Xantia TD - ECU or not?

Unread post by **philhoward** » 09 Feb 2004, 23:50

OK, probably a daft question here, but...
The new (to me) Xantia VSX TD doesn't have the fast idle cable i'm used to, but the pump (Bosch, I think) has 2 electrical connections. ONe will be the shut-off solenoid; is the other one the ECU'able bit? There's a ECU-looking thing behind the engine bay relays (under the cover) - is this it?
If so, what's it doing on a 94 car?

Dave Burns · Unread post by **Dave Burns** » 10 Feb 2004, 00:09

No it wont have an ECU at that age, plus the ECU model has three electrical connetions to the injection pump, these being the immobiliser (black), electronic timing control (brown) and throttle lever position potentiometer (blue).
The bit you are looking at sounds like the ABS unit.
Dave

Unread post by **philhoward** » 10 Feb 2004, 00:13

Any idea what the other connection is then? It doesn't have a factory immobiliser. One connection is at the side at the bottom; the otehr one is underneath. Is there some electrical/electronic cold start enrichment(fast idle) instead of the old thermostatic cable?

Dave Burns · Unread post by **Dave Burns** » 10 Feb 2004, 00:23

Has it got a solenoid low down at the front with a small diameter steel pipe going to the top front of the pump near the fuel supply pipe.
Dave

Unread post by **philhoward** » 10 Feb 2004, 00:31

Yup...

Dave Burns · Unread post by **Dave Burns** » 10 Feb 2004, 02:56

IIRC there are also three electrical functions associated with the earlier pump, are there two connectors, if so one has three pins, two of them are for the stop solenoid, and one is for the device previously mentioned which is for canceling timing advance under certain light load conditions, the other connector has two pins and goes to a micro switch on the throttle lever.
There should still be a cable going to the cold start accelerator (fast idle) lever on the engine facing side of the pump.
Sometimes this type of pump has a different method of operating the cold start advance using the engines coolant, I've never seen it on a pump fitted to Citroen before though, its allways been a cable.
Dave