ELECTRICAL FAN CONTROL OPERATION [MZR 2.0 DISI]

id0140j3104000


With three cooling fan relays

Cooling fan motor

Cooling fan relay

Operation condition

No.1

No.2

No.1

No.2/No.3
Stop
Stop
OFF
OFF
•  When any of the following conditions are met and engine coolant temperature is 100 °C {212 °F} or less
―  A/C OFF
―  A/C ON (Refrigerant pressure switch (middle) OFF), vehicle speed: 70 km/h {43 mph} or more
Low-speed
Low-speed
ON
OFF
•  When any of the following conditions are met and engine coolant temperature is 100 °C {212 °F} or less
―  A/C ON (Refrigerant pressure switch (middle) OFF), vehicle speed: 60—70 km/h {38—43 mph}
―  A/C ON (Refrigerant pressure switch (middle) ON), vehicle speed: 150 km/h {93.2 mph} or more
•  When any of the following conditions are met and engine coolant temperature is 100—103 °C {212—217 °F}
―  A/C OFF
―  A/C ON (Refrigerant pressure switch (middle) OFF)
―  A/C ON (Refrigerant pressure switch (middle) ON), vehicle speed: 150 km/h {93.2 mph} or more
•  When any of the following conditions are met, the cooling fan motor operates for a maximum of approx. 8 min. 30 s
―  The ignition is switched off after driving the vehicle at 25km/h {16 mph} or more (engine coolant temperature: 103 °C {215 °F} or more, estimated coolant temperature: specified value or more)
―  The ignition is switched off with the engine coolant temperature sensor is malfunctioning
High-speed
High-speed
ON
ON
•  When any of the following conditions are met and engine coolant temperature is 103 °C {215 °F} or less
―  A/C ON (Refrigerant pressure switch (middle) ON), vehicle speed: 60—150 km/h {38.0—93.2 mph}
•  Engine coolant temperature is 103 °C {215 °F} or more


With four cooling fan relays

Cooling fan motor

Cooling fan relay

Operation condition

No.1

No.2

No.1

No.2/No.3

No.4
Stop
Stop
OFF
OFF
OFF
•  When any of the following conditions are met and engine coolant temperature is 100 °C {212 °F} or less
―  A/C OFF
―  A/C ON (Refrigerant pressure switch (middle) OFF), vehicle speed: 70 km/h {43 mph} or more
Low-speed
Stop
ON
OFF
OFF
•  When any of the following conditions are met, the cooling fan motor operates for a maximum of approx. 8 min. 30 s
―  The ignition is switched off after driving the vehicle at 25km/h {16 mph} or more (engine coolant temperature: 103 °C {215 °F} or more, estimated coolant temperature: specified value or more)
―  The ignition is switched off with the engine coolant temperature sensor is malfunctioning
Low-speed
Low-speed
ON
OFF
ON
•  When any of the following conditions are met and engine coolant temperature is 100 °C {212 °F} or less
―  A/C ON (Refrigerant pressure switch (middle) OFF), vehicle speed: 60—70 km/h {38—43 mph}
―  A/C ON (Refrigerant pressure switch (middle) ON), vehicle speed: 150 km/h {93.2 mph} or more
•  When any of the following conditions are met and engine coolant temperature is 100—103 °C {212—217 °F}
―  A/C OFF
―  A/C ON (Refrigerant pressure switch (middle) OFF)
―  A/C ON (Refrigerant pressure switch (middle) ON), vehicle speed: 150 km/h {93.2 mph} or more
High-speed
Middle-speed
ON
ON
OFF
•  When any of the following conditions are met and engine coolant temperature is 103 °C {215 °F} or less
―  A/C ON (Refrigerant pressure switch (middle) ON), vehicle speed: 60—150 km/h {38.0—93.2 mph}
High-speed
High-speed
ON
ON
ON
•  Engine coolant temperature is 103 °C {215 °F} or more