ad blue TOYOTA PRIUS 2001 Service Repair Manual

2001 PRIUS (EWD414U)
B
[A]: System Title
[B]: Indicates a Relay Block. No shading is used and
only the Relay Block No. is shown to distinguish it
from the J/B
Example: Indicates Relay Block No.1
[C]: ( ) is used to indicate different wiring and
connector, etc. when the vehicle model, engine
type, or specification is different.
[D]: Indicates related system.
[E]: Indicates the wiring harness and wiring harness
connector. The wiring harness with male terminal is
shown with arrows (
).
Outside numerals are pin numbers.
Female Male ( )
The first letter of the code for each wiring harness
and wiring harness connector(s) indicates the
component's location, e.g, ºEº for the Engine
Compartment, ºIº for the Instrument Panel and
Surrounding area, and ºBº for the Body and
Surrounding area.
When more than one code has the first and second
letters in common, followed by numbers (e.g, IH1,
IH2), this indicates the same type of wiring harness
and wiring harness connector.
[F]: Represents a part (all parts are shown in sky blue).
The code is the same as the code used in parts
position.
[G]: Junction Block (The number in the circle is the J/B
No. and the connector code is shown beside it).
Junction Blocks are shaded to clearly separate
them from other parts.
3C indicates
that it is inside
Junction Block
No.3 Example:

[H]: When 2 parts both use one connector in common,
the parts connector name used in the wire routing
section is shown in square brackets [ ].[I]: Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
B = Black W = White BR = Brown
L = Blue V = Violet SB = Sky Blue
R = Red G = Green LG = Light Green
P = Pink Y = Yellow GR = Gray
O = Orange
The first letter indicates the basic wire color and the
second letter indicates the color of the stripe.
Example: L ± Y
L
(Blue)Y
(Yellow)
[J]: Indicates a wiring Splice Point (Codes are ºEº for the
Engine Room, ºIº for the Instrument Panel, and ºBº
for the Body).
The Location of splice Point I 5 is indicated by the
shaded section.
[K]: Indicates a shielded cable.
[L]: Indicates the pin number of the connector.
The numbering system is different for female and
male connectors.
Example:
Numbered in order
from upper left to
lower rightNumbered in order
from upper right to
lower left
Female
Male
[M]: Indicates a ground point.
The first letter of the code for each ground point(s)
indicates the component's location, e.g, ºEº for the
Engine Compartment, ºIº for the Instrument Panel
and Surrounding area, and ºBº for the Body and
Surrounding area.
[N]: Page No.

2001 PRIUS (EWD414U)
K
AABBCC
DDEE F FAAB CC
AABBBBCCB A
AABBBA A A A A
AAAAA AA
AAAA
C
E E C C
E EC C
E EB B
E DB A
D D AA
D
AAAAAA
BBBCCCAAAAAA
BBBCCC
AA
AAAA
AABBCC
DDEE F F
AABBCC
DDEE F F
AABBCC
DDDE E EAABBCC
DDDE E E
AA
AAAA
AAAAAA
BBBCCCAAAAAA
BBBCCCC
E E C C
E EC C
E EB B
E DB A
D D AA
D
C
E E C C
E EC C
E EB B
E DB A
D D AA
DAABBCC
DDDE E EAABBCC
DDDE E EAAAAAA
BBBCCC
AAAAAA
BBBCCCC
F F C C
F F C B
E E B B
E E B A
D D AA
DE
H H E D
H HD C
G GC C
G FB B
F F AA
F
J5 J6 J7
J8 J9 J10 J11 J12
J13 J14 J15 J16
J17BLUE
GRAY GRAY BLACK
BLACK BLACKJ6(w/ Daytime Running Light) (w/o Daytime Running Light)
J19 J20 J18GRAY GRAY
J21 J22 J23 J24
J25 J26 J27BLACK BLACK GRAY
GRAYBLUE

2001 PRIUS (EWD414U)
K CONNECTOR LIST
112
345612
1212121
E
H H E D
H HD C
G GC C
G FB B
F F AA
F
AAAA
AABBCC
DDDE E EAABBCC
DDDE E E
AAAAAA
BBBCCCAAAAAA
BBBCCC
5 4 3 2 1
12345
678910123
4561237
14 136 5
12 114 3
10 9 2 1
8
10 9 8 7 65 4 3 2 1
12 3
45678
1212
3456789
10 11
12 13 14 15 1617 18
10 9 8 7 65 4 3 2 1
11
12 3
4567891
121234
1212
345612
345612
3456
J28 J29 J30 J31
J32 J33 K1BLUE BLACK BLACK BLACK
GRAY GRAY DARK GRAY
L1 L2
L3 L4 L5 L6GRAY
GRAY
M1BLACK
M2 M3 M4 M5
M6 M7 N1 N2 N3
N4 O1 P1 P2 P3 P4GRAY GRAY GRAY
BLUE BLUE GRAY
BLACK
P5 P6 P7 P8GRAY

