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Discussion Starter #1
Hi Guys
My BC button from the turn signal switch is not working for a while .
I opened the switch t check the wires connected t the BC buttn and they seem 100% intact . i even replaced another switch but did not help.
Fuses 9,7,41 related to onboard computer and monitor were checked.
what are the other possibilities 🤔 please that makes it inoperative.
I have the bentley manual and nothing is detailed about BC repair .
Thank you so much 💓
 

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The problem could be the cluster. Google “BMW E46 hidden OBC functions.” Test #2 exercises the gauge cluster. I don’t remember if it tests the display in the cluster. If that doesn’t work PM scottjon. He may be able to help.
 

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Discussion Starter #3
Thank you Markus
The cluster is tested and working properly.
just there is no communication between the BC button and the cluster display 🙃.
Hope to find a solution for this defect.
 

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2004 325i automagic
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Is there continuity between the BC button and the cluster display?

Use last 7 digits of vin to pull up your vehicle and look up wiring diagrams & service info at: www.newtis.info


You could check continuity between pin 1 at the turn/bc stalk connector and pin 13 at the instrument cluster X11176 harness (the 18 pin connector):

 

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Discussion Starter #6
The problem could be the cluster. Google “BMW E46 hidden OBC functions.” Test #2 exercises the gauge cluster. I don’t remember if it tests the display in the cluster. If that doesn’t work PM scottjon. He may be able to help.
 

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2002 330xi Black Sapphire
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I have a question. My BC button does not work either, but I have no clock set either, since the clock set tabs are not engaging their respective switches in the cluster. Does the clock have to be set before any on the other functions of the BC button will function? Is there any other way to set the clock, besides taking the cluster apart and physically pushing the buttons?
 

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2004 325i automagic
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I have a question. My BC button does not work either, but I have no clock set either, since the clock set tabs are not engaging their respective switches in the cluster. Does the clock have to be set before any on the other functions of the BC button will function? Is there any other way to set the clock, besides taking the cluster apart and physically pushing the buttons?
No, I don't think the clock being set or not should have any bearing on the BC button function. One of the e46s I maintian has a broken clock set button in the instrument cluster and so can't set the time, yet I recently installed a BC turn stalk which is fully functional.
 

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Ok, so you can likely rule out the cluster.
How? How, can you rule out the cluster? The cluster self test is useless for testing the BC button.

.... Is there any other way to set the clock, besides taking the cluster apart and physically pushing the buttons?
I know of no other way to set the time except through the buttons. They broke on my cluster a long long time ago so I retasked the push functionality of the time stalk from 12/24 hr switch to become time advance. This was I can change the time, but, can no longer go backwards in time or change between 12hr and 24hr modes, but, I can set the time.
 

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How? How, can you rule out the cluster? The cluster self test is useless for testing the BC button.



I know of no other way to set the time except through the buttons. They broke on my cluster a long long time ago so I retasked the push functionality of the time stalk from 12/24 hr switch to become time advance. This was I can change the time, but, can no longer go backwards in time or change between 12hr and 24hr modes, but, I can set the time.
Because he ran a successful cluster test.
 

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Because he ran a successful cluster test.
That cluster test is for testing needle drive and lights (except for backlight on older cluster, and airbag light). It DOES NOT test any of the inputs to the cluster. Why do you believe the cluster test is some comprehensive test and say it’s definitively good is it passes the test. It’s not even a test. It doesn’t say “PASS” “FAIL” at the conclusion or anything. There could be lights that are bad, malicoulously covered up or removed that if you don’t know what your looking for would miss. Stop repeatedly telling people that they should run the cluster test, it’s not a test.
 

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Scott, I’m aware that the test isolates the cluster from its input and merely tests the operation of the gauges and the light.
 

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I have a question. My BC button does not work either, but I have no clock set either, since the clock set tabs are not engaging their respective switches in the cluster. Does the clock have to be set before any on the other functions of the BC button will function? Is there any other way to set the clock, besides taking the cluster apart and physically pushing the buttons?
NO
 
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