2001 TOYOTA PRIUS key battery

2001 PRIUS (EWD414U)
M OVERALL ELECTRICAL WIRING DIAGRAM
1
234
9 PRIUS
Power SourceKey Reminder and
Light Reminder BuzzerS e a t B e lt W a r n in g
1120A MAIN 1 00A DC/ DC
2ACC
IG1
ST1 AM1 4
2 1
3 5
5A AM1
2B 3 2D 62H1
2 1
3 5
10A GAUGE
DB
EA AB
AA
ID Cowl side
panel LHA2K 8
1D 1B2A 5
WB±GW± B W± BL±B
J11
JUNCTION
CONNECTOR
IG1 RELAY
F18
FUSIBLE LINK
BL OCK NO. 2
BATTERYU 1
UNLOCK
WAR NI NG S W
TAIL RELAY
J22 J23,
JUNCTI ON
CONNECTORAB 17 B
7. 5A TAIL
2ID22C 9
AB
AA 2K 62K1
11 IJ1A A 8IJ1
10 IJ11 3 9IJ13B
See Headlight
System< 3±1> < 4±3>
11 BB 2B18 16 A 5 B15 A 2 B 3 B 22 A
62A
2B 7 14 A
IH Right kick
panel C10 C11,
COMBI NATI ON ME TERAB
B20
BUCKLE SW LH J29
JUNCTI ON CONNECTOR
B21
B UCK LE S W RH A ND
SEAT BELT WARNI NG
OCCUPANT DETECTI ON SE NSOR G 1
GATEWAY ECUA 7
A/ C AMPLI FI ER
E10
ENGI NE
CONTROL
MODULE
1 2 14
11
4 13
11
B 8 B 9,
BODY ECUAB
W±B
W±B W±B
LG LG P±L P±L W±B W±BW±B W±B G±O G±O G±O
G±O
GR± B
GR GR
GR± B GR± BLBR
W±G
W
W± G
B±Y
4 MPX2
MPD1
MP X+ MPX1
MPD2
MP 2+
Light Auto Turn O ff
I15
IGNITION SW
3 12
See Interior
Light System
< 10±2> GR ±LL
GR±L
See Taillight
System< 7±1>
1BW±B
2D 8
FB
BA BA
L±B
From Transponder
Key Computer
< 2±16>
From Airbag Sensor
Assembly< 21±2>G±O
A
W±B
W±B
17 15
G± O2 To Airbag
Sensor Assembly
< 21±3>
21
L±B 1C
FUSIBLE LINK BLOCK NO. 1C B F1 1 F12, DF1 3 ,
B
1B 2
15A DOME
1J 72A 4
2G 2L±YJUNCTI ON
CONNECTORB A J24 J25,
J27 J28,
JUNCTI ON
CONNE CTORAB
LSEAT BEL T
(
Driver' s Seat)
SEAT BELT
(
Fr ont Pass enger' s
Sea t)
21 A
L
BUZZER 2C 5
7. 5A ECU±B
9BR± GJ27
JUNCTI ON
CONNE CTOR F
F L
R±G
TAI L I G B HRLY H T MPX± MPX+ DBKL
E TRLY KSW DCTY PKBL

