Mazda 6 - Electric Fan Control

CONTROL SYSTEM
F37
F
Operation Conditions
• While A/C is operating, the PCM cuts off the power supply to the A/C relay as shown below.
End Of Sie
ELECTRIC FAN CONTROL
A6E394018881T14
Operation
L8, LF (Intensely hot area) and L3 engine models
ON: Energized
OFF: De-energized
A/C cut-off condition A/C cut-off time Purpose
During cranking For approx. 4.0 s Startability improvement
Throttle valve is open more than 50% For approx. 5.0 s
Acceleration performance
improvement
ECT is above 113 °C {235 °F}
Alternates between on and off for 10 seconds
until ECT falls to 107 °C {225 °F}
Engine reliability improvement
ECT is above 118 °C {244 °F} Until engine ECT falls below 113 °C {235 °F}
Condition
PCM terminal 4L PCM terminal 4B PCM terminal 4F Operation condition
Cooling fan
motor No. 1
Cooling fan
motor No. 2
Stopped Stopped OFF OFF OFF
A/C: OFF
ECT: below 100 °C [176 °F]
Low speed Low speed ON ON OFF
A/C: OFF
ECT: 100108 °C [212226
°F]
High speed High speed ON ON ON
A/C: OFF
ECT: above 108 °C [226 °F]
Low speed Low speed ON ON OFF
A/C: ON (middle switch OFF)
ECT: below 108 °C [226 °F]
High speed Middle speed ON OFF ON
A/C: ON (middle switch ON)
ECT: below 108 °C [226 °F]
High speed High speed ON ON ON
A/C: ON
ECT: above 108 °C [226 °F]