2001 TOYOTA PRIUS belt

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)
SEAT BELT WARNING
10A
GAUGE FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2A 5
A 22 B 3 B 2 B 5 A 16 A15
A 14 B 3
IJ1 9
1 3
IJ1 10
A AB A
ID 2D 8
2K 8IJ1 11
B D
A E
A A4
11 13
1 A
2 A 14
4 11
W±B W±B
W±B W±B
W± B
W± B W±BW±B P±L P±L
G±OG±O GR ±BGR
G±O
GR±B
GR
LGR ±B
L
L GR±L
GR±L
MPD1
MPX+ MPX2
PKBL MPX± MPX+ DBKL MPX1MPD2
MP2+
A/C AMPLIFIER A 7
GATEWAY ECU G 1 ENGINE CONTROL MODULE E10
BODY ECUB B 8 , B 9A
COMBINATION METERB C10 , C11A
JUNCTION CONNECTOR J29
15
A
JUNCTION CONNECTORB J2 4 A , J25
JUNCTION CONNECTORB J2 2 A , J23BUCKLE SW RH AND
SEAT BELT WARNING
OCCUPANT DETECTION SENSOR B21
IJ1 8
G±O JUNCTION
CONNECTOR J11
15A
DOME
1J 7
L±Y
2A 42G 2
A 21
L SEAT BELT
(
FRONT
PASSENGER' S SEAT) BUCKLE SW LH B20
SEAT BELT
(
DRIVER' S SEAT)IG
IH 2A 7
2B 6
BR

2001 PRIUS (EWD414U)
When the driver has not fastened the seat belt while the ignition SW is ON, the driver seat belt warning light blinks, and a
warning buzzer comes on.
Also, in the front passenger seat, a sensor recognizes a passenger, and when the passenger has not fastened the seat belt,
the front passenger seat belt warning light blinks.
B20 BUCKLE SW LH
1±2 : Closed with driver's seat belt in use
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A736C10A36J22A37
B8A36C11B36J23B37
B9B36E1036J24A37
B2038G137J25B37
B2138J1137J2937
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1J27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2A
2B30Instrument 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)
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)
IJ144Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)
: GROUND POINTS
CodeSee PageGround Points Location
ID42Cowl Side Panel LH
IH42Right Kick Panel
SYSTEM OUTLINE
SERVICE HINTS

2001 PRIUS (EWD414U)
T6 TENSION REDUCER SOLENOID
1±GROUND : Approx. 12 volts with the ignition SW at ON position
B20 TENSION REDUCER LH
1±2 : Closed with driver's seat belt in use
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
B2038J22A37J2437
J1137J23B37T639
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
2C30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)2D30Instrument Panel 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)
IJ144Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)
: GROUND POINTS
CodeSee PageGround Points Location
ID42Cowl Side Panel LH
SERVICE HINTS

2001 PRIUS (EWD414U)
SRS
NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionary
instructions and the procedure and precautions in the Repair Manual for the applicable model year.

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information
when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.

Work must be started after 90 seconds from when the ignition switch is turned to the ºLOCKº position and the
negative (±) terminal cable is disconnected from the battery.
(The SRS is equipped with a back±up power source so that if work is started within 90 seconds from
disconnecting the negative (±) terminal cable of the battery, the SRS may be deployed.)

When the negative (±) terminal cable is disconnected from the battery, the memory of the clock and audio system will be
canceled. So before starting work, make a record of the contents memorized in the audio memory system. When work is
finished, reset the audio systems as they were before and adjust the clock. To avoid erasing the memory in each
memory system, never use a back±up power supply from outside the vehicle.

Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.

Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner,
airbag sensor assembly or side airbag sensor directly to hot air or flames.

Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbag
assembly, side airbag assembly, seat belt pretensioner, airbag sensor assembly and side airbag sensor assembly
should be inspected.

Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.

Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt
pretensioner, airbag sensor assembly or side airbag sensor assembly in order to reuse it.

If the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner, airbag sensor
assembly or side airbag sensor assembly has been dropped, or if there are cracks, dents or other defects in the case,
bracket or connector, replace them with new ones.

Use a volt/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting the system's electrical circuits.

Information labels are attached to the periphery of the SRS components. Follow the instructions on the notices.

After work on the SRS is completed, perform the SRS warning light check.

If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.

