Subaru Impreza 2003 Service Manual page 2781

DIAGNOSTICS FOR A/C SYSTEM MALFUNCTION
WIRING DIAGRAM:
• FOR RHD SOHC MODEL
AIR CONDITIONING RELAY HOLDER
20A
20A
MAIN FAN
RELAY
MAIN FAN
RELAY
AIR
CONDITIONING
RELAY
COMPRESSOR
MAGNET
CLUTCH
F16
F79
F17
2 1
1 2
B: B135
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
3
4
1
2
26
28
27
25
18
20
19
17
10
11
12
9
F27
PRESSURE
SWITCH
2
1
F79
F24
F96 B:
B283
1 2
1 2 3 4 5 6 7
3 4
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
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
IGNITION
SWITCH
F/B No.17
F/B No.18
F96
B255
A: B134
A:
B:
B135
B:
ECM
C: B136
D: B137
F45
1 2 3 4 5 6 7
8 9 10
9 10 11 12 13 14 15 16 17 18
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-19
BATTERY
SBF-4 SBF-1
2
1
F17
2
F45
B60
1
F16
: WITH OBD
WO
: WITHOUT OBD
OO
B282 AUTO A/C
CONTROL
B283 MODULE
E
D:
B137
1 2
8
5 6 7 8 9 10 11 12
14 15 16 17 18
A: B134
6 1 2 3 4
16 17 9 10 11 12 13 14 15 16 17
25 26 24 25 26 27 28 29 30
MAIN FAN
MOTOR
M
SUB FAN
MOTOR
M
MODEL
MODEL
3 4
13
19 20
5 6 7 8
18 19 20 21 22 23
31 32 33 34 35
AC-00674