ENGINE - 2AZ-FXE ENGINE
02HEG21TE
CDS FAN
RDI FAN
IG1 Relay
ECU IG No.1
DC/DC
Main Body ECU
Battery
Fan
No.1
Relay
Fan
No.2
Relay
3 4
5
Fan
No.3
Relay
Condenser
Fan Motor
Radiator
Fan Motor
Engine
Coolant
Temp. Sensor
MG ECU
Inverter
Water Temp.
FANH
THS ECU
FANL
THW
CAN (CAN No.1 Bus)
A/C ECU
A/C Pressure Sensor
EG-50
9. Cooling Fan Control System
A cooling fan control system in which the THS ECU controls the cooling fan speed in accordance with
the engine coolant temperature, inverter water temperature and the air conditioning operating condition.
The THS ECU controls the cooling fan speed based on A / C pressure sensor signal, inverter water
temperature signal and engine coolant temperature sensor signals. This control is accomplished by
operating the 2 fan motors in 2 stages at low speed (series connection) and high speed (parallel
connection).
Wiring Diagram
Cooling Fan Operation
Air Conditioning
Engine Coolant Temp.
Relay Operation
Cooling
Fan Motor
Cooling
Fan
Air Conditioning
Operating Condition
Engine Coolant Temp.
Inverter Water Temp.
No.1
No.2
No.3
Fan Motor
Connection
Fan
Operation
Low
Low
OFF
3 to 4
OFF
OFF
OFF
OFF
High
Low
ON
3 to 5
ON
Parallel
High
OFF
High
High
ON
3 to 5
ON
Parallel
High
A / C Pressure “Low”
Low
Low
OFF
3 to 4
ON
Series
Low
A / C Pressure “Low”
High
Low
ON
3 to 5
ON
Parallel
High
A / C Pressure “Low”
High
High
ON
3 to 5
ON
Parallel
High
A / C Pressure “High”
High
Low
ON
3 to 5
ON
Parallel
High
A / C Pressure “High”
High
High
ON
3 to 5
ON
Parallel
High
Содержание Camry Hybrid AHV40
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