WI-9
Basic Diagnostic Procedure
WIRING SYSTEM
•Each connector number shown in the wiring dia-
gram corresponds to that in the wiring harness. The
location of each connector in the actual vehicle is
determined by reading the first character of the
connector (for example, a “F” for F8, “i” for i16, etc. )
and the type of wiring harness. The first character
of each connector number corresponds to the area
or system of the vehicle.
Symbol Wiring harness and cord
FFront wiring harness
BBulkhead wiring harness
EEngine wiring harness
TTransmission cord
DDoor cord LH & RH, Rear gate cord
Rear door cord LH & RH, Rear defogger cord
iInstrument panel wiring harness
R
Rear wiring harness,
Fuel tank cord,
Roof cord, Rear gate cord,
Rear defogger ground cord (Sedan model)
AB Airbag wiring harness
F23
F98F21
F58
F100F5
F27
F47
F34F19F22
F96
WI-02753
Each connector number shown in wiring diagram corresponds to that in the vehicle.
F19
FRONT TURN SIGNAL LIGHT LH (UPPER)
BG2B1
F22
FRONT TURN SIGNAL LIGHT LH (LOWER)
BG3B2
(GRAY)F3(GRAY)F19
12
WI-10
Basic Diagnostic Procedure
WIRING SYSTEM
D: SYMBOLS IN WIRING DIAGRAMS
A number of symbols are used in each wiring diagram to easily identify parts or circuits.
WI-03798
LRLWRL3725
MAIN FUSE BOX (M/B)
MB-11MB-10
F39
P-SUP-02B
P-SUP-02A
P-SUP-02C
No.3 10ANo.9 15ANo.8 15A
SBF-1 100A
HEAD-LIGHTRELAYRH
HEAD-LIGHTRELAYLH
G
P-SUP-04D
H/L(2L)-01RLLWGRLB
TO POWER SUPPLY ROUTINGMB-10M/B FUSE NO. 8MB-11M/B FUSE NO. 9FB-16F/B FUSE NO. 11(IG)MB-5HEADLIGHTRELAY
LW 4R3YLLWRYL2
YB1RY2
LW2R1YL3
P
LW B 1RA1
F44
F45
F23
F7B61
B62
B
RL2R1YL3
B71
B112
LY8RY7YBB1716
3
1716
UPLOWPA S SHFHUHLE
SMJLB H1
B36SMJ
DIODE
: WITHOUT REAR DEFOGGER: WITH REAR DEFOGGER
PA R K I N GBRAKESWITCH
R4
OFFHCTCEL
LOWHIGH
HEADLIGHT RH
HEADLIGHT LH
LIGHTING SWITCH
DIMMER & PASSINGSWITCH
LOWHIGH
B51A:B52C:F41G: (GRAY)
(BLACK)(BLACK)
FB-37
D4D7BGD11
A2WR G4BLG1BR D10
FB-35FB-34
123456712345678
LgBOr
FUSE &RELAYBOX(F/B)
i5B:B51A:
B152D:B52C:
B158E:
F41G:F40F:
FB-36
A3BGG7
No.5 10A
P-SUP-03H
P-SUP-03F
P-SUP-04KP-SUP-04J
No.1 20ANo.2 15A
SBF-6 30A
LR2R3L1R3BW 2W
SBF-2 50ASBF-3 50ASBF-4 50A
F36F38F68
P-SUP-04E
P-SUP-04MP-SUP-04L
P-SUP-03I
P-SUP-04G
12345678
F44B11212F23
123
F7
SPECIFICATIONCLASSIFICATION
SPECIFICATIONCLASSIFICATION
2
LY1313
WROR
ORWRREF. TO FOG (H4)-01
REF. TO ST (MT)-01REF. TO ST (AT)-01
REF. TO FOG (H6)-01
REF. TO GND-02
CONNECTOR-1
FUSE No. & RATING
CONNECTOR-2
CONNECTOR SKETCH
RELAY
WIRE TRACINGON EXTENDEDWIRING DIAGRAMS
Example
DIODE
GROUND
POWER SUPPLYROUTING
SMJSYMBOLS OFWIRECONNECTIONAND CROSSING
PP17R3B99
PP7R1B97
WGWGSDSD: WAGON: SEDANSDWG
WI-11
Basic Diagnostic Procedure
WIRING SYSTEM
1. RELAY
A symbol used to indicate a relay.