2001 PRIUS (EWD414U)
M
1
234
10 PRIUS
2ACC
IG1
ST1 AM1 4
1
120A MAIN
1C 1B
1D2H 1
5A AM1
2 1
3 52B 3 2D 6
ID Cowl side
panel LH2K 8
AW±B W± B B±Y W±GW
BB± G W±GJ11
JUNCTI ON
CONNECTOR I15
IGNITION SW
100 A DC/ DCBATTERYF18
FUSI BLE L I NK
BLOCK NO. 2F11 F12,
FUSIBLE LINK
BL OCK NO. 1BCF13, DIG1
REL AY
W
2A 51B 2
15A
DOME
1J 7
2N 32G 2 2A 4
22 A 21 A 2C 5
9B2B 3B
16 A 15 A
EA EA
2 1
BI Left side of
rear pillarDB 12 A
13 I D2
11113IB1DAFB2K 12L62K3
1 1 2 DB
DAEB
DA 4IF1
12
DOOROFFON
2N 1 14 A
IH Right kic k
panel14 A
2A 7
2B 6
Interior Light Power Source4
F144
A
B 15
6 31311 11
F
B AR±GGR ±B GR ±BL B
R± B
R±WL±YB
L±Y L±Y L±Y
R± WW±B W±B
R± W
R± W R± B
R
R± G R±GR
R± W R± W R±W
R± W R± W
R± W R± G GR± BGR GR ±LGR GR± BL L±Y
LJ27
JUNCTI ON
CONNE CTOR E10
ENGINE CONTROL
MODULE G 1
GATEWAY
ECUA 7
A/ C AMPLI FI ER
7. 5A ECU±B
10A GAUGEJUNCTION
CONNECTORB A J12 J13, R±W
J16
JUNCTION
CONNECTOR
D 7
DOOR COURTESY SW
FRONT RH D 6
DOOR COURTESY SW
FRONT L H D 8
DOOR COURTESY SW
REA R LH D 9
DOOR COURTESY SW
REA R RH
J33
J UNCTI ON
CONNE CTOR
P 5
PERSONAL LI GHT
L 5
LUGGAGE
COMPARTMENT
LIGHT
J UNCTI ON
CONNE CTORB A J30 J31, JUNCTION
CONNECTORB A J30 J31,
I16
I NTE RI OR L I GHT
7
LBR BR
L 6
LUGGAGE
COMPARTMENT
LIGHT SW
COMBINATION METERB A C1 0 C11,
B 8 B 9,
BODY ECUABMP 2+ MP D1
MPX1
DA
R± W
31
2R± W R±YA
7IC1
R±Y
Fr om Power Window
Master SW< 18±2>MP X+ MP D2
MPX2
FB R± W
Fr om Trans ponder
Key Computer< 2±16>L±Y
D OORD 4
DIODE
(
Door
Co ur t esy)MPX± MPX+ B IG
LP LCTY RCTY DCTY PCTY
1BE
2D 8
W± B

2001 PRIUS (EWD414U)
M OVERALL ELECTRICAL WIRING DIAGRAM
1
234
13 PRIUS
Power Source S hift Lock Electric Tension Reducer
1120A MAIN 1 00A DC/ DC
2ACC
IG1
ST1 AM13
4
2 1
3 55A
AM1 2B 3 2D 62H1
5A
ECU±I G 2C 42I22C8
2 1
3 5
10A
ACC
D D
B B
1ID25ID1 CA
CB12 IJ1
2 1
1 3
11 IJ1
3 4
E E
DB DB
EA
IDCowl si de
panel LH A2K 8
1D 1B2D 2
W± B W±G B±YP±L
WB±GW±B W±BW±B W±B LW±BW±BW±B W± B G B±Y
B±Y B±Y B±Y
GR± R
G±W G± W GR±R GR± R
GR± R
61 3
54
J11
JUNCT I ON
CONNECTORIG1
RELA Y
F18
FUSI BL E LI NK
BL OCK NO. 2
BATTERYJ26
JUNCTION
CONNECTORJ21
JUNCTI ON
CONNECTORT 6
T ENSI ON RE DUCE R
SOLENOID
B20
T ENSI ON RE DUCE R
LH[BUCKLE SW LH]
S 2
SHI FT LOCK ECU ACC
RE LAY
F1 1 F13,
FUSI BL E LI NK
BL OCK NO. 1BDJ27 J28,
JUNCTION
CONNECTORABJ14
JUNCTI ON
CONNECTOR
J24 J25,
JUNCTION
CONNECTORABFrom Stop Light
SW< 3±4>AB
AA AA
J22 J23,
JUNCTI ON
CONNECTORAB
W± BU 1
KEY I NTERLOCK
SOL ENOI D
[ UNL OCK WARNI NG S W]
J21
JUNCTI ON
CONNECTOR I15
IGNITION SW
P±L
B± Y
B± Y
W
W±G
STP ACC I G
EKLS+ 2D 8
W±B
W±B
D
D
12 3
2
1
B L±RY B R
P1
P
P2
SLS+
SLS±SHIFT LOCK
CONTROL SW
SHIFT LOCK SOLENOIDLOCK
FREE

