I am from the Philippines and am currently doing the wiring on the A/C circuit. I have a 4WD 2.0 TD Townie. Just want to know if there is anybody there that knows about the pressure sensors on the A/C.
First, about the dual pressure sensors, what do they do?
Second the refrigerant pressure sensor that turns condenser fans full blast when the pressure gets too high, where is this located and could you help me out on the Toyota P/N for this?
Thank you very much for any info you share.

- (#9806) Gilbert T. Malayo, 21 Jul 03 19:14

I live in cheltenham and have owned a townace(diesel turbo cr21) since last August. A local diesel garage has had the vehicle to cure the usual pumpleak problem, and at some time after, I noticed that although both the turbo lights check O.K. on switching the ignition switch on, the turbo light is no longer operating when running. The vehicle is performing satisfactorily as far as I am aware, but on checking the oil/ water levels today, I noticed that one end of a quarter inch dia tube connected near the top of the fuel pump, running to what looks like two pressure switches by the front passenger side of the bay, had a tee piece connected and vented to open air.
It looks very much as if someone had a pressure gauge fitted after checkihg the pump maintenance work, and forgot to remove the tee-piece.
Do you think I should re-connect the pressure switch hose back to the pump directly ?
I feel that this is the reason why the turbo light is not operating, and could it have caused any real damage ?
P.S. I have not experienced any smoke emissions black or white, when driving either locally or long distance.

- (#9807) David Smith, 22 Jul 03 10:09

The other side of the "T" should be connected to the inlet manifold- there's a little spigot sticks out from the front edge of the rear inlet pipe (just under the corrugated air filter hose...)
You'll not notice any smoke with it disconnected, but you WILL notice the increased performance when it's reconnected!

- (#9808) david miller, 22 Jul 03 11:29

Thank you David,
I anticipated that such a spigot existed, because I experimented by closing off the open end. It of course had no effect, so I then removed the air cleaner cover and undid the clamp on the other end. There in front of me was the required spigot.
Its comforting to know there is a wealth of information here. Its a lovely vehicle, but potentially so much to go wrong. Thanks again.

- (#10088) David Smith, 25 Jul 03 10:55