ABS TOYOTA PRIUS 2001 Service Repair Manual

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W±R
7. 5A
GAUGE
1 2
34
4 8 7
2111134
1 2
3 4
1 2
B18
BL FROM POWER SOURCE SYSTEM (SEE PAGE 66)
R±L
R±L G
W±B W±B
W±B
W±BW±B
W±B
Y±GR
L 4
H17
R 6
DELAY
CIRCUIT S 6
B18
3 4
R 7
BV11
G±W G±R
G±R
G±R
G±R
G±W
G±W
(W/G)
(S/D) (S/D)
C 7
(SHIELDED) BV11I 5
L L
STOP LIGHT
15
7
TO ABS ECU
BO
50
15A
STOP
IBIB
REAR LIGHTS
WARNING LIGHT
[COMB. METER] 3C 3C
IE1 14 STOP LIGHT SW
STOP LIGHT RH
[REAR COMB. LIGHT RH]
STOP LIGHT RH
[REAR COMB. LIGHT LH]
HIGH MOUNTED
STOP LIGHT
[A]
[B]
[I]
[D]
[F]
[H]
[E]
[J]
[M]
[N][K]
[L]
[G]
[C]
LIGHT FAILURE SENSOR
2001 PRIUS (EWD414U)
B HOW TO USE THIS MANUAL
*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

To Ignition SW
IG Terminal
Test Light
Relay Light
SW 2 SolenoidDisconnectShort [A]
Disconnect
DisconnectSW 1Fuse Case
Short [B]
Short [C]
Pull Up
Press Down Press DownPull Up
2001 PRIUS (EWD414U)
C
FINDING A SHORT CIRCUIT
(a)Remove the blown fuse and disconnect all loads of the fuse.
(b)Connect a test light in place of the fuse.
(c)Establish conditions in which the test light comes on.
Example:
[A] ± Ignition SW on
[B] ± Ignition SW and SW 1 on
[C] ± Ignition SW, SW 1 and Relay on (Connect the
Relay) and SW 2 off (or Disconnect SW 2)
(d)Disconnect and reconnect the connectors while watching the
test light.
The short lies between the connector where the test light
stays lit and the connector where the light goes out.
(e)Find the exact location of the short by lightly shaking the
problem wire along the body.
CAUTION:
(a) Do not open the cover or the case of the ECU unless
absolutely necessary. (If the IC terminals are touched,
the IC may be destroyed by static electricity.)
(b) When replacing the internal mechanism (ECU part) of
the digital meter, be careful that no part of your body or
clothing comes in contact with the terminals of leads
from the IC, etc. of the replacement part (spare part).
DISCONNECTION OF MALE AND FEMALE
CONNECTORS
To pull apart the connectors, pull on the connector itself, not
the wire harness.
HINT : C h e c k t o s e e w h a t k i n d o f connector you are
disconnecting before pulling apart.

*The titles given inside the components are the names of the terminals (terminal codes) and are not treated as being
abbreviations.
2001 PRIUS (EWD414U)
ABBREVIATIONS D
ABBREVIATIONS
The following abbreviations are used in this manual.
ABS = Anti±Lock Brake System
A/C = Air Conditioning
COMB. = Combination
DC = Direct Current
ECU = Electronic Control Unit
EMPS = Electric Motor Power Steering
ESA = Electronic Spark Advance
EVAP = Evaporative Emission
HV = Hybrid Vehicle
J/B = Junction Block
LH = Left±Hand
PTC = Positive Temperature Coefficient
R/B = Relay Block
RH = Right±Hand
SFI = Sequential Multiport Fuel Injection
SRS = Supplemental Restraint System
SW = Switch
TEMP. = Temperature
VSV = Vacuum Switching Valve
w/ = With
w/o = Without

2001 PRIUS (EWD414U)
G ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
A 1 A/C Condenser Fan Motor
A 2 A/C Magnetic Clutch and Lock Sensor
A 3 A/C Triple Pressure SW
(A/C Dual and Single Pressure SW)
A 4 ABS Speed Sensor Front LH
A 5 ABS Speed Sensor Front RH
A 6 Ambient Temp. Sensor
B 1 Brake Actuator
B 2 Brake Actuator
B 3 Brake Actuator
B 4 Brake Fluid Level Warning SW
C 1 Camshaft Position Sensor
C 2 Camshaft Timing Oil Control Valve
C 3 Circuit Breaker Sensor
C 4 Converter
C 5 Converter
C 6 Crankshaft Position Sensor
D 1 DC Motor
E 1 Engine Coolant Temp. Sensor
E 2 Engine Hood Courtesy SWF 1 Front Airbag Sensor LH
F 2 Front Airbag Sensor RH
F 3 Front Parking Light LH
F 4 Front Parking Light RH
F 5 Front Side Marker Light LH
F 6 Front Side Marker Light RH
F 7 Front Turn Signal Light LH
F 8 Front Turn Signal Light RH
F 9 Front Wiper Motor
F 10 Fusible Link Block No.1
F 11 Fusible Link Block No.1
F 12 Fusible Link Block No.1
F 13 Fusible Link Block No.1
H 1 Headlight LH
H 2 Headlight RH
H 3 Heated Oxygen Sensor (Bank 1 Sensor1)
H 4 Horn
H 5 Hydraulic Booster
H 6 Hydraulic Booster

