Toyota Camry Hybrid AHV40 Manual page 45

Cooling Fan Control for HV Battery
D The THS ECU monitors rises in the battery temperature through the four temperature sensors in the HV
battery module. Then, the THS ECU steplessly actuates the cooling fan under duty cycle control, in order
to maintain the temperature of the HV battery module within the specified range.
D While the air conditioning system is operating to cool the cabin, if the HV battery module temperature
is within a normal range, the THS ECU turns the battery cooling fan OFF or changes the fan speed to
low speed. The purpose of this control is to give priority to cooling down the cabin, which also provides
cooling to the battery module through the intake duct located on the center of the rear package tray trim.
" A
System Diagram
A/C ECU
D Cabin Temp.
THS ECU
Battery Fan
Relay
Auxiliary
Battery
THS II (TOYOTA HYBRID SYSTEM II)
HV Battery Module
Temperature Sensors
CAN
(CAN No.1 Bus)
BTH
Serial Communication
Blower Motor
(For Cooling Fan)
Battery Smart Unit
M
02HTH37Y
TH-45