engine TOYOTA PRIUS 2001 Service User Guide

2001 PRIUS (EWD414U)
G
Position of Parts in Engine Compartment
I 1 Ignition Coil and Igniter No.1
I 2 Ignition Coil and Igniter No.2
I 3 Ignition Coil and Igniter No.3
I 4 Ignition Coil and Igniter No.4
I 5 Injector No.1
I 6 Injector No.2
I 7 Injector No.3
I 8 Injector No.4
I 9 Inverter
I 10 Inverter
I 11 Inverter
I 12 Inverter
I 13 Inverter
I 14 Inverter
K 1 Knock Sensor
M 1 Mass Air Flow Meter
M 2 Motor Generator No.1
M 3 Motor Generator No.2
M 4 Motor Generator No.2N 1 Noise Filter (Ignition)
O 1 Oil Pressure SW
R 1 Radiator Fan Motor
S 1 Steering Shaft Torque Sensor
T 1 Theft Deterrent Horn
T 2 Throttle Control Motor
T 3 Throttle Position Sensor
V 1 Vacuum Sensor (HC Adsorber and Catalyst System)
V 2 VSV (EVAP)
V 3 VSV (HC Adsorber and Catalyst System)
W 1 Washer Motor
W 2 Water Pump Motor (A/C)
W 3 Water Pump Motor (Inverter)
W 4 Water Temp. SW

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

2001 PRIUS (EWD414U)
G
Connector Joining Wire Harness and Wire Harness
1
1
EA1DARK GRAY
CodeJoining Wire Harness and Wire Harness (Connector Location)
EA1Engine Wire and Engine No.4 Wire (Near the Radiator Fan)

2001 PRIUS (EWD414U)
G
Connector Joining Wire Harness and Wire Harness
CodeJoining Wire Harness and Wire Harness (Connector Location)
IA1Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)IA2Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)
IB1Floor Wire and Cowl Wire (Cowl Side Panel LH)
IC1Front Door LH Wire and Cowl Wire (Left Kick Panel)
ID1Instrument Panel Wire and Cowl Wire (Left Kick Panel)ID2Instrument Panel Wire and Cowl Wire (Left Kick Panel)
IE1Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)
IF1Instrument Panel Wire and Floor Wire (Left Kick Panel)IF2Instrument Panel Wire and Floor Wire (Left Kick Panel)
IG1Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
IH1Floor Wire and Engine Room Main Wire (Left Kick Panel)

2001 PRIUS (EWD414U)
G
Connector Joining Wire Harness and Wire Harness
CodeJoining Wire Harness and Wire Harness (Connector Location)
II1Instrument Panel Wire and A/C Sub Wire (Instrument Panel Brace LH)
IJ1Floor No 3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)IJ2Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)
IK1Engine Wire and Engine Room Main Wire (Right Kick Panel)
IL1Instrument Panel Wire and Engine Room Main Wire (Right Kick Panel)
IM1Engine Room Main Wire and Cowl Wire (Right Kick Panel)
IN1Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
IO1Engine Wire and Cowl Wire (Right Kick Panel)
IP1Instrument Panel Wire and Cowl Wire (Right Kick Panel)
IQ1Front Door RH Wire and Cowl Wire (Right Kick Panel)

2001 PRIUS (EWD414U)
POWER SOURCE
HEAD RELAY
2±1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position
Closed with the engine running and the parking brake pedal released (Parking brake SW off) [w/ Daytime running light]
TAIL RELAY
5±3 : Closed with the light control SW at TAIL or HEAD position
I15 IGNITION SW
2±3 : Closed with the ignition key at ACC or ON position
2±4 : Closed with the ignition key at ON or ST position
7±6 : Closed with the ignition key at ON or ST position
7±8 : Closed with the ignition key at ST position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
F10A34F13D34I1537
F11B34F17A38
F12C34F18B38
: 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)
1B27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)1J27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2B
2C30Instrument 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)2H31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
SERVICE HINTS

2001 PRIUS (EWD414U)
B 3B6B1B4C3C1C 2 C 9 C 18 C 19 C 21 C 14
I 8I 8
P
L
B
W
R±W
GR GRR±WWBL P (
*1)
(
*1)
(
*1)
HYBRID VEHICLE CONTROL ECUA H10 , H11CB, H12 E, H13 D, H14
W± B
W± BMMT MMTG MRFG MRF MCSG MCS
(
*1)
W± B
W±B
D 6 D 8 D 29 D 19 D 27 D 28
IG A
JUNCTION
CONNECTOR J17JUNCTION
CONNECTOR J1 8
B BB
L
Y
BR
R±Y
OP
O R±YBRYL P(
*1)
(
*1) (
*1)
(
*1) W± B W± B
SPDO ESTP HTE± HTE+ ETH± ETH+
C 10
SPHV C 16
ESTP C 18
HTE± C 19
HTE+ C 27
ETH± C 28
ETH+
D 13MPX2
D 14MPX1 ENGINE CONTROL MODULED E 9 , E10C
GR GR± L
16
15
GR±B
MPX±
MPX+
BODY ECU B 8
GR±B
GR
W± B W± BW± B
W± B MCS MCSG MRF MRFG MMTG MMT
MOTOR GENERATOR
NO. 2C M 3 , M 4
BB 10
GO
G G
GO
21 CIA2 9
11
4 MPD2
MPD1
4
11MP2+
MPX+
GR±B
G 1
GATEWAY ECU A 7
A/C AMPLIFIER GR
* 1 : SH IELD ED

