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Mazda CX-5 Service & Repair Manual: Electrical Fan Control

Mazda CX-5 Service & Repair Manual / Engine / Cooling / Electrical Fan Control

Outline

Block Diagram


Operation

Operation Pattern

Demand airflow volume

Cooling fan relay

Cooling fan motor

No.1

No.2/No.3

No.1

No.2

No airflow

OFF

OFF

Stop

Stop

Small

ON

OFF

Low-speed

Low-speed

Large

ON

ON

High-speed

High-speed



Engine coolant temperature condition


A/C operation condition


Operation condition

Demand airflow volume

  • When all of the following conditions are met.

    • Refrigerant pressure: 1.3 MPa {13 kgf/cm2, 189 psi} or less, vehicle speed: 45 km/h {28 mph} or more

    • Refrigerant pressure: 2.2 MPa {22 kgf/cm2, 319 psi} or less, vehicle speed: 85 km/h {53 mph} or more

No airflow

  • When all of the following conditions are met.

    • Refrigerant pressure: 1.3 MPa {13 kgf/cm2, 189 psi} or less, vehicle speed: 45 km/h {28 mph} or less

    • Refrigerant pressure: 1.3—1.5 MPa {14—15 kgf/cm2, 189—217 psi}, vehicle speed: 85 km/h {53 mph} or less

    • Refrigerant pressure: 1.5—2.2 MPa {16—22 kgf/cm2, 218—319 psi}, vehicle speed: 65—85 km/h {41—52 mph}

Small

  • When all of the following conditions are met.

    • Refrigerant pressure: 1.5—2.2 MPa {16—22 kgf/cm2, 218—319 psi}, vehicle speed: 65 km/h {40 mph} or less

    • Refrigerant pressure: 2.2 MPa {22 kgf/cm2, 319 psi} or more

Large


After Cooling Control

Cooling System
Outline Passing water resistance is reduced by improvement of the engine coolant passage shape. Pump efficiency is improved by changing the water pump impeller to the closed impel ...

Engine Coolant Leakage Inspection
WARNING: Never remove the cooling system cap or loosen the radiator drain plug while the engine is running, or when the engine and radiator are hot. Scalding engine coolant and steam may ...

Other materials:

Car Navigation Unit Removal/Installation
CAUTION: The audio unit communicates with the car-navigation unit and records the presence/non-presence of the car-navigation unit when the ignition is switched to ACC or ON (engine off or on) after connecting the negative battery cable. If the commander switch is installed ...

Intake Air Temperature (Iat) Sensor
IAT Sensor No.1 Purpose/Function Detects the IAT before it passes through the throttle body as basic information for mainly determining the fuel injection amount. Detects the IAT before it passes through the throttle body and inputs it to the PCM as an IAT signal. Constru ...

Thermostat Removal/Installation
WARNING: Never remove the cooling system cap or loosen the radiator drain plug while the engine is running, or when the engine and radiator are hot. Scalding engine coolant and steam may shoot out and cause serious injury. It may also damage the engine and cooling system. Tu ...

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