2. CONNECTOR 1
The sketch of the connector indicates the one-pole
types.
3. WIRING CONNECTION
Some wiring diagrams are indicated in foldouts for
convenience. Wiring destinations are indicated
where necessary by corresponding symbols.
(When two pages are needed for clear indication)
4. FUSE NO. & RATING
The “FUSE No. & RATING“ corresponds with that
used in the 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.
6. CONNECTOR SKETCH
•Each connector sketch clearly identifies the
shape and color of a connector as well as terminal
locations. Non-colored connectors are indicated in
white or natural color.
•When more than two types of connector number
are indicated in a connector sketch, it means that
the same type connectors are used.
7. GROUND
Each grounding point can be located easily by re-
ferring to the corresponding wiring harness.
8. DIODE
A symbol is used to indicate a diode.
9. WIRE TRACING ON EXTENDED WIRING
DIAGRAMS
For a wiring diagram extending over at least two
pages, a symbol (consisting of the same characters
with arrows), facilitates wire tracing from one page
to the next.
A ←→ B, B ←→ B
10.SYMBOLS OF WIRE CONNECTION AND
CROSSING
11.POWER SUPPLY CIRCUIT
A symbol is used to indicate the power supply in
each wiring diagram.
“MB-5”, “MB-6”, etc., which are used as power-
supply symbols throughout the text, correspond
with those shown in the “DC POWER SUPPLY
CIRCUIT” in the wiring diagram.
Accordingly, using the “DC POWER SUPPLY CIR-
CUIT” and wiring diagrams permits service person-
nel to understand the entire electrical arrangement
of a system.
12.CLASSIFICATION BY SPECIFICATION
When the wiring diagram differ according to vehicle
specifications, the specification difference is de-
scribed by using abbreviations.
WI-02755
Symbol
Symbol Refers to wires which arecrossed but not connected.
Refers to wires which areconnected and branchedat the dot point.
WI-12
Basic Diagnostic Procedure
WIRING SYSTEM
E: CONNECTOR SYMBOL IN WIRING HARNESS
A number of connector symbols are used in each wiring diagram to easily identify the wiring harness con-
nectors.
WI-02756
Standard type: Female
Standard type: Male
Water proof type: Female
Water proof type: Male
Pole: From 1 to 8 Pole: From 9 to 20 Pole: More than 21
Pole: From 1 to 8 Pole: From 9 to 20 Pole: More than 21
WI-14
Working Precautions
WIRING SYSTEM
2. Working Precautions
A: PRECAUTIONS WHEN WORKING
WITH THE PARTS MOUNTED ON
THE VEHICLE
1) When working under a vehicle which is jacked-
up, always be sure to use rigid rack.
2) The parking brake must always be applied dur-
ing working. Also, in automatic transmission vehi-
cles, keep the select lever set to the P (Parking)
range.
3) Be sure the workshop is properly ventilated
when running the engine. Further, be careful not to
touch the belt or fan while the engine is operating.
4) Be careful not to touch hot metal parts, especial-
ly the radiator and exhaust system immediately af-
ter the engine has been turned off.
B: PRECAUTIONS IN TROUBLE DI-
AGNOSIS AND REPAIR OF ELEC-
TRIC PARTS
1) The battery cable must be disconnected from
the battery’s (–) terminal, and the ignition switch
must be set to the OFF position, unless otherwise
required by the diagnostics.
2) Securely fasten the wiring harness with clamps
and slips so that the harness does not interfere with
the body end parts or edges and bolts or screws.
3) When installing parts, be careful not to catch
them on the wiring harness.
4) When disconnecting a connector, do not pull the
wires, but pull while holding the connector body.
