TOYOTA PRIUS 2001 Service Repair Manual

2001 PRIUS (EWD414U)
2B 5
2G 12
C 1
A 19 A29 D2A27 B 7D3
A 28 A18 A11 D9
B 3A3A6A1B5
A 2B2A5
E 5A 4B4 B 1
E 5 E 5 B 1C9C10 B2C12 B3C4C11 C3C6C2C1
A 1A21 A7A8A9A4A3A5D6D1D8
A 31 6 A
IE SR MR1 MR2 GND1 GND2 MTT MT+ MT± PH PL R1+ R2+ IG2 SFRH SFLH SFLR SRRH SRRR SMC1 SMC2 SS AST SLA+ SLA±
R
R±B
Y±B
R±G
R±Y
R±L
G±W
G±B
G±O
B±O
L
LG W± L
Y±G
Y
GR
Y±R W±B
W±B
W±B
W±B W±B
W±BW±B
W±BW± B
W± BB±W
B±W
R
L±O
Y±B
B±L
LG±R
Y±G
G
G±W
W± B
W± BW± B A
AAA
A A BRAKE ACTUATORB B 1 , B 2A
BRAKE ECUB B10 , B11
A
HYDRAULIC BOOSTERB H 5 , H 6A
JUNCTION
CONNECTOR J 7 JUNCTION
CONNECTOR J 1B 3 C ,
C 5
A 2
SFRR
R±W
C , B12
D , B13
W±B W±B

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)
MEMO

2001 PRIUS (EWD414U)
REAR WINDOW DEFOGGER
40A
DEF FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
10A
GAUGE
32 51
2M 4
A 15
3 2
11
REAR WINDOW
DEFOGGER
NOISE FILTER
(
REAR WINDOW DEFOGGER) N 41
B
GR GR±B
MPX+
MPX±
MPXCOMBINATION
METER C11 MPX+BODY
ECUB 8 A DEF
RELAY
13
PSG
SW
RDEFREAR WINDOW
DEFOGGER SW
A/C AMPLIFIER A 7 DFG 2 1

2001 PRIUS (EWD414U)
DEF RELAY
5±3 : Closed with the ignition SW on and the rear window defogger SW on
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A736C1136
B8A36N439
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
2M31Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)
SERVICE HINTS

2001 PRIUS (EWD414U)
COMBINATION METER
VFD
A 22 A21 A20 A12 B2
A 14 A2A3A1B7B6B1A9A11 10A
GAUGE FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2A 515A
DOME
1J 7
2A 42G 2
IP1 4IP15 2J 62J82J9 7. 5A
ECU±B
2C 5B 9A 15 B 16
2B 62A 7
IH14
4 8
351516
13
GR±L
L L W±G LG±RW±LL L L L BR
GR GR±L
GR± BBR±RY±BY
L±WL±Y
L LR±G L±Y LLR±G R±G
MPX+ MPX± FU± FU+
MPX1 MPX2 BFUA
COMBINATION METERB C10 , C11A BODY ECUB B 8 , B 9A
FUEL SENDER F16
ENGINE CONTROL
MODULE E10
ODO/TRIP SW
[HAZARD WARNING SW] H 8FROM BACK±UP
LIGHT RELAY
FROM BRAKE ECU TO L IGHT
CONTROL RHEOSTAT
FROM EMPS ECUY
Y±B
BR±R L±Y
L±R
FUEL
SENDER
SENSOR 20 11 19
A F
A FJUNCTION
CONNECTORJ27 A
EODOTC