ELECTRICAL FAN CONTROL OPERATION [ZY, Z6]

id0140a0104000


Operation

•  The PCM operates cooling fan relays No.1, No.2 and No.3 as indicated in the table below.

Fan operation conditions

Cooling fan relay No.1

Cooling Fan relay No.2, No.3

Operation condition
Stop
OFF
OFF
•  Except for low-speed and high speed operation conditions.
Low-speed rotation
ON
OFF
•  When all of the following conditions are met.
―  A/C ON
―  Refrigerant pressure switch (middle) OFF
―  Engine coolant temperature is 108°C {226°F} or less
•  When all of the following conditions are met.
―  A/C OFF
―  Engine coolant temperature is 100—108°C {212—226°F}
HIgh-speed rotation
ON
ON
•  Engine coolant temperature 108°C {227°F} or more
•  When all of the following conditions are met:
―  A/C ON
―  Refrigerant pressure switch (middle) ON
•  ECT sensor malfunction