5) Some connectors are provided with a lock. One
type of such a connector is disconnected by push-
ing the lock, and the other, by moving the lock up.
In either type the lock shape must be identified be-
fore attempting to disconnect the connector.
To connect, insert the connector until it snaps and
confirm that it is connected securely.
6) When checking continuity between connector
terminals, or measuring voltage across the terminal
and ground, always contact tester probe(s) on ter-
minals from the wiring connection side. If the probe
is too thick to gain access to the terminal, use “mini”
test leads.
To check water-proof connectors (which are not
measurable from the wiring side), contact test
probes on the terminal side. Be careful not to bend
or damage the terminals.
7) Sensors, relays, electrical unit, etc., are sensi-
tive to strong impacts.
Handle them with care so that they are not dropped
or mishandled.
WI-02757
WI-02758
EXAMPLE
WI-09366
WI-18
Power Supply Circuit
WIRING SYSTEM
WI-08028
P-SUP-04P-SUP-04
BL
B4B12C17
NO. 3 15ANO. 1 20ANO. 8 20A
BL
1WOr
VV
B10
V
A11C5A13B2A7B6
RL
C2
GL
F1A4
LR
B13
LR
LBW
E6E4
R
F6
LR
E2
R
C21
WG
W
C20E8E7
B69B158E:
B52C:
B159F:B152D:B228A:i5
1234 5678910 11 12 13 14 15 16 17 18 19 20
B: R168
NO. 9 20ANO. 10 7.5ANO. 27 15ANO. 28 15ANO. 29 15ANO. 17 15ANO. 16 10ANO. 15 20ANO. 14 15A
WOr
D10
WG
A9
LW
C15
FB-3FB-4FB-5FB-6FB-7FB-8FB-9FB-11FB-10
LB
E3
WL
E1C23
157628349
P-SUP-03N
P-SUP-03M
P-SUP-02E
P-SUP-02H
P-SUP-03L
P-SUP-02I
FUSE &RELAY BOX(F/B)
i5A:
R168B:
B52C:
B152D:
B158E:
B159F:
PARKINGSWITCH
24
1
B69ON
OFF
TBP
Or
C4
OPCONNECTOR
FB-14FB-13FB-12FB-15FB-16
12341234785612345678910131415
123456789101112
1234 5678910 11 12 13 14 15 16 17 18 19 20
3412 8910 1112 13 14 15 16 17 18 19 20 21 22 23 24567
B228
(BROWN)
FB-1
L
WI-19
Power Supply Circuit
WIRING SYSTEM
WI-08029
P-SUP-05P-SUP-05
WL
B11
NO. 7 15A
2YR3GY
R
G1D4
BrR
GY
E5F7
G
F8F3
NO. 20 10ANO. 23 15ANO. 24 15ANO. 30 30ANO. 31 7.5ANO.4 7.5ANO. 11 7.5ANO. 18 10ANO. 5 7.5ANO. 12 15ANO. 19 7.5ANO. 25 15ANO. 26 7.5ANO. 32 7.5ANO. 33 7.5ANO. 22 15ANO. 21 7.5ANO. 13 20ANO. 6 7.5A
A19
FB-17FB-18FB-19FB-21
A10
WL
C19
P-SUP-02G
P-SUP-02F
P-SUP-03K
P-SUP-02A
P-SUP-03J
P-SUP-02B
FUSE&RELAYBOX(F/B)
i5A:
R168B:
B52C:
B152D:
B158E:
B159F:
B373G:
L
F2
WB
OPCONNECTOR
FB-40FB-39
GB
C11D2
Br
G2
GY
H2
WG
D1
GOrGOr
A3D8
GY
D3C1
FB-41FB-42FB-43FB-44FB-45FB-46ST-1ST-2
B228
B72
IGNITION SWITCH
3+B
4
6
L
WB
1
2
ACC
ACCOFF
IG2
ST
ONST
IG1
W
G
Y
FB-20
D6
ACCESSORY RELAY 1
IG2 RELAY
FB-23FB-24FB-25FB-27FB-28FB-29FB-32FB-34FB-35FB-36FB-37FB-38
YL
B1
YG
C3
YG
A17
YR
C7
YR
F4
YB
A1
YR
D7
YR
A5B18
YW
B14
YLGY
C8A6
GB
D9C16
GLBrW
A20
GR
A8
GR
C24H1
B
B
B373B158E:G:
B52C:
B159F:B152D:B228
A:i5
1234 5678910 11 12 13 14 15 16 17 18 19 20