2001 PRIUS (EWD414U)
K
1
234 5678
9
10 11 12 13 14 15 16 17 18 192012
34
56
121212
12
2 1
2 112
345612 34
56 78910
5 4 3 2 1
6789101112
12345678910
12
34
5612
34
56
1
21
2
1 2
3 4
5 61 2
3 4
5 612
34
123
456
1
32
412
34
12
3412122 1
345671
1111
12
123412 34
56789101112
12 3
456 78
2 12
34 1
P9 P10 P11 P12 P13
P14 P15 R1 R2 R3BLUE BLACK
BLACK
R4 R5 R6 R7 R8 R9
R10 R11 S1 S2 S3 S4
S5 S6 S7 S8 S9
GRAY YELLOW
YELLOW YELLOW YELLOW
S10 S11 S12 T1BLACKT2
T3 T4 T5 T6 U1BLACK
BLACK BLACK

2001 PRIUS (EWD414U)
K CONNECTOR LIST
123121212312
121231212125 4 3 2 1
V1 V2 V3 V4 V5BLACK BLUE BROWN BLACK BLACK
V6 W1 W2 W3 W4W5BLUE BLACK BLACK GRAY DARK GRAY

M
2001 PRIUS (EWD414U)
[A]: System Title
[B]: Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
B = Black W = White BR = Brown
L = Blue V = Violet SB = Sky Blue
R = Red O = Orange LG = Light Green
P = Pink Y = Yellow GR = Gray
G = Green
The first letter indicates the basic wire color and the
second letter indicates the color of the stripe.
Example: L ± Y
L
(Blue)Y
(Yellow)
[C]: The position of the parts is the same as shown in
the wiring diagram and wire routing.
[D]: Indicates the pin number of the connector.
The numbering system is different for female
and male connectors.
Example :
Numbered in order
from upper left to
lower rightNumbered in order
from upper right to
lower left
Female Male
The numbering system for the overall wiring
diagram is the same as above
[E]: Indicates a Relay Block. No shading is used and
only the Relay Block No. is shown to distinguish
it from the J/B.
Example : Indicates Relay Block No.1
[F]: Junction Block (The number in the circle is the
J/B No. and the connector code is shown beside
it). Junction Blocks are shaded to clearly
separate them from other parts.
3C indicates
that it is inside
Junction Block
No.3 Example:

[G]: Indicates related system.
[H]: Indicates the wiring harness and wiring harness
connector. The wiring harness with male
terminal is shown with arrows (
).
Outside numerals are pin numbers.
Female Male ( )
[I]: ( ) is used to indicate different wiring and
connector, etc. when the vehicle model, engine
type, or specification is different.
[J]: Indicates a shielded cable.
[K]: Indicates and located on ground point.
[L]: The same code occuring on the next page
indicates that the wire harness is continuous.

IN±16
± INTRODUCTIONFOR ALL OF VEHICLES
16 Author: Date:
2001 PRIUS (RM778U)
6. ACTIONS TO BE TAKEN FOR VEHICLE DAMAGED BY
IMPACT
(a) Items to be prepared (For operation at the site of acci-
dent)

Protective clothing (Insulated gloves, rubber
gloves, goggles, and safety shoes)

Saturated boric acid solution 20 L (Procure 800 g of
boric acid powder, put it into a container, and dis-
solve it in water.)

Red litmus paper

ABC fire extinguisher (Applicable to both oil flames
and electrical flames)

Waste rags or old towels (For wiping off the electro-
lyte)

Vinyl tape (For insulating cable)

Electrical tester
(b) Actions to be taken at the place of accident
(1) Wear insulated or rubber gloves, goggles and safe-
ty shoes.
(2) Do not touch a bare cable that could be a high±volt-
age cable. If you need to touch it, or if you have a
danger of making an accidental contact, wear insu-
lated gloves, measure the voltage between the
cable and body ground using an electrical tester,
and insulate the cable using vinyl tape.
(3) If the vehicle catches fire, use a ABC fire extinguish-
er to extinguish the fire. Trying to extinguish the fire
using only a small amount of water can be more
dangerous than effective: either use a greater
amount of water from a fire hydrant or wait for the
fire fighters.
(4) If the vehicle is partially submerged in water, do not
touch the service plug or any of the high±voltage
components and cables because of the danger of
electrocution. If you need to touch them, do so only
after pulling the vehicle completely out of water.
(5) Check the HV battery and nearby area for any leak-
age of the electrolyte. Do not touch any leaking liq-
uid because it could be the highly alkaline electro-
lyte. If you need to wipe it off (using rags etc.), do so
only after completing the following procedure: wear
the rubber gloves and goggles, neutralize the elec-
trolyte with saturated boric acid solution, and finally
apply a red litmus paper to make sure that it does
not turn blue.

