txema

My 993 is blocked and Porsche say me that the only solution is change inmobiliser and alarm part . Really ?
Anybody can or know how I Can work for by-pass inmobilizer ?
Thanks !

Rick-A-Shay

Call these folks before going any further and see what hey have to say. They have recently advertised reworking the immobilizer to eliminate the "lockout". http://www.ecudoctors.com/

BTW, why not become a R'list member?

Bill Verburg

You only need to do 2 things
1) replace the stock chip w/ a non driveblock chip, Steve wong can supply this

2) bypass the starter relay, relay part# 964.610.184.00

fsa

My car never chimes when headlights left on, key in ignition, door opened, as do other cars.
Found reason- relay behind gas gauge absent!
Porsche wants $270!
Does anyone have one available for sale or rent? Will post on 964 Forum as well.
Thanks, Fred, Portland, OR

txema

Thank you Bill.
Let me know if I understand well the process:
1rst. If I Change the original stock chip by new Steve Wong http://www.911chips.com/993chips.html ¿ without blocktronic ?
My ECU number is 993 618 123 02.
2) bypass the starter with relay part# 964.610.184.00. OK That's easy.


I'll like to know if this chip Steve Wong work and cancel inmobilizer blocktronic ( added the by pass relay).
BTW I'm a new reenlist member, but old member in Spain http://soloporsche.com/

Gbos1

Ha! Funny you say that mine doesn't either since I purchased the car...not that I mind! Thinking the "Chime" would get on my nerves anyways!

ECU Doctors

It's possible that an Immobilizer Bypass Chip like Steve's or ours will solve your issue, but before anything it would be good to know your car's ECU #.

Because if your car has an ECU Bosch Part Number 0 261 203 674 then it is already a free running computer without drive-block, and then you know that your issue is elsewhere.

Have a quick look under the driver's seat to read the # off of the ECU, and let us know.

txema

Thanks for your response but my ECU number is 0 261 203 163 ( 993.618.123.02) .
I have a inmobilizer 993.618.959.00. ( 9 330 065 178 ) .
My car check out Porsche Factory 1994 May.
Alarm system is working and nobody know how stop it ( Porsche included ) ! So only offer as solution to change inmobilizer, alarm and 2 remote- keys... more than 2.000€.

ECU Doctors

Thanks for getting your car's data.

The ECU you have is a European "free-running" ECU; meaning it doesn't have "drive-block".

Therefore the issue that you are having (Alarm going off and not being able to turn it off) will not be solved by installing a chip in your ECU.

You have 1 of 4 issues:

- the Remote Key Fob is not EMITTING / TRANSMITTING a signal, or

- the Immobilizer Module is not RECEIVING the Key Fob's signal, or

- the Immobilizer Module is not TELLING the Alarm Module to disarm, or

- the Alarm Module is not capable of disarming by itself.

We can easily identify and fix the issue for a lot less than 2,000 Euros!

You would of course need to send your ECU Set to the USA for us to do that.

txema

Thank you so much for you diagnostic.
After install a new inmobilizer and new key fobs the 3 issues are discarded.
So, only the alarm module is not capable of disarming.
Solution ?
New alarm module ?
Yes.
Nobody know another option here...
Thanks

ECU Doctors

txema,

From your previous posts I wasn't clear that you already installed a "new" immobilizer and fobs.

Are you in fact saying that you've changed these components?

If yes, then it's possible that you need the alarm unit checked.

The wiring that goes to all of these modules can also be a factor that is preventing the immo to tell the alarm to disarm.

Could you try putting the alarm module of your car in another 993 to see if you can turn it on and off using the other car's fob?

txema

Hi,
first Porsche has changed the immobilizer and its key fobs, but the alarm was still on. If I had another 993 to have installed the alarm module we could have tried to disarm it, but since there was not, have installed a new and logically the car has started perfectly.
How is it possible that there is no other way to disarm the alarm than to replace all the blocktronic?
Thanks

ECU Doctors

In newer 993s you can disarm the alarm by putting the key in the door lock and holding it open or closed for 3 seconds.

The alarm module in your car could have been damaged and there would have been no way to disable it.

txema

I would like to thank for the help offered, thank you.
I hope it does not happen me again.
I would just like to know: if it is possible to delete function of the immobilizer and the alarm system?
What's do you think about install a Steve Wong chip with your starter relay on the ECU and leave the key fobs function to open and close the doors. Does anyone know how to do it ?
Maybe a injection cut switch hidden would be enough...and more safe.

ECU Doctors

txeme,

The installation of a chip inside of your ECU would have not helped you because your issue was in the "Alarm" unit. (I say this because from your story it seemed that after replacing this module the problem went away. Otherwise correct me if I understood the story incorrectly.)

Perhaps what you would like to see is a "Alarm module bypass." Personally we tried this once and we didn't get the results we wanted so we stopped trying.

That is because the Alarm unit, apart from allowing the starter motor to crank the engine, also has the controls that Open/Close the doors.

Also other modules depend on this system being in place in order to work correctly.

Therefore, for what you want, bypassing the alarm module would be an experimental project to undertake.