Brake TOYOTA PRIUS 2001 Service Owner's Guide

SYSTEM INDEX
M OVERALL ELECTRICAL WIRING DIAGRAM
2001 PRIUS (EWD414U)
SYSTEMS LOCATION SYSTEMS LOCATION
ABS 19±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning 24±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back±Up Light 6±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter 11±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combination Meter 23±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Lock Control 15±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electric Tension Reducer 13±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EMPS 20±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Control 2±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gateway System 14±8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight (w/ Daytime Running Light) 4±2. . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight (w/o Daytime Running Light) 3±2. . . . . . . . . . . . . . . . . . . . . . . . .
Horn 12±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hybrid Vehicle Immobiliser System 2±16. . . . . . . . . . . . . . . . . . . . . . . . . . .
Illumination 8±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Light 10±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Reminder and Light Reminder Buzzer 9±2. . . . . . . . . . . . . . . . . . . . . .
Light Auto Turn Off 9±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Navigation System 14±5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Source 1~24±1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Window 18±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator Fan and Condenser Fan 22±3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio and Player 14±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Window Defogger 22±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Control Mirror 11±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Belt Warning 9±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Lock 13±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS 21±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stop Light 3±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillight 7±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft Deterrent 17±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TOYOTA Hybrid System 1±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
* Charging
* Cruise Control
* Regenerative Brake
Turn Signal and Hazard Warning Light 5±2. . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper and Washer 12±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wireless Door Lock Control 16±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2001 PRIUS (EWD414U)
M
5
678
14 PRIUS (
Cont' d)
1IJ1
9A1C 4C 3A
10 A 1A10 A
18 A14 A 5B 10B
6IJ1 7IJ1
5B 10B22 I J1B 6 2B7B8B3B1B
16 IJ1 17 IJ1 15 IJ1 18 IJ1 19 IJ1
B 2B7B8B3B120 IJ1
7IJ2 6IJ2 4IG1 3IG121
2A 11 A
IF Left kick
panel21 IJ1 17 A5ID1 2C 4A 11 A 6C
IDCowl si de
panel LH 2D 8
2K 8EA
DB 5A 13 A
AE
11 13
215 411 7 14D D
414
316 E
A
AD
DD
B±Y R± G
GR±R
R
G B±Y B±YGR± L
GR±B
W±B
W±B W±B W±BGR GR
W±B
Y (
SHI ELDED)
G
B
R
W
G
R (
SHI ELDED)
R G (
SHI ELDED) WR B GY (
SHI ELDED)
BR
G
R WRB GY R± YBR V± WG R B±Y B± Y
BR BR BR
G
R
GR ±R
V(
*2)
P(
*2)
L±Y R G P±B
G
R
GR±RP
V
B±Y
W±B
W± B
GR± B
L±Y L±Y
B
C
D
E
F A
H
I
J
K
L±Y
GR P(
*2) V(
*2) R±G
GR± R GR± RL±Y L±Y B± Y
12 5 9 2 8
A
E1 0
ENGI NE CONTROL
MODUL EB 8
BODY ECU
A 7
A/ C AMPLI FI ERC11
COMBINATION
ME TER
J21
JUNCTION
CONNECTOR
J24
JUNCTI ON
CONNECTOR
J11
JUNCTI ON
CONNECTOR
JUNCTI ON
CONNECTORB A J22 J23, J14
J UNCTI ON
CONNE CTORJ21
JUNCTI ON
CONNE CTOR
To Combination Meter
< 23±3>
FA
HB
J UNCTI ON
CONNE CTORB A J27 J28, R± G
R± Y
To Parking Brake SW
< 19±8>
G 1
GATEWAY ECU
(
*2) (
*2) (
*2)
(
*2)(
*2)(
*2)
F1 4
FRONT DOOR SPEAKER
LHM 5 M 6,
MUL TI DI SP LAYAB
N 2 N 3,
NAV I GA TI ON EC UABM 7 , C
Gateway System Navigation System
GR± R
G
7ID1
5A
V± W
To Combination Meter
< 23±3>MPX + MPX +MPX 2 MPX +
MPX ± MPX ±MP2 + MPX 1
6B * 2 : w/ Navigation System
Fr om Bac k±Up Light
Relay<6±4> R±B A 14
IJ13
V±W
REV SPD
To Data Link
Connect or 3< 2±5>
(
SHIELDED)
+B AUI + AUI ± ACC AUO± AUO+ TX1+ TX1± R G SYNC B VR VG GND+B1 ACC TX+ TX± TX1+ TX1± VG R G SYNC B VR TC PKB GND1 SPD TX3 ± TX3 + I G
GND CG MPD1 MPD2GTX ± GTX + ACC I G B ATT

