Turbo Cooling Pump

[Bibby]

110C?

If that's the case, then it's no wonder it's not coming on. My water temp barely ever hits 100C. Maybe I should drive a bit harder.

Cheers for the tip Porkiss, will run a search for the part you mention.

[s2avant]

I use a 90ºC LT van switch in mine. That way it runs every time I turn it off after a run but not when you've only driven down the road.

Ben

[mcnicodt]

I have a late 94 S2 Avant and I can confirm that the after-run relay J155 is in position 14 of the auxiliary relay plate under the dash on the driver's side. This piece of wisdom came my way while investigating a highly irritating fault whereby every 2 or 3 months the car won't start in the morning because the radiator fan has come on overnight and run until it flattens the battery. The fan doesn't come for at least 3 or 4hours after the engine has stopped so short of camping out in the car overnight it is difficult to catch it when the fan comes on. I've taken to carrying a 10mm ring spanner in the car to disconnect the fan when I leave the car but it's not an ideal solution!

I'm assuming there is some fault with either F98 the after-run thermoswitch or J155 the associated relay.

Anyone have any ideas?

I've also been suffering from an inoperative after-run pump (=TCP) on my ABY-engined -94 Avant with ECC. Did some troubleshooting yesterday and isolated the fault to the TCP thermoswitch.

Here are some quotes from s2central and my comments on them:

Best guess on the part number for the after-run relay is 447 965 571A - to be confirmed.

On my car the relay had exactly that part number.

Relays J26, J101 and J138 all appear to be in same location as 3B, but J155 may not be.

True, relay J155 (after-run relay) was located in position 14 (not 12) of the aux. relay carrier under the dash. Location 12 was occupied by the headlight/radio buzzer.


I guess I'll have to get myself a new thermoswitch. I have some unconfirmed information about a thermoswitch originally installed in Seats (that's the car, not what you sit on ) that should also fit the s2. This sensor is made by the spanish company FAE (part nr. FAE-3547). This switch should close and open at slightly lower temperatures than the s2 one:

FAE: close 105 deg. C, open 95 deg. C

Original S2: close 110 deg. C, open 97 deg. C

Both have a max. temp of 130 deg. C.

But this is only something I read on another forum and I have no personal experience regarding either of these sensors.