ELECTRICAL FAN CONTROL OPERATION [L3 Turbo]
id0140b6104000
Normal Driving Cooling Control
• Controls the PCM output duty ratio according to the engine coolant temperature.
• The control temperature while the engine coolant temperature is decreasing is controlled differently than when it is increasing.
When the A/C Signal is ON
• Controls the PCM output duty ratio depending on the refrigerant pressure and vehicle speed when the A/C switch is on.
Duty ratio (%)
|
Condition
|
Refrigerant pressure (Mpa {kgf/cm2, psi})
|
|
Below 1.18 {12.0, 171}
|
Above 1.96 {20.0, 284}
|
|
Vehicle speed
(km/h {mph})
|
0
|
40
|
60
|
|
30 {19}
|
37
|
60
|
|
40 {25}
|
37
|
60
|
|
50 {31}
|
37
|
60
|
|
60 {37}
|
0
|
60
|
|
70 {43}
|
0
|
50
|
|
80 {50}
|
0
|
50
|
|
Above 90 {56}
|
0
|
0
|
After Cooling Control
• If the ignition is switched off within 5 min after driving for 8 min continuously in either of the following driving modes, the cooling fan operates for 8 min at the output duty ratio of 30%.
Type A
-
― Charging efficiency: 0.55 or more
― Vehicle speed: 30 km/h {19 mph} or more
― IAT: 35°C {95 °F} or more
Type B
-
― Charging efficiency: 0.65 or more
― Vehicle sped: 80 km/h {50 mph} or more
― IAT: 30°C {86 °F} or more
During Test Mode
• Turn on the test mode using the Mazda Modular Diagnostic System (M-MDS), and with the accelerator pedal depressed, the PCM fixes the control duty ratio at the 50%.
Fail-safe
• If the engine coolant temperature sensor is damaged, the PCM fixes the control duty ratio at the maximum value.
