2001 TOYOTA PRIUS key

2001 PRIUS (EWD414U)
B HOW TO USE THIS MANUAL
The ground points circuit diagram shows the connections from all major parts to the respective ground points. When
troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify
the problem ground quickly. The relationship between ground points (
EA, IB and IC shown below) can also be
checked this way.

I GROUND POINT
FAN MAIN RELAY
FAN MAIN RELAY
A/C FAN RELAY NO.2
A/C FAN RELAY NO.3
RADIATOR FAN MOTOR
RETRACT CONTROL
RELAY
RETRACT MOTOR RH
RETRACT MOTOR LH
FRONT TURN SIGNAL
LIGHT RH
PARKING LIGHT RH
FRONT TURN SIGNAL
LIGHT LH
PARKING LIGHT LH
DOOR LOCK CONTROL
SW RH
DOOR KEY LOCK
SW RH
DOOR LOCK MOTOR
RH
BLOWER RESISTOR
A/C AMPLIFIER
RADIO AND PLAYER
HEATER RELAY
AUTO ANTENNA
MOTOR
BLOWER SW
PARKING BRAKE SW
COMBINATION METER
HORN SW [COMB. SW]
TURN SIGNAL FLASHER
DOOR KEY LOCK SW LH
DOOR LOCK MOTOR LH
FUEL CONTROL SW
WOOFER AMPLIFIER
COMBINATION METER
COMBINATION METER
FUEL SENDER
CIGARETTE LIGHTER
O/D MAIN SW
CLOCK
5
5
5
5
4
4
4
4
4BA15
IB18
EA2 10
3E5
3E
6 3G
13 3F
3 3D
1 3B
7
ID115
IC33
IA12
E 3
A
A AW±B
W±BW±B W±B
W±B W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B W±BW±B W±B W±B W±B
W±B W±B
W±BW±B
W±B
W±B
W±B W±B
W±B
BR
W±B
BR BRW±BW±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B W±B
W±B
W±B
W±B
W±B
BR W±B
BR BR
BR W±B W±BW±B
W±BW±BBR W±B (4A±GZE)
W±B A A A
I 6
I 6
I 2
I 2
I 2
B 5I 5
I 5
I 5
B 5
B 5
B 5
I 5
I 5
I 3I 3
E 3
E 3
E 3
E 2
E 4
E 5
E 4
E 5
E 6E 4
E 4
B 4
EAI 4
B 4
B 4
I 4I 8
IBIC
3C7
4
JUNCTION
CONNECTOR J 1
4
DOOR LOCK CONTROL
RELAY
ELECTRICAL IDLE-UP
CUT RELAY (M/T)FRONT SIDE MARKER
LIGHT RH
FRONT SIDE MARKER
LIGHT LH
BRAKE FLUID LEVEL
WARNING SW
UNLOCK WARNING
SW WIPER AND WASHER
SW [COMB. SW] LIGHT CONTROL SW
[COMB. SW] HEATER CONTROL
ASSEMBLY
HEATER SERVO
MOTOR AMPLIFIER
DIMMER SW
[COMB. SW]
CRUISE CONTROL
MIRROR SW
REAR WINDOW
DEFOGGER SW
POWER WINDOW
MASTER SW
POWER WINDOW
CONTROL RELAY
DOOR LOCK CONTROL
SW
REMOTE CONTROL
MIRROR SW
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

2001 PRIUS (EWD414U)
B
The ºCurrent Flow Chartº section, describes which parts each power source (fuses, fusible links, and circuit breakers)
transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system
are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully
understood.
Theft Deterrent and Door Lock Control
J POWER SOURCE (Current Flow Chart)
11
1
EA1 1EA2 3
7
EB16
E 6
E 7I 2I 2
I 2
E 7
E 7
E 7
2
1
1
2
2
2
2
2
B
B
W W
B B B B BW±B
B
B
B B±O
B±W
W±B
B±W STARTER RELAY INJECTION RELAY15A HAZ±RADIO7.5A AM250A MAIN 1.25B FL MAIN
BATTERY
WWW
W W W
R W±L
W
W
G±W
G
15A TAIL
20A DEFOG
15A RAD CIGTA I L
RELAY 7.5A DOME 40A DOOR LOCK CB
2 1
1 2
4 8
2 3
3 4
G
W±R
P±L B±Y
B±Y
W±R
AM2 IG2
ACC
IG1AM1W W
W±R
W W
W±B
21
1
1
1
1
2
2
2
2
3
4
3
4 1
2
1
22
1
11
1
IGNITION SW I 8
Battery
30A AM2
2
Starter S 220A RADIO NO.1
10A HORN
15A EFI
7.5A DOMEShort Pin
10A HAZARD
The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
Engine Room R/B (See Page 20)
ABS
ABS and Traction Control
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Multiplex Communication System
Cigarette Lighter and Clock
Key Reminder and Seat Belt Warning STOP
Fuse Page
194
214
11 2
System
DOME 20A
10ACombination Meter
Headlight
Interior Light
2
2
6 100A ALT
EB1
POWER SOURCE
Light Auto Turn Off187
180
166
210
230
122
10A ECU±B
5 60A ABS
2
6 Fusible Link Block2
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

