2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
To Tachometer
[Com
b. Meter]<
27–3>
3 421
2
12
1
1
23
2
1
5
To Engine Control Module<4–7><30–7><30–8>
D
To Bulb Check R
elay[C
omb. M
eter]<
27–6><
28–4>
B–W
1 TOYOTA TACOMA ELECTRICAL WIRING DIAGRAM
A
223E
(A/T)
2
(M/T)
2
ACC
IG1
ST1
IG2
(*1)
AM1
G
1
67 AM2
W–R
2 2
W
B
2 2
G
3E20
3E6
4 EA1
21 IF18 IK3
W
2 2
3E21
3E103E7
G B–Y
G
W–R
9
6
2
2
3E5
3E8
21 IK2
IE
3A16
2
1
1 A1
B
EB
1
1
1
3A20
10 2
1
3 7 6 5 4 8
1 IK2
17 IF1
9
Y–GR
G
G
Y–GR
W
G
G
B–R
B
W–B
Y–GR
B
G
(*1 )
(A/T )
(A/T)(M
/T )
I14IGNITION SW
STARTERRELAY
G
C 8CLUTCH STARTCANCEL SW
P
N
P 1PA
RK
/NE
UTR
AL
POSITIO
N S
W
40A AM
1
30A A
M2
120A ALT
Y–G
R
W
B–W
G
G
2
W–B
B
(*1 )
BATTERY
Around the rightedge of thereinforcement
BR
B–L
LG–R
B–W
B–Y
LG–B
W–B
GR
G–Y
G
W–B
B–R
Near the throttle body
I 2IGNITER
W–B
B–R
B–RB–R
B–R
Around theleft edgeof thereinforcement
B–R
IG
B–RB–R
B–R
I 3IGN
ITION
CO
IL NO
. 1
I 4IGN
ITION
CO
IL NO
. 2
I 5IGN
ITION
CO
IL NO
. 3
E
P ow er S ource S ta rting (5V Z– FE ) Ign ition (5V Z–F E )
(*1 )
(A/T )
To EngineControlModule<30–5>
Y–GR
(A/T)
(* 1)
(*1 )
(M/T )
EA Front leftfender
W–B
W
W(*1 )
53
B–R
1I2
B–R
B–Y
3D19
1F5
B–Y4
3D15
1 7
10AGAUGE
JUN
CTIO
N C
ON
NE
CTO
R
BA
J 9J10
,
S 1 S 2,
STARTER
A B
C 9
CLU
TCH
STA
RT S
W(*1)
(* 1)
To Engine Control M
odule<
4–8><
30–8>
1I3
1F6
7. 5ASTA
(*1 )* 1 : Except 2WD M/T
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
B–R
3 421
2
12
1
1
1
23
22
1
5
2 TOYOTA TACOMA
GENERATOR
2
ACC
IG1
ST1
IG2
AM1
W
4
1
67 AM2
2 2
W–R
2 2
W
W
2 2
1I2
3E8
4 EA1
21 IF1
1E5
Front leftfender
EA
B–W
2 2
Around the leftedge of thereinforcement
IG
3E53E10
G
W–B
STARTERRELAY
2
21 IK2
3A16
C 9
CLU
TCH
START S
W2
1
1 A1
B
20 3A
2 EA1 1 EA1 3 EA1
5 IF1
1C7 1K5
1C6
L
IG
B
B1
B2
A1
S
B3
C
(*3 )
(*4 )
(*3 )
Y
C
(*4 )
(*3 )
1I4
1F10
10
13
G
W
B–Y
B–R
B–R
W
W
Y–GR
I14IGNITION SW
B
P
N
40A AM
1
30A A
M2
7. 5A ALT–S
120A ALT
W
B–W
G
WW
B
BATTERY
W R Y
YYY
R
Y
R
To Daytim
e Running Light
Relay (M
ain )<8–4>
B–W
IE
J 9JU
NC
TION
CO
NN
ECTO
R
C13
CH
AR
GE
WAR
NIN
G LIG
HT
[CO
MB. M
ETER]
7. 5AIGN
Y–G
R
10AGAUGE
