Toyota Camry Hybrid AHV40 Manual page 27

MG (Motor Generator) ECU
D The MG ECU is provided in the inverter assembly. In accordance with the signals received from the THS
ECU, the MG ECU controls the inverter and boost converter in order to drive MG1 or MG2 or cause them
to generate electricity.
D The MG ECU transmits information that is required for vehicle control, such as the inverter output
amperage, inverter temperature, and any failure information, to the THS ECU. It receives information
that is required for controlling the motor generator, such as the required motive force and the motor
temperature, from the THS ECU.
3. Cooling System (for Inverter, MG1 and MG2)
D A cooling system that is independent from the engine cooling system has been provided to cool the
inverter, MG1 and MG2.
D This cooling system activates when the power supply status is switched to the READY ON state.
D A radiator, which is exclusively used for the inverter, MG1 and MG2, has been provided above the
condenser (for the A/C). By integrating the independent inverter radiator, A/C condenser and engine
radiator, the layout has been made more compact.
" A
Specifications
Water Pump Discharge Volume
Capacity
Type Type
C l t Coolant
Color
Maintenance Maintenance
Intervals
*: Similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant
with long-life hybrid organic acid technology. (Coolant with hybrid organic acid technology consists of
a combination of low phosphates and organic acids.)
D SLLC is pre-mixed (50% coolant and 50% deionized water for U.S.A. or 55% coolant and 45% deionized
water for Canada), so no dilution is needed when adding or replacing SLLC in the vehicle.
THS II (TOYOTA HYBRID SYSTEM II)
Dedicated
Radiator
liters (US qts, Imp. qts)
First Time
Subsequent
Reservoir Tank
Water Pump
liter/min. 10 or above (65_C (149_F))
TOYOTA Genuine Super Long Life TOYOTA Genuine Super Long Life
Coolant (SLLC) or the equivalent*
100,000 miles (160,000 km)
Every 50,000 miles (80,000 km)
TH-27
02HTH26TE
2.9 (3.1, 2.6)
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