AC-20
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
Diagnostics for A/C System Malfunction
15
CHECK POWER SUPPLY TO SUB FAN MO-
TOR.
CAUTION:
Be careful not to overheat the engine during
repair.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from sub fan
motor.
3) Start the engine, and warm it up until
engine coolant temperature increases over
100
°
C (212
°
F).
4) Stop the engine and turn ignition switch to
ON.
5) Measure the voltage between sub fan
motor harness connector and chassis ground.
Connector & terminal
Except turbo AT model:
(F16) No. 2 (+) — Chassis ground (
−
):
Turbo AT model:
(F16) No. 1 (+) — Chassis ground (
−
):
Is the voltage more than 10 V? Go to step
Repair the har-
ness for sub fan
motor power sup-
ply circuit.
16
CHECK GROUND CIRCUIT OF SUB FAN
MOTOR.
Measure the resistance between sub fan motor
harness connector and chassis ground.
Connector & terminal
Except turbo AT model:
(F16) No. 1 — Chassis ground:
Turbo AT model:
(F16) No. 2 — Chassis ground:
Is the resistance less than 1
Ω
?
Repair the har-
ness for sub fan
motor ground cir-
cuit.
17
CHECK SUB FAN MOTOR.
Connect the battery positive (+) terminal to ter-
minal No. 2, and ground (
−
) terminal to termi-
nal No. 1 of sub fan motor connector to make
sure that sub fan motor rotate.
Does the sub fan motor rotate? Go to step
Replace the sub
fan motor.
18
CHECK POOR CONTACT IN SUB FAN MO-
TOR CONNECTOR.
Check poor contact in sub fan motor connec-
tor.
Is there poor contact in con-
nector?
Repair the poor
contact in sub fan
motor connector.
19
CHECK POOR CONTACT IN AUTO A/C
CONTROL MODULE CONNECTOR.
Check poor contact in auto A/C control module
connector.
Is there poor contact in con-
nector?
Replace the auto
A/C control mod-
ule.
Repair the con-
nector.
Step
Check
Yes
No
Summary of Contents for 2004 Forester
Page 54: ...AC 52 HVAC SYSTEM HEATER VENTILATOR AND A C General Diagnostics ...
Page 96: ...AC 42 HVAC SYSTEM AUTO A C DIAGNOSTIC General Diagnostic Table ...
Page 306: ...ET 10 ENTERTAINMENT Front Accessory Power Supply Socket ...
Page 312: ...COM 6 COMMUNICATION SYSTEM Horn Switch ...
Page 347: ...BODY STRUCTURE BS Page 1 General Description 2 2 Datum Points 3 3 Datum Dimensions 11 ...
Page 356: ...BS 10 BODY STRUCTURE Datum Points 61 BS 00030 66 62 63 BS 00031 64 BS 00032 ...
Page 380: ...IDI 18 INSTRUMENTATION DRIVER INFO Ambient Sensor ...
Page 381: ...SEAT SE Page 1 General Description 2 2 Front Seat 6 3 Rear Seat 13 ...
Page 436: ...SL 42 SECURITY AND LOCK Keyless Transmitter ...
Page 446: ...SR 10 SUNROOF T TOP CONVERTIBLE TOP SUNROOF Sunroof Switch ...
Page 456: ...EI 10 EXTERIOR INTERIOR TRIM General Description 12 REAR GATE TRIM EI 00012 ...
Page 532: ...CC 14 CRUISE CONTROL SYSTEM Neutral Position Switch MT model ...
Page 571: ...CRUISE CONTROL SYSTEM DIAGNOSTIC CC H4DOTC Page 1 General Description 2 ...