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Old 11-04-2016, 06:33 PM   #1
Mechanic870
 
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Question Switch.

Hi. I am new to this forum, can anybody please tell me how to fit an immobiliser switch to my 1997 sprinter 312D 2.9. 5 cylinder turbo diesel Bosch pump, motorhome. I thought about fitting it to the fuel cut off solenoid on the back of the pump, but will this affect the electronics in any way or cause any problems. Many Thanks.
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Old 11-04-2016, 06:55 PM   #2
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Default Re: Switch.

Hi Mechanic870,

I see this is your second attempt to get a reply, your first post got read 80 times but no-one replied. This may well be because not many forum members are familiar with your model.
This model was likely only sold in Europe and Australia, the USA did not get Sprinters until around 2003 so will not know what a 312D is.

Do you have a workshop manual? If not here is a link to a previous post with a scanned paper version of an older manual which may help identify a suitable location to insert your switch.

PS Where are you located?

Keith.

http://sprinter-source.com/forum/sho...334#post469334
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Sprinter reference info site http://diysprinter.co.uk/reference/
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Old 11-04-2016, 09:10 PM   #3
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Default Re: Switch.

Since your model pre-dates any information i have, i'll just ask:
(a) did Mercedes offer an immobilizer option for your Sprinter?
(b) if they did, it was probably (99%) a programming option choice to the engine control unit ... perhaps an MB dealer can still invoke that behaviour?
(if there's also a dashboard switch involved, it's quite likely that (almost) any fitting momentary-contact switch would serve)

If your Sprinter is willing to resume normal operation after running the fuel tank dry, i can't see why killing the solenoid would be any different (in the electronics' eyes)

good luck
--dick
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2005 T1N 118" Freightliner 2500 Passenger Wagon (2.7L, 15" tires, standard (short) roof)
Get YOUR Sprinter's full configuration datacard by entering your VIN to https://www.datamb.com/
http://diysprinter.co.uk/reference <-- lots of service documentation, Thanks to Jens Moller and Arnie_Oli
((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))
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Old 11-05-2016, 11:42 AM   #4
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Thumbs up Re: Switch.

Quote:
Originally Posted by Cheyenne View Post
Hi Mechanic870,

I see this is your second attempt to get a reply, your first post got read 80 times but no-one replied. This may well be because not many forum members are familiar with your model.
This model was likely only sold in Europe and Australia, the USA did not get Sprinters until around 2003 so will not know what a 312D is.

Do you have a workshop manual? If not here is a link to a previous post with a scanned paper version of an older manual which may help identify a suitable location to insert your switch.

PS Where are you located?

Keith.

http://sprinter-source.com/forum/sho...334#post469334
Thank you for your reply Keith.
I only have a Haynes type workshop manual which only gives limited information.
I am afraid the link you have sent me does not work.
I live in a village called Caister on Sea in Norfolk England.
Many Thanks. Stephen.

Finally got the link to work now thanks Keith!

Last edited by Mechanic870; 11-05-2016 at 11:49 AM.
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Old 11-05-2016, 11:55 AM   #5
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Thumbs up Re: Switch.

Quote:
Originally Posted by autostaretx View Post
Since your model pre-dates any information i have, i'll just ask:
(a) did Mercedes offer an immobilizer option for your Sprinter?
(b) if they did, it was probably (99%) a programming option choice to the engine control unit ... perhaps an MB dealer can still invoke that behaviour?
(if there's also a dashboard switch involved, it's quite likely that (almost) any fitting momentary-contact switch would serve)

If your Sprinter is willing to resume normal operation after running the fuel tank dry, i can't see why killing the solenoid would be any different (in the electronics' eyes)

good luck
--dick
Thank you for your reply Dick.
I will disconnect the fuel cut off solenoid valve wire and see if the engine starts, if it does not i will re-connect and see if it does then. It will be a simple matter of fitting a secret switch somewhere. I just did not want to upset the electronics.
Many Thanks.
Stephen.
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Old 11-05-2016, 04:24 PM   #6
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Default Re: Switch.

You might look at the manual cited by this posting, it would appear to cover your year:
http://sprinter-source.com/forum/sho...174#post500174

The manual it refers to is here: http://james-cook-freunde.de/files/j..._1995-2002.pdf
(1.5 megabytes)(how's your German?)((mine's almost non-existent))
A quick flip through the pages hints that it's really just for the "camper" portions of the James Cook, not an engine/fuel system service manual

good luck
--dick
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2005 T1N 118" Freightliner 2500 Passenger Wagon (2.7L, 15" tires, standard (short) roof)
Get YOUR Sprinter's full configuration datacard by entering your VIN to https://www.datamb.com/
http://diysprinter.co.uk/reference <-- lots of service documentation, Thanks to Jens Moller and Arnie_Oli
((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))

Last edited by autostaretx; 11-05-2016 at 04:35 PM.
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Old 11-05-2016, 04:31 PM   #7
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Default Re: Switch.

Another fairly simple approach (with a bit of testing) is to locate a circuit like that solenoid that has a known steady current draw.

Then put an in-line slow-blow fuse into the circuit, with a fuse value about half the needed current.

Your secret switch *bridges* the fuse (switch off: fuse will eventually blow. switch on: fuse is bypassed).

When you park your Sprinter, turn the switch "off".
Thief enters Sprinter, starts engine, starts to drive off .... the best delay is about 30 seconds....
There they are, out in the street... and the engine dies.

Unlike the "at the curb" situation, they're probably not going to spend a lot of time trying to work out "why?".

When you return to the Sprinter, you merely flip the switch "on" (bypassing the fuse) and drive as usual.
(back in the 1960's, the Buss Fuse company used to sell a rig like that at auto parts stores)
--dick
__________________
2005 T1N 118" Freightliner 2500 Passenger Wagon (2.7L, 15" tires, standard (short) roof)
Get YOUR Sprinter's full configuration datacard by entering your VIN to https://www.datamb.com/
http://diysprinter.co.uk/reference <-- lots of service documentation, Thanks to Jens Moller and Arnie_Oli
((as always: this post may go through a couple of post-posting edits... so maybe give it ten minutes before commenting))
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Old 11-07-2016, 10:21 AM   #8
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Thumbs up Re: Switch.

Quote:
Originally Posted by autostaretx View Post
Another fairly simple approach (with a bit of testing) is to locate a circuit like that solenoid that has a known steady current draw.

Then put an in-line slow-blow fuse into the circuit, with a fuse value about half the needed current.

Your secret switch *bridges* the fuse (switch off: fuse will eventually blow. switch on: fuse is bypassed).

When you park your Sprinter, turn the switch "off".
Thief enters Sprinter, starts engine, starts to drive off .... the best delay is about 30 seconds....
There they are, out in the street... and the engine dies.

Unlike the "at the curb" situation, they're probably not going to spend a lot of time trying to work out "why?".

When you return to the Sprinter, you merely flip the switch "on" (bypassing the fuse) and drive as usual.
(back in the 1960's, the Buss Fuse company used to sell a rig like that at auto parts stores)
--dick
Many thanks for your reply Dick.
The part about the slow burn fuse sounds a great idea, i think i will have a go at that.
Also thanks for the link to the manual, i am sure i can get it translated online.
All the best from little old England. (it's wet here at the moment lol)
Stephen.
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