Check With SUBARU Select Monitor

CAUTION: Before performing inspection, check whether the rear defogger operation mode setting is either in initial setting or customize setting.

CHECK BODY INTEGRATED UNIT SETTING .
1. Turn the ignition switch to ON.
2. Display the [Auto A/C Setting] data using Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR .
Do the vehicle equipment and the settings of body integrated unit match?

Yes : Go to 2.

No : From the Customize item list, select [Auto A/C Setting] and match the auto A/C ECM setting to the actual vehicle equipment. Ref. to BODY CONTROL (DIAGNOSTICS)>CUSTOMIZE .

Check the operation of the rear window defogger. Go to 2.
CHECK OPERATION OF REAR WINDOW DEFOGGER .
Check the operation with rear window defogger switch ON.
- When customize setting is set as "Continuous", it is normal if the 15-minute operation and 2-minute stop repeats.
- When customize setting is "Normal", it is normal if the operation lasts for 15 minutes and then turns OFF.
Does it operate properly?

Yes : Function is normal.

No : Go to 3.
CHECK BODY INTEGRATED UNIT OUTPUT SIGNAL .
Display the [Rr Defogger output] data using Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR .

Does the display change between [OFF]←→>[ON], when the rear window defogger switch is operated?

Yes : Check the harness and heat wire.

No : Replace the body integrated unit. Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT .