yearrgh

I just noticed that according to the haynes book there's supposed to be wires for some kind of switch going to the lower left corner of the radiator. I'm lacking these... How bad is this, or did it get eliminated in s5

Samps

your wire goes to that little round hicky on top of the radiator. It is the coolant level sensor. The other wires must be the thermosensor which is on the water pump housing on a series 5. I have no idea how the series 4 is set up.

yearrgh

I know it's not talking about the coolant level sensor. Where on the water pump housing is the thermosensor?

banzaitoyota

lower drivers side of radiator sensor appears to be connector F-37, Water Temp Switch ( http://www.fc3s.org/how_tos/manuals/...NG_DIAGRAM.pdf ) which Detects RADIATOR coolant temperature, sends signal to ECU ( http://www.fc3s.org/how_tos/manuals/...SYSTEMS_NA.pdf )

According to page 39 of ( http://www.fc3s.org/how_tos/manuals/...SYSTEMS_NA.pdf ) Water Temperature switch is an input to the operation of the Aircontrol Valve, so if you have removed your emmissions it is not neccasary. JOhn

Samps

Looky!

yearrgh

thanks, i've got crappy dialup so it takes forever to the manuals to load. So what is happening since it's not connected and I still have all emissions?

Samps

It probably is connected. Those two wires that you are looking for at the lower part of the radiator do not exist on your car. You should be just fine.

Dragon

I would think that the computer would never think the car warmed up and would adjust fuel for the lower temp.. does you car seem to be running richer than the usual rotary does?

yearrgh

the one on the water pump housing is connected, i just didn't remember it but i just looked. I'm still concerned about the one on the radiator though

banzaitoyota

Do you have an S4 or S5?
My bad I was troubleshooting a S4 for You

banzaitoyota

Is it possible you have a S4 radiator in Your S5?

yearrgh

it's a 90tII. i'm sure it's running rich since it blackens spark plugs very quickly even when i was driving around accidently with the waste gate stuck shut for about a month.

yearrgh

how would i tell if it was s4 ?

yearrgh

i didn't see samps' anwser, if i dont have one then i guess it's not a problem for it to not be connected thanks everyone. if you really want to make me happy, tell me you have one of the solenoid valves that's above the bac valve next to the intercooler laying around. what mazda wants for it is obscene

Samps

Hehehe, a series 4 radiator will have a connection for those unknown wires of yours. But I'm a little confused. Do you HAVE the wires? Or do you HAVE the plug that the wires are supposed to hook up to? If you have the plug, but no wires, then somebody put a series 4 radiator in your T2.

yearrgh

I have neither the plug or the wires, although there is a depression in the radiator that could concievably hold some sort of sensor. I was just flipping through the book and noticed a diagram. It didn't specify that s5 was different and since i recently pulled my radiator to fix/clean the fins and didn't have the wires, i was a little concerned.

HAILERS

Only the series four uses the water temp switch on the bottom left side of the radiator. You have a series five. I think someone has put a series four radiator in your car. Don't waste time looking for the wires. They ain't thar.

This is a repeat of SAMPS above.

Turtle's TII

Don't they call this sensor the "arctic sensor", It seems I remember it being for extreme cold conditions, maybe related to the coolant cold start mix.

banzaitoyota

thats the temp sensor located on the oil pan Turtle

Samps

Is that sensor needed? I have been rewiring my car for the past few weeks and was wondering if that sensor even does anything without the cold start equipment.

banzaitoyota

I'm not installing it. In fact Rob At Pineapple sent me a pan without the bung for it, one less leak point

NZConvertible

Ah, the endless confusion over FC temperature sensors...

For the record the sensor at the bottom of the radiator is only a switch (not a variable sensor) and is part of the emission controls (3000rpm start-up I believe) on S4's only, and has no effect of fuel and ignition control or normal idling.
The two plugs that Samps has indicated in that picture are for the ECU thermosensor (very important) and the electric fan temp switch (that pic's of a S5, on a S4 the fan switch is on top of the thermostat housing).
The temp switch in the oil pan is for the sub-zero starting assist.

banzaitoyota

Exactly as I stated in my posts