2001 TOYOTA PRIUS Service Repair Manual

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Page 57 of 1943

TOYOTA PRIUS 2001 Service Repair Manual 2001 PRIUS (EWD414U)
A 12 A23 A3A2A1
A 4A5A3A2A1A6A 27GIVG GUU GVU GWU G1 T GSDN
C 8B7B8 A 14 A15 A24 MFIV GSIV GFIV
B GB
B R WGL Y
B GB
B R WGL Y
(
*1)HYBRID VEHICLE CONTROL ECUA H10 , H11CB, H12 E,

Page 58 of 1943

TOYOTA PRIUS 2001 Service Repair Manual 2001 PRIUS (EWD414U)
TOYOTA HYBRID SYSTEM
BJA 22A 17 A16 IB1 10 IB16 D 26 D25
R±W
B±L W± B W± B
R±W
B±LR±W
B± L
BATTERY ECUB B1 7 , B1 8A HYBRID VEHICLE CONTROL ECUA H10 , H11
CB, H12
E , H13

Page 59 of 1943

TOYOTA PRIUS 2001 Service Repair Manual 2001 PRIUS (EWD414U)
IH1 8IH19 B 13 B2
IF1 11E 1
B 4B10 B3 A 6A7A18 A19E 18 E 19 E 20 E 2
B 2
B B B BA CAC
W
B
R
GW
B
R
G
W± B
W± B
Y
Y±B
Y±RW
B
R
G
V
GR
P V
GR
P Y±RY±BY
W±B
BATTERY ECUB B17 ,

Page 60 of 1943

TOYOTA PRIUS 2001 Service Repair Manual 2001 PRIUS (EWD414U)
TOYOTA HYBRID SYSTEM
HYBRID VEHICLE CONTROL ECUA H10 , H11
CB, H12
E , H13
D , H14
W± BW± B HTB± BTH+
18 D
G
14
HVO+ HVO±22
R
D 17BTH±
30 D
V
16
HVI± HTB+
20 D
LG
24
HVI+ B

Page 61 of 1943

TOYOTA PRIUS 2001 Service Repair Manual 2001 PRIUS (EWD414U)
22 22
IE 3D
4IA1
25 13
A B A BB B
IH1 5
A 1A
A A 20A
HV10A
BATT FAN
11 1F 1J8
25 13IH1 7
1
2M
B 82BB 934
21 FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
LG±R
L±R
L±B
W±B W±BL
L±B

Page 62 of 1943

TOYOTA PRIUS 2001 Service Repair Manual 2001 PRIUS (EWD414U)
TOYOTA HYBRID SYSTEM
FEATURES OF TOYOTA HYBRID SYSTEM
This system controls the following modes in order to achieve the most efficient operations to match the driving conditions.
(

2001 PRIUS (EWD414U)
TOYOTA HYBRID SYSTEM
FEATURES OF TOYOTA HYBRID SYSTEM
This system controls the following modes in order to achieve the most efficient operations to match the driving conditions.
(1) Supply of electrical power from the HV battery to motor generator no.2 provides force to drive the wheels.
(2) While the tires are driven by the engine via the planetary gears, motor generator no.1 is driven via the planetary gears to
supply electricity to motor generator no.2 to drive the wheels.
(3) When the vehicle is decelerating, kinetic energy from the wheels is recovered and converted into electrical energy and
used to recharge the HV battery by means of motor generator no.2.
The hybrid vehicle control ECU switches between these modes (1, 2, 1+2, or 3) according to the driving conditions.
However, when the state of charge of the HV battery is low, the HV battery is charged by the engine by turning motor
generator no.1.
CRUISE CONTROL OPERATION
Cruise control is the speed control device, which sets the desired speed by just operating the switch on the control panel
without pressing the accelerator pedal. This device is used when you would like to drive the vehicle at the fixed speed.
1. SET CONTROL
If you operate the SET/COAST switch when driving (The available range of set speed: between about 40 and 200 km/h) with
the main switch is ON (When power indicator comes on), the device memorizes vehicle's speed when switch is off and
controls the fixed speed.
2. SET SPEED CONTROL
This device compares the vehicle's running speed and the memorized speed, and controls the driving power of the motor
and the engine by calculating the cruise control requirements so that both speed become equivalent.
3. COAST CONTROL
If the SET/COAST switch is continued to be ON during the running with the cruise control, the device recognizes the cruise
control requirement is at 0 and decelerates the vehicle's speed. Then the device memorizes the speed when the switch is off
in order to control the fixed speed.
In each time you operate SET/COAST switch momentarily (For about 0.5 second), the memorized speed is decreased in
about 1.5 km/h. However, in case of the tap±down operation with more than 5±km/h gap between the memorized speed and
vehicle's running speed, the device memorizes the vehicle's speed when the switch is off and controls the fixed speed.
4. ACCEL CONTROL
If the RESUME/ACCEL switch is continued to be ON during the running with the cruise control, the device recognizes the
cruise control is on the acceleration side and accelerates the vehicle's speed. Then the running speed when the switch is off
is memorized to control the fixed speed.
In each time you operate RESUME/ACCEL switch momentarily (For about 0.5 second), the memorized speed is increased
in about 1.5 km/h. However, if there is more than 5±km/h gap between the memorized speed and vehicle's running speed,
this operation does not change the memorized speed. (Tap±up operation is not available.)
5. RESUME CONTROL
If the running speed is faster than the low speed limit after the cruise control is canceled manually, the fixed speed is
controlled by the OFF±ON operation of RESUME/ACCEL switch, so that the vehicle's speed returns to the memorized
speed at the time the cruise control is released.
SYSTEM OUTLINE

Page 63 of 1943

TOYOTA PRIUS 2001 Service Repair Manual 2001 PRIUS (EWD414U)
6. MANUAL CANCEL CONTROL
When each of the following signals is input during driving with cruise control, the cruise control is released with turning the
cruise control requirement

Page 64 of 1943

TOYOTA PRIUS 2001 Service Repair Manual 2001 PRIUS (EWD414U)
TOYOTA HYBRID SYSTEM
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
223Engine Room R/B No.2 (Right Side of Reserve Tank)
�� : JUNCTION BLOCK AND WIRE HARNES

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