2001 PRIUS (EWD414U)
TOYOTA HYBRID SYSTEM
FEATURES OF TOYOTA HYBRID SYSTEM
This system controls the following modes in order to achieve the most efficient operations to match the driving conditions.
(1) Supply of electrical power from the HV battery to motor generator no.2 provides force to drive the wheels.
(2) While the tires are driven by the engine via the planetary gears, motor generator no.1 is driven via the planetary gears to
supply electricity to motor generator no.2 to drive the wheels.
(3) When the vehicle is decelerating, kinetic energy from the wheels is recovered and converted into electrical energy and
used to recharge the HV battery by means of motor generator no.2.
The hybrid vehicle control ECU switches between these modes (1, 2, 1+2, or 3) according to the driving conditions.
However, when the state of charge of the HV battery is low, the HV battery is charged by the engine by turning motor
generator no.1.
CRUISE CONTROL OPERATION
Cruise control is the speed control device, which sets the desired speed by just operating the switch on the control panel
without pressing the accelerator pedal. This device is used when you would like to drive the vehicle at the fixed speed.
1. SET CONTROL
If you operate the SET/COAST switch when driving (The available range of set speed: between about 40 and 200 km/h) with
the main switch is ON (When power indicator comes on), the device memorizes vehicle's speed when switch is off and
controls the fixed speed.
2. SET SPEED CONTROL
This device compares the vehicle's running speed and the memorized speed, and controls the driving power of the motor
and the engine by calculating the cruise control requirements so that both speed become equivalent.
3. COAST CONTROL
If the SET/COAST switch is continued to be ON during the running with the cruise control, the device recognizes the cruise
control requirement is at 0 and decelerates the vehicle's speed. Then the device memorizes the speed when the switch is off
in order to control the fixed speed.
In each time you operate SET/COAST switch momentarily (For about 0.5 second), the memorized speed is decreased in
about 1.5 km/h. However, in case of the tap±down operation with more than 5±km/h gap between the memorized speed and
vehicle's running speed, the device memorizes the vehicle's speed when the switch is off and controls the fixed speed.
4. ACCEL CONTROL
If the RESUME/ACCEL switch is continued to be ON during the running with the cruise control, the device recognizes the
cruise control is on the acceleration side and accelerates the vehicle's speed. Then the running speed when the switch is off
is memorized to control the fixed speed.
In each time you operate RESUME/ACCEL switch momentarily (For about 0.5 second), the memorized speed is increased
in about 1.5 km/h. However, if there is more than 5±km/h gap between the memorized speed and vehicle's running speed,
this operation does not change the memorized speed. (Tap±up operation is not available.)
5. RESUME CONTROL
If the running speed is faster than the low speed limit after the cruise control is canceled manually, the fixed speed is
controlled by the OFF±ON operation of RESUME/ACCEL switch, so that the vehicle's speed returns to the memorized
speed at the time the cruise control is released.
SYSTEM OUTLINE

2001 PRIUS (EWD414U)
TOYOTA HYBRID SYSTEM
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
223Engine Room R/B No.2 (Right Side of Reserve Tank)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A27Engine Wire and Engine Room J/B (Engine Compartment Left)
1B
1F27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)1J27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
1K
2A
2B30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)2C30Instrument 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)
IA142Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)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)
IE142Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)
IF142Instrument Panel Wire and Floor Wire (Left Kick Panel)IF242Instrument Panel Wire and Floor Wire (Left Kick Panel)
IH142Floor Wire and Engine Room Main Wire (Left Kick Panel)
IK144Engine Wire and Engine Room Main Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
EC40Engine Compartment Left
ID42Cowl Side Panel LHIE42Cowl Side Panel LH
IG42Cowl Side Panel RH
IH42Right Kick Panel
BI46Left Side of Rear Pillar
BJ46Right Side of Rear Pillar
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E540Engine Room Main WireI844Engine Wire
I244Instrument Panel WireI944Engine Room Main Wire
I444Cowl WireB246Floor Wire

2001 PRIUS (EWD414U)
ENGINE CONTROL
120A MAIN
1C 1
D 11B 215A
AM2 1J 92C 2
2G 176AM2 IG2
ST2
32 512B 5
2G 11
1J 3
1K 3
BL 1A 2
EA 15A
EFI
32 51
1F 11A10 1A31A4 13 25
1F 12 1F13
IA2 4IA114
7 3
IGA C
B AIA1 19 A
AA A
FUSIBLE LINK
BLOCK NO. 2 F18
JUNCTION CONNECTORB J 4 A , J 5FUSIBLE LINK
BLOCK NO. 1D F1 2 C , F13
W±BW±B W±B W±BB±G B W±R W±R
B±W B±W
B±W
B B G±RB±R G±R
B±R
B B
BB
W±B
B
B±W
B±W
R±W
G± R
G± R
B
B B±W
B±W
A C
FUEL PUMP F1 6
CIR OPN
RELAY
EFI
RELAY FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
IGNITION SW I15
IG2
RELAY
JUNCTION
CONNECTOR J17B
BATTERY
JUNCTION
CONNECTOR J 7
JUNCTION
CONNECTOR J 1
A
A
JUNCTION
CONNECTOR
IEBC1 8
A
W±BJ18
W±B W±B
M