ELECTRICAL FAN CONTROL OPERATION [L8, LF, L5]


id014046104000


Vehicles Equipped With Two Cooling Fan Relays


Operation

ON: Energized
OFF: De-energized

Conditions

PCM terminal

Operation condition

Cooling fan motor No.1

Cooling Fan motor No.2

1U

1V

OFF
OFF
OFF
OFF
•  Engine coolant temperature less than 100°C {212°F} and A/C OFF
ON
ON
ON
ON
•  Engine coolant temperature is 100—108°C {212—227°F} and A/C OFF
•  Engine coolant temperature or less 108°C {227°F} and A/C ON
•  Engine coolant temperature or above 108°C {227°F}
•  ECT sensor malfunction

am6zzn00000908


Vehicles Equipped With Three Cooling Fan Relays


Operation

ON: Energized
OFF: De-energized

Conditions

PCM terminal

Operation condition

Cooling fan motor No.1

Cooling Fan motor No.2

1U

1R

OFF
OFF
OFF
OFF
•  Engine coolant temperature less than 100°C {212°F} and A/C OFF
Low-speed
Low-speed
ON
OFF
•  Engine coolant temperature is 100—108°C {212—227°F} and A/C OFF
•  Engine coolant temperature less than 108°C {227°F} and A/C ON (middle switch off)
HIgh-speed
HIgh-speed
ON
ON
•  Engine coolant temperature or less 108°C {227°F} and A/C ON (middle switch on)
•  Engine coolant temperature or above 108°C {227°F}
•  ECT sensor malfunction

am6zzn00000162


Vehicles Equipped With Four Cooling Fan Relays


General (R.H.D.) specs.

Operation
ON: Energized
OFF: De-energized

Conditions

PCM terminal

Operation condition

Cooling fan motor No.1

Cooling Fan motor No.2

1U

1R

1V

OFF
OFF
OFF
OFF
OFF
•  Engine coolant temperature less than 100°C {212°F} and A/C OFF
Low-speed
Low-speed
ON
OFF
ON
•  Engine coolant temperature is 100—108°C {212—227°F} and A/C OFF
•  Engine coolant temperature less than 108°C {227°F} and A/C ON
HIgh-speed
HIgh-speed
ON
ON
ON
•  Engine coolant temperature or above 108°C {227°F}
•  ECT sensor malfunction


Except for General (R.H.D.) specs.

Operation
ON: Energized
OFF: De-energized

Conditions

PCM terminal

Operation condition

Cooling fan motor No.1

Cooling Fan motor No.2

1U

1R

1V

OFF
OFF
OFF
OFF
OFF
•  Engine coolant temperature less than 100°C {212°F} and A/C OFF
Low-speed
Low-speed
ON
OFF
ON
•  Engine coolant temperature is 100—108°C {212—227°F} and A/C OFF
•  Engine coolant temperature less than 108°C {227°F} and A/C ON (middle switch off)
High-speed
Middle-speed
ON
ON
OFF
•  Engine coolant temperature less than 108°C {227°F} and A/C ON (middle switch on)
HIgh-speed
HIgh-speed
ON
ON
ON
•  Engine coolant temperature or above 108°C {227°F}
•  ECT sensor malfunction

am6zzn00000163