2001 PRIUS (EWD414U)
B
[A]: Part Code
[B]: Part Name
[C]: Part Number
Toyota Part Number are indicated.
Not all of the above part numbers of the connector are established for the supply. In case of ordering a connector
or terminal with wire, please confirm in advance if there is supply for it using
ªParts Catalog Newsº (published by
Parts Engineering Administration Dept.).
A 5
90980±11194
L PART NUMBER OF CONNECTORS
Code Part Name Part NumberCode Part NamePart Number
A 1
A 2
A 4
A 6
A 7A/C Ambient Temp. Sensor
A/C Condenser Fan Motor
A/C Triple Pressure SW (A/C Dual and
Single Pressure SW)
A/T Oil Temp. Sensor
ABS Actuator
ABS Actuator90980±11070
90980±11237
90980±10943
90980±11413
90980±11151D 4
D 5
D 6
D 7
D 8
D 9
D10
D11Diode (Door Courtesy Light)
Diode (Key Off Operation)
Diode (Luggage Compartment Light)
Door Lock Control Relay
Door Courtesy Light LH
Door Courtesy Light RH
Door Courtesy SW LH
Door Courtesy SW RH90980±11608
90980±10962
90980±11608
90980±10848
90980±11148
90980±11097
A 8ABS Speed Sensor Front LH
90980±10941
A 9ABS Speed Sensor Front RH
90980±11856 A10Airbag Sensor Front LH
A11Airbag Sensor Front RHD12Door Courtesy SW Front LH
90980±11156 D13Door Courtesy SW Front RH
D14Door Courtesy SW Rear LH
Door Courtesy SW Rear RH
D15
[B] [C]
A12
Auto Antenna Motor90980±11194 A 3
A/C Condenser Fan Relay90980±10940
[A]
90980±11009
90980±11002
D16
D17Door Key Lock and Unlock SW LH
Door Key Lock and Unlock SW RH90980±11170

2001 PRIUS (EWD414U)
E
RELAY
Basically, an electrically operated
switch which may be normally
closed (1) or open (2).
Current flow through a small coil
creates a magnetic field which either
opens or closes an attached switch.
1. NORMALLY
CLOSED
2. NORMALLY
OPEN
SWITCH, MANUAL
Opens and closes
iitth b
SPEAKER
An electromechanical device which
creates sound waves from current
flow.
RELAY, DOUBLE THROW
A relay which passes current
through one set of contacts or the
other.
circuits, thereby
stopping (1) or
allowing (2) current
flow.1. NORMALLY
OPEN
2. NORMALLY
CLOSED
RESISTOR
An electrical component with a fixed
resistance, placed in a circuit to
reduce voltage to a specific value.SWITCH, DOUBLE THROW
A switch which continuously passes
current through one set of contacts
or the other.
RESISTOR, TAPPED
A resistor which supplies two or
more different non adjustable
resistance values.SWITCH, IGNITION
A key operated switch with several
positions which allows various
circuits, particularly the primary
ignition circuit, to become
operational.
RESISTOR, VARIABLE or RHEOSTAT
A controllable resistor with a variable
rate of resistance.
Also called a potentiometer or
rheostat.
SENSOR (Thermistor)
A resistor which varies its resistance
with temperature.SWITCH, WIPER PARK
Automatically returns wipers to the
stop position when the wiper switch
is turned off.
(Reed Switch Type)
SENSOR, SPEED
Uses magnetic impulses to open
and close a switch to create a signal
for activation of other components.TRANSISTOR
A solidstate device typically used as
an electronic relay; stops or passes
current depending on the voltage
applied at ºbaseº.
SHORT PIN
Used to provide an unbroken
connection within a junction block.WIRES
Wires are always drawn as
straight lines on wiring
diagrams.
Crossed wires (1) without a
black dot at the junction are
tj i d
(1) NOT
CONNECTED
SOLENOID
An electromagnetic coil which forms
a magnetic field when current flows,
to move a plunger, etc.
j
not joined;
crossed wires (2) with a
black dot or octagonal ( )
mark at the junction are
spliced (joined)
connections.
(2) SPLICED

