Toyota Corolla (E120): Engine control system

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Circuit description
The rear heated oxygen sensor is used to monitor oxygen concentration in the exhaust gas. For optimum catalytic converter operation, the air fuel mixture must be maintained near the ideal ”stoichiometric” ratio. The heated oxygen sensor output voltage changes suddenly in the vicinity of ...

Overhaul
1. Remove roof headlining assy 2. Remove sliding roof glass sub–assy  using a torx wrench (t25), remove the 4 screws the sliding roof glass.  pull the glass upward to remove it. 3. Remove sliding roof weatherstrip 4. Remove sliding roof drive gear sub–assy Notice: ...

Refueling
Opening the fuel tank cap Perform the following steps to open the fuel tank cap: Before refueling the vehicle Turn the engine switch off and ensure that all the doors and windows are closed. Confirm the type of fuel. ■Fuel tank opening for unleaded gasoline To help prevent incorrect fueling, ...