Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[countrywoman]

Okay looks like I am stuck as chip and code NLA , will try local key person but might end up using after market ECU.

[TheBoy]

More info needed.  Most ECUs are really available 2nd hand, and if you are on about 2.5/3.0 performance chips, they are still fairly available.  If on about key transponders or fobs, loads available.

[countrywoman]

Its the immobilizer chip that I am missing but how do you get one made without the code?

[TheBoy]

Its the immobilizer chip that I am missing but how do you get one made without the code?

The transponder in the key fob?  Or the Immobiliser ECU?

[countrywoman]

The one in the key

[Doctor Gollum]

You did install the transponder ring from the donor car...

[TheBoy]

So the transponder chip (in the key) is generic. It is not programmable, but is (semi) unique.

The immobiliser ECU - the ring around the ignition key - needs to be programmed to "learn" each transponder chip in each key, up to a maximum of 5 transponders.  The security code is needed for this.

The immobiliser ECU and engine ECU are paired together with the same security code.

So you need 3 parts to make it work - Engine ECU paired to an immobiliser ECU, with 1 or more transponders learnt by the immobiliser ECU.  Simples.


Or if your donor was from a 1994 or 1995 car, you can get away with just the engine ECU, as the immobiliser was just a simple affair.

[Doctor Gollum]

Does the 2.5/3.0 have a separate immobiliser ECU then?

On the 2.6/3.2 there's the small board in the transponder ring and 3 (iirc), wires to the engine ECU.

The alarm/combined alarm immobiliser is a different system entirely and the donor plod would only ever have had the basic alarm.

[countrywoman]

96 reg (P) and it was a plod estate, can you tell the year build from chassis no 21V 1031075 ?

[countrywoman]

What I need is the security code some how as Vauxhall say they no longer have it. V looks like 97 build.

[Doctor Gollum]

Do you have the car pass?

[countrywoman]

No and only ever had one key that went walkabout.

[Doctor Gollum]

And presumably no V5...

[TheBoy]

Does the 2.5/3.0 have a separate immobiliser ECU then?

On the 2.6/3.2 there's the small board in the transponder ring and 3 (iirc), wires to the engine ECU.

The alarm/combined alarm immobiliser is a different system entirely and the donor plod would only ever have had the basic alarm.

All post 95 cars have the same setup - Engine ECU paired with immobiliser ECU (the ring around ignition), and the immobiliser ECU is programmed to learn the transponders.

Pre 95 cars have the IR immobiliser system, and I bet none work now, and all have the immobiliser relay bypassed. This is a simpler setup that means with just some wires, you can bypass it.

HTH


This is completely separate to the Central Locking/ATWS where the CL/ATWS behind kick panel is programmed to learn the key fobs, and controls just the CL/ATWS.  This system is not linked to the immobiliser system on post 95 cars (but sort of is on pre 95, due to IR element)

[TheBoy]

V is 97 MY.

Try another dealer, but most won't help without logbook.


So engine ECU, immobiliser ring and transponders from a scrappy.