2001 PRIUS (EWD414U)
B 20 B 9 B 26 B 1510A
ACC FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2D 2
2A 9 2B 4
2E 1
B 3
21216 13 7
FRONT AIRBAG SENSOR
RH F 2
FRONT AIRBAG SENSOR
LH F 1DATA LINK
CONNECTOR 3 D 2
AIRBAG SENSOR ASSEMBLYB A17 , A18AC, A19 AB TC SIL
W±R
BR
B±W
BR±W W±R
BR
B±Y L
GR±R
LA
+SL ±SL +SR ±SRB 12
SIL E E
B 19
JUNCTION
CONNECTOR J26 P±B
WP±B
W
B±Y
TC
IL1 3IL14
B±W
BR±W
B D
A EA 11
2K 8
ID A
BUCKLE SW
LH B20G±O W± B
W±B
LBE+
A A
JUNCTION
CONNECTOR J29
JUNCTION CONNECTORB J22 A , J23
JUNCTION
CONNE CTOR J11
G±O
IJ1 11
W±B
IL1 2 IL1 1A C
B C
GR± R
B A 14 A 16
B5
B
GR± R L
JUNCTION
CONNECTORB J27 A , J28
SRS WARNING LIGHT
[COMB. METER]B C10 , C11A
JUNCTION
CONNECTOR J26
2D 8
L
A A
B C
JUNCTION
CONNECTORB J22 A , J23
1 2
2E 3B 28
W±B
E2
C 8RBE+
G±O
* 1 : W/ SIDE AIRBAGS
IJ1 9
B AA AAA
IJ1 10B 27E1
W±B
IH
W± B
2A 7
2B 6
1 3
3 2
BRP±L P±L W± B W±B
W± B W±B
W±B
W± B
JUNCTION
CONNECTORB J24 A , J25
BUCKLE SW RH AND
SEAT BELT WARNING
OCCUPANT DETECTION SENSOR B21
BODY ECU B 9

2001 PRIUS (EWD414U)
SRS
The SRS is a driver and front passenger protection device which has a supplemental role to the seat belts.
When the ignition SW is turned to ACC or ON, current from the SRS ACC fuse flows to TERMINAL (B) 6 of the airbag sensor
assembly. Only when the ignition SW is on does the current flow TERMINAL (B) 5 of the airbag sensor assembly.
If an accident occurs while driving, when the frontal impact exceeds a set level, current flows to TERMINALS (B) 14, (B) 10,
(A) 2 and (C) 5 of the airbag sensor assembly to TERMINAL 1 of the airbag squibs and the pretensioners to TERMINAL 2 to
TERMINALS (B) 13, (B) 11, (A) 1 and (C) 6 of the airbag sensor assembly to TERMINAL (B) 27, (B) 28 or BODY GROUND
to GROUND, so that current flows to the front airbag squibs and the pretensioners and causes them to operate.
When the side impact also exceeds a set level, current from the ignition SW (IG2) or SRS ACC fuse flows to TERMINALS
(A) 5, (C) 2, (A) 2 and (C) 5 of the airbag sensor assembly to TERMINAL 1 of the side airbag squibs and the pretensioners to
TERMINAL 2 to TERMINALS (A) 6, (C) 1, (A) 1 and (C) 6 of the airbag sensor assembly to TERMINAL (B) 27, (B) 28 or
BODY GROUND to GROUND, causing side airbag squibs and the pretensioners to operate.
The airbag stored inside the steering wheel pad is instantaneously expanded to soften the shock to the driver.
The airbag stored inside the passenger's instrument panel is instantaneously expanded to soften the shock to the front
passenger.
Side airbags are instantaneously expanded to soften the shock of side to the driver and front passenger (w/ side airbags).
The pretensioners make sure of the seat belt restrainability.
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A17A36F134J25B37
A18B36F234J2637
A19C36F12C34J27A37
A2036F13D34J28B37
A2136F1838J2937
B936H1337P1439
B2038I1537P1539
B2138J1137S439
C10A36J22A37S539
C11B36J23B37S639
D236J24A37S739
: 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)
2A
2B
2C30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2D
()
2E
2G31Engine Room Main 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)
IJ144Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)
IL144Instrument Panel Wire and Engine Room Main Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
ID42Cowl Side Panel LH
IH42Right Kick Panel
SYSTEM OUTLINE