CHECK CURRENT DATA.

1) Start the engine.

2) Read the data of mass air flow and intake air temperature sensor signal using Subaru Select Monitor.

NOTE:

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

QUESTION

Is the intake air temperature less than −40°C (−40°F) ?

Yes No

Repair the poor contact.

NOTE:

In this case, repair the following item:

• Poor contact in mass air flow and intake air temperature sensor

• Poor contact in ECM

• Poor contact of coupling connector

• Poor contact of joint connector