Subaru SVX 1992 Manual page 1026

4-7 [TSD01 AUTOMATIC AIR CONDITIONING SYSTEM
D: BLOWER MOTOR SPEED DOES NOT CHANGE .
CONTENTS OF DIAGNOSIS :
Faulty auto amplifier, fan control amplifier or HI relay
1 Check fan control amplifier control voltage .
OK
2 Check HI relay and ground circuit.
OK
Faulty fan control amplifier
Faulty HI relay
TROUBLE SYMPTOM :
Blower motor speed does not change but is constant .
Not OK
Faulty auto amplifier or harness
Not OK
Not OK
3 Check HI relay control circuit .
OK
Faulty auto amplifier or harness.
895 k1
O~ BM8
B9b BM2
OFF relay
2
r~ 4 BM2 B96 879 ill
a :
i17
IL-~~~o--I~
l 3
e 1
I GN 2
BM6
1
M
Z Auto amp .
1
Blower
motor
Fan
control
4 amp .
2'
4
12~3
HI relay
B95
BM8
B96 895
BM7 BM5 BM6 ill i17
12345678
910 1112 131< 1R2I
(I1 12
'2II' 34
1234 5678 12345678
918177213i4151b1718 910111213141 16
C4-670
Fig. 193
92