key battery TOYOTA PRIUS 2001 Service Repair Manual

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)
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)
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

2001 PRIUS (EWD414U)
HYBRID VEHICLE IMMOBILISER SYSTEM
7. 5A
ECU±B FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2C 5
A A AA F
B H
5JUNCTION
CONNECTOR J20
JUNCTION
CONNECTOR J11 1
12
R±G R±G R±G LG±B
W±B W± B W±B
+B HEVC
IND
JUNCTION
CONNECTORB J27 A , J28
ID2 10 ID2 11 76
15A
AM2
1B 21J 92C 2
2G 1
D 1C 1
120A MAIN
1AM2 IG2
ST2
IFC 8
B 7B E
A A
JUNCTION
CONNECTORB J27 A , J28
JUNCTION
CONNECTORB J27 A , J28
B F
A D
JUNCTION
CONNECTORB J12 A , J13
B D
A B
JUNCTION
CONNECTORB J27 A , J28
A A
B A
JUNCTION
CONNECTORB J24 A , J25
ID A A
2D 8
1 2ID1 9B B
IB1 3
1 ID2 8
JUNCTION
CONNECTOR J10
JUNCTION
CONNECTOR J20
46711 7
238
6DATA LINK
CONNECTOR 3 D 2
HYBRID VEHICLE
CONTROL ECU H14
CENTER
CLUSTER SW C 7
DOOR COURTESY
SW FRONT LH D 6
UNLOCK WARNING SW U 1RADIO AND PLAYERC R 3 B , R 4FUSIBLE LINK
BLOCK NO. 1D F1 2 C , F13 BATTERYB±G B W±R W±R
B±W B±W B±W
B±R
B±WB±R R±W
L±B
W±BL±B L±B L±B
W±BR±W R±WLG±B BR BR
LG±B
2K 8
A IG D
KSW CTY
LG±B
FUSIBLE LINK
BLOCK NO. 2 F18
W±B
W± B ID1 8
R±G
IGNITION SW I15
OP1 FC VC
GND
TRANSPONDER KEY
COMPUTER T 4 A C
A CJUNCTION
CONNECTORJ24 A

2001 PRIUS (EWD414U)
KEY REMINDER AND LIGHT REMINDER BUZZER
120A MAIN
1B 1C1
D 11B 1130A
HEAD
1 2
32 41
1F 823 15
7. 5A
TAI L10A
GAUGE FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2K 62H 1
B 2B11ID2 2 IA2 6
ID2 3
B 17 B18
IG ID2 5ID262K 1
B F
A D
IB1 3
1 16 7
E6
E
13 14
A17 15
T HR±W R±WW
B W B±G
LG LGR±G R±G R±G R±G R±W R
LG±R R
LG±R W±B
R±W R±W R±W
2
(
*1) (
*1) (
*1)
R±W
(
*2)
(
*2)
(
*2) (
*1)H
HRLY TRLYH±LP
TAI L REL AY HEAD RELAYSHORT PIN
JUNCTION
CONNECTOR J20DAYTIME RUNNING
LIGHT RELAY D 3
OFF
TAIL
HEAD
100A DC/DC
FUSIBLE LINK
BLOCK NO. 2 F1 8
FUSIBLE LINK
BLOCK NO. 1C F11 B , F1 2
JUNCTION
CONNECTORB J12 A , J13
DOOR COURTESY
SW FRONT LH D 6
JUNCTION
CONNECTOR J17LIGHT CONTROL SW
[COMB. SW] C13
D , F13
BATTERY3 (
*1)
(
*2)
(
*2)
(
*1)
BODY ECUB B 8 , B 9AL 7. 5A
ECU±B
2C 5 2A 5
R±G
B 9F F
R±G
JUNCTION
CONNECTOR J2 7
DCTYTAIL IG B