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
B 1B 1A1
D 1C131240A ABS NO. 1
1250A EMPS
1250A HTR3
12
123
3
3
3
3
1
3 1B3
1B1
21
1
42
341
42
3 1 1B2
1J9 W
W
W
W
W
FUSIBLE
LINK BLOCK NO. 1D F12 C , F1 3B F10 A , F1 1
30A CDS FAN
15A THRO15A EFI
10A HORN
10A TURN±HAZ
15A DOME
10A BATT FAN15A AM2
20A ABS NO. 3 20A HV
10A HEAD LO (
RH)
10A HEAD LO (
LH)
10A HEAD HI (
LH)
10A HEAD HI (
RH) SHORT PIN SHORT PIN
HEAD RELAY
BATTERY5A DC/DC±S
B±G
B
B
B
W± RW
30A HTR2
30A HTR1
10A ABS NO. 4 100A
DC/DC
120A
MAIN30A HEAD (
*1)
(
*2)
DIM RELAYW±R 12 12
30A RDI 50A HTR
2W±R
B±R
G
G±W
B±R
L2C2
2G1
1230A ABS NO. 2
3127. 5A DRL
3R±L 12(
*1)
(
*2)
1J 11
R
TO CONVERTER
A2
B±R
TO CONVERTER
FUSIBLE LINK
BLOCK NO. 2B F17 , F18A
1 5SHORT PIN
(
*2)

2001 PRIUS (EWD414U)
ABS
C 1
D 11B 215A
AM2 1J 92C 2
2G 176AM2 IG2
ST220A
ABS NO. 3
1K30A
ABS NO. 2
1K40A
ABS NO. 1 FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
3
22 22
24 13
24 13
22 2236 21433
33 3 IA214
B±G B W±R W±R
B±W
W±L
B
W±R R W±B LG±RG Y±G G± W
B±W
R
L±O
Y±B
B±L
LG±R
Y±G
G
G±W
W±B
HYDRO MTR
NO. 1 RELAY
HYDRO MTR
NO. 2 RELAY
ABS SOL RELAY
BATTERYFUSIBLE LINK
BLOCK NO. 2F18 FUSIBLE LINK
BLOCK NO. 1D F12 , F13C
1
120A
MAINIGNITION SW I15
Y±B L±OY±B 6411
22

2001 PRIUS (EWD414U)
ABS
B 8B17
ID 1 2C 7C 8C7
16 D D7A 12 A8
16 C C25A 4
24 C C15 C18 A 11 A7
9C C28A 3
27 C
1 2 A 16 A15
1 2 14 A A13
2 1 19 B B20
P
V
B
W
R
(
SHIELDED) (
SHIELDED)
(
SHIELDED)
B
W
R
(
SHIELDED) LG±R
W± B
W± B
R
G
P
L
P
L W± B
W± B
W± B
ASG3 EFR PFR VFR SG2 EREG PREG VREG SLR± SLR+
LBL GND3 GND4 FL+ FL± FR± RL+ RL±
A 24
IB1 2 IB1 1 IB1 5 BRAKE ACTUATORB B 1 , B 2A
BRAKE ECUB B10 , B11
A
ABS SPEED SENSOR
FRONT LH A 4
ABS SPEED SENSOR
FRONT RH A 5
ABS SPEED SENSOR
REAR LH A23
JUNCTION
CONNECTOR J11
BRAKE FLUID LEVEL
WAR NI NG SW B 4
C , B 3
A 12 A 9A5
10 A A22A 1
23 A
(
SHIELDED)
B
W
R
(
SHIELDED)
SG1 E2 PMC VCM
C , B12
D , B13
FSS FR+
I 1
BR (
SHIELDED)
(
SHIELDED)
(
SHIELDED)
(
SHIELDED) P
L