1995 850 ECU's (2?) and OnBoard DTCs

[Klausc]

From the owner's manual:
The engine is equipped with a multiport fuel injection system (type LH-Jetronic 3.2 or Turbo models: Motronic 4.3)

EDIT:

And check this: http://volvospeed.com/vs_forum/topic/13 ... 70-series/



As for the thermostat, the rubber seal is all that is needed, no gasket or permatex. Before you attempt to remove the 2 T40 screws, clean the dirt out of the top of the screws. I suggest using a very good T40 bit, at least a 2 inch extension, and a 3/8 rachet. Push down very hard on the ratchet to maintain a good grip on the screw, especially the rearmost. It is easy to strip the head, so be careful.

I never found the ECT sensor difficult to access or remove. Do not let antifreeze pour over the alternator, drain a quart out of the system first.

As to the EBD ports, look for a small wire bottle brush to clean the corroded contacts. And be gentle with the probe wire, they are known to break off the probe when bent too much.

[erikv11]

When there are three ECU's the car has the Jetronic system, when there are two ECU's it is Motronic.

Really! It's true ...

Be sure to put the rubber gasket around the thermostat, not on one side or the other.