Subaru Legacy 2002 Service Manual page 3171

DIAGNOSTICS CHART FOR DIAGNOSIS SYSTEM (LHD MODEL)
HVAC System (Auto A/C) (Diagnostics)
5. Diagnostics Chart for Diagnosis System (LHD Model)
A: SELF-DIAGNOSIS MODE
(1) Temperature select dial
(2) AUTO switch
S001647F36
(3) REC switch
(4) DEF switch
AC-28
S001647
(5) MODE switch
B4M2575A