1991 MITSUBISHI MONTERO Service Manual

Fig. 2: Testing Electric Cooling Fan Relay (3000GT)
Courtesy of Mitsubishi Motor Sales of America.
ELECTRIC COOLING FAN - SYSTEM TESTING
MIRAGE 1.5L
1) With A/C on LOW position, ignition on and engine coolant
temperature greater than 185F (85C), thermosensor completes path to
ground, closing radiator fan motor relay contacts and providing
current to radiator fan motor. See Fig. 1.
2) With A/C on HIGH position and ignition on, power supply
from automatic compressor control unit causes condenser fan motor
relay and condenser fan motor control relay to turn on, causing
condenser fan and radiator cooling fan to operate.

MIRAGE 1.6L
1) With A/C on LOW position, ignition on and engine coolant
temperature greater than 185F (85C), thermosensor completes path to
ground, closing radiator fan motor relay contacts and providing
current to radiator fan motor. See Fig. 2.
2) With A/C on HIGH position and ignition on, power supply
from auto compressor control unit causes condenser fan motor relay to
turn on, causing condenser fan and radiator cooling fan to operate at
a low speed by usage of a resistor.
3) If pressure switch is activated by excessive pressure or
if thermosensor is on when engine coolant temperature exceeds 185
F
(85C), condenser fan motor control relay is activated, causing
condenser fan and radiator cooling fan to operate at a high speed.
ECLIPSE & 3000GT
With ignition on and engine coolant temperature greater than
185F (85C), thermosensor completes path to ground, closing radiator
fan motor relay contacts and providing current to radiator fan. See
Figs. 7 -11.
WIRING DIAGRAMS
For addition wiring diagrams, see appropriate chassis wiring
diagrams in WIRING DIAGRAMS.

Fig. 3: Radiator Cooling Fan Wiring Diagram (Mirage 1.5L)
Courtesy of Mitsubishi Motor Sales of America.

Fig. 4: Radiator Cooling Fan Wiring Diagram (Mirage 1.6L)
Courtesy of Mitsubishi Motor Sales of America.

Fig. 5: Radiator Cooling Fan Wiring Diagram (Eclipse)
Courtesy of Mitsubishi Motor Sales of America.

Fig. 6: Radiator Cooling Fan Wiring Diagram (Galant AWD A/T)
Courtesy of Mitsubishi Motor Sales of America.

Fig. 7: Radiator Cooling Fan Wiring Diagram (Galant FWD & AWD M/T)
Courtesy of Mitsubishi Motor Sales of America.

Fig. 8: Radiator Cooling Fan Wiring Diagram (3000GT)
Courtesy of Mitsubishi Motor Sales of America.