Subaru Impreza 2003, Service Manual

Page: 3315 / 3610

WI-11
WIRING SYSTEM
BASIC DIAGNOSTICS PROCEDURE
D: SYMBOLS IN WIRING DIAGRAMS
A number of symbols are used in each wiring diagram to easily identify parts or circuits.
1. RELAY
A symbol used to indicate a relay.
2. CONNECTOR-1
The sketch of the connector indicates one-pole
types.
3. WIRING CONNECTION
Some wiring diagrams are indicated in foldouts for
convenience. Wiring destinations are indicated
where necessary by corresponding symbols (as
when two pages are needed for clear indication).
4. FUSE NO. & RATING
The “FUSE No. & RATING” corresponds with that
used in fuse box (main fuse box, fuse and joint
box).
5. CONNECTOR-2
• Each connector is indicated by a symbol.
• Each terminal number is indicated in the corre-
sponding wiring diagram in an abbreviated form.
• For example, terminal number “G4” refers to No.
4 terminal of connector (G: F41) shown in the con-
nector sketch.
WI-00116
LR LW RL
3 7 2 5
MAIN FUSE BOX (M/B)
MB-11 MB-10
F39
P-SUP-02
B
P-SUP-02
A
P-SUP-02
C
No.3 10A No.9 15A No.8 15A
SBF-1 100A
HEAD-
LIGHT
RELAY
RH HEAD-
LIGHT
RELAY
LH
G
P-SUP-04
D
H/L(2L)-01
RL LW GR LB
MB-10
M/B FUSE NO. 8
MB-11
M/B FUSE NO. 9
FB-16
F/B FUSE NO. 11
(IG)
MB-5
HEADLIGHT
RELAY
TO POWER SUPPLY ROUTING
LW 4
R 3
YL
LW
R
YL 2
YB 1
RY 2
LW 2
R 1
YL 3
P
P P 17
LW B1
R A1
F44
F45
F23
F7 B61
B62
R3 B99
B
REF. TO GND-02
RL 2
R 1
YL 3
B71
B112
LY 8
RY 7
YB
B
LY
17
16
13
DIMMER & PASSING
SWITCH
UP LOW PASS
HF
HU
HL
E
SMJ
LB
H1
B36
SMJ
DIODE
R4
PARKING BRAKE
SWITCH
LIGHTING SWITCH
OFF
HC
TC
EL
HEADLIGHT LH
LOW
HIGH
HEADLIGHT RH
LOW
HIGH
REF. TO FOG(H4)-01
REF. TO FOG(H6)-01
REF. TO ST(MT)-01
REF. TO ST(AT)-01
B51 A: B52 C: F41 G:
FB-37
D4
D7
BG
D11
A2
WR
G4
BL
G1
BR
D10
FB-35 FB-34
1 2 3
4 5 6 7
1 2 3
4 5 6 7 8
LgB
Or
FUSE &
RELAY
BOX (F/B)
i5
B:
B51 A:
B152 D:
B52 C:
B158 E:
F41 G:
F40 F:
FB-36
A3
BG
G7
No.5 10A
(GRAY)
P-SUP-03
H
P-SUP-03
F
P-SUP-04
K
P-SUP-04
J
No.1 20A No.2 15A
SBF-6 30A
LR
2
R
3
L
1
R
3
BW
2
W
SBF-2 50A SBF-3 50A SBF-4 50A
F36 F38 F68
P-SUP-04
E
P-SUP-04
M
P-SUP-04
L
P-SUP-03
I
P-SUP-04
G
1 2 3 4
5 6 7 8
F44 B112
1 2 F23
1
2
3
(BLACK)
F7 (BLACK)
RELAY
DIODE
GROUND
CONNECTOR-1
CONNECTOR-2
CONNECTOR
SKETCH
FUSE No. & RATING
POWER SUPPLY
ROUTING
SMJ
WIRE TRACING
ON EXTENDED
WIRING DIAGRAMS
SYMBOLS OF
WIRE
CONNECTION
AND CROSSING
Example