engine TOYOTA PRIUS 2001 Service Repair Manual

I17789
1 2 3456
7 A B
C
D E
Fuses: Relays: Engine Room R/B No. 3:
G H
1. HTR2 Fuse
2. HTR1 Fuse
3. ABS No. 4 Fuse
4. ABS No. 1 Fuse5. EMPS Fuse
6. HTR3 Fuse
7. DRL FuseA. A/C W/P Relay
B. ABS SOL Relay
C. DRL Relay
D. HTR2 RelayE. HTR1 Relay
G. HTR3 Relay
H. EPMS Relay
Engine Room R/B No. 2:
A B C
Relays:
A. IGCT Relay
B. HYDRO MTR No. 2 Relay
C. HYDRO MTR No. 1 Relay
± BODY ELECTRICALPOWER SOURCE
BE±15
1682 Author: Date:
2001 PRIUS (RM778U)

I17862
Wire Harness Side
h±10±1±A
± BODY ELECTRICALHEADLIGHT AND TAILLIGHT SYSTEM
BE±21
2001 PRIUS (RM778U)
6. INSPECT DAYTIME RUNNING LIGHT MAIN RELAY
CIRCUIT
Disconnect the connector from the relay and inspect the con-
nector on the wire harness side.
Tester connectionConditionSpecified condition
2 ± GroundConstantContinuity
3 ± GroundConstantBattery voltage
4 ± GroundTerminal 5 groundBattery voltage
6 ± GroundConstantBattery voltage
7 ± GroundLight control switch OFF or TAILNo continuity
7 ± GroundLight control switch HEADContinuity
8 ± GroundHeadlight dimmer switch FLASH or HIContinuity
9 ± GroundEngine runningBattery voltage
12 ± GroundIgnition switch OFFNo voltage
12 ± GroundIgnition switch ONBattery voltage
If circuit is specified, try replacing the relay with a new one.
If circuit is not as specified, inspect the circuits connected to oth-
er parts.

I17791
0.4 °
3 m (9.84 ft) H 29.7 mm
(1.17 in.)
7
V RH Line
W90 °
V LH Line4
Low Beam:
V LH LineV Line V RH Line 65
6
29.7 mm
(1.17 in.)
High Beam:
V LH LineV Line V RH Line 6
5629.7 mm
(1.17 in.)
29.7 mm
(1.17 in.) H 4
O: step No.
7
H4
W
W
± BODY ELECTRICALHEADLIGHT AND TAILLIGHT SYSTEM
BE±23
2001 PRIUS (RM778U)
ADJUST HEADLIGHT AIM ONLY
(a) Place the vehicle in the following conditions.

The area around the headlight is not deformed.

The vehicle is parked on a level surface.

Tire inflation pressure is the specified value.

A driver is in the driver's seat and the vehicle is in
a state ready for driving (with a tank full).

The vehicle has been bounced several times.
(b) Check the headlight aiming.
(1) Prepare a thick white paper.
(2) Stand the paper perpendicular to the ground at the
position 9.84 ft away from the headlights.
(3) Ensure that the center line of the vehicle and the pa-
per face forms a 90±degree angle as shown in the
illustration.
(4) Draw a horizontal line (H line) on the paper, showing
where the headlights should strike.
(5) Draw a vertical line (V line) to where the center line
of the vehicle is to be.
(6) Draw 2 vertical lines (by connecting the low and
high beam center marks) to where the both head-
lights should strike (V RH and V LH lines).
(7) Draw a horizontal line (by connecting the both low
beam center marks) to where the headlights should
strike (H RH and H LH lines).
(8) Start the engine.
(9) Turn the headlights ON.
(10) Check that the headlights properly strike the posi-
tion shown in the illustration.
(11) If not, adjust the lights in the vertical direction.
HINT:
As shown in the illustration, adjust each aim of the RH and LH
lights.
(c) When adjusting it in the vertical direction:
Using adjusting bolt, adjust the headlight aim to within the
specified range.

