CHECK CURRENT DATA.

1) Repair the short to power supply in the harness between ECM and rear oxygen sensor connector.

2) Turn the ignition switch to ON.

3) Read the data of rear oxygen sensor heater current using the 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 7 A or more?

Yes No

Replace the ECM.

END.