2001 PRIUS (EWD414U)
G
Position of Parts in Instrument Panel
G 1 Gateway ECU
H 7 Hazard Warning SW
H 8 Hazard Warning SW
H 9 Heated Oxygen Sensor (Bank 1 Sensor 2)
H 10 Hybrid Vehicle Control ECU
H 11 Hybrid Vehicle Control ECU
H 12 Hybrid Vehicle Control ECU
H 13 Hybrid Vehicle Control ECU
H 14 Hybrid Vehicle Control ECU
I 15 Ignition SW
J 1 Junction Connector
J 2 Junction Connector
J 3 Junction Connector
J 4 Junction Connector
J 5 Junction Connector
J 6 Junction Connector
J 7 Junction Connector
J 8 Junction Connector
J 9 Junction Connector
J 10 Junction Connector
J 11 Junction Connector
J 12 Junction Connector
J 13 Junction Connector
J 14 Junction Connector
J 15 Junction Connector
J 16 Junction Connector
J 17 Junction Connector
J 18 Junction Connector
J 19 Junction Connector
J 20 Junction Connector
J 21 Junction ConnectorJ 22 Junction Connector
J 23 Junction Connector
J 24 Junction Connector
J 25 Junction Connector
J 26 Junction Connector
J 27 Junction Connector
J 28 Junction Connector
J 29 Junction Connector
L 1 Light Control Rheostat
M 5 Multi Display
M 6 Multi Display
M 7 Multi Display
P 1 Park/Neutral Position SW
P 2 Parking Brake SW
P 3 PTC Heater
P 4 PTC Heater
R 2 Radio and Player
R 3 Radio and Player
R 4 Radio and Player
R 5 Remote Control Mirror SW
S 2 Shift Lock ECU
S 3 Stop Light SW
T 4 Transponder Key Computer
T 5 Turn Signal Flasher Relay
U 1 Unlock Warning SW and Key Interlock Solenoid
W 5 Wireless Door Control Receiver

2001 PRIUS (EWD414U)
G ELECTRICAL WIRING ROUTING
Position of Parts in Body
A 23 ABS Speed Sensor Rear LH
A 24 ABS Speed Sensor Rear RH
B 15 Battery Blower Motor
B 16 Battery Blower Motor Controller
B 17 Battery ECU
B 18 Battery ECU
B 19 Battery Fan Relay
B 20 Buckle SW and Tension Reducer LH
B 21 Buckle SW RH and
Seat Belt Warning Occupant Detection Sensor
D 6 Door Courtesy SW Front LH
D 7 Door Courtesy SW Front RH
D 8 Door Courtesy SW Rear LH
D 9 Door Courtesy SW Rear RH
D 10 Door Lock Control SW Front RH
D 11 Door Lock Motor and Door Unlock Detection SW
Rear LH
D 12 Door Lock Motor and Door Unlock Detection SW
Rear RH
D 13 Door Lock Motor, Door Key Lock and Unlock SW and
Door Unlock Detection SW Front LH
D 14 Door Lock Motor, Door Key Lock and Unlock SW and
Door Unlock Detection SW Front RHF 14 Front Door Speaker LH
F 15 Front Door Speaker RH
F 16 Fuel Pump and Fuel Sender
F 17 Fusible Link Block No.2
F 18 Fusible Link Block No.2
H 15 High Mounted Stop Light
H 16 Hybrid Vehicle Battery
H 17 Hybrid Vehicle Battery
I 16 Interior Light
I 17 Interlock SW
J 30 Junction Connector
J 31 Junction Connector
J 32 Junction Connector
J 33 Junction Connector
L 2 License Plate Light LH
L 3 License Plate Light RH
L 4 Luggage Compartment Door Unlock SW
L 5 Luggage Compartment Light
L 6 Luggage Compartment Light SW

2001 PRIUS (EWD414U)
POWER SOURCE
HEAD RELAY
2±1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position
Closed with the engine running and the parking brake pedal released (Parking brake SW off) [w/ Daytime running light]
TAIL RELAY
5±3 : Closed with the light control SW at TAIL or HEAD position
I15 IGNITION SW
2±3 : Closed with the ignition key at ACC or ON position
2±4 : Closed with the ignition key at ON or ST position
7±6 : Closed with the ignition key at ON or ST position
7±8 : Closed with the ignition key at ST position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
F10A34F13D34I1537
F11B34F17A38
F12C34F18B38
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
324Engine Room R/B No.3 (Engine Compartment Right)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1B27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)1J27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2B
2C30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2D
()
2G31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)2H31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
SERVICE HINTS

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 L±B
L±BL
W±B
LL±RL±RG±Y
B
W± G
IGCT RELAYG± Y G±Y
G±Y
G± Y W± B G±Y G±YG±Y
W±BL LG±R
BATTERY BLOWER MOTOR B15
BATTERY FAN
RELAY B19
BATTERY ECUB B17 , B18A
JUNCTION
CONNECTORB J 2 A , J 3
HYBRID VEHICLE CONTROL ECUA H10 , H11CB, H12 E, H13 D, H14
BATT
W± G7MREL
O
G±Y
JUNCTION
CONNECTOR J 7
JUNCTION
CONNECTOR J 1
* 2 : HIGH VOLTAGE (
273. 6V)
BI B
B
JUNCTION
CONNECTOR J32 W± B W± BW± B
FCVC
7D
B±W
8
HEVC ABFS
3E
L
23
GSW2
TRANSPONDER
KEY COMPUTER T 4 AIRBAG SENSOR
ASSEMBLY A18
A
W
8A A AA
B C
WJUNCTION
CONNECTORB J22 A , J23
IF1 3
BATTERY
MOTOR
BLOWER
CONTROLLER B16
678910
W
R
R
G
G
W
W
W
W
HYBRID VEHICLE
BATTERYB H16 , H17A
SENSOR