BE1VS±02
I18849
Brake Master Cylinder

Brake Fluid Level Warning Switch
Combination Meter Assembly

Meter Circuit
Multi Display
Ignition Switch
Instrument Panel J/B

Body ECU

GAUGE Fuse
Stop Light Switch
Engine Room J/B

DOME Fuse
Seat Belt Buckle Switch
Occupant Detection
Sensor
± BODY ELECTRICALCOMBINATION METER
BE±37
1704 Author: Date:
2001 PRIUS (RM778U)
COMBINATION METER
LOCATION

I17798
A20
A12
A14
A2
A3
A1
B7
B6
B1
A9
A11
A13
A22
A21
B2
B3Conversion
Drive unit
Correspon
dence
Buzzer
Power Supply
Circuit (VFD)
ECU
Drive unit
Open door indicator
Illumination
Brake warning
Driver seat belt warning
Low oil pressure warning
Discharge warning
CRUISE main indicator
Engine coolant warning (Low)
Engine coolant warning (High)
Passenger seat belt warning
Malfunction indicator
ABS warning
SRS warning
Left turn indicator
Right turn indicator
Hi±beam indicator B5
A19
A18
A17A15 A16 A10 B4 Output control indicator BE±40
± BODY ELECTRICALCOMBINATION METER
2001 PRIUS (RM778U)

No. Wiring connector side
1
2
3
10
11
12
13
14
15
16
17
18
19
20
21
22EMPS ECU
Fuel tank temperature (+)
Hybrid vehicle control ECU (4P)
Ground
Ground
Center airbag sensor assembly
Headlight dimmer switch
Turn signal switch (Right)
Turn signal switch (Left)
Fuel tank temperature (±)
DOME Fuse
GAUGE FuseODO/TRIP switch (TC)
ODO/TRIP switch (E)
ODO/TRIP switch (ODO)
9 ABS ECU (SI)
ABS ECU (ABS)
2
3
4
5
6
7 1 Back±up light relay
Body ECU
Engine ECM
ACC Fuse
Light control rheostat (TC)
Light control rheostat (TR) A
BBody ECU
± BODY ELECTRICALCOMBINATION METER
BE±41
2001 PRIUS (RM778U)

I17865
Fuel Sender Gauge Connector
I17865
Fuel Sender Gauge Connector
I01277
BatteryWarning Light Ignition
Switch
Wire Harness Side
1
I01278
BE±44
± BODY ELECTRICALCOMBINATION METER
2001 PRIUS (RM778U)
5. INSPECT FUEL SENDER GAUGE VOLTAGE
Measure the voltage between terminals 1 and 6 for each fuel
level.
HINT:
The fuel sender gauge cannot be removed.
As the resistance value changes according to the remaining
fuel amount, refer to the above standard value.
Fuel levelResistance (W)
FullApprox. 430
HalfApprox. 1000 ± 2000
EmptyApprox. 5000
If resistance value is not as specified, replace the fuel tank.
If resistance value is as specified, replace the combination me-
ter.
6. INSPECT TEMPERATURE SENDER RESISTANCE
Measure the resistance between terminal 4 and 8
If the resistance value is not in the following area, replace fuel
tank.
1.5 ± 100 (W) at 0 ± 30°C
7. INSPECT LOW OIL PRESSURE WARNING LIGHT
(a) Disconnect the connector from the warning switch and
ground terminal of the wire harness side connector.
(b) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.
8. INSPECT LOW OIL PRESSURE SWITCH CONTINUITY
(a) Check that continuity exists between terminal and ground
with the engine stopped.
(b) Check that no continuity exists between terminal and
ground with the engine running.
HINT:
Oil pressure should be over 24.5 kPa (0.25 kgf/cm
2, 3.55 psi)
If operation is not as specified, replace the switch.

