Subaru 2009 IMPREZA Service Manual page 2744

B: BLOWER MOTOR DOES NOT ROTATE
TROUBLE SYMPTOM:
• Blower motor does not rotate.
• Blower motor does not change speeds.
WIRING DIAGRAM:
F/B FUSE NO. 22
B87
1 2
Step
1 CHECK FUSE.
1) Remove fuse No. 22, 27 and 28 from fuse &
relay box.
2) Check the condition of fuse.
2 CHECK POWER SUPPLY OF BLOWER MO-
TOR RELAY.
1) Turn the ignition switch to OFF.
2) Remove the blower motor relay.
3) Turn the ignition switch to ON.
4) Use a tester to measure the voltage
between the terminals.
Connector & terminal
(B386) No. 2 (+) — Chassis ground (–):
Diagnostics for A/C System Malfunction
TO POWER SUPPLY CIRCUIT
FB-46 FB-8
F/B FUSE NO. 27 (B)
(IG) F/B FUSE NO. 28 (B)
BLOWER
MOTOR
RELAY
B386
BLOWER
MOTOR
B36
i1
i88 AUTO A/C CONTROL MODULE
B57
1 2
3 4
2 3 4
6
AC(diag)-15
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
POWER
TRANSISTOR
B57
B87
B36
i1
B386
1
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
5
7
Check
Is any fuse blown out?
Is the voltage 10 V or more?
i88
Yes No
Replace the fuse. Go to step 2.
Go to step 3. Repair the open
circuit of blower
motor power sup-
ply line harness.
AC-01961