Sidekick 4 Door 4WD L4-1.8L DOHC MFI 16V (1996)
Oxygen Sensor: Description and Operation
O2 Sensor Heater Control System
This system controls operation (ON/OFF) of the heater which assists activation of the oxygen sensor. ECM turns the HO2S-1 heater ON (to allow
the electric current to flow to the oxygen sensor heater) when the engine is running without high-load and high-speed condition, and turns the
HO2S-2 heater ON after the vehicle ran with specified load and specified time.
