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HOW TO USE THIS MANUAL B
This manual provides information on the electrical circuits installed on vehicles by
dividing them into a circuit for each system.
The actual wiring of each system circuit is shown from the point where the power
source is received from the battery as far as each ground point. (All circuit
diagrams are shown with the switches in the OFF position.)
When troubleshooting any problem, first understand the operation of the circuit
where the problem was detected (see System Circuit section), the power source
supplying power to that circuit (see Power Source section), and the ground points
(see Ground Point section). See the System Outline to understand the circuit
operation.
When the circuit operation is understood, begin troubleshooting of the problem
circuit to isolate the cause. Use Relay Location and Electrical Wiring Routing
sections to find each part, junction block and wiring harness connectors, wiring
harness and wiring harness connectors, splice points, and ground points of each
system circuit. Internal wiring for each junction block is also provided for better
understanding of connection within a junction block.
Wiring related to each system is indicated in each system circuit by arrows
(from__, to__). When overall connections are required, see the Overall Electrical
Wiring Diagram at the end of this manual.
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2004 COROLLA (EWD533U)
B HOW TO USE THIS MANUAL
[A]
*
The system shown here is an EXAMPLE ONLY. It is different to the actual
circuit shown in the SYSTEM CIRCUITS SECTION.
Stop Light
From Power Source System (See Page 66)
15A
STOP
7.5A
GAUGE
4
RL
2
IB
[B]
1
3
IB
1
IB
[C]
[G]
2
IB
2
S 6
4
Stop Light SW
14
IE1
[E]
C 7
[D]
Combination
Meter
1
13
ABS ECU
GW
I 5
[F]
7
8
Light Failure Sensor
4
2
1
11
[H]
1
GR
[ I ]
BV1
B18
[J]
(Shielded)
4
3
2
H17
[K]
High Mounted
Stop Light
1
3
6
1
WB
BV1
B18
BO
[L]
BL
4
50
[M]
2004 COROLLA (EWD533U)
L 4
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
[H]
: 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
[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.
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
Y
(Yellow)
[I]
: Indicates a wiring Splice Point (Codes are ”E” for the
Engine Room, ”I” for the Instrument Panel, and ”B”
for the Body).
L
(Blue)
Female
Male ( )
The first letter of the code for each wiring harness
and wiring harness connector(s) indicates the
component’s location, e.g, ”E” for the Engine
Compartment, ”I” for the Instrument Panel and
Surrounding area, and ”B” 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.
The Location of splice Point I 5 is indicated by the
shaded section.
[J]
: Indicates a shielded cable.
[K]
: Indicates the pin number of the connector.
The numbering system is different for female and
male connectors.
Example:
Example: Numbered in order
from upper left to
lower right
Numbered in order
from upper right to
lower left
3C indicates that
it is inside
Junction Block
No.3
Female
Male
[L]
: Indicates a ground point.
The first letter of the code for each ground point(s)
indicates the component’s location, e.g, ”E” for the
Engine Compartment, ”I” for the Instrument Panel
and Surrounding area, and ”B” for the Body and
Surrounding area.
[M]
: Page No.
5
2004 COROLLA (EWD533U)
B HOW TO USE THIS MANUAL
[N]
System Outline
Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.
When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also flows
through the rear lights warning light to TERMINAL 4 of the light failure sensor.
Stop Light Disconnection Warning
When the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the current
flowing from TERMINAL 7 of the light failure sensor to TERMINALS 1, 2 changes, so the light failure sensor detects the
disconnection and the warning circuit of the light failure sensor is activated.
As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear lights
warning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the warning
circuit on and holds the warning light on until the ignition SW is turned off.
[O]
Service Hints
S6 Stop Light SW
2–1 : Closed with the brake pedal depressed
L4 Light Failure Sensor
1, 2, 7–Ground : Approx. 12 volts with the stop light SW on
4, 8–Ground : Approx. 12 volts with the ignition SW at ON position
11–Ground : Always continuity
[P]
: Parts Location
Code
See Page
Code
See Page
Code
See Page
C7
34
L4
36
R7
37
H17
36
R6
37
S6
35
[Q]
: Relay Blocks
Code
See Page
Relay Blocks (Relay Block Location)
1
18
R/B No.1 (Instrument Panel Brace LH)
[R]
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
IB
20
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
3C
22
Instrument Panel Wire and J/B No.3 (Instrument Panel Brace LH)
[S]
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IE1
42
Floor Wire and Instrument Panel Wire (Left Kick Panel)
BV1
50
Luggage Room Wire and Floor Wire (Luggage Room Left)
[T]
: Ground Points
Code
See Page
Ground Points Location
BL
50
Under the Left Center Pillar
BO
50
Back Panel Center
[U]
: Splice Points
Code
See Page
Wire Harness with Splice Points
Code
See Page
Wire Harness with Splice Points
I5
44
Cowl Wire
B18
50
Luggage Room Wire
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2004 COROLLA (EWD533U)
B
[N]
: Explains the system outline.
[O]
: Indicates values or explains the function for reference during troubleshooting.
[P]
: Indicates the reference page showing the position on the vehicle of the parts in the system circuit.
Example : Part ”L4” (Light Failure Sensor) is on page 36 of the manual.
*
Parts is 4th in order
Light Failure Sensor
[Q]
: Indicates the reference page showing the position on the vehicle of Relay Block Connectors in the system circuit.
Example : Connector ”1” is described on page 18 of this manual and is installed on the left side of the instrument
panel.
[R]
: Indicates the reference page showing the position on the vehicle of J/B and Wire Harness in the system circuit.
Example : Connector ”3C” connects the Instrument Panel Wire and J/B No.3. It is described on page 22 of this
manual, and is installed on the instrument panel left side.
[S]
: Indicates the reference page describing the wiring harness and wiring harness connector (the female wiring
harness is shown first, followed by the male wiring harness).
Example : Connector ”IE1” connects the floor wire (female) and Instrument panel wire (male). It is described on
page 42 of this manual, and is installed on the left side kick panel.
[T]
: Indicates the reference page showing the position of the ground points on the vehicle.
Example : Ground point ”BO” is described on page 50 of this manual and is installed on the back panel center.
[U]
: Indicates the reference page showing the position of the splice points on the vehicle.
Example : Splice point ”I5” is on the Cowl Wire Harness and is described on page 44 of this manual.
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2004 COROLLA (EWD533U)
The letter in the code is from the first letter of the part, and the number indicates its order in parts
starting with that letter.
Example : L 4
Á
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Inne pliki z tego folderu:
TVIP.pdf
(67 KB)
overall diagram.pdf
(671 KB)
starting and ignition.pdf
(36 KB)
routing.pdf
(262 KB)
relay locations.pdf
(195 KB)
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