MAZDA-626-GE-Club Deutschland

I would remove Relay no 2 and 3, then go into diagnostics mode and push the throttle pedal (without turning engine on) -> Fan starts immediatelly. If not, your low speed has a problem. If it does, then it is not a low-speed problem. Remember: The fact that the fan is spinning does not tell you it i...

If it is the sensor, it has to be in a different normal position as before the change. If this isn't the case, I would say: it is not the sensor. My temperature was always in the middle. A friend has his middle point a bit to the right. But my thermostat was almost new, his wasn't. My needle never ...

Is it possible there is some air left in the cooling system?

So does this sensor trigger low speed mode directly? The needle still seems a bit too much to the right, at least from my experience with a 4-cylinder engine the normal temperature is just veeery little to the right side: https://mazda626ge.de/gallery2.php?g2_itemId=7431 Maybe someone with a V6 eng...

Update: I have now installed this new sensor, you can see the change, now the fan turns on much earlier, as in the picture: https://i.postimg.cc/Jz4dBnPH/20260611-100656.jpg While before the fan turned on here: https://i.postimg.cc/0yb0sJV3/Screenshot-20260611-102554-One-UI-Home.jpg I also noticed t...

I've now ordered that new sensor too

2 pins, thread dimensions M12x1.5, gasket comes with it

Interesting, the older GEs seem to have an additional cooling fan sensor, which was later replaced by full control via ECU and only one sensor. For these older models additionally to that failsafe: If the engine coolant sensor fails, the fan is put to permanent ON. (obviously cannot be your case) T...

If the engine coolant sensor fails, the fan is put to permanent ON. (obviously cannot be your case) So the sensor will either most likely be okay or report wrong values to the ECU. => I would recommend to start testing the relais, as it's the easiest test. (and more likely root cause?) I expect tha...

Yeah, correct, I already ruled that out: The second fan is for the air conditioning condenser. The motor cooling fan in the V6 has two fan speeds (low-speed and high-speed), while the 4-cylinder cooling fan has only one speed. So while there is no "low speed fan", there is indeed a low sp...

There are two more sensors in that location, one with one wire (for the needle on the dashboard) and another with two wires.

What is that second sensor actually for?




I put a new one on the third one.

Did you try my hint with the diagnostics mode? There is no thermostate switch for the fan. It is controlled by the ECU. I think the low-speed fan doesn't work. Maybe you have to replace the fan. If you have a multimeter, check the fan for open circuits. Are the fuses fine? I will send you the servi...

Guys, can someone tell me what exactly is the radiator fan switch/coolant fan switch and where is it located? I can't find a manual for it. I installed a new ECT coolant sensor, a cap (since the old one started leaking), a new relay, but it still turns on the fans late.

I don't think this makes any sense. You have a 0.9 filler cap and a 1.1 filler cap. First: original is only the 0.9, the second doesn't has a spring. Second: how would you get to 1.1? At 0.9 the expansion-tank valve opens and there is no room for 1.1bar so this filler cap never opens. Only if the 0...

New Filler cap 1.1 bar with spring



They say the filler cap should be 1.1 bar and 0.9 bar on the expansion tank on the radiator, for normal coolant circulation.

Can anyone tell me how to properly bleed the engine on a 2.5 V6?