2001 PRIUS (EWD414U)
M OVERALL ELECTRICAL WIRING DIAGRAM
1
234
15 PRIUS(
Cont. next page)
2ACC
IG1
ST1 AM1 4
1
120A MAIN
1B
1D2H 1
5A AM1
2 1
3 52B 3 2D 6
IDCowl si de
panel LH 2K 8
AW±B W± B W±GW
WB±G
J11
JUNCTION
CONNECTOR I15
IGNITION SW
100 A DC/ DCBATTERY
F18
FUSI BLE LI NK
BL OCK NO. 2 F1 1 F12,
FUSI BL E LI NK
BL OCK NO. 1BC
IG1
RELAY
10A GAUGE
30A DOOR
AB
AA AA 2D 81B
1 2 2C 9
W±GW± B W± BL±BL±B W±B
W± BB 8 B 9,
BODY ECUAB
J24 J25,
JUNCTION
CONNECTORAB
Door Lock Control
U 1
UNLOCK
WARNI NG SW 12
IG1 2
G
B 10
MIC1 5 IG1 7 A 6
5IG1
See Power Window
System< 18±2> YYL±BW±B G±YW RRG18
654 1 2
3 15 6 10 16DCTY
LOCK
KUL KL L SWD MP X1
D13
DOOR L OCK MOTOR, DOOR KEY
L OCK A ND UNL OCK SW A ND
DOOR DETECTI ON SW FRONT L HUNLOCKP 9
P OWE R WI N DOW
MASTER SW
W±B W±B2L 62K312 A
2K 1
See Interior Light System
< 10±2> < 10±3>
63 B±Y
A
W±B
Power Source
815
7. 5A ECU±B
2C 5F
FJ27
J UNCTI ON
CONNE CTORR± G R± G
9B
BA BA
DB
L±B
Fr om Trans ponder
Key Computer< 2±16>
JUNCTI ON
CONNE CTORB A J27 J28,
1C1B 21J 72G2
2D 4
1IG1B L±Y L±Y
, F13 D
CPUB
5L±Y
15A
DOMEL±YB
B I G E KSW RCTY PCTY DCTY RX ACTD
BA
CB
L±Y
JUNCTION CONNECTORB J24 A , J25

NEW MODEL OUTLINE
MAIN EQUIPMENT
182MO23(For U.S.A.)
Glove box Accesory box Multi-box
Front door pocket
Seat back pocket
(Driver's and
passenger seat)
182MO24182MO09
182MO25
Small storage box
Cup holder
(for two caps use)11.839ft3 (by SAE suitcase method)
luggage space is secured.182MO26182MO27182MO28
18
Air Conditioning
An automatic air conditioning has been adopted
in consideration to ease of use.

A clean air filter which removes pollen and
dust is included as a standard fitting for puri-
fying the air inside the cab.

Two air conditioning modes, A/C for eco-
nomical air conditioning and MAX for espe-
cially strong air conditioning, are provided.
Wireless Door Lock Remote Control System
With the wireless door lock remote control system, all the doors can be locked and unlocked by signals emitted
by the transmitter.
Power Window System
A power window system which enables all windows to be raised or lowered with switches has been adopted.
An auto up/down function and jam protection function have been added to the driver's power window.
HV Immobiliser System
HV immobiliser system will not allow the HV system to be started by duplicate key is used. This system
will permit the HV system to be started only when the ID code of the transponder chip impregnated in the
key matches the ID code registered beforehand in the transponder key amplifier.
Theft Deterrent System
When an attempt is made to forcibly enter the vehicle or open the hood or trunk lid without a key, or when
the battery terminals are removed and reconnected, this system sounds the horn and flashes the headlights,
taillights and emergency flashers for about 1 minute to alert the owner. At the same time, it locks all the
doors.
Storage Space
Ample storage space with an emphasis on practicality provided throughout the Prius.
Instrument panel (passenger seat)Seat back pocketFront door pocket
Center console boxLuggage space

