Xantia ECU transplant, immobilizer workaround

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ManicMiner
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Xantia ECU transplant, immobilizer workaround

Post by ManicMiner »

Hi

I've been away from my Xantias for 14 months, and upon arriving home I realize that I have forgotten the immobilizer code for one of them.

I have three Xantias, and one of them is a donor, and as luck would have it, I can remember the code for it. The idea I have, should my memory not return to form, is to replace the ECU in the car, with the one from the donor car. But before I do so, I have a couple of questions.

1. Is the immobilizer code stored in the ECU, or is there some other part I have to switch over?
2. All my Xantias are Serie 1. Would I need to change anything but the ECU?
3. Last but not least, where is the ECU located?

Thomas
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Re: Xantia ECU transplant, immobilizer workaround

Post by xantia_v6 »

For a petrol engine Xantia, (or a 2.1TD) the code is stored in the engine ECU which is in the box behind the RH headlamp. For a 1.9 diesel engine, the code is stored in the diesel pump.

To interchange the ECU, the donor and recipient must have the same model of engine (and generally speaking) the part number on the ECUs should match.

For a 1.9 TD engine, the normal thing to do is to de-armour the pump and remove the immobiliser (but not an easy task).
ManicMiner
Posts: 2
Joined: 21 Aug 2019, 21:17
Location: Norway
My Cars: 94 Xantia 1,9TD
95 Xantia 1,9TD
95 Xantia 1,9TD
02 Hilux D4D
12 C250CDI 4Matic

Re: Xantia ECU transplant, immobilizer workaround

Post by ManicMiner »

Thans for a swift answer. It is a 1.9TD, so interchanging the ECU would not help?

De armouring the pump, basically just removing the shield and supplying 12v to the solenoid, like in this video?

Last edited by myglaren on 21 Aug 2019, 23:05, edited 1 time in total.
Reason: YouTube link
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