CHECK CURRENT DATA.

1) Start the engine.

2) Read the data of front oxygen (A/F) sensor heater current using Subaru Select Monitor or general scan tool.

NOTE:

• Subaru Select Monitor

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

• General scan tool

For detailed operation procedure, refer to the general scan tool operation manual.

QUESTION

Is the current 0.2 A or more?

Yes No

Repair the poor contact of connector.

NOTE:

In this case, repair the following item:

• Poor contact in front oxygen (A/F) sensor connector

• Poor contact in ECM connector