram. Was given spare uncut (remote) key and want to try and code it as my second key. Thanks heaps for any help. RR

"There is a BUS in my MINI" by murmini

Fri, 14 Sep 2007 09:02:43 -0400

Christopher, the complexities of the multiple inputs from the alarm sensing components such as tilt control, tailgate, door and ultrasonic sensors make this a tough one to find. The BC-1 General Module does manage the DWA Alarm system so it may even involve changing out the General Module, which is an expensive option. I am sorry that I can not be of any more help to you.

"There is a BUS in my MINI" by Christopher Surgenor

Fri, 14 Sep 2007 07:01:57 -0400

The car alarm on my 54 Mini has just started going off intermittently. It spent yesterday at my local BMW Mini main dealer undergoing diagnostic tests and they found nothing wrong. At 5am this morning, to my consternation (and that of the family and neighbours), off it went again. The garage said that if this happens again then maybe there is a wiring or management control problem and possibly an expensive remedy. Any thoughts?

"There is a BUS in my MINI" by murmini

Mon, 01 Jan 2007 17:53:48 -0500

Jen – A couple of things: Is your MINI programmed to open the windows and sunroof from the key? To find out, press the remote unlock button and hold for 5 sec – if so, there is a possibility that you have actually activated the remote by mistake and opened them. If you chose to, you can take it to the dealer to have that option turned off. If it is truly happenng randomly, then you may have to get your dealer to replace your General Module.

"There is a BUS in my MINI" by Jen

Mon, 01 Jan 2007 17:23:30 -0500

Hiya, I left my mini outside my house, came back later and the convertible roof was half down along with the windows… i don’t suppose you have any idea what could have caused this do you?

"There is a BUS in my MINI" by Matt

Thu, 02 Nov 2006 14:35:38 -0500

One of these days you will get me to be as smart as Chad! Maybe I should be a tech . . .

"There is a BUS in my MINI" by Ian C.

Wed, 01 Nov 2006 20:47:59 -0500

I really like these little pieces you put up Murray – it’s nice search material for those that want to know loads about the MINI :)