2001 TOYOTA PRIUS radiator

L PART NUMBER OF CONNECTORS
Code Part Name Part NumberCodePart Name Part Number
Note : Not all of the above part numbers of the connector are established for the supply.
2001 PRIUS (EWD414U) L 2
License Plate Light LH90980±11148L 3License Plate Light RH90980±11148
L 4Luggage Compartment Door Unlock SW90980±11212
L 5Luggage Compartment Light90980±11148
L 6Luggage Compartment Light SW90980±11097
M 1Mass Air Flow Meter90980±11317
M 2Motor Generator No.190980±11658
M 3Motor Generator No.290980±11034
M 4Motor Generator No.290980±11143
M 5Multi Display90980±11911
M 6Multi Display90980±11923
M 7Multi Display90980±10799
N 1Noise Filter (Ignition)90980±10843
N 2Navigation ECU90980±11973
N 3Navigation ECU90980±11923
N 4Noise Filter (Rear Window Defogger)90980±11259
O 1Oil Pressure SW90980±11363
P 1Park/Neutral Position SW90980±11535
P 2Parking Brake SW90980±11147
P 3PTC Heater90980±10903
P 4PTC Heater90980±10867
P 5Personal Light90980±11212
P 6Power Window Control SW Front RH
P 7Power Window Control SW Rear LH90980±10797
P 8Power Window Control SW Rear RH
P 9Power Window Master SW90980±11469
P10Power Window Motor Front LH90980±11011
P11Power Window Motor Front RH
P12Power Window Motor Rear LH90980±10860
P13Power Window Motor Rear RH
P14Pretensioner LH90980±11884
P15Pretensioner RH90980±11862
R 1Radiator Fan Motor90980±11237
R 2Radio and Player90980±10996
R 3Radio and Player90980±10997
R 4Radio and Player90980±10903
R 5Remote Control Mirror SW90980±11657
R 6Rear Combination Light LH90980±11011R 7Rear Combination Light RH90980±11011
R 8Rear Speaker LH90980±10935R 9Rear Speaker RH90980±10935
R10Remote Control Mirror LH90980±11587R11Remote Control Mirror RH90980±11587
S 1Steering Shaft Torque Sensor90980±10942
S 2Shift Lock ECU90980±11488
S 3Stop Light SW90980±11118
S 4Side Airbag Sensor LH90980±11857S 5Side Airbag Sensor RH90980±11 857
S 6Side Airbag Squib LH90980±11864S 7Side Airbag Squib RH90980±11864
S 8System Main Relay90980±11529
S 9System Main Relay82675±36050S10System Main Relay82675±36050
S11System Main Relay±S12System Main Relay±
T 1Theft Deterrent Horn90980±10619
T 2Throttle Control Motor90980±11162
T 3Throttle Position Sensor90980±10711
T 4Transponder Key Computer90980±11475
T 5Turn Signal Flasher Relay90980±10799
T 6Tension Reducer Solenoid90980±11918
U 1Unlock Warning SW and Key Interlock
Solenoid90980±10795
V 1Vacuum Sensor (HC Adsorber and Catalyst
System)90980±10845
V 2VSV (EVAP)90980±11156
V 3VSV (HC Adsorber and Catalyst System)90980±11149
V 4Vapor Pressure Sensor90980±11143
V 5VSV (Canister Closed Valve)90980±11156
V 6VSV (Parge Flow Switching Valve)90980±11859
W 1Washer Motor90980±10981
W 2Water Pump Motor (A/C)90980±10887
W 3Water Pump Motor (Inverter)90980±11003
W 4Water Temp. SW90980±11235
W 5Wireless Door Control Receiver90980±11909

