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Old 16 Mar 2009
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Join Date: Oct 2002
Location: Stockholm - Sweden
Posts: 317
Impulsgenerator gone bust = broken ITU

Hi,


My broken ITU (impulsgenerators) are still causing me headache!
(ITU = impuls trigger unit, zündimpulsgeber, replaced the braker-point system from 1981-on /7.)

My current situation is - three (3) broken ITUs and one damage that is lent to a friend. BMW do sell new units, but 350-400EU compared with 9-10EU?! The incitement to mend the broken once is rather strong compared with buy new once -
Besides... I will need to open them anyway to install the stops that block the flyweights to about 26'( http://www.derdicke.de/mot/dz.html ) and doing so will make any warranties void... buy new parts does not sound too smart in these circumstances.

www.hallsensors.de does probably have fitting hall sensors, but... how do one place an order with them???
Art.nr. CYHME56, CYHME56L and CYHME301, http://www.chenyang-gmbh.com ,
http://www.hallsensors.de/CYHME301.pdf
http://www.hallsensors.de/CYHME56.pdf
http://www.hallsensors.de/CYHME56L.pdf


From Jaycar Electronics one can buy a hall sensor that is equivalent to Siemens HKZ 101, art.nr. ZD-1900.

www.acte.se can not supply any hall sensors.

www.honeywell.com does most likely have a hall sensor that does fit. I have checked with Honeywell sensor HQ, Denmark, and it looks like this might be the fitting hall sensor: http://sensing.honeywell.com/index.cfm?ci_id=140301&la_id=1&pr_id=150147


One retailer in Sweden for Honeywell is www.Kamic.se - they can supply No 2AV54, at a quite good price, about 108Sek/each, if one buys 1000 units i.e. ....

Farnell can deliver the Honeywell 2AV54 but does not sell to private persons. They only sell to businesses/retailers... and for us in EU there is an added import cost of the 2AV54... however Farnell presents an option to that hall sensor: http://se.farnell.com/jsp/search/altsSubs.jsp?type=alts&sku=2093844
*
Farnell suggested that I should contact, http://www.microkit.se/ , in Västerås. I ordered (2009-03-16) one HONEYWELL S&C - 2AV54 - SENSOR, HALL EFFECT, MAGNETIC from Micro Kit to test and see if it can be used. Delivery time is within a day or so - so I'll have the hall sensor within the week. Retail price is about 245,- Sek (2009-03-16).

I just got a couple of tips from Välkommen till El & Diesel Skellefteå AB that the hall sensor used in Volvo 740 looks like it could fit.
Bosch 1 231 324 221 (if I managed to get the part.no. correctly).
Retails for about 1250,- Sek (2009-03-16)
or one can get a "low cost pattern"
Facett 8 27 22
which retails for about 850,- Sek (2009-03-16)


On the Chinese manufacturing pages on internet there are several possible hall sensors presented - I have not gone further investigating which once would be most likely to fit.

Should one want to -repair- the broken hall sensor "2002", there is an example on how to do this below -


Search on Internet yesterday gave these results:

Ref from links below:
* Honeywell part No 2AV54
* Siemens part No HKZ101
* Other possible sources are from cars 79-85 VW, 78-83 Audi, or 79-82 Porsch
* I THINK the Bosch number is 1237011052


Ref: see internet search phrase: "BMW hallsensor repair"
https://www.bmwmoa.org/forum/showthread.php?p=70567
http://users.rcn.com/dehager/service/oilhead_hall_sensors.pdf
http://www.zeebulon.de/Docs/BMW_Hallsensor_Repair.pdf
http://www.deathstar.org/~flash/ig_trig.html
http://bmwmotorcycletech.info/Ignition.htm
http://www.geocities.com/fwarner_au/mc_things/bmwr_ign_sensor.html
http://www.geocities.com/fwarner_au/mc_things/hall_effect_bmw_drawing.gif
! => http://www.aarrgghh.co.uk/r80pickup/r80pickup.html
etc

What do you find on the net?
Can you find more tips/recommendations on ITU repair?
__________________
Drive Safely,
Albert

Last edited by dc lindberg; 3 Apr 2011 at 18:54.
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