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9. Diagnostics with Phenomenon
A: INSPECTION
A/C system fails to operate.
Fuse is blown out.
Illumination cannot dim.
Blower fan does not rotate or fan speed cannot be controlled.
Unable to switch suction vents.
Unable to switch blow vents.
Compartment temperature does not increase. (No hot air is dis-
charged.)
Compartment temperature does not decrease. (No cool air is
discharged.)
Compartment temperature is higher or lower than setting tem-
perature.
Compartment temperature does not quickly respond to setting
temperature.
Radiator fan does not rotate during A/C operation.
Diagnostics with Phenomenon
Symptom
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
• Fuse (M/B No. 8, F/B No. 22, 31)
• Connector (Poor contact)
• Ground
• Auto A/C control module
• Blower fan motor
• Blower fan relay
• A/C Relay
• Compressor (Magnet clutch)
• Compressor (Lock sensor): 3.0 L model
• Evaporator sensor
• Fuse (M/B No. 8, F/B No. 22, 31)
• Connector (Poor contact)
• Fuse (M/B No. 8, F/B No. 22, 31)
• Connector (Poor contact)
• Auto A/C control module
• Fuse (M/B No. 8, F/B No. 22, 31)
• Connector (Poor contact)
• Ground
• Auto A/C control module
• Blower fan motor
• Blower fan relay
• Connector (Poor contact)
• Auto A/C control module
• Intake door actuator
• Connector (Poor contact)
• Auto A/C control module
• Mode door actuator
• 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
• 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
• Auto A/C control module
• Air mix door actuator
• In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
• In-vehicle sensor aspirator hose
• Air mix door actuator
• In-vehicle sensor, ambient sensor, evaporator sensor and
sunload sensor
• In-vehicle sensor aspirator hose
• Radiator fan motor
• Radiator fan relay
AC(diag)-41
Problem parts
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