P ow er S ource S tarting (3R Z–F E, 2R Z–F E) Charg ing
6 3E
3E21
7
3E20
3E
3E22
8 IK3
G
W–B
W–B
W
GG
E B
D A
B–Y
Y–GR
B–Y
B
G
W G
W
G(A/T )
G(M
/T )
G
W–B
W–B
W–B
To Bulb Check R
elay[C
omb. M
eter]<
27–6><
28–4>
To Engine Control
Module<
5–8><
6–8>
(M/T )
(M/T )
(M/T )(A
/T )
(A/T )
(A/T )
(M/T)
Around the rightedge of thereinforcement
(M/T )
(M/T )
(M/T )
* 1 : 3RZ–FE A/T* 2 : 2RZ–FE A/T* 3 : w/ Daytime Running Light
C 8CLUTCH STARTCANCEL SW
53
1 7
Y–G
R
(M/T )
3D19
1F5
3D15
B–R
B–R
B–Y
R
JUN
CTIO
N C
ON
NE
CTO
R
BA
J 9J10
, S 1 S 2,
STARTER
A B
, G 2G 1 A B
To Engine C
ontrolM
odule<5–7>
<6–7>
Y–G
R(A/T )
(M/T )
(M/T )
6 A (*1)
5 B (*2)
6 B (*2)
9 A (*1)
P 1A
, B
PAR
K/NE
UTR
AL
POSITIO
N S
W
1I3
1F6
7. 5ASTA
* 4 : w/o Daytime Running Light
(M/T )
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
3 TOYOTA TACOMA
2
Pow er Source Ign ition (3RZ –FE , 2RZ –FE )
W
BATTER
Y
2
1
EB Under the data linkconnector 1
N 1
NO
ISE
FILTER
(Ignition System
)
I20IG
NITIO
N C
OIL AN
DIG
NITER
NO
. 1
I21IG
NITIO
N C
OIL AN
DIG
NITER
NO
. 2
I22IG
NITIO
N C
OIL AN
DIG
NITER
NO
. 3
I23IG
NITIO
N C
OIL AN
DIG
NITER
NO
. 4
To Engine Control M
odule<
5–6><
5–7><
6–6><
6–7>
4 2 4 2 4 2 4 2
1 3 1 3 1 3 1 3
B–R
B–R
B–R
B–R
B–R
BR BR
B–Y
BR
B–Y
BR
B–Y
BR
B–Y
B–R
B–L L L–R
L–Y
B–Y
BR
B–R
B–R
B–R B–R
BR BR
BR
B–Y B–Y
17 IF1
1 IK2
2
2
1
30A AM
2
W–R
7 IG2 6AM2
I14IGNITION SW
EF Ignition coilbraket
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
(Cont. next page)
P ow er S ource
4 TOYOTA TACOMA
R
W–R
B–Y
E ngine C ontro l (5V Z–F E 2W D M /T )
2
ACC
IG1
ST1
IG2
AM1
B–R
4
67 AM2
1
2
3
5
1I42 2
7. 5A OB
D
1F11I14IGNITION SW 2
20A E
FI
2
120A ALT
2 2
7. 5AIGN
2
EFI R
ELAY
2
30A A
M2
2
40A AM
1 17 IF1
1 IK2
1
2
1
2
1
2
1
2
1
2
1
2
EA IG
SG
Q
IF115
3E11F5
1I2
IK2
3 BN7
EB
V–R
SIL
W–R
WV
B–Y
B–Y
B–R
B–R
W–B
B–R
W
B–R
B–Y
V
B–Y
B–Y
B–W
W–R
B–R B–R B–R
W–R
B
I11IN
JECTO
R N
O. 6
RL–R
W–L
LB
–R
B–R
B–R
B–R
B–R
B–R
W–B
W–B
W–B
B–Y
W–R
W–R
B–Y
W–B W–R
VV
B–R
BR
W–B
B–W 4 5 7
3 2
5 1
16
W
W–L
W–R
B
R
Around therightedge of thereinforcement
L–R
W–L
IE
L
BR
BR
I10IN
JECTO
R N
O. 5
I 9INJEC
TOR
NO
. 4
I 8INJEC
TOR
NO
. 3
I 7INJEC
TOR
