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Discussion Starter #1
okay, the seemingly neverending saga continues today...
my husband had the car towed home, bought an ecu out of a wreck and set about working on the car.
he cleaned up the connections on the harness and set out driving around with the original ecu.
he started the car and it worked fine, then the tachometer dropped to zero, the abs light, traction control light and airbag light all came on. the oil light came on intermittently.
he changed out the ecu for the one he bought and even though the motor fires up, the car turns itself off with the light for the locked code coming on.
any advice???

the car was perfectly fine sunday night when i last drove it, but i guess once that one tiny pin went on the connection the car has become a pandora's box.
 

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180 Degrees out of faze
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841 Posts
Sounds like the immobilizer has control of the car. Do you have Vag-Com? In most cases you have to adapt the ECU to the car first.
 

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Discussion Starter #3
no, we don't have vag com.

i'm so tired of this car now, why can't it just be as easy as fixing the part, putting it back in and it works?
 

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Beetle Cup racer
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567 Posts
Dont despair, I know these problems get on your nerves, but the new ecu has a diferent "code" for the radio, and the keys and on top of that to identify your car, its called the inmobilizer. Its designed to make it dificult to steal or to change serial numbers etc in case of someone getting a copy of your key.

You have to take the car to a stealership aor someone with vag com and read the codes on the new ECU and do 2 things (either) defeat the inmobilizer or reprogram your replacement ecu with the codes for your car (keys, radio and such)

I know the revo, and unitronic chipping guys have an inmobilizer defeat, they can do it also...
 

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Yep. It's the immobilizer that's keeping your used ECU from working. It needs hooked up to a computer and adapted.

Hmm. I doubt it; but MAYBE you can bribe someone from the VW dealership to come to the house and do it? (4 pizzas and 2 2litre's for the service crew?) Their tool *IS* mobile; (if it's battery is working right).

Or check the vag-com locator sources to see if you can find someone in your area with one.

http://newbeetle.org/forums/showthread.php?p=3998
http://www.frappr.com/vagcomlocator
http://www.steve-hall.com/cgi-bin/VAG-Locator.pl
http://www20.brinkster.com/beowulf9/tdi/vagcom/
 

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Discussion Starter #6
thanks for the input!

my husband realized that the new ecu had to be programmed for my car so he put the old ecu in.

today he ran the car for an hour without any lights coming on and then let it sit for another hour to cool off. when he went back to the car the abs light came on and was flickering.

can anyone advise on this? it's such a bizarre thing that's going on with the car.
i love the car and want to keep it since i've only had it for four months.
i'm strongly considering buying the vagcom software for my husband for xmas if fixing the car is such a regular occurance.
i don't know that he'd like it for a gift, but i don't exactly like the idea of donating money to vw on a regular basis via diagnosis.

does anyone have any idea what's going on with my car?
i'm feeling really sorry for my husband who has been monkeying around with the car and has the manual permanently balanced on his knee.
 

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I dunno, but it sounds like that man deserves a cake! :)

ABS Of course I'd say it sounds like a loose sensor connection, but hell if I'd know in your particular case. :) Flashing lights may well be part of the smoke your husband trapped in the ECU case. ;)
 
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