steering wheel TOYOTA PRIUS 2001 Service Repair Manual
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 2001, Model line: PRIUS, Model: TOYOTA PRIUS 2001Pages: 1943, PDF Size: 18.26 MB
Page 36 of 1943
2001 PRIUS (EWD414U)
G ELECTRICAL WIRING ROUTING
Position of Parts in Instrument Panel
A 7 A/C Amplifier
A 8 A/C Amplifier
A 9 A/C Amplifier
A 10 A/C Room Temp. Sensor
A 11 A/C Solar Sensor
A 12 A/C Thermistor
A 13 Accel Position Sensor
A 14 Air Inlet Control Servo Motor
A 15 Air Mix Control Servo Motor
A 16 Air Vent Mode Control Servo Motor
A 17 Airbag Sensor Assembly
A 18 Airbag Sensor Assembly
A 19 Airbag Sensor Assembly
A 20 Airbag Squib (Front Passenger Airbag Assembly)
A 21 Airbag Squib (Steering Wheel Pad)
A 22 Ashtray Illumination
B 5 Back±Up Light Relay
B 6 Blower Motor
B 7 Blower Motor Linear Controller
B 8 Body ECU
B 9 Body ECU
B 10 Brake ECU
B 11 Brake ECU
B 12 Brake ECU
B 13 Brake ECU
B 14 Brake Warning BuzzerC 7 Center Cluster SW
C 8 Cigarette Lighter
C 9 Cigarette Lighter Illumination
C 10 Combination Meter
C 11 Combination Meter
C 12 Combination SW
C 13 Combination SW
C 14 Combination SW
D 2 Data Link Connector 3
D 3 Daytime Running Light Relay
D 4 Diode (Door Courtesy)
D 5 Diode (Daytime Running Light)
E 3 EMPS ECU
E 4 EMPS ECU
E 5 EMPS ECU
E 6 EMPS ECU
E 7 Engine Control Module
E 8 Engine Control Module
E 9 Engine Control Module
E 10 Engine Control Module
Page 164 of 1943
2001 PRIUS (EWD414U)
EMPS
In this system, the controller determines the direction and the amount of the assistant force based on the signals from the
vehicle speed sensor and the torque sensor that is built in the gear box. The controller then assists the operation of the
steering wheel by controlling the DC motor installed in the steering gear box.
E5 (C), E6 (D) EMPS ECU
(D) 5±GROUND : Approx. 12 volts with the ignition SW at ON position
(C) 2±GROUND : Always continuity
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
B1136E5C36J18A37
C1036E6D36J19B37
D134J14A37J2237
D236J15B37J2637
E3A36J1637S135
E4B36J1737
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
324Engine Room R/B No.3 (Engine Compartment Right)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
2A30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)2B30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2G31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
2I31Cowl 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)
ID142Instrument Panel Wire and Cowl Wire (Left Kick Panel)
IM144Engine Room Main Wire and Cowl Wire (Right Kick Panel)
IO144Engine Wire and Cowl Wire (Right Kick Panel)
IP144Instrument Panel Wire and Cowl Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
IG42Cowl Side Panel RH
IH42Right Kick Panel
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
I744Engine Wire
SYSTEM OUTLINE
SERVICE HINTS
Page 165 of 1943
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.
