Hallo,

can anyone tell me on what sensor conditions the honda ecu decides to make open loop or closed loop?

i think mainly throttle position and MAP is responsible for this, maybe a bit the rpm too but i think thats not much.

i wan't to know: at xx% throttle the ecu runs Openloop or at xx mbar MAP the ecu runs Openloop or simething

Thanks
Malte.

 

Ziemlich klein die Welt :-)
Hoffe du bist wegen dem Stecker nicht sauer?

 

english? since this is an americam forum and all.

 

From what I understand, the coolant temp sensor for the ECU decides the open closed loop opperation when you first start the car. After its warmed up, its in closed loop reading from the o2 sensor. When you floor the car and it sees a WOT from the TPS, the ECU reads a preset map and ignores the 02 sensor. As far as I know, open/closed loop only applies to the temp of the engine and it reads preset maps when its floored. Under normal driving it uses the o2 sensor to calculate the cleanest A/F ratio for the environment.