BE1217
BatteryWarning Light
Ignition
Switch
I11650
BE0044
BatteryWarning Light
Ignition
Switch
Z11183
± BODY ELECTRICALCOMBINATION METER
BE±45
2001 PRIUS (RM778U)
9. INSPECT BRAKE WARNING SYSTEM LIGHT
(a) Disconnect the connector from the brake fluid warning
switch.
(b) Connect terminals of the wire harness side of the level
warning switch connector.
(c) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or wire har-
ness.
10. INSPECT BRAKE FLUID LEVEL WARNING SWITCH
CONTINUITY
(a) Remove the reservoir tank cap and strainer.
(b) Disconnect the connector.
(c) Check that no continuity exists between terminals with the
switch OFF (float up).
(d) Use syphon, etc. to take fluid out of the reservoir tank.
(e) Check that continuity exists between terminals with the
switch ON (float down).
(f) Pour the fluid back in the reservoir tank.
If operation is not as specified, replace the switch.
11. INSPECT PARKING BRAKE WARNING LIGHT
(a) Disconnect the connector from the parking brake switch.
(b) Ground terminal of the wire harness side connector.
(c) Start the engine, check that the warning light lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.
12. INSPECT PARKING BRAKE SWITCH CONTINUITY
(a) Check that continuity exists between terminal and switch
body with the switch ON (switch pin released).
(b) Check that no continuity exists between terminal and
switch body with the switch OFF (switch pin pushed in).
If operation is not as specified, replace the switch or inspect
ground point.

Disarmed state
Perform any of the following and the system will go no to ºArming preparationº:

With all the doors, engine hood and luggage compartment door closed, lock all doors with the key.

With all the doors, engine hood and luggage compartment door closed, lock all doors with the
wireless remote.

With all the doors, engine hood and luggage compartment door closed, open and close any of doors,
engine hood or luggage compartment door, then close and lock all doors, engine hood and luggage
compartment door.
Arming preparation
Perform the following and the system will
go on to ºArmed stateº:

Let 30 seconds elapse with all the doors,
engine hood and luggage compartment door
closed and locked.
Perform any of the following and the system
will return to ºDisarmed stateº:

Open any of the doors, engine hood or luggage
compartment door.

Unlock any of the doors.

Put the key in the ignition.

Reconnect the battery.
Armed state
Perform any of the following and the system
will return to ºDisarmed stateº:

Unlock any of the doors or open the luggage
compartment door with the wireless remote.

Unlock the doors with the wireless remote.

Put the key in the ignition and turn it to ON.
Perform any of the following and the system
will go on to ºAlarm soundingº:

Open any of the doors.

Unlock any of the doors in any way other than
with a key or the wireless remote.

Open the luggage compartment door in any way
other than with a key.

Open the engine hood.

Reconnect the battery.

When input from optional glass break sensor is
detected (Dealer option)(Key not inserted in ignition.)
Alarm sounding
The vehicle's horn and security horn will sound,
and the hazard, interior, tail and head lights flash
for 60 seconds.
After the alarm has ended, the system will
return to ºArmed stateº. Perform any of the following and the system
will return to ºDisarmed stateº:

Unlock any of the doors or open the luggage
compartment door with the wireless remote.

Unlock the doors with the wireless remote.

Put the key in the ignition and turn it to ON.
BE±68
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
2001 PRIUS (RM778U)
2. ACTIVE ARMING MODE

 No key in ignition key cylinder.
 All doors and luggage compartment closed
 All doors unlocked
 Engine hood open
Lock and unlock by or remote control 3
times.
Lock and unlock the driver's door knob 3
times.
Open the driver's door.
After 2 sec., forced lock functions once.
Unlock the driver's door knob.
Close and open the driver's door 2 times.
Lock and unlock the driver's door knob once.
Afer 2 sec., forced lock functions once.
System without passive mode is set.System with passive mode is set.
Within
30 secs.
Within
20 secs.
HINT:

Initially (when shipping), system without passive mode is set..

Any input or output other than the above shall be regarded as invalid.(Start again from the beginning).
Input to the vehicle
Output from the vehicle
Close and open the driver's door 3, 4 or 5
times.
Lock and unlock the driver's door knob once.
After 2 sec., forced lock functions once.
Within
2 secs.
Within
2 secs. BE±74
± BODY ELECTRICALTHEFT DETERRENT SYSTEM
2001 PRIUS (RM778U)
4. CHANGING METHOD OF PASSIVE MODE
(ON or OFF)