ELECTRICAL FAN CONTROL OPERATION [L5]SM1934777
ELECTRICAL FAN CONTROL OPERATION [L5]

id0140e3104000


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.
acxuun00001125

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/cm 2, psi})
Below 1.00 {10.2, 145}
1.47 {15.0, 213}
1.77 {18.0, 257}
Above 2.00 {20.4, 290}
Vehicle speed
(km/h {MPH.EN_UK})
0
30
30
70
70
30 {19.EN_UK}
30
30
70
70
40 {25.EN_UK}
30
30
70
70
50 {31.EN_UK}
0
30
70
70
60 {37.EN_UK}
0
0
70
70
70 {43.EN_UK}
0
0
70
70
80 {50.EN_UK}
0
0
70
70
90 {56.EN_UK}
0
0
0
0


During Test Mode

• Turn on the test mode using the Mazda Modular Diagnostic System (M-MDS). The PCM fixes the control duty ratio at the 50% with the accelerator pedal depressed.

Fail-safe

• If the engine coolant temperature sensor is damaged, the PCM fixes the control duty ratio at the maximum value.