2001 PRIUS (EWD414U)
M OVERALL ELECTRICAL WIRING DIAGRAM
1
234
19 PRIUS(
Cont. next page)
1B 1C
1D2H 1
A
5A AM12 1
3 5
120A MAIN1I15
IGNI TION SW2B 3 2D 6
IDCowl si de
panel LH 2K 8
W±B W±B
B±Y W± GW
B
WB±GJ11
J UNCTI ON
CONNECTOR BATTERYF18
FUSI BLE L I NK
BLOCK NO. 2IG1
RELAY
F10 F11,
FUSI BLE LI NK
BL OCK NO. 1ABF12, C
100A
DC/ DC 1A
W W± G10A GAUGE
2A 53
322A2B9A 10 A
3B 14 A
IHRight k ick
panel2IP1 1IP1
4 3
2 1
4 3
2 1
3 1
6 4
2 22 22 33
22 22 333 2ACC
IG1
ST1
IG2
ST2 AM1 4
6 7AM2
1B 21K 41K6
30A ABS NO. 2 20A ABS NO. 3 15 A AM2
3C B
14 IA2
J 1J 92G12C 2G
H
L
40A ABS NO. 1 10A ABS NO. 4
KI F
M
N
O
P
6
2B7
2A
Power SourceABS
W± B G±WG Y±GL±O LG±RY± BB±LGR GR ±BR V± R B± WL B± W
D
E
L±O Y±BY±B
L W± R
B± L
W± L
BLG±WY± GG LG±RW±B
R
Y± BL
BR
D , F13
WL
W±R
1 2
W± L
B± WHYDRO MTR
NO. 1 RELAY HYDRO MTR
NO. 2 RELAYABS SOL
RE LAY L
L
L
BY± B
W±R
12
21
C10 C11,
COMB I NATI ON
METERAB
BRAKEABS
B±Y
22I5A E CU± I G
A B±Y

2001 PRIUS (EWD414U)
M
78
6 5
(
Cont. next page)
19 PRIUS (
Cont' d)
15 A 16 A
13
11 14
4
GR GR±L
2K 2
5B 2B 18B 22D C B
1C
J G
H
KI F
L
M
N
O
P19A 7B 29A 3D 2D1B
2B 5
2G 129C5C10C2B12C3B 4C11C3C6C2C1C
1A2A21A7A8A9A4A3A5A6D1D8D
31 A 6 A 27 A 28 A 18 A 11 A 9 D
2A 2B
IECowl si de
panel LH3B 3A 6A 1A 5B
5A 1B 4A 4B7C
1 28B 17B
IDCowl si de
panel LH 8C 7C
16 D 7 D
B D
EB±W
V±R
RL B±W
GR± B
GR
B± L
Y± B
LG±R
L±O
Y± G
G
G±W
W±BR± Y V± R B± W
MPD 1 MPX1
SR BRL SP1 WA MPX2
MPD 2 B 8
BODY ECUA
ABS
G
G±W
W±B W±B
W±B W±BW± B
GR±B
R1 + MR1 R2+ MR2 GND1 GND2 MTT MT+ MT± P H PL LBL GND3 GND4SFRH SFRR SFLH SF LR SRRH SRRR SMC1 SMC2 SS AST SLA+ SLA± SLR+ SLR±
11
A
AAA 4
4
AA A
L B± W B± WR± B R±WY±B R± GR± YR± L G± WG±B G±OB±OL LGP V
B±L Y± B LG±RL±O Y± G W± B
W± BW± L Y± GY GR Y± R LG±RW± B W± B
W±B W±B
W±B
W±B W±B
W±B W±B
W±B W±B
MP2+
MPX+
B10 B11,
BRAKE ECUAB
H 5 H 6,
HYDRA ULI C B OOSTERABB 1 B 2,
BRAKE ACTUAT ORAB
R
A
E10
ENGINE CONTROL
MODULEG 1
GATEWAY ECU
A 7
A/ C AMPL I FI ER+BS IG2
J 1
JUNCTION
CONNECTOR
J 7
JUNCTI ON
CONNECTOR
B 4
BRAKE FL UI D LEVEL
WAR NI NG SWJ11
JUNCTI ON
CONNECTOR
B12 , C D, B13B 3 , C
W±B W±B
13 C
18 IA2
1PKB
R±Y R± Y
R±YP 2
PARKI NG
BRAKE SW
AA B± YB±Y
EA EA
EB
R± Y
From Mul ti
Display< 14±7> JUNCTION
CONNECTORB A J12 J13,
R± Y
EB
From Dayti me
Run nin g
Light Relay
<4±4>
MPX+ MPX±

