Toyota 2007 RAV4 Electrical Wiring Diagram page 20

RELAY
Basically, an electrically operated
1. NORMALLY
switch which may be normally
CLOSED
closed (1) or open (2).
Current flow through a small coil
creates a magnetic field which either
opens or closes an attached switch.
2. NORMALLY
OPEN
RELAY, DOUBLE THROW
A relay which passes current
through one set of contacts or the
other.
RESISTOR
An electrical component with a fixed
resistance, placed in a circuit to
reduce voltage to a specific value.
RESISTOR, TAPPED
A resistor which supplies two or
more different non adjustable
resistance values.
RESISTOR, VARIABLE or RHEOSTAT
A controllable resistor with a variable
rate of resistance.
Also called a potentiometer or
rheostat.
SENSOR (Thermistor)
A resistor which varies its resistance
with temperature.
SENSOR, SPEED
Uses magnetic impulses to open
and close a switch to create a signal
for activation of other components.
(Reed Switch Type)
SHORT PIN
Used to provide an unbroken
connection within a junction block.
SOLENOID
An electromagnetic coil which forms
a magnetic field when current flows,
to move a plunger, etc.
RAV4 (EM03T0U)
SPEAKER
An electromechanical device which
creates sound waves from current
flow.
SWITCH, MANUAL
Opens and closes Opens and closes
circuits, thereby circuits, thereby
1. NORMALLY
stopping (1) or
OPEN
allowing (2) current
flow.
2. NORMALLY
CLOSED
SWITCH, DOUBLE THROW
A switch which continuously passes
current through one set of contacts
or the other.
SWITCH, IGNITION
A key operated switch with several
positions which allows various
circuits, particularly the primary
ignition circuit, to become
operational. operational.
SWITCH, WIPER PARK
Automatically returns wipers to the
stop position when the wiper switch
is turned off.
TRANSISTOR
A solidstate device typically used as
an electronic relay; stops or passes
current depending on the voltage
applied at "base".
WIRES
Wires are always drawn as
(1) NOT
straight lines on wiring
CONNECTED
diagrams.
Crossed wires (1) without a
black dot at the junction are black dot at the junction are
not joined;
crossed wires (2) with a
black dot or octagonal (
(2) SPLICED
mark at the junction are
spliced (joined)
connections.
E
)
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