2001 TOYOTA PRIUS ABS

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

2001 PRIUS (EWD414U)
D 19 A 10 A6
5D D13A 2
20 D
2 1 11 B B12 B24 B16 B14 B22 B23 15 B C 13
IA2 18
1
(
SHIELDED)
B
W
R
(
SHIELDED) Y
BR
R±Y
LG
V
G
R
B
W R±Y R±Y
E20 30 18 17 4 10
E10A
ABS NO. 4 FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
3
D 22
+BS SG4 ERR PRR VRR
RSS RR+ RR± PKB HVI+ HVI± HVO+ HVO± RRO RLO
L
B 21
ABS SPEED SENSOR
REAR RH A24HYBRID VEHICLE CONTROL ECU H15
EMPS ECU
E 6
JUNCTION
CONNECTOR J12
PARKING
BRAKE SW P 2 I 3
BR±B
(
SHIELDED)
BRAKE ACTUATORB B 1 , B 2AC, B 3
BRAKE ECUB B10 , B11
AC, B12
D , B13
B A
A A
IG A
JUNCTION
CONNECTOR J1 7
(
SHIELDED)
W± B
JUNCTION
CONNECTORB J18 , J19A
W± B
J11
JUNCTION
CONNECTOR A
ID A A
AJ10
JUNCTION
CONNECTOR
(
SHIELDED)
W±B W±B
1
2
B 6
IG15A
ECU±IG
2I 2
B±Y
B EBE A D
C 20
BZ
GB±Y
IA2 13
G
1 2
JUNCTION
CONNECTORB J14 , J15ABRAKE WARNING
BUZZER B14
B±Y
B±Y
BUZZER
I 3
I 3
HVI+ HVI± HVO+ HVO±(
SHIELDED) (
SHIELDED)

2001 PRIUS (EWD414U)
ABS
2A 7
2B 6 B 18 B2
A 10 9A10A
GAUGE FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2A 5
22 A
A 14
IH B 3B10 B4
ID1 3 ID1 1 ID1 2
B±W
V±R
V±R
B±W
L L L L
GR±B GR GR
GR±LL BRGR±G W P±B P±B
WP±B
W
GR±GW±LP±B
GR±G
GR± B CE B
13 7 1414
11 11B 2
B 3
44 13
EA EA
DATA LINK CONNECTOR 3 D 2 JUNCTION
CONNECTOR J16
COMBINATION METERB C10 , C11A BRAKE ECUB B10 , B11AC, B12 D, B13
TC D/G TSWA SP1
ENGINE CONTROL
MODULE E10 A/C AMPLIFIER A 7
GATEWAY ECU G 1
MP2+ MPD1 MPX+ MPD2 MPX± MPX1
MPX2
MPX+GR±L
TC SIL TS2K 2
B 5
R±Y
BRL
R±Y
4
PKB 15A
STOP
2K 9
R±B
1 2
B 1
STPSTOP
LIGHT SW S 3
G± W G± W
JUNCTION
CONNECTOR J26
JUNCTION
CONNECTOR J22
CEB
BODY ECUB 8
A ABS
BRAKE
A 16
A 15
IP1 1IP12 A E
A EJUNCTION
CONNECTORJ14 A

2001 PRIUS (EWD414U)
1. INPUT SIGNALS
(1) Speed sensor signal
The speed of the wheels is detected and input to TERMINALS FL+, FR+, RL+ and RR+ of the brake ECU.
(2) Stop light SW signal
A signal is input to TERMINAL STP of the brake ECU when the brake pedal is depressed.
2. ABS SYSTEM OPERATION
During sudden braking the brake ECU has signals input from each sensor, which controls the current to the solenoid inside
the actuator and lets the hydraulic pressure acting on each wheel cylinder escape to the reservoir. The pump inside the
actuator is also operating at this time and it returns the brake fluid from the reservoir to the master cylinder, thus preventing
locking of the vehicle wheels.
If the brake ECU judges that the hydraulic pressure acting on the wheel cylinder is insufficient, the current on the solenoid is
controlled and the hydraulic pressure is increased. Holding of the hydraulic pressure is also controlled by the brake ECU, by
the same method as above. Pressure reduction, holding and increase are repeated to maintain vehicle stability and to
improve steerability during sudden braking.
A4, A5 ABS SPEED SENSOR FRONT LH, RH
2±1 :1.4±1.8 kW (20°C, 68°F)
A23, A24 ABS SPEED SENSOR REAR LH, RH
2±1 :1.04±1.3 kW (20°C, 68°F)
B10 (A), B11 (B), B12 (C), B13 (D) BRAKE ECU
(B) 6, (C) 1±GROUND : Approx. 12 volts with the ignition SW at ON position
(D) 22±GROUND : Always approx. 12 volts
(A) 6, (A)31±GROUND : Always continuity
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A434C10A36J1037
A534C11B36J1137
A736D236J1237
A2338E636J14A37
A2438E1036J15B37
B1A34F12C34J1637
B2B34F13D34J1737
B3C34F1838J18A37
B434G137J19B37
B8A36H5A34J2237
B10A36H6B34J2637
B11B36H1538P237
B12C36I1537S337
B13D36J137
B1436J737
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
223Engine Room R/B No.2 (Right Side of Reserve Tank)
324Engine Room R/B No.3 (Engine Compartment Right)
SYSTEM OUTLINE
SERVICE HINTS