Page 166 of 1943
2001 PRIUS (EWD414U)
SRS
C 1
D 11B 215A
AM2 1J 976AM2 AM1ACC
IG1
IG2
ST2
1 2 2 1 2 1 12
SPIRAL
CABLE B 14 B13 B10 B11 A6A5C2C1 10A
SRS ACC FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2E 4
2B 5
2E 2
B 5B6B23 A7A10 A12 A9C12 C9C7C104 3 2 1 4 3 2 1 3
SIDE AIRBAG
SQUIB RH S 7
SIDE AIRBAG
SQUIB LH S 6
AIRBAG SQUIB
(
FRONT PASSENGER
AIRBAG ASSEMBLY) A20
AIRBAG SQUIB
(
STEERING
WHEEL PAD) A21 IGNITION SW I15
SIDE AIRBAG SENSOR RH S 5
SIDE AIRBAG SENSOR LH S 4
HYBRID VEHICLE
CONTROL ECU H13
FUSIBLE
LINK
BLOCK
NO. 1D F1 2 , F13CAIRBAG SENSOR ASSEMBLYB A17 , A18AC, A19 ABFS
B±G B W±R W±R
B±W B±O
GR
L
P±L
L±W
LG±B
GR ±L
P
L±Y
LG
GR Y±B
Y
Y±R
Y±G
Y±R
Y±G
Y±G
Y±R
BATTERYD+ D± P+ P± SFL+ SFR±SFL± SFR+ IG2 ACC GSW2 VUPL SSL+ SSL± ESL VUPR SSR+ SSR± ESR
GR
2C 2
2G 1
120A MAIN
1
FUSIBLE
LINK BLOCK
NO. 2 F18
1 212 A 2A1C5C6
P15
PRETENSIONER
RH PRETENSIONER
LH P14
Y±B
Y
Y±B
Y
PL+ PL± PR+ PR±
P±L
(
*1)
(
*1)
(
*1)
(
*1)
(
*1)
(
*1)
(
*1)
(
*1) (
*1) (
*1) (
*1) (
*1)
Page 168 of 1943
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
Page 216 of 1943
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
Page 258 of 1943
2001 PRIUS (EWD414U)
M OVERALL ELECTRICAL WIRING DIAGRAM
1
234
21 PRIUS
2ACC
IG1
ST1
IG2
ST2 AM1
7AM2
1
120A MAIN
1B 1C
1D2H 1
5A AM1
2B 3
ID Co wl s id e
panel LH2K 8
1B 215A
AM2 1J 92C 2
2G 1
A
W±B W± B W± GW
W±R B
WB±G
W±R W± G
I15
IGNITION SW
100 A DC/ DCBATTERYF18
FUSI BLE L I NK
BLOCK NO. 2F11 F12,
FUSIBLE LINK
BL OCK NO. 1BCF13, DSI L TC 5B 12B 19B 6B12C9C7C10C
12
SPI RAL
CA BLE
21
2 1 14 B 13 B 10 B 11 B 9 B 20 B
21 15 B 26 B
B± W
IG2
Y±R
Y
Y± B
A17 A1 8,
AI RBAG SENSOR ASSEMBLYAB
Y± G B± W BR±WW±RBR
F 2
FRONT AIRBAG
S ENSOR RH A21
AI RBAG SQUI B
(
Steering Wheel
Pad)A20
AI RBAG SQUI B
(
Front Passenger
Airbag As sembly)
F 1
FRONT AI RBAG
SENSOR LH±SL +SL ±SR +SR P± P+ D± D+
GR
LG
L±Y
PESR SSR± SSR+ VUPR ACC
3IL1 4IL1 1IL1 2IL1
BR±WW±RBR
GR W P±B
A19 , C
B±O
To Data Link Connector 3
<2±5><2±6>
2 1 6A 5AY±R Y± GS 6
SIDE AIRBAG
SQUIB LHSFL± SFL+
C 2C 1
21
Y± GY±RS 7
S I DE AI RBA G
SQUIB RHSFR+ SFR± 2E 3
C 5C 6
21
Y± BYP15
PRETENSIONER
RHPR± PR+
W± BPL+ PL±
P14
PRETENSIONER
LH
Y
Y± BA
1 21 2A4 3 2 1 123
7A 10A 12A 9A4
GR± L
LG±B
L±W
P±LESL SSL± SSL+ VUPR 3B
LA
B±Y2E 12A 9 2B 4
B±YL
W P± B
2B 5
2E 2B± W
10A ACC
2D 2
2 1
3 5 2C 8
10 A SRS ACC
2E 4
GR± R
P±L
6
B± W
3
P±L
ACC RELAY
S 4
SI DE AI RBAG SENSOR L HS 5
S I DE A I RBA G SE NSOR RH
SRS Power Source
C
B C
A5
B14
A
16 A
LBE+8To Buckle SW LH
< 9±3>
RBE+23 B
LGSW2To Hy brid Vehicle
Con t r ol ECU< 1 ±20 >
11
From Buckle SW RH
<9±3>
G±O
AC
G±O
GR± R BB
GR ±R
J26
JUNCTI ON
CONNECTOR
C10 C1 1,
SRS WARNI NG LI GHT
[COMB. METER]AB J27 J28,
JUNCTION
CONNECTORAB* 1 : w/ Side Air bags
(
*1) (
*1) (
*1) (
*1) (
*1) (
*1) (
*1) (
*1)
(
*1) (
*1) (
*1) (
*1)
