CHECK FRONT OXYGEN (A/F) SENSOR HEATER CURRENT.

1) Turn the ignition switch to OFF.

2) Repair the battery short circuit of harness between ECM and front oxygen (A/F) sensor connector.

3) Turn the ignition switch to ON.

4) Read the data of front 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 2.3 A or more?

Yes No

Replace the ECM.

Finish the diagnosis.