CHECK CURRENT DATA.

1) Turn the ignition switch to OFF.

2) Repair the battery short circuit of harness between ECM and rear oxygen sensor connector.

3) Turn the ignition switch to ON.

4) Read the data of rear oxygen (A/F) sensor heater current using Subaru Select Monitor.

NOTE:

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

QUESTION

Is the current 7 A or more?

Yes No

Replace the ECM.

Finish the diagnosis.