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Please HELP - IMMO EEPROM Deleted


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Not a good move - programming new keys can be done in under 1 hour by any good Porsche shop with the proper Porsche diagnostic tools and your car's IPAS codes. It has been covered here many times.

If the EEPROM was not damaged then it should be able to be re-programmed using a Porsche PST2 or Porsche PIWIS - as long as an OPC/dealer can acquire your car's IPAS codes.

 

You will likely have to have the car flat-bedded to an OPC/or dealer and admit your mistake.

If the EEPROM is damaged then you are likely looking at a new alarm/immobilizer control box -- plus reprogramming time.

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Not a good move - programming new keys can be done in under 1 hour by any good Porsche shop with the proper Porsche diagnostic tools and your car's IPAS codes. It has been covered here many times.

If the EEPROM was not damaged then it should be able to be re-programmed using a Porsche PST2 or Porsche PIWIS - as long as an OPC/dealer can acquire your car's IPAS codes.

 

You will likely have to have the car flat-bedded to an OPC/or dealer and admit your mistake.

If the EEPROM is damaged then you are likely looking at a new alarm/immobilizer control box -- plus reprogramming time.

Hello Loren;

 

Thank you for your reply;

EEPROM is still working; reading and writing; but it has been deleted, so it is empty.

Do you think a dealer can reprogram the key?

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Not a good move - programming new keys can be done in under 1 hour by any good Porsche shop with the proper Porsche diagnostic tools and your car's IPAS codes. It has been covered here many times.

If the EEPROM was not damaged then it should be able to be re-programmed using a Porsche PST2 or Porsche PIWIS - as long as an OPC/dealer can acquire your car's IPAS codes.

 

You will likely have to have the car flat-bedded to an OPC/or dealer and admit your mistake.

If the EEPROM is damaged then you are likely looking at a new alarm/immobilizer control box -- plus reprogramming time.

Hello Loren;

 

Thank you for your reply;

EEPROM is still working; reading and writing; but it has been deleted, so it is empty.

Do you think a dealer can reprogram the key?

 

 

The car is programmed to accept the key, which is what Loren is referring to.

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If you wiped the old EEPROM, then you will have lost the key data.  Porsche only store the immobiliser, DME programming, and teaching codes on their IPAS system - not the key remote codes.  So you are looking at a minimum of one new key.

Had you taken it to a dealer, they would have been able to read out the key codes before changing the alarm control unit, and then written them back into the new module.

An expensive mistake, I'm afraid.

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I'm gonna dealer today and ask what can I do...

 

In addition; I found some immo-ecu sets on internet;

Keys + alarm unit m535 + ecu.
 
But m535 is for US and uses Miles;
mine is M534 and uses Kilometers.
 
And second; my car's MY is 1998;
But this car started to be sold in US with MY 1999.
 

Do you think that I can use m535 instead of m534?

 

 

If you wiped the old EEPROM, then you will have lost the key data.  Porsche only store the immobiliser, DME programming, and teaching codes on their IPAS system - not the key remote codes.  So you are looking at a minimum of one new key.

Had you taken it to a dealer, they would have been able to read out the key codes before changing the alarm control unit, and then written them back into the new module.

An expensive mistake, I'm afraid.

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M534 is the European version of the alarm module.  M535 (US) uses different radio frequencies for the remote.  If you buy second-hand units, you can change the coding of the modules using a Porsche tester to change the car model/type, but you can't change the immobiliser code.  Once the alarm module has been programmed it is permanently set.  Also, you cannot re-program the DME fuel map without the IPAS codes.  So if you buy a used alarm unit, keys, and DME set, bear in mind it will have to be from exactly the same model, and that you will never be able to add new key remotes or immobiliser pills, because you won't have the IPAS codes.

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Hello Richard and Loren;

 

I've found an used alarm control unit;

Which was belong to same model/year/part no of my car. M534 - 996 618 260 04

 

 

Do you think a dealer can reprogram this alarm module to work with my car?

Or does it must be a new control unit?

 

 

M534 is the European version of the alarm module.  M535 (US) uses different radio frequencies for the remote.  If you buy second-hand units, you can change the coding of the modules using a Porsche tester to change the car model/type, but you can't change the immobiliser code.  Once the alarm module has been programmed it is permanently set.  Also, you cannot re-program the DME fuel map without the IPAS codes.  So if you buy a used alarm unit, keys, and DME set, bear in mind it will have to be from exactly the same model, and that you will never be able to add new key remotes or immobiliser pills, because you won't have the IPAS codes.

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You can't re-program a used alarm control unit with the Porsche PIWIS tester.  Once the immobiliser code has been entered, it cannot be changed.

Do you know the VIN of the car the alarm unit has come from?  If so, a Porsche dealer MIGHT be able to get the IPAS codes for that VIN, and re-program your DME with the same immobiliser code.  It depends on knowing the VIN, and having a dealer who would co-operate.

Personally, I think you are better to get a new alarm unit fitted by a dealer.  I guess you could also ask them if they can try to re-program your (wiped) alarm unit first. 

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Hello Richard;

 

Yes I asked; but unfortunately; they were not aware what I was talking about :( 

The proposal was just to buy a new control unit with thousands of dollars :(

 

 

You can't re-program a used alarm control unit with the Porsche PIWIS tester.  Once the immobiliser code has been entered, it cannot be changed.

Do you know the VIN of the car the alarm unit has come from?  If so, a Porsche dealer MIGHT be able to get the IPAS codes for that VIN, and re-program your DME with the same immobiliser code.  It depends on knowing the VIN, and having a dealer who would co-operate.

Personally, I think you are better to get a new alarm unit fitted by a dealer.  I guess you could also ask them if they can try to re-program your (wiped) alarm unit first. 

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