2001 PRIUS (EWD414U)
I GROUND POINT
REAR COMBINATION
LIGHT LH
LICENSE PLATE
LIGHT LH
HIGH MOUNTED
STOP LIGHT
REAR COMBINATION
LIGHT RH
LICENSE PLATE
LIGHT RH
SYSTEM MAIN RELAY
LUGGAGE COMPARTMENT
DOOR UNLOCK SWBATTERY MOTOR
BLOWER CONTROLLER
PERSONAL LIGHT
POWER WINDOW
CONTROL SW REAR LH
DOOR LOCK MOTOR
AND DOOR UNLOCK
DETECTION SW
REAR LH
BATTERY FAN RELAY
BATTERY ECUB C
B C
B CA B
A B
A B
BA11
B B
B BA C
B B
BJBK BI W± B
W± B
W± B
W± B
W± B
W± B
W± B
W± B W± BW±BW± B W±B W±B
W±B
W±B
W±B
W±B
JUNCTION
CONNECTORB J32 , J33A
JUNCTION
CONNECTORB J32 , J33
AB 1 W±B
W± B
HYBRID VEHICLE
CONTROL ECUCOMBINATION
SW COMBINATION SW
COMBINATION SW
TURN SIGNAL
FLASHER RELAYDOOR LOCK CONTROL
SW FRONT RH DOOR LOCK MOTOR,
DOOR KEY LOCK AND
UNLOCK SW AND DOOR
UNLOCK DETECTION
SW FRONT RH
B(
ECC)
(
GND1)
(
GND2)
A A
W± B A
W± B
B A B W±B W±B W±B W±B
W± BW± B
W± B 7
IQ1
2
IQ1
A AA
W± B A
B
A
B A
A A
A (
E)
(
E)
BLW±B
W±B
BC1 8A A
W±B
JUNCTION
CONNECTORB J18 , J19A W±B

L PART NUMBER OF CONNECTORS
Code Part Name Part NumberCodePart Name Part Number
Note : Not all of the above part numbers of the connector are established for the supply.
2001 PRIUS (EWD414U) A 1
A/C Condenser Fan Motor90980±11237
A 2A/C Magnetic Clutch and Lock Sensor90980±10942
A 3A/C Triple Pressure SW (A/C Dual and
Single Pressure SW)90980±10943
A 4ABS Speed Sensor Front LH90980±11003A 5ABS Speed Sensor Front RH90980±11003
A 6Ambient Temp. Sensor90980±11070
A 7A/C Amplifier90980±11911
A 8A/C Amplifier90980±11913
A 9A/C Amplifier90980±11927
A10A/C Room Temp. Sensor
A11A/C Solar Sensor90980±11919
A12A/C Thermistor
A13Accel Position Sensor90980±11144
A14Air Inlet Control Servo Motor90980±11921
A15Air Mix Control Servo Motor90980±11909A16Air Vent Mode Control Servo Motor90980±11909
A17Airbag Sensor Assembly90980±11869
A18Airbag Sensor Assembly90980±11872
A19Airbag Sensor Assembly90980±11867
A20Airbag Squib (Front Passenger Airbag
Assembly)90980±11884
A21Airbag Squib (Steering Wheel Pad)90980±10850
A22Ashtray Illumination90980±12111
A23ABS Speed Sensor Rear LH90980±11060A24ABS Speed Sensor Rear RH90980±11060
B 1Brake Actuator90980±11087
B 2Brake Actuator90980±11161
B 3Brake Actuator90980±11698
B 4Brake Fluid Level Warning SW90980±11207
B 5Back±Up Light Relay82660±20340
B 6Blower Motor90980±10214
B 7Blower Motor Linear Controller90980±11676
B 8Body ECU90980±11971
B 9Body ECU90980±11973
B10Brake ECU90980±11935
B11Brake ECU90980±11476
B12Brake ECU90980±11637
B13Brake ECU90980±11638
B14Brake Warning Buzzer90980±10906
B15Battery Blower Motor82824±47130
B16Battery Blower Motor Controller90980±11676
B17Battery ECU90980±11392
B18Battery ECU90980±11424
B19Battery Fan Relay82660±20340
B20Buckle SW and Tension Reducer LH
B21Buckle SW RH and Seat Belt Warning
Occupant Detection Sensor90980±11471
C 1Camshaft Position Sensor90980±10947
C 2Camshaft Timing Oil Control Valve90980±11162
C 3Circuit Breaker Sensor90980±11898
C 4Converter90980±10942
C 5Converter90980±11963
C 6Crankshaft Position Sensor90980±12028
C 7Center Cluster SW90980±10801
C 8Cigarette Lighter90980±10760
C 9Cigarette Lighter Illumination90980±11148
C10Combination Meter90980±11927
C11Combination Meter90980±11923
C12Combination SW90980±11594
C13Combination SW90980±11672
C14Combination SW90980±11616
D 1DC Motor90980±10838
D 2Data Link Connector 390980±11665
D 3Daytime Running Light Relay90980±12034
D 4Diode (Door Courtesy)90980±11251
D 5Diode (Daytime Running Light)90980±10962
D 6Door Courtesy SW Front LH
D 7Door Courtesy SW Front RH90980±10871D 8Door Courtesy SW Rear LH90980±10871
D 9Door Courtesy SW Rear RH
D10Door Lock Control SW Front RH90980±10797
D11Door Lock Motor and Door Unlock
Detection SW Rear LH
90980±11150
D12Door Lock Motor and Door Unlock
Detection SW Rear RH90980±11 150
D13Door Lock Motor, Door Key Lock and
Unlock SW and Door Unlock Detection SW
Front LH
90980±11858
D14Door Lock Motor, Door Key Lock and
Unlock SW and Door Unlock Detection SW
Front RH90980±11 858
E 1Engine Coolant Temp. Sensor90980±10737
E 2Engine Hood Courtesy SW90980±11189
E 3EMPS ECU90980±12012
E 4EMPS ECU90980±11579
E 5EMPS ECU90980±12120
E 6EMPS ECU90980±11923
E 7Engine Control Module90980±11421
E 8Engine Control Module90980±11476
E 9Engine Control Module90980±11637

