AC-41
HVAC SYSTEM (AUTO A/C)(DIAGNOSTIC)
General Diagnostic Table
9. General Diagnostic Table
A: INSPECTION
Symptom
Problem parts
A/C system fails to operate.
• Fuse
• Connector (Poor contact)
• Ground
• Auto A/C control module
• Blower fan motor
• Blower fan relay
• A/C Relay
• Compressor (Magnet clutch)
• Evaporator sensor
Fuse is blown out.
• Fuse
• Connector (Poor contact)
Illumination cannot dim.
• Fuse
• Connector (Poor contact)
• Auto A/C control module
Blower fan does not rotate or fan speed cannot be controlled.
• Fuse
• Connector (Poor contact)
• Ground
• Auto A/C control module
• Blower fan motor
• Blower fan relay
Unable to switch suction vents.
• Connector (Poor contact)
• Auto A/C control module
• Intake door actuator
Unable to switch blow vents.
• Connector (Poor contact)
• Auto A/C control module
• Mode door actuator
Compartment temperature does not increase. (No hot air is dis-
charged.)
• Connector (Poor contact)
• Auto A/C control module
• Air mix door actuator
• In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
• In-vehicle sensor aspirator hose
Compartment temperature does not decrease. (No cool air is
discharged.)
• Connector (Poor contact)
• Auto A/C control module
• Air mix door actuator
• A/C Relay
• Compressor (Magnet clutch)
• Radiator fan motor
• Radiator fan relay
• In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
• In-vehicle sensor aspirator hose
Compartment temperature is higher or lower than setting tem-
perature.
• Auto A/C control module
• Air mix door actuator
• In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
• In-vehicle sensor aspirator hose
Compartment temperature does not quickly respond to setting
temperature.
• Air mix door actuator
• In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
• In-vehicle sensor aspirator hose
Radiator fan does not rotate during A/C operation.
• Radiator fan motor
• Radiator fan relay
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 ...