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
1
234
22 PRIUS
Power Source
1120A MAIN
100A DC/DC
IE Cowl side
panel LHA 1D 1B
B± G
J 1
JUNCTI ON
CONNE CTOR F18
FUSI BL E LI NK
BL OCK NO. 2
BATTERYF1 1 F13,
FUSI BL E LI NK
BL OCK NO. 1BDRadiator Fan and Condenser Fan
5
3 1
2
5A AM1
2B 3 2D 6
2K 8
B±Y W±GIG1 RELAY
12H 2G7
B5A E CU± I G
40A DEF
W
24
2M 4
32
51
ID Cowl side
panel LHA
J11
JUNCTI ON
CONNE CTOR30A
RDI
2 1
3 5
5 3
2 1
4
2 1
3 5
1J 5 1K 71J10 1A 11 1K 31K 21K51J12
1 2
M6IE1
7IE1
2 1
M
3 21J 4
EA
AB
11 IE1
1 2 W±B
W±B
W± B
To Engine Contr ol
Module< 2±13>A 3
A/ C SI NGLE
PRESSURE SW
W 4
WATER TEMP. SW To A/C Amplifier
< 24±7>
N 4
NOI S E FI LTE R
(
Rear Window Def ogger)J 7
JUNCTI ON
CONNECTOR
JUNCTION
CONNECTORB A J27 J28,
A 1
A/ C CONDENS ER FAN
MOTOR
DEF
RELAYFAN NO. 2
REL AYFA N NO. 3
RELAY
AA 13
AA
V±Y V±Y V±Y V±Y
W±B
W±B W±B
L±W W± BLGL±W R± W
W± G G± W
B±Y
W
WB
1 I15
IGNITION SW15 A
W±G
2
11GR ±R GR3 MPX± MPX+
FAN NO. 1
RELA Y
GR±R
W±B W±B R 1
RADI A TOR FA N
MOTO R 30A
CDS FAN
Rear W indow Defogger
1B 3
ACC
IG1
ST1 AM1
DFG
BODY ECUA B 8
10A GAUGE
REA R WI N DOW DEFOGGE R R± W
W
2 11
2
C1 1
COMB I NATI ON
METEREA
V± Y
To A/C Amplifier
< 24±6>
MPX+
PSG
SW
RDEF
REAR WI NDOW
DEFOGGER SW A 7
A/ C AMPL I FI ER
MPX +B±Y

ENGINE ± 1NZ-FXE ENGINE
182EG10
171EG17
From Heater
To Heater
To Radiator
From Radiator
Water Pump
Cylinder Head
Heater Core
Throttle Body
Radiator Cylinder Block Bypass
Passage
Water Pump
Thermostat53
COOLING SYSTEM
1. General

The cooling system is a pressurized, forced-circulation type.

A thermostat with a bypass valve is located on the water inlet housing to maintain suitable temperature
distribution in the cooling system.

The flow of the engine coolant makes a U-turn in the cylinder block to ensure a smooth flow of the engine
coolant.

The radiator for the engine and the A / C condenser have been integrated to minimize the space they occupy
in the engine compartment.

ENGINE ± 1NZ-FXE ENGINE
182EG11
Radiator
Condensor
RadiatorCondensor
Cutout 54
2. Radiator
The radiator for the engine and the A / C condenser have been integrated to minimize the space they occupy
in the engine compartment. Cutouts have been provided between the radiator and condenser sections to pre-
vent the transfer of heat between the two sections.

ENGINE ± 1NZ-FXE ENGINE62
ENGINE CONTROL SYSTEM
1. General
The engine control system for the 1NZ-FXE engine has following system.
System
Outline
SFI
Sequential Multiport
Fuel InjectionAn L-type SFI system directly detects the intake air volume with a hot-wire
type mass air flow meter.
ESA
Electronic Spark
AdvanceIgnition timing is determined by the ECM based on signals from various
sensors. The ECM corrects ignition timing in response to engine knocking.
VVT-i
Variable Valve
Timing-intelligentControls the intake camshaft to an optimal valve timing in accordance with
the engine condition.
ETCS-i
Electronic
Throttle Control
System-intelligentOptimally controls the throttle valve opening in accordance with the ECM,
and the conditions of the engine and the vehicle, and comprehensively
controls the ISC and cruise control system.
Fuel Pump Control
Fuel pump operation is controlled by signal from the ECM.

