System Description
| Sensor | Input Signal to ECM | ECM function | Actuator |
|---|---|---|---|
| Camshaft position sensor (PHASE) Crankshaft position sensor (POS) |
Engine speed | Air fuel ratio (A/F) sensor 1 heater control | Air fuel ratio (A/F) sensor 1 heater |
| Mass air flow sensor | Amount of intake air |
The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating condition to keep the temperature of A/F sensor 1 element at the specified range.