NO
. 2
I 6INJE
CTO
R N
O. 1
Around the leftedge of thereinforcement
BATTERY
Front left fender
10AGAUGE
C 6
CIR
CU
IT OP
ENIN
GR
ELAY
Near thethrottle body
B–Y
1
22
2 1
2
121
1
N
C
M
E
F
L
G
H
J
K
O
P
BAT
CG
D B
E A
B–R C
10M
ALFU
NC
TION
IND
ICATO
R LA
MP
[CO
MB
. ME
TER
]
J 9 J10,
JUNCTIONCONNECTOR
A B
SW–R
BW–R
DB–O
B–O
B–O
B–W
W
3E4
7 IF1
3D19
3D20
3A15
3A165 BN7
5
4
M
13 BN7F 8FU
EL PU
MP
LL
W–R
L
W–L
W–R
W–R
W–R
W–R
W–R
WFrom
Center A
irbagSensor A
ssembly
<17–2>
V–R
WW–B
3E2
3E3
13 IK2
W–R
W–R
W–R
9
5
B–W
B–W 12 IF1
TS
From A
BS A
ctuatorw
ith EC
U<
16–4>R
–Y
14
WFSE
15
Y–R
B
BB
J11JUNCTIONCONNECTOR
AB–W
Y–RI
23
W–B
W–B
W–R
Y–B
W–R
W–RA/B
6
From C
enter Airbag
Sensor Assem
bly<
17–3>
Y
D 7DATA LINKCONNECTOR 3
C
C C C
J11JUNCTIONCONNECTOR13
TC
Y–B
Y–B
Y–B
Y–B
From AB
SA
ctuator with
EC
U<
16–4>
From C
enterAirbag S
ensorAssem
bly<
17–3>
From C
ruiseC
ontrolEC
U<
15–3>
Y–B
W–R
Y–B
WFrom
AB
SE
CU
<16–4>
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
G
7 865
#30
Q
BR
BR
2
(Shielded )
(Shielded )
M
V 4
VS
V (EVAP
)
N
O
J
P
2
1
1 EE1 2
1
ENGINE CONTROL MODULE
2
7 C 1 A 16 A 10 D 12 D 13 D
W–R
11 D 18 D 17 A 15 D 25 D 20 C 2 C 11 C 10 C
13 A A2 22 A 6 C 5 C 4 C 3 C 1 C C8 16 C 24 C 14 D 19 C
D24
3
2
1
9 C 9 A 3 A 7 A 20 A 12 C 21 C 13 C
1 ED1 3 ED1 2 ED1
EB
29 D 27 D 23 D 22 D 6 A 17 C 4 D 5 D D7
1
Y–B
W–R
B–Y
B–W G Y–G
L–B
G–R
BR–B
L–B
L–B
LG–R
Y
G–Y
W–G
L–BW–R
W–R
B–Y
L–B W–R
2 3 4
1 5
V–R
W–L
W–R
B R L–R
W–L
L
L–B
B–R
#40 #50 #60
W–R
RSO RSC
W–R
AF1+
W–R
HAF1
W–R
HT2B
Y–R
OX2B KNK1
W–L
KNK2
W–R
B
SP1
R
E1
L–R
E01
W–L
E02
L
T 1THROTTLEPOSITIONSENSOR
W–R
BR
4
42
3 1
1
3
B–Y
B–L
LG–R
B–W
L–Y
L–B G
G–W
L G
G R
1 2 2 1
G
1
E ngine C on tro l (5V Z–FE 2W D M /T )
1
3 2
V 8VA
PO
RPR
ESS
UR
E SE
NSO
R
G–Y
B GR
G–Y
R
R–W
R–Y
P–L
V
B GR
G–B
G–O
W–R
W–B
W–B
W–R
W–B
BR
L
BR
W–B
W–B
BRL–B
BR
M 1
MA
SS A
IR FLO
W M
ETER
To Cruise C
ontrolE
CU
<15–3>
L–B
G–R
V12
VS
V (Pressure Sw
itchingV
alve )
TC +B BATT E2G VG THA E2 THW IDLO VTA VC TBP
I 1IDLE A
IR C
ON
TRO
L VA
LVE
A23
AIR
FUEL R
ATIO S
EN
SO
R(Bank 1 S
ensor 1 )
EVP
BR
EE12
BR
PTNK
14 C
From Igniter<1–4>
From A/CControlAssembly<29–6>