To stop the fuel pump during operation of the SRS airbag.
Oxygen Sensor Heater
ControlMaintains the temperature of the oxygen sensors at an appropriate level to
increase accuracy of detection of the oxygen concentration in the exhaust gas.
Evaporative Emission
Control

The ECM controls the purge flow of evaporative emissions (HC) in the
charcoal canister in accordance with engine conditions.

Using 3 VSVs and a vapor pressure sensor, the ECM detects any
evaporative emission leakage occurring between the fuel tank and the
charcoal canister, and vapor reducing fuel tank through the changes in the
tank pressure. For details, see page 79.
Toyota HCAC System
The ECM controls the VSV (for Toyota HCAC System) to improve the clean
emission performance of the exhaust gas when the temperature of the TWC
is low. For details, see page 58.
Air Conditioning
Cut-Off ControlBy turning the air conditioning compressor OFF in accordance with the
engine condition, drivability is maintained.
Cooling Fan ControlRadiator cooling fan operation is controlled by signals from ECM based on
the engine coolant temperature sensor signal (THW).
HV Immobiliser
Prohibits fuel delivery, ignition, and starting the HV system if an attempt is
made to start the HV system with an invalid ignition key. For details, see page
80.
DiagnosisWhen the ECM detects a malfunction, the ECM diagnoses and memorizes
the failed section.
Fail-SafeWhen the ECM detects a malfunction, the ECM stops or controls the engine
according to the data already stored in memory.

THS (TOYOTA HYBRID SYSTEM)
182TH26
Inverter
Converter
182TH15
Inverter
HV
Battery
Ignition Signal
Ground
Voltage
Detection
Circuit
Voltage
Detection
Circuit
Bridge Circuit for MG2
Amperage
Sensor
Signal Processor /
Protective Function Processor
Bridge Circuit for MG1
Amperage
Sensor
MG2
HV ECU
MG1
182TH27
Reservoir Tank
Radiator
Water Pump35
INVERTER
1. General
The inverter is an electric power converter that
converts the direct current of the Hybrid vehicle's
high-voltage battery (DC 273.6 V) and the alter-
nating current of the MG1 and MG2.
Consisting of 2 three-phase bridge circuits for
MG1 and MG2, respectively, and each containing
6 power transistors, the inverter converts direct
current and three-phase alternating current. The ac-
tivation of the power transistors is controlled by the
HV ECU. In addition, the inverter transmits in-
formation that is needed for current control, such as
the output amperage or voltage, to the HV ECU.
Together with MG1 and MG2, the inverter is
cooled by the dedicated radiator of the coolant
system that is separate from that of the engine.
2. System Diagram
3. Cooling System
A cooling system via water pump for the inverter
and MG1, 2 has been added.
The HV ECU controls the water pump with cool-
ant temperature.
It is separated with the engine cooling system.

BODY ELECTRICAL ± AIR CONDITIONING 152
AIR CONDITIONING
DESCRIPTION
The air conditioning system in the Prius has the following features:
Both heating and demisting performances are realized by adopting performances are realized by adopting
the 2-way flow heater type air conditioning unit.
A multi-tank, super-slim structure evaporator has been adopted.
An automatic air conditioning system which provides enhanced air conditioning comfort according to the
occupant's senses has been adopted.
A semi-center location air conditioning unit, in which the evaporator and heater core are placed in the ve-
hicle's longitudinal direction, has been adopted.
A compact, high-performance scroll compressor with oil separator has been adopted.
The heat exchange efficiency has been improved through the adoption of the sub-cool condenser.
This condenser is integrated with the radiator to minimize the space they occupy in the engine compart-
ment.
A compact, lightweight, and highly efficient straight flow (full-path flow) aluminium heater core has been
adopted.
This heater core is integrated with a PTC (Positive Temperature Coefficient) heater, which excels in heat-
ing performance.
PTC heaters have been provided in the air duct at the footwell outlet in front of the air conditioning unit.
However, air conditioning without the PTC heaters is offered as an option on the U.S.A. models.
An electrical water pump with a bypass valve that provides a stable heater performance even if the engine
is stopped due to a function of the THS (TOYOTA Hybrid System) has been adopted.
A clean air filter that excels in removing pollen and dust is standard equipment.