oil change MAZDA PROTEGE 1992 Owner's Manual

T
ELECTRICAL SYMBOLS
Switches and Relays OUTLINE
There is an NC (normally closed) and NO (normally open) indication for switches and relays which shows
when no change of operation conditions has occurred.
Relay Switch
NO type relay NC type relay NO switch NC switch
Not in operation
(No power supply) +E+ #Fig -o-- -da--
ax ax
STOP
FLOW STOP FLOW
In operation
(Power supply) * !jiij! kiig 6 dLe
cw r”X
FLOW STOP FLOW STOP
Other Electrical Symbols
BATTERY
THERMISTER DIODE CONDENSER
Q
M
MOTOR I
T-10
l-
BODY GROUND
COIL, SOLENOID i
0 8 HOLDER BOX
FUSE
RESISTOR
1
T
FUSIBLE LINK
1 i 1
VARIABLE RESISTOR
LIGHT
HEATER
69G15X-O(

Reading Wiring Diagrams Z-GI-9
Symbol ‘ Meaning Symbol Meaning
Horn l Generates sound when current flows. Switch (1) l Allows or breaks current flow by
opening and closing circuits.
Speaker
w
Heater l Generates heat when current flows. Normally open (NO)
Switch (2)
Normally closed (NC)
Harness l Unconnected intersecting harness.
Speed sensor l Movement of magnet in speedometer
set turns contact within sensor on and
Off. (Not connected)
l Connected intersecting harness.
Ignition switch @Turning ignition key operates switch
contacts to complete various circuits.
(Connected)
rlormally open (NO)
Relay (1) l Current flowing through coil produces electromagnetic force causing contact to open or close.
____- .~.~~
Open Closed
--.--.-m.---------,
Relay (2) Normally open relay (NO)
- Ri i No flow ’ ni 1 Closed
Normally closed relay (NC) Flow
ormally closed (NC)
Sensor (variable) l Resistor whose resistance changes Diode
l Known as a semiconductor rectifier.
--3p6G- with operation of other components. diode allows current flow in one
direction only
--T- IA
IY Calhode(K)+- Anode(A)
* Flow of electric current
K-1 KD, he>:
-
ensor (thermistor)
l Resistor whose resistance changes Light emitting diode 0 Diode that lights when current flows
with temperature.
(LED)
l Unlike ordinary light bulbs, diode does
not generate heat when lit
Capacitor
l Component that temporarily stores “2, Cathode(K) --&---Anode(A)
I7
Cathode(K)
electrical charge.
c Anode(A)
----il---- .
Flow of electric current
Solenoid
l Current flowing through co11 generates Reference(zener) l Allows current to flow In one dlrectlon
electromagnetic force to operate diode up to a certain voltage. allows current
plungers, etc. cd to flow In other dIrectron once that
J-
voltage IS exceeded.
z-9