Subaru Impreza 2003 Service Manual page 2780

DIAGNOSTICS FOR A/C SYSTEM MALFUNCTION
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
WIRING DIAGRAM:
• FOR LHD SOHC MODEL
AIR CONDITIONING RELAY HOLDER
20A
20A
MAIN FAN
RELAY
MAIN FAN
RELAY
AIR
CONDITIONING
RELAY
COMPRESSOR
MAGNET
CLUTCH
F79 F16
F17
2 1
1 2
D:
B137
1 2 3 4
5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20
3
4
1
2
26
28
27
25
18
20
19
17
10
11
12
9
F27
PRESSURE
SWITCH
2
1
F79
F24
B:
B283
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
F27
5 6 9 13 14 17 21 22 25
1 2
7 10 15 18 23 26
3 4
8 11 12 16 19 20 24 27 28
IGNITION
SWITCH
F/B No.17
F/B No.18
F45
B62
A: B134
A:
B: B135
B:
ECM
C:
B136
D:
B137
F45
1 2 3 4 5 6 7
12 13 14 15 16 17 18 19 20 21 22 23 24
C: B136
1 2 3 4 5
29
7 8 9 10 11 12 13 14 15
30
18 19 20 21 22 23 24
AC-18
BATTERY
SBF-4 SBF-1
2
1
F17
2
1
F16
: WITH OBD
WO
: WITHOUT OBD
OO
AUTO A/C
B282
E
CONTROL
B283 MODULE
B:
B135
8 9 10 11
1 2 3
8 9 10 11 12 13 14 15
20 21 22 23
A: B134
6 1 2 3 4
16 17 9 10 11 12 13 14 15 16
25 26 24 25 26 27 28 29
MAIN FAN
MOTOR
M
SUB FAN
MOTOR
M
MODEL
MODEL
4 5 6 7
16 17 18 19
24 25 26 27 28
5 6 7 8
17 18 19 20 21 22 23
30 31 32 33 34 35
AC-00673