2001 PRIUS (EWD414U)
M OVERALL ELECTRICAL WIRING DIAGRAM
9
1011 12
19 PRIUS (
Cont' d)
9A 5A 1A
10 A 22 A 23 A 12 A12A8A4A
16 C 25 C 24 C 15 C11A7A3A
9C 28C 27C 18C10A6A2A
5D 13D 20D 19D 3B 10B 4B 1B
To Data Link
Connector 3
<2±5><2±6> Fr om Stop Light SW
<3±4>
24 B 16 B 14 B 22 B15 B 23 B
To Hybr id
Vehicle
Contr ol ECU
< 1±19> < 1±20> To EMPS ECU
< 20±4>
B16A15A 14A13A 19B20B 11B12B24 A21 B
1IB1 2IB1 5IB1
ABS
J10
JUNCTION
CONNECTOR
W±BB10 B11,
BRAKE ECUAB B13, D C , B12B 3 , C B 1 B 2,
BRAKE ACTUATORAB
B WRB WRB WRB WRP±B W± L GR± GG± W
LGVG RR G BRP
W±B L PL
PL Y BR
BR±BB W
(
Shielded) (
Shielded)
(
Shielded) (
Shielded) (
Shielded) (
Shielded)
(
Shielded) (
Shielded)(
Shielded) (
Shielded)
HVI + HVI ± HV O+ HVO± FL+ FL± FSS FR+ FR± RL+ RL ± RS S RR+ RR± RRO RLO VCM PMC E2 SG1 VREG PREG EREG SG2 VFR PFR EFR SG3 VRR PRR ERR SG4 TC D/ G TS STP
(
Shielded)
AA
A
221112
A 4
ABS SPEED
SENSOR FRONT LHA 5
ABS SPEED
SENSOR FRONT RHA23
ABS SPEED
SENSOR REAR L H12
A2 4
ABS SPEED
SENSOR REAR RH (
Shielded) A
W±B B± Y
W± B20 C
BZ6B
IG1
G
13 IA2
G1 2B±Y
DA
EB EB
B±Y
B±Y
J14 J15,
J UNCTI ON
CONNECTORAB
B14
BRAKE
WARNING BUZZERBUZZER

2001 PRIUS (EWD414U)
M
BRAKE SEAT BELT
(
Driver' s Seat)5
68 7
23 PRIUS (
Cont' d)
HI GH BEAM
TURN R
TURN L
SRS
ABS
MA LFUNCTI ON
I NDI CATOR LAMP
SEAT BEL T
(
Front
Pass enger' s Seat)
WATER TEMP.
(
Hi gh)
WATER TEMP.
(
Low)
CRUI SE
OUTPUT CONTROL
CHARGE
OI L
B 5 19A 18A 17A
4B 10A 16A
Combination M eter
See Tur n Signal
Light Sy stem< 5±4>See Headlight System
< 3±3> <4±4>
Se e SRS Syst em
< 21±3>
See Engine Cont rol
Sy st em< 2± 4> See ABS System
< 19±4> See SRS Sy st em
< 21±3>
C10 C11,
COMBI NATI ON METE RAB

NEW MODEL OUTLINE
Gasoline engine + AC motor = TOYOTA Hybrid System (THS)
Tremendous improvement in fuel efficiency & clean achieved!
Inverter1NZ-FXE
engine
P111 Hybrid transaxleHV battery182MO11182MO12
Hybrid transaxle
13
TOYOTA Hybrid System (THS)
The TOYOTA hybrid system has two drive sources, one is the gasoline engine and the other, the AC motor.
The power train system selects the best combination of the different characteristics of both depending on
driving conditions. Also, through the adoption of a regenerative braking system, which recovers energy
during deceleration and ªidling stopº whereby the engine is stopped during idling, we have been able to
provide for maximum energy conservation. This has resulted in a vastly superior fuel economy compared
with that of gasoline A/T vehicles of the same displacement.
Features of the System
1. Optimum distribution of drive sources
The most efficient engine operating zone is automatically selected by controlling the optimum distribution of the engine and motor
drive energy sources.
2. Reduced energy loss
The engine is automatically stopped when starting and travelling at low load to reduce fuel consumption.*1
The kinetic energy that used to be lost through engine or foot braking is recovered by the regenerative braking system and used
for recharging, thereby contributing to improved fuel efficiency. When the driver applies the brakes, the hydraulic and regenera-
tive braking systems are coordinated. In order to recover more energy, a higher proportion of regenerative braking is used.
3. Not required for recharging from an external source
The system uses MG1 (Motor Generator No.1) and MG2 (Motor Generator No.2) to maintain a constant battery charge, so unlike
an electric vehicle, recharging from an external source is not required.
*1 : In some cases, the engine does not stop, depending on the air conditioner and HV battery (Hybrid Vehicle Battery) status.
System configuration
P111 HYBRID TRANSAXLE
Fitted with built-in THS transaxle MG1 (Motor Generator No.1), MG2 (Motor Generator No.2), power spliting device and reduction
gears for the hybrid system. These function to switch engine operation to MG2 assistance, HV battery charging and power generation
for driving MG2.
Inverter
This controls the current between MG1, MG2 and HV battery and converts DC/AC power.
HV Battery (Hybrid Vehicle Battery)
This supplies power to the motor at full load or on engine stopping and stores power recovered by regenerative braking or power
generation by MG1. 228 nickel-metal hydride batteries are connected in series to obtain a voltage of 273.6 V DC.

