TOYOTA PRIUS 2001 Service Repair Manual

I17788
Instrument Panel J/B:
Fuses: Relays:
A. IG1 Relay
B. ACC Relay
C. TAIL Relay
D. POWER Relay
E. DEF Relay
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 A
B C
D
16
E
1. HTR Fuse
2. STOP Fuse
3. ECU±B Fuse
4. DOOR Fuse
5. OBDII Fuse
6. PWR1 Fuse
7. AM1 Fuse8. GAUGE Fuse
9. ECU±IG Fuse
10. WIPER Fuse
11. WASHER Fuse
12. PANEL Fuse
13. TAIL Fuse
14. ACC Fuse15. CIG Fuse
16. SRS ACC Fuse
17. PWR Fuse
18 DEF Fuse
1718 BE±14
± BODY ELECTRICALPOWER SOURCE
1681 Author: Date:
2001 PRIUS (RM778U)

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)

BE1UX±02
I14295
7
8
13
14 16
17
HI
Flash OFFTAIL HEAD LO
Z05930
1
2
31
55 3
2
N14863
12
35
12 35
Z05930
1
2
351
2 3
5 BE±20
± BODY ELECTRICALHEADLIGHT AND TAILLIGHT SYSTEM
2001 PRIUS (RM778U)
INSPECTION
1. INSPECT LIGHT CONTROL SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
OFF±No continuity
TAIL14 ± 16Continuity
HEAD13 ± 14 ± 16Continuity
If continuity is not as specified, replace the switch.
2. INSPECT HEADLIGHT DIMMER SWITCH CONTINU-
ITY
Switch positionTester connectionSpecified condition
Low beam16 ± 17Continuity
High beam7 ± 16Continuity
Flash7 ± 8 ± 16Continuity
If continuity is not as specified, replace the switch.
3. INSPECT HEADLIGHT CONTROL RELAY CONTINU-
ITY
ConditionTester connectionSpecified condition
Constant1 ± 3Continuity
Apply B+ between
terminals 1 and 2.2 ± 5Continuity
If continuity is not as specified, replace the relay.
4. INSPECT TAILLIGHT CONTROL RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 ± 2Continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
If continuity is not as specified, replace the relay.
5. INSPECT DRL RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 ± 3Continuity
Apply B+ between
terminals 1 and 2.2 ± 5Continuity
If continuity is not as specified, replace the relay.

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.

BE1CY±05
I23044
For Adjustment in
Vertical Direction
BE±22
± BODY ELECTRICALHEADLIGHT AND TAILLIGHT SYSTEM
2001 PRIUS (RM778U)
ADJUSTMENT

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.

BE1V0±02
I17855
I14261
2
I14287
ON
OFF
I11720
I01267
ON
OFF
± BODY ELECTRICALINTERIOR LIGHT SYSTEM
BE±27
2001 PRIUS (RM778U)
INSPECTION
1. INSPECT FRONT PERSONAL LIGHT CONTINUITY
Using an ohmmeter, check that continuity exists between termi-
nals.
If continuity is not as specified, replace the light assembly or
bulb.
2. INSPECT INTERIOR LIGHT CONTINUITY
(a) Disconnect the connector from the room light.
(b) Turn the room light switch ON, check that continuity exists
between terminal 1 and body ground.
If continuity is not as specified, replace the light assembly or
bulb.
3. INSPECT DOOR COURTESY SWITCH CONTINUITY
(a) Check that continuity exists between terminals and the
switch body with the switch ON (Switch pin released:
opened door).
(b) Check that no continuity exists between terminals and the
switch body with the switch OFF (Switch pin pushed in:
closed door).
If operation is not as specified, replace the switch.
4. INSPECT LICENCE PLATE LIGHT CONTINUITY
Using an ohmmeter, check that continuity exists between termi-
nals.
If continuity is not as specified, replace the light assembly or
bulb.
5. INSPECT LUGGAGE COMPARTMENT DOOR COUR-
TESY SWITCH CONTINUITY
(a) Check that continuity exists between terminals and the
switch body with the switch ON (Switch pin released:
opened door).
(b) Check that no continuity exists between terminals and the
switch body with the switch OFF (Switch pin pushed in:
closed door).
If operation is not as specified, replace the switch.

I01268
1 2 BE±28
± BODY ELECTRICALINTERIOR LIGHT SYSTEM
2001 PRIUS (RM778U)
6. INSPECT LUGGAGE COMPARTMENT LIGHT CONTI-
NUITY
Using an ohmmeter, check that continuity exists between termi-
nals.
If continuity is not as specified, replace the light assembly or
bulb.

I14298
2 87
11
17
16
MISTLO
OFF HI
INT
Washer ON
BE1V1±01
I01313
2 7
16
I01314
2 7
16 17
INT time control
switch positionVoltage
Approx. 1 ~ 3 sec.
Battery voltage
0 Volt
Battery voltage
0 Volt Approx. 10 ~ 15 secs. FAST
SLOW
BE±34
± BODY ELECTRICALWIPER AND WASHER SYSTEM
2001 PRIUS (RM778U)
INSPECTION
1. INSPECT FRONT WIPER AND WASHER SWITCH
CONTINUITY
Switch positionTester connectionSpecified condition
OFF7 ± 16Continuity
INT7 ± 16Continuity
LO7 ± 17Continuity
HI8 ± 17Continuity
Washer ON2 ± 11Continuity
If continuity is not as specified, replace the switch.
2. INSPECT FRONT WIPER INTERMITTENT OPERA-
TION
(a) Turn the wiper switch to INT position.
(b) Turn the intermittent time control switch to FAST position.
(c) Connect the positive (+) lead from the battery to terminal
16 and the negative (±) lead to terminal 2.
(d) Connect the positive (+) lead from the voltmeter to termi-
nal 7 and the negative (±) lead to terminal 2, check that
the meter needle indicates battery voltage.
(e) After connecting terminal 16 to terminal 17, connect to
terminal 2 to terminal 17, check the voltage rises from 0
volts to battery voltage with in the times, as shown in the
table.
If operation is not as specified, replace the wiper and washer
switch.

I01313
2 7
16
Washer Switch ON
Battery voltageLess than 1 sec. Approx. 3 secs. OFF
0 Volt
I11672
54
I11673
4 3
I11674
5
4
± BODY ELECTRICALWIPER AND WASHER SYSTEM
BE±35
2001 PRIUS (RM778U)
3. INSPECT FRONT WASHER LINKED OPERATION
(a) Connect the positive (+) lead from the battery to terminal
16 and the negative (±) lead to terminal 2.
(b) Connect the positive (+) lead from the voltmeter to termi-
nal 7 and the negative (±) lead to terminal 2.
(c) Push in the washer switch, and check that the voltage
changes, as shown in the table.
If operation is not as specified, replace the wiper and washer
switch.
4. Low Speed:
INSPECT FRONT WIPER MOTOR OPERATION
Connect the positive (+) lead from the battery to terminal 5 and
the negative (±) lead to terminal 4, check that the motor oper-
ates at low speed.
If operation is not as specified, replace the motor.
5. High Speed:
INSPECT FRONT WIPER MOTOR OPERATION
Connect the positive (+) lead from the battery to terminal 3 and
the negative (±) lead to terminal 4, check that the motor oper-
ates at high speed.
If operation is not as specified, replace the motor.
6. Stopping at Stop Position:
INSPECT FRONT WIPER MOTOR OPERATION
(a) Operate the motor at low speed and stop the motor opera-
tion anywhere except at the stop position by disconnect-
ing positive (+) lead from terminal 5.