2001 PRIUS (EWD414U)
M
19 20
18 17
(
Cont. next page)
1 PRIUS (
Cont' d)
A
BG± Y
L±R
14 B 15 BA
B
13B2B1E
4B 10B 3B 22 A
BJRight s ide of
rear pillar CA
BB 1C 1B E D
CA
BB 9D 10D 21D
10 ID1
To Data Link Connector 3
<2±5><2±6>8IH1 9IH111 IF12E
6A8A 3IF1 20 E
7A19 E
18 A18 E
19 A10 IB126 D
17 A6IB1 25 D
16 AF 20 D 3 E 7 D30 D 18 D 17 D
Fr om Br ake ECU
< 19±9>
From Air bag Sens or
Assembly< 21±3> From Transponder
Key Computer< 2±16>
TOYOTA Hybrid System
H1 0 H11, CAB E, H13 , H12 D, H14
HYB RI D VE HI CL E CONTROL E CU
PP P±B W± LV GRP BR± BG± R
V GRP
W±B W±B W±B Y Y± B Y±RW
WB R G R± WB± L
WB R G (
*1) R±WB±L
(
*1)
WB R G R± WB±L LGV G
RL B± WWFS E TC S I L CON1 CON2 CON3 A S1G A S1 HTD+ HTD± DTH+ DTH± GB I B HTB+ HTB± BTH+ B TH± AB FS FCV C
To Data Link Connec tor 3
<2±6>W± B W± B
W± B
W± B O(
*2)
O(
*2)1
2
W
S 8 S 9,
SYSTEM MAI N REL AYAB
J32 J33,
JUNCTION
CONNECTORAB
B17 B18,
BATTERY ECUAB
C 3
CI RCUI T B REA KER
SENSOR
G±Y
L±R * 2 : High Voltage(
273. 6V)
W± B 3A 4A 5A
7A 2A 6A 1AC , S10 9E
YHA O
10 E
Y± RHAI
5IF2 1IF2 2IF2 4IF2 3IF2* 1 : Shielded
To Combinat ion Meter
< 23±2>8BSPDI
19 IE1V±W V±W
F
2A
W± R
W± R CC W± G W±G
1D 1E
O(
*2)
O(
*2) , S11 D , S12 E
E D O(
*2)
O(
*2)

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