THS (TOYOTA HYBRID SYSTEM)
182TH19
EngineECMHV ECU
Shift Position Sensor
Brake ECU
HV Battery
Accelerator Pedal Position Sensor
Hybrid Transaxle Inverter with Converter
Battery ECU
SMR (System Main Relay)
Service Plug23

FEATURES OF THS
This system controls the following modes in order to achieve the most efficient operations to match the driv-
ing conditions:
1. Supply of electrical power from the HV battery to MG2 provides force to drive the wheels
2. While the tires are driven by the engine via the planetary gears, MG1 is driven via the planetary gears to
supply electricity to MG2 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 MG2.
The HV ECU switches between these modes (1, 2, 1 + 2, or 3) according to the driving conditions. However,
when the SOC of the HV battery is low, the HV battery is charged by the engine by turning MG1.
As a result, it achieves far greater the fuel economy compared to conventional gasoline engine vehicles, at
a reduced level of exhaust gas emissions. Furthermore, this revolutionary powertrain has eliminated the
constraints that are associated with electric vehicles (such as their short cruising range or their reliance on
external recharging units).

LAYOUT OF MAIN COMPONENTS

THS (TOYOTA HYBRID SYSTEM) 24

MAIN FUNCTIONS OF COMPONENTS
MG1Generates high-voltage electricity by being powered primarily by the engine.
Also functions as a starter to start the engine.
Hybrid
Trans-
axle
MG2
Primarily provide additional power to the engine in order to increase the
overall drive force. During braking, or when the accelerator pedal is not
depressed, it generates electricity to recharge the HV battery (Regenerative
brake system).
Planetary
Gear UnitDistributes the engine's drive force as appropriate to directly drive the vehicle
as well as the generator.
HV Battery
Supplies electric power to the MG2 during start-off, acceleration, and uphill
driving; recharged during braking or when the accelerator pedal is not
depressed.
InverterA device that converts the high-voltage DC (HV battery) into AC (MG1 and
MG2) and vice versa (Converts AC into DC).
Converter
Drops the high-voltage direct current (DC 273.6 V) into DC12 V in order to
supply electricity to body electrical components, as well as to recharge the
auxiliary battery (12 V).
HV (Hybrid Vehicle
Control) ECU
Information from each sensor as well as from the ECU (ECM, Battery ECU,
ABS ECU) is received, and based on this the required torque and output power
is calculated.
The HV ECU sends the calculated result to the actuators and controllers.
ECMSends a throttle open command to the electronically-controlled throttle in
accordance with the engine output request factor received from the HV ECU.
Battery ECUMonitors the charging condition of the HV battery.
Brake ECU
Controls the regenerative brake that is effected by the MG2 and the hydraulic
brake so that the total braking force equals that of a conventional vehicle that
is equipped only with hydraulic brakes.
Also, the brake ECU performs the ABS control conventionally.
Accelerator PedalConverts the accelerator angle into an electrical signal and outputs it to the HVAccelerator Pedal
Position Sensor
Converts the accelerator angle into an electrical signal and outputs it to the HV
ECU.
Shift Position SensorConverts the shift lever position into an electrical signal and outputs it to the
HV ECU.
SMR (System Main
Relay)Connects and disconnects the high-voltage power circuit through the use of
a signal from the HV ECU.
Service plugShuts off the high-voltage circuit of the HV battery when this plug is removed
for vehicle inspection or maintenance.

THS (TOYOTA HYBRID SYSTEM)
Shift Position
Sensor
182TH05
Accelerator
Pedal Position
Sensor
BRAKE
ECU
Shift Position
(Main and Sub)
Accelerator Angle
(Main and Sub)
Regenerative
Request FactorHV ECUInverter
Voltage
SMR Control
MG2MG1
RPMEngine
Power
RequestCharging
Condition,
Amperage
SMRSMR
Amperage
HV
Battery Engine
Planetary Gear
Unit
Wheel
Wheel
ECM
Battery
ECU
Hydraulic
Brake
Actual
Regenerative
Braking Factor
Auxiliary
Battery
Mechanical Power Path
Electrical Signal Hydraulic
Converter
25

SYSTEM DIAGRAM