Subaru Impreza 2002 Service Manual page 3517

INSTRUMENTATION/DRIVER INFO
Step
7 CHECK HARNESS BETWEEN AUTO A/C
CONTROL MODULE AND COMBINATION
METER.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from combination
meter.
3)Measure the resistance between auto A/C
control module harness connector terminal
and combination meter harness connector ter-
minal.
Connector & terminal
(B282) No. 11 — (i11) No. 12:
8 CHECK POWER SUPPLY FOR AMBIENT
SENSOR.
1)Turn the ignition switch to ON.
2)Measure the voltage between auto A/C con-
trol module terminal and chassis ground.
Connector & terminal
(B283) No. 9 (+) — chassis ground ( − − − − ):
9 CHECK HARNESS BETWEEN AMBIENT
SENSOR AND COMBINATION METER.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ambient sen-
sor.
3)Measure the resistance between ambient
sensor harness connector terminal, combina-
tion meter harness connector terminal and
auto
A/C control module harness connector termi-
nal.
Connector & terminal
LHD model:
(F78) No. 1 — (i11) No. 11:
(F78) No. 1 — (B283) No. 9:
(F78) No. 2 — (i11) No. 8:
RHD model:
(F78) No. 2 — (i11) No. 11:
(F78) No. 2 — (B283) No. 9:
(F78) No. 1 — (i11) No. 8:
10 CHECK AMBIENT SENSOR.
1)Remove the ambient sensor.
2)Check the ambient sensor. <Ref. to IDI-21,
INSPECTION, Ambient Sensor.>
11 CHECK OUTSIDE TEMPERATURE INDICA-
TOR.
1)Connect the combination meter and auto
A/C control module harness connector.
2)Connect a resistor (2.2 kΩ) between termi-
nals of ambient sensor harness connector.
3)Turn the ignition switch to ON and check the
outside temperature indicator display.
COMBINATION METER SYSTEM
Is the resistance less than 10
Ω?
Is the voltage more than 4V?
Is the resistance less than 10
Ω?
Is the ambient sensor OK?
Is the outside temperature indi-
cator indicating 25°C (77°F)?
IDI-14
Check
Go to step 8.
Go to step 9.
Go to step 10.
Go to step 11.
Repair the poor
contact of ambient
sensor harness
connector.
Yes No
Repair the wiring
harness.
Replace the auto
A/C control mod-
ule.
Repair the wiring
harness.
Replace the ambi-
ent sensor.
Replace the com-
bination meter
printed circuit.