2001 PRIUS (EWD414U)
ABS
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1B
1J27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
1K
gg(g)
2A
2B30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2C
()
2G31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
2I31Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)2K31Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IA242Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)
IB142Floor Wire and Cowl Wire (Cowl Side Panel LH)
ID142Instrument Panel Wire and Cowl Wire (Left Kick Panel)
IP144Instrument Panel Wire and Cowl Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
ID42Cowl Side Panel LHIE42Cowl Side Panel LH
IG42Cowl Side Panel RH
IH42Right Kick Panel
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E540Engine Room Main WireI344Cowl Wire
I144Engine Room Main Wire

2001 PRIUS (EWD414U)
COMBINATION METER
MALFUNCTION
INDICATOR LAMP
ABS
SRS
TURN L
TURN R
HIGH BEAM OUTPUT CONTROLWAT ER TEMP.
(
HIGH) WAT ER TEMP.
(
LOW) CRUISE
A 17 A 18 A 19 B 5
A 16 A 10 B 4
L L L GR± R B±YL G±R
COMBINATION METERB C10 , C11A
FROM HEADLIGHTS (
*1)
FROM DAYTIME RUNNING
LIGHT RELAY (
*2) FROM TURN SI GNAL
FLASHER RELAY TO ENGINE
CONTROL MODULE
TO BRAKE ECU
TO AIRBAG SENSOR
ASSEMBLY
10A
ACC FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2D 2
GR± R
A B
B C
B B
JUNCTION
CONNECTOR J26
JUNCTION
CONNECTORB J27 , J28AGR ±R
GR± R* 1 : W/O DAYTIME RUNNING LIGHT
* 2 : W/ DAYTIME RUNNING LIGHT

2001 PRIUS (EWD414U)
I GROUND POINT
IGCT RELAY
A/C TRIPLE
PRESSURE SW
HYDRAULIC BOOSTER
WATER PUMP MOTOR
(
A/C)
FRONT PARKING
LIGHT LH
FRONT PARKING
LIGHT RHIG2 RELAY
ENGINE HOOD
COURTESY SW
FRONT WI PER MOTOR
FRONT TURN
SIGNAL LIGHT LH
RADIATOR FAN MOTOR
ABS SOL
RELAY
INVERTER
(
GND1)
(
GND2)
PTC HEATER
BLOWER MOTOR
LINEAR CONTROLLER
(
E1)
(
SG)
(
E01)
(
E02) FRONT SIDE MARKER
LIGHT LH
FRONT SIDE MARKER
LIGHT RH
FRONT TURN
SIGNAL LIGHT RH
BRAKE FLUID LEVEL
WARNING SW
WATER TEMP. SW
DRL RELAY
IGNITION COIL AND
IGNITER NO. 1
IGNITION COIL AND
IGNITER NO. 2
IGNITION COIL AND
IGNITER NO. 3
IGNITION COIL AND
IGNITER NO. 4
ENGINE CONTROL
MODULE1K3
E 5
E 5
E 5
E 5 E 5
E 5
E 5
E 5 (
±S)
E 5
E 5
3HYDRAULIC BOOSTER E 5 E 5 (
CUT±)
E 1
E 1
E 1
E 1
E 1
E 1
3W±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± 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 W±B W±B W±B W±B
W±B W±B W±B W±B W±B
A
AA
(
*1)IE ECW± B
W± B
W± B
W± B
W± B
W± B W±BA
AA
A
AJUNCTION
CONNECTOR J 7
J 1
JUNCTION
CONNECTOR
W±B
A
BRAKE ECU
EAE 3 E 3 E 3
EBID214
IO114 A A
B A JUNCTION
CONNECTORB J 8 , J 9A W±B
W±B
W±B
W±B
W±B
W±BBR
BR
W±B
W±BBR BR
W±B W±B W±B
BR
ENGINE CONTROL
MODULE
ENGINE CONTROL
MODULE
(
ME01)
(
E03)DATA LINK
CONNECTOR 3 HTR RELAY
NAVIGATION ECU
RADIO AND PLAYER
IFIJ121
BR
BR
BR BR
MULTI DISPLAY (
*2)(
*2)
AIRBAG SENSOR
ASSEMBLY
COMBINATION
METER(
E1)
(
ES)
IH W±B
2B6 7
LBR
2A WATER PUMP
MOTOR (
INVERTER)
2W±B
FAN NO. 2
RELAY
AEFI RELAY