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SECTION 1

how to read electrical wiring diagram



1. HOW TO READ ELECTRIC WIRING DIAGRAM

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1) contents of electrical wiring diagram (circuit)

position
explanation
a
- Upper horizontal lines : Power supply lines
- Power supply lines : 30, 15, 15A, 15C, 58
b
- Ef20 or F2 : Fuse Number
  • ef20 : fuse no #20 in engine room fuse box
  • f2 : fuse no #2 in passenger room fuse box
c
- Connector (C101~C902)
d
- S201 : Splice pack (S101~S303)
e
- Internal circuit of component (Relay)
(Component Name and Terminal Number)
f
- Internal circuit of component (switch)
(Component Name, Terminal Number and Connecting Wiring Circuit)
g
- Wiring Harness Color
h
- Lower horizontal line : Ground line



2. CIRCUIT IDENTIFICATION SYMBOL

identification
symbol
meaning
c
connector
d
diode
ef
fuse in engine room fuse box
f
fuse in passenger room fuse box
g
ground
s
splice pack(junction connector)



3. FUNCTION OF POWER SUPPLY LINE (NUMBER)

power supply no
power supply condition
15
battery voltage(b+) supply in Ignition Switch "ON" and "ST" (IGN 1)
15a
battery voltage(b+) supply in Ignition Switch "ON" (IGN 2)
15c
battery voltage(b+) supply in Ignition Switch "ON" and "ACC"
30
battery voltage(b+) supply directly regardless of Ignition Switch
31
ground connected to battery(–)
58
battery voltage(b+) supply in Head Lamp Switch 1st and 2nd step (Illumination circuit)



4. WIRING HARNESS COLOR IDENTIFICATION

abbreviation
color
abbreviation
color
br
brown
sb
sky blue
g
green
r
red
v
violet
l
blue
p
pink
y
yellow
w
white
gr
gray
or
orange
b
black
lg
light green
. .



5. HOW TO CHECK TERMINAL NUMBER OF CONNECTOR

- Terminal number is given based on Female Terminal Connector
ex) Terminal Number 4 of C901 connection

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