I'm running the stock ecu and I noticed that my fan doesn't work.
When I ground 1R (R/G) at the ECU, the fan comes on, so that entire circuit is ok.
My temp sensor is giving me about 1K at 25°C and 100ohm when the car has been driven (temp gauge at 12), so the sensor is OK.
I checked continuity on the wires from the temp sensor to the ECU (B/R in 3F and R/L in 2E) suggesting that circuit is fine as well.
I checked B/R and it's a good ground.
So, if the fan still doesn't come on, I can only assume that the ecu is faulty? Or could there still be something else?
I shorted 2E to 3F and the fan still didn't come in. Shouldn't 0 ohm immediately turn the fan on?
Assuming my ecu is indeed faulty, can anyone point me to a circuit I can use? I'd hook it up to the stock sensor so that at x ohm, the fan turns on (with some hysteresis in the circuit).