28 B
E2
J11
JUNCTI ON
CONNECTOR
Right kick
panel
W±BIHB 27E1W±B
2A 7
2B 6 LLBR
Page 267 of 1943
MODEL CODE AND MODEL LINE-UP
3
MODEL CODE
NHW11 L ± A E E E B A
12345678
1BASIC MODEL CODE1NHW11: With 1NZ-FXE Engine
2STEERING WHEEL POSITION2L: Left-Hand Drive
3MODEL NAME3A: Prius
4BODY TYPE4E: 4-Door Sedan
5GEAR SHIFT TYPE5E: Automatic, Column
6GRADE6E: Standard
7ENGINE SPECIFICATION7B: Atkinson
DESTINATION
8A: U.S.A.
K: Canada
MODEL LINE-UP
TRANSAXLE
DESTINATIONENGINEBODY
TYPEGRADEAutomaticTYPE
P111
U.S.A.
1NZ FXESedanStandard
NHW11L-AEEEBA
Canada1NZ-FXESedanStandardNHW11L-AEEEBK
Page 385 of 1943
CHASSIS ± STEERING
182CH68
Rear Wheel
Speed SensorsBrake ECU
Torque Sensor Signal 1
Torque Sensor Signal 2
EMPS
ECUMeter ECU
Gateway ECUDLC3
Display ECU
Multi-information
Display
123
EMPS (Electric Motor-assisted Power Steering)
1. General
In accordance with sensor information such as that provided by the rear wheel speed sensors, the torque sen-
sor that is mounted on the steering gear, and the EMPS ECU determines the direction and the force of the
power assist and actuates the DC motor that is mounted on the steering gear to provide power assist to the
steering effort.
The EMPS in the Prius the following features:
This system can provide power assist even when the engine is stopped.
This system offers excellent fuel economy characteristics because power assist is provided by the DC mo-
tor that is mounted on the steering gear, and this motor consumes energy only when power assist is re-
quired.
Unlike the conventional hydraulic power steering system, this system excels in serviceability because it
does not require pipes or the power steering fluid.
System Diagram
Page 386 of 1943
CHASSIS ± STEERING
182CH69
Meter ECU
EMPS ECU
Relay
DC MotorRear Wheel Speed
Sensors and Rotors
Brake ECU Multi-information Display 124
2. Layout of Main Components
3. Function of Main Components
ComponentsFunction
St i
Torque Sensor
Detects the twist of the torsion bar, converts the torque that is applied
to the torsion bar into an electrical signal, and outputs this signal to
the ECU.
Steering
Gear
DC MotorGenerates power assist in accordance with a signal received from the
EMPS ECU.
Reduction
MechanismReduces the rotation of the DC motor and transmits it to the pinion
shaft.
EMPS ECU
Actuates the DC motor mounted on the steering gear for providing
power assist, based on the signals received from various sensors and
the rear wheel speed signal.
Meter ECUOutputs a signal for displaying the PS warning on the center display
in case of a malfunction in the system.
Brake ECURear wheel speed signals are outputted to EMPS ECU.
RelaySupplies power to the DC motor for power assist.
Multi-information DisplayDisplays the PS warning in case of a malfunction in the system.