Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple
INPUT SIGNAL
· A/C SWITCH
· ENGINE
COOLANT
TEMPERATURE
SENSOR
· VEHICLE SPEED
SENSOR
ENGINE-
ECU
ENGINE
CONTROL
RELAY
SMOOTHING
CIRCUIT
FIELD EFFECT
TRANSISTOR
CIRCUIT
INPUT SIGNAL
PROCESSING
DRIVE
CIRCUIT
TEMPERATURE
DETECTION
CURRENT
DETECTION
RADIATOR
FAN
MOTOR
FAN CONTROLLER
ENGINE
CONTROL
SYSTEM
FUSIBLE
LINK
2
FAN
CONTROL
RELAY
AC505139
Cooling fan drive circuit <R.H. drive vehicles>
AB
TROUBLESHOOTING
ENGINE COOLING
14-5
CIRCUIT OPERATION
•
The fan controller is powered from fusible link
No.2.
•
The engine-ECU judges the required revolution
speed of cooling fan motor using the input signals
transmitted from A/C switch, vehicle speed sen-
sor and engine coolant temperature sensor. The
engine-ECU activates the fan controller to drive
the cooling fan motor.
Summary of Contents for Lancer Evolution IX 2006
Page 26: ...NOTES...
