CHECK REAR OXYGEN SENSOR VOLTAGE.

1) Warm-up the engine until engine coolant temperature is above 70°C (158°F), and keep the engine speed at 3,000 rpm. (Max. 2 min.)

2) Read the voltage of rear oxygen (A/F) sensor signal using Subaru Select Monitor.

NOTE:

For MT model, depress the clutch pedal.

For detailed operation procedure, refer to “READ CURRENT DATA FOR ENGINE”.

QUESTION

Is the voltage 490 mV or more?

Yes No