THS (TOYOTA HYBRID SYSTEM)
182TH24
ªREADYº LightOutput Control
Warning Light 26
DRIVING CHARACTERISTICS
Because the Prius uses a parallel series hybrid system, some aspects of its operation may differ from those of
existing automobiles, and may require precautions that are unique to this system.
1. Starting the THS
Make sure that the parking brake is engaged and that the shift lever is in the P position.
While depressing the brake pedal, turn the ignition switch to the START position. After this, the ªREADYº
light flashes.
The engine does not start when the shift lever is in the N position; it can only start in the P position. When
the external air temperature is low, the ªREADYº light may flash longer than usual.
As soon as the engine has started, the ªREADYº light illuminates steadily and a beeping sound is heard.
Several seconds after the engine warms up, the engine stops automatically, provided that the air conditioning
compressor does not need to operate and that the HV battery maintains a proper SOC (state of charge).
2. Start-Off
While keeping the brake pedal depressed, release
the parking brake, and move the shift lever to the
D position.
The vehicle has the same creeping movement as
the conventional automatic transmission vehicles.
Gradually release the brake pedal and slowly de-
press the accelerator pedal to start off.
At this time, the vehicle starts off powered only by
the MG2 (Motor Generator No.2)
NOTICE: The vehicle can be started off, provided that the ªREADYº light remains illuminated, even
if the engine remains stopped.
3. Acceleration
Depress the accelerator pedal to accelerate the vehicle.
If the engine remained stopped during start-off, the engine will start automatically during acceleration.
4. Downhill Driving
Move the shift lever to the B position as necessary in order to simultaneously apply the regenerative brake
and the engine friction brake.
5. Deceleration and Stopping
Depress the brake pedal to decelerate and to stop the vehicle.
Depressing the brake pedal causes the regenerative brake to activate automatically in the D or B position. (In
the regenerative brake system, kinetic energy is converted to electrical energy.) If the engine has warmed up,
the air conditioning compressor does not need to operate, and if the HV battery maintains a proper SOC (state
of charge), the engine stops automatically when the vehicle speed drops-even if the vehicle comes to a stop.
6. Parking
Push down the parking brake pedal, move the shift lever to the P position, and pull out the ignition key.
NOTICE: Make sure to pull out the ignition key after parking the vehicle because the vehicle can be
driven as long as the ªREADYº light remains illuminated even if the engine is stopped.
7. Other Characteristics and Precautions

If a drive wheel slips on slippery terrain, causing the front wheels to spin faster than the rear wheels, the
THS effects control to limit the slippage by restraining the drive force. (This also protects the planetary
gear from damage.)

When the HV battery temperature is too high or low, the output control warning light illuminates, alerting
the driver that output power may be limited.
This is not 2 malfunction. This condition may be corrected by avoiding sudden acceleration /decelaration,
after which the light will go out.

When the vehicle is stopped and the shift lever is in the N position, electricity is not generated even if the
engine is running. If the vehicle remains stopped for a long time, make sure to move the shift lever to the
P position. In heavy traffic, keep the shift lever in the D position.

THS (TOYOTA HYBRID SYSTEM)
182TH21
Lead-calcium Alloy 42
AUXILIARY BATTERY
DESCRIPTION
The shielded, maintenance-free 12V battery (S34B20L) for the Prius is used.
Battery fluid is filtered into separators in order to reduce hydrogen gas released which occurs when the battery
is charged.
Therefore, battery fluid does not need to be replaced, as long as the specified battery is used.
HV IMMOBILISER SYSTEM
The HV immobiliser system has been designed to prevent the vehicle from being stolen. This system uses a
ECM that stores the ID code of the authorized ignition key. If an attempt is made to start the HV system using
an unauthorized key, the ECM prohibit fuel delivery and ignition, effectively disabling the engine.

BODY ELECTRICAL ± ACCESSORIES
182BE38
EMPS System
Abnormality WarningTHS Abnormality
Warning
HV Battery Warning
182BE39
178
3) Interrupt Screen
a. General
If an abnormal condition occurs in the ve-
hicle system, even if another screen is being
displayed, the interrupt screen automatically
indicates a warning to inform the driver of an
abnormality in the system. The warning in-
dication screen flashes for 5 seconds the
mark of the system in which the abnormality
occurred. Then, it illuminates and remains
displayed until the screen is switched or the
system is reinstated to normal.

List of Warning Display Items 
Warning Display ItemDescription of Warning
EMPS System
Abnormality WarningWhen an abnormality occurs in the EMPS (Electric Motor-assisted
Power Steering) system.
HV Battery Warning*When the HV battery voltage drops.
THS Abnormality
WarningWhen an abnormality occurs in the THS (TOYOTA Hybrid System).
*: While ªREADYº light is lighting.
b. HV Battery Warning
When starting THS (when turning the IG key to START position) and if HV battery is displayed in this
interrupt screen, it means that HV battery has abnormality.
4) On-screen
If the screen switches to another screen while
displaying a warning indication, the mark of
the system in which the abnormality occurred
is displayed at the top right area of the screen.
The displayed mark disappears when the sys-
tem is reinstated to normal.