Mitsubishi 3000GT 1991 Service Manual page 300

TROUBLESHOOTING HINTS
1. Neither the radiator fan nor condenser fan
rotate at all.
Check fusible link No. 5.
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2. Only the condenser fan does not operate.
Check dedicated fuse No. 8.
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3. The radiator fan and condenser fan do not
operate in the low speed mode, but operate
otherwise.
enter the "ON" state.
Check whether the output of the auto
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compressor control unit is available.
NOTE
For troubleshooting of the air conditioner
control unit, refer to GROUP 55.
(2) The A/C compressor magnet clutch enters
the "ON" state.
Check the resistor.
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Fan Operating Mode
For radiator fan
ON at 85 k 4°C
(185 f 7°F) or more
OFF at 77°C (171°F)
or less
OFF
OFF
ON
OFF
ON
ON
COOLING - Troubleshooting
4. The radiator fan and condenser fan do not
temperature switch
For condenser fan
(for air conditioner
ON at 95 t 4°C
cut-off) OFF at 115 +
3°C (239 2 5°F) or
OFF at 87°C (189°F) over, ON at 108°C
or less
(226°F) or less
OFF
OFF
ON
OFF
OFF
ON
TSB Revision
Check the radiator fan motor relay (LO)
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and condenser fan motor relay (LO).
Check the therm0 sensor (for radiator
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fan).
conditioner switch is turned ON.
Check the radiator fan motor control
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relay.
operate in the high speed mode, but operate
otherwise.
Check the therm0 sensor (for condenser
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fan).
Check the radiator fan motor relay (HI) and
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condenser fan motor relay (HI).
F a n revolving operation condition
OFF
LOW
HIGH
LOW
ON
LOW
HIGH
OFF HIGH
.
Condenser fan motor
Condenser fan motor
operates In HIGH only
when it receives input
from condenser fan
motor relay (HI) and
OFF
OFF
LOW
LOW
LOW
HIGH