Basic Diagnostic Procedure: Procedure

NOTE: When the sunload sensor check is performed indoors or in the shade, it could be diagnosed as sensor having an open circuit. Always perform the inspection in direct sunlight.

START INSPECTIONS .
1. Prepare the tools. Ref. to HVAC SYSTEM (HEATER, VENTILATOR AND A/C)>General Description>PREPARATION TOOL .
2. Perform the pre-inspection. Ref. to HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)>General Description>INSPECTION .
Is the check result OK?

Yes: Go to 2.

No: Fix the malfunction found in pre-inspection, and go to the next inspection step. GO to 2.
CHECK DTC .
1. Under the failure condition, leave the vehicle for one minute or more.
2. Read the DTC using Subaru Select Monitor. Ref. to HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC) .
  NOTE:
  - If the communication function of the Subaru Select Monitor cannot be executed properly, check the communication circuit. Ref. to HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)>Diagnostic Procedure for Subaru Select Monitor Communication>COMMUNICATION FOR INITIALIZING IMPOSSIBLE .
  - Record the time stamp and the freeze frame data recorded together with the DTC. For time stamp, refer to "LAN SYSTEM". Ref. to LAN SYSTEM (DIAGNOSTICS)>General Description>CAUTION>TIME STAMP .
Are any DTCs displayed?

Yes: Perform the diagnosis for the displayed DTCs. Ref. to HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)>List of Diagnostic Trouble Code (DTC)>LIST . after diagnosis, GO to 3.

No: Refer to Diagnostics with Phenomenon. Ref. to HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)>Diagnostics with Phenomenon>INSPECTION .
PERFORM DIAGNOSIS .
1. Perform the Clear Memory Mode.
2. Perform the Inspection Mode. Ref. to HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)>Inspection Mode .
Are any DTCs displayed?

Yes: Perform the diagnosis for the displayed DTCs.

No: Finish the diagnosis.