± INTRODUCTIONFOR ALL OF VEHICLES
IN±19
19 Author: Date:
2001 PRIUS (RM778U)
(d) Actions required after moving the damaged vehicle
If you see any liquid on the road surface, it could be the leakage
of the highly alkaline electrolyte.
Wearing rubber gloves and goggles, apply a red litmus paper
to the liquid. If the litmus paper turns blue, neutralize the liquid
using the saturated boric acid solution and reapply a red litmus
paper to make sure that it does not turn blue. Then wipe the liq-
uid off from the road surface using waste rags, etc.
(e) Items to be prepared (When repairing damaged vehicles)

Protective clothing (Insulated gloves, rubber
gloves, goggles, and safety shoes)

Saturated boric acid solution 20 L (Procure 800 g of
boric acid powder, put it into a container, and dis-
solve it in water.)

Red litmus paper

Waste rags or old towels (For wiping off the electro-
lyte)

Vinyl tape (For insulating cable)

Electrical tester
(f) Precautions to be observed when servicing the damaged
vehicle:
(1) Wear insulated or rubber gloves, goggles, and safe-
ty shoes.
(2) Do not touch a bare cable that could be a high±volt-
age cable. If you need to touch it, or if you have a
danger of making an accidental contact, wear insu-
lated gloves, measure the voltage between the
cable and the body ground using an electrical tes-
ter, and insulate the cable using a vinyl tape.
(3) Check the HV battery and nearby area for leakage.
If you find any liquid, it could be the leakage of the
highly alkaline electrolyte. Wear rubber gloves and
goggles, and then apply a red litmus paper to the
leak. If the litmus paper turns blue, neutralize the liq-
uid using the saturated boric acid solution and reap-
ply a red litmus paper to make sure that it does not
turn blue. Then wipe the liquid off using waste rags
etc.
(4) If the electrolyte adheres to your skin, wash the skin
immediately using the saturated boric acid solution
or large amounts of water. If the electrolyte adheres
to an article of clothing, take it off immediately.
(5) If the electrolyte comes into contact with your eyes,
call out loudly for help. Do not rub your eyes but
wash them with the saturated boric acid solution or
large amounts of water and seek medical care.

V08423 Knock Sensor 1
GRECM
KNK
E1 12
E6
WIRING DIAGRAM
Wiring Diagram
This shows a wiring diagram of the circuit.
Use this diagram together with ELECTRICAL
WIRING DIAGRAM to thoroughly understand the
circuit.
Wire colors are indicated by an alphabetical code.
B = Black, L = Blue, R = Red, BR = Brown,
LG = Light Green, V = Violet, G = Green,
O = Orange, W = White, GR = Gray, P = Pink,
Y = Yellow, SB = Sky Blue
The first letter indicates the basic wire color and
the second letter indicates the color of the stripe.
DTC P0325Knock Sensor 1 Circuit Malfunction
CIRCUIT DESCRIPTION
Knock sensor is fitted to the cylinder block to detect engine knocking. This sensor contains a piezoelectric element which
generates a voltage when it becomes deformed, which occurs when the cylinder block vibrates due to knocking. If engine
knocking occurs, ignition timing is retarded to suppress it.
DTC No. DTC Detecting Condition Trouble Area
P0325No knock sensor 1 signal to ECM with engine speed,
1,200 rpm or more.
Open or short in knock sensor1 circuit

Knock sensor 1 (looseness)

ECM
If the ECM detects the above diagnosis conditions, it operates the fall safe function in which the corrective retard angle
value is set to the maximum value.

Diagnostic Trouble Code No. and Detection Item

Circuit Description
The major role and operation, etc. of the circuit
and its component parts are explained.

Indicates the diagnostic trouble code, diagnostic
trouble code set parameter and suspect area of
the problem.


± INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN±39
2001 PRIUS (RM778U)
6. CIRCUIT INSPECTION
How to read and use each page is shown below.

PP3AD±01
± PREPARATIONAIR CONDITIONING
PP±57
11 8 Author: Date:
2001 PRIUS (RM778U)
AIR CONDITIONING
SST (Special Service Tools)
07110±58060Air Conditioner Service Tool Set
(07117±78050)Refrigerant Charging Gauge
(07117±88060)Refrigerant Charging HoseDischarge (Red)
(07117±88070)Refrigerant Charging HoseSuction (Blue)
(07117±88080)Refrigerant Charging HoseUtility (Green)
(07117±58060)Refrigerant Drain Service Valve
(07117±58080)Quick Disconnect AdapterDischarge (diam. 16 mm)
(07117±58090)Quick Disconnect AdapterSuction (diam. 13 mm)
(07117±58070)T±Joint
07116±38360Gas Leak Detector Assembly
07112±76050Magnetic Clutch Stopper
07112±66040Magnetic Clutch Remover