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.

Step	Check	Yes	No
1 START INSPECTIONS. Prepare the tools. Refer to PREPARATION TOOL , General Description. Perform the pre-inspection. Refer to INSPECTION , General Description.	Is any malfunction found in pre-inspection?	Fix the malfunction found in pre-inspection, and go to the next inspection step. Go to step 2 .	Go to step 2 .
2 PREPARE SUBARU SELECT MONITOR. Prepare the Subaru Select Monitor.	Is the Subaru Select Monitor ready?	Go to step 3.	Go to step 4 .
3 CHECK DTC. Under the failure condition, leave the vehicle for one minute or more. Read the DTC using Subaru Select Monitor. NOTE: If the communication function of the Subaru Select Monitor cannot be executed properly, check the communication circuit. Refer to COMMUNICATION FOR INITIALIZING IMPOSSIBLE , Diagnostic Procedure for Subaru Select Monitor Communication. Record the freeze frame data recorded together with the DTC.	Is DTC displayed?	Refer to LIST , List of Diagnostic Trouble Code (DTC).	Refer to Diagnostics with Phenomenon. Refer to INSPECTION , Diagnostics with Phenomenon.
4 A/C CONTROL PANEL SELF-DIAGNOSIS. Under the failure condition, leave the vehicle for one minute or more. Perform the self-diagnosis of A/C control panel. Refer to OPERATION , Diagnostic Chart for Self-Diagnosis.	Are other codes except "20" displayed?	Refer to SENSOR CHECK TABLE , OPERATION, Diagnostic Chart for Self-Diagnosis.	Refer to Diagnostics with Phenomenon. Refer to INSPECTION , Diagnostics with Phenomenon.