1576283491234785612345678910131415
123456789101112
3412 8910 1112 13 14 15 16 17 18 19 20 21 22 23 24567
12
B:R168
12345678910 11 12 13 14 15 16 17 18 19 20
B72
134562
REF. TOGND-02
(BROWN)
AB35H:
FB-48FB-49
GYGYGOr
FB-47
12
AB35H:(BLACK)
WI-20
Power Supply Circuit
WIRING SYSTEM
No. Load
MB-1 Fail safe relay
MB-2 VDC control module
MB-5 Mirror heater relay
Rear defogger
MB-6 Body integrated unit
MB-8 PWM controller
MB-9 ECM
MB-14 OP connector
Lighting switch
MB-15 Combination meter
MB-16 Headlight RH
MB-17 Headlight LH
MB-18 OP connector
Daytime running light control module
MB-19 Horn
MB-20 Horn
MB-21 Body integrated unit
MB-22 Ignition relay
Main relay
MB-23 Main relay
MB-24 Electronic throttle control relay
MB-25 Fuel pump relay
MB-26 TCM
MB-27 ECM
Data link connector
MB-28 Key warning switch
Tu r n s i g n a l & h a z a r d u n i t
Body integrated unit
MB-29 Auto A/C control module
Spot map light
Va n i t y m i r r o r i l l u m i n a t i o n l i g h t R H
Handle light LH
Handle light RH
Foot light (Driver’s seat)
Foot light (Passenger’s seat)
Home link
Body integrated unit
MB-30 Power window circuit breaker
MB-31 F/B fuse No. 16
MB-32 ALT-1
ECM
Par king light switch
MB-33 Blower fan relay
MB-34 Accessory relay 2
Va c u u m p u m p r e l ay
ALT-1 ECM
FB-1 Trailer connector
FB-3 Stop light & brake switch
Stop light switch
FB-4 Mirror heater relay
Wiper deicer relay
FB-5 Seat heater relay
FB-6 Body integrated unit
FB-8 Rear cooler relay
FB-9 Front fog light relay
FB-10 MFD
Impact sensor
Audio
Keyless entr y control module
Second-row seat foot light RH
TV monitor
Navigation module
Fr o n t s te p li gh t LH
Fr o n t s te p li gh t RH
Rear seat entertainment
Rear step light RH
FB-11 Second-row seat foot light LH
Luggage room light
Rear gate light
Rear step light LH
FB-13 Navigation module
FB-17 TPM control module
War ning box (Passenger’s side)
Combination meter
FB-18 Auto A/C control module
Body integrated unit
FB-19 Remote control mirror switch
FB-20 Accessory relay 2
Seat heater relay
Shade mirror
FB-21 Body integrated unit
Rear accessory power supply socket
FB-23 Rear wiper motor
FB-24 Body integrated unit
Rear washer motor
FB-25 MFD
Audio
TV monitor
Navigation module
Rear seat entertainment
FB-27 Front wiper switch
Fr o n t wi p er mo t or
Wiper relay unit
FB-28 Key warning switch
Key illumination
Body integrated unit
FB-29 TCM
FB-32 Open/Close switch
Sunroof control unit
Stop light & brake switch
Stop light switch
Tilt switch
Data link connector
Wiper deicer relay
FB-34 Turn signal & hazard unit
FB-35 Stop light relay
Daytime running light control module
Daytime running light relay
Back-up light relay
Rearview mirror
FB-36 MFD
War ning box (Passenger’s side)
Combination meter
No. Load