Index Subaru Subaru Impreza 3 / Impreza WRX / Impreza WRX STI - service repair manual 2008-2014 year
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AC(diag)-17 Diagnostics for A/C System Malfunction HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) C: BLOWER MOTOR TURNS AROUND EARLY TROUBLE SYMPTOM: • The blower rotates even though the blower switch is not turned on. • The blower motor continues to rotate at high speed. (Not adjustable.) WIRING DIAGRAM: Air conditioning system, auto A/C model <Ref. to WI-77, AUTO A/C MODEL, WIRING DIAGRAM, Air Con- Step Check Yes No 1 CHECK BLOWER MOTOR CIRCUIT. Connector & terminal (B57) No. 3 — Chassis ground: Is there continuity? Repair or replace 2 CHECK HARNESS. Connector & terminal (B57) No. 2 — Chassis ground: Is there continuity? Repair or replace 3 CHECK POWER TRANSISTOR. Connector & terminal (B57) No. 2 (+) — Chassis ground (–): Is the voltage approx. 10 V Replace the power B386 2 1 3 4 23 11 i1 5 6 7 8 2 1 9 4 3 10 24 22 23 25 27 26 28 11 12 13 14 15 16 17 18 19 20 21 4 3 2 1 B57 2 1 B87 12 B57 4 2 3 1 B87 9 i1 B36 B386 1 2 4 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 i88 40 i88 AC-02508 AUTO A/C CONTROL MODULE TO POWER SUPPLY CIRCUIT FB-46 F/B FUSE NO. 22 (IG) FB-8 F/B FUSE NO.27 (B) F/B FUSE NO.28 (B) BLOWER MOTOR RELAY BLOWER MOTOR POWER TRANSISTOR |