R
From C
lutch Start S
W<
1–2>
From S
top Light SW
<15–4>
C 2CRANKSHAFTPOSITIONSENSOR
C 1CAMSHAFTPOSITION SENSOR
K
E1
IGF IGT1 IGT2 IGT3 AC1 ACT STA STP NE+ NE– G2
(Shielded )
(Shielded )
(Shielded )
I
(Shielded )
(Shielded )
(Shielded )K 2KN
OC
K SE
NSO
R 1
K 3KN
OC
K SE
NSO
R 2
Near thethrottle body
F
C
W–R
4 TOYOTA TACOMA (Cont’ d)
WFSE E03W FC #10 #20
To Speedom
eter[C
omb. M
eter]<
27–2>
BR
E 3EN
GIN
E CO
OLA
NT
TEM
P. SEN
SOR
3 2
1
18 C
PSW
1
B
P10
PO
WE
R S
TEE
RIN
GO
IL PR
ESS
UR
E SW
, E 6E 5 A B , E 7 C , E 8 D
BR
BR
BR
BR
Y–B
B
D
23 IF1
4 A 15 A
W–R
B–O
MREL
26 D
AF1–
P
P
8 D
E04
W–B
BR
5 IK2
S
26 BN7
G–B
W–G
R–Y
W–R
B–O
B–O B–W
IGSW
14 IK2
(Shielded)
(Shielded )
V
(Shielded )
W–B
W–B
V
AB–W
BN725
L–B
IK68 IK61
23 BN724 BN7
R–Y
G–Y
14 A 21 D
W
2
V11VS
V(C
anisterC
losed Valve )
12 IK2 22 IK2
(Shielded )
R
H 9
HEA
TED
OX
YGE
N S
EN
SO
R(B
ank 1 Sensor 2 )
WH
IK62
G–B
1
R–W
SIL CCV
IK225
W–R
L–B
18 IK2
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
(Cont. next page)5 TOYOTA TACOMA
20A EFI
7. 5A OB
D
40A A
M1
30A AM
2
120A A
LT
2 22
B–R2
B–R
2
2
ACC
IG1
ST1
IG2
AM1 4
6
W
7 AM2
3 BN7
IK21
1I4
1F11
1
2
1
2
1
2
1
2
2
1
3
5
2
B–Y
2
B–Y
W
2
V
2
W–R
W–R
L
V
W–L
5
13 IK2
EAFront left fender
A
C
D
E
L
K
J
I
H
G
4
W–R
7 IF1
M
1I2
3D19
1F5
12 IF1
W–R
W–R
W–R
2 2 1 2
2
1
1 1 2 1
B–R
B–R
B–R
R–L
B–R
B–Y
R W–R
B–RB–R
B–R B–R
W–R
B–Y
V
B–Y
B–Y
BATTERY
EFI RELA
Y
I 9INJE
CTO
R N
O. 4
I 8INJE
CTO
R N
O. 3
I 7INJE
CTO
R N
O. 2
I 6INJE
CTO
R N
O. 1
I14IGNITION SW
W–R
B–R
R–Y
From A
BS A
ctuatorw
ith EC
U<
16–4>
EF Ignition coilbraket
16 7
4 13
W–B
BR
BR
Y–B
W–B
W
V
B–Y
W–R
B–Y
W–R
W–R
W
V–R
W–L
W–R
W
R
R–L
D 7
DA
TA LIN
KC
ON
NEC
TOR
3
BAT SIL
TCCG
P ower S ource E ng ine C on trol (3R Z– FE )
W–B
IG
W–B
D B
E A
10AGAUGE
B
B
, J10
J 9A
B
JUN
CTIO
N C
ON
NEC
TOR
C10
MALFU
NC
TION
IND
ICA
TOR
LAMP
[CO
MB
. METER
]
W–RN
W–RM
6
From C
enterA
irbag Sensor
Assem
bly<17–3>
From C
ruiseC
ontrolEC
U<
15–3>
A/B
Y–B
Y
W–R
F
B–R
W–B
W–B
W–B
13 BN7
W–B
3D20
5
9
B–R
7. 5A IG
N
B–O
B–O
23 IF1
B–O
3E1 3E2
3E4 3E3
W–R
W–R
W–R
B–O
153A
163A
W–B
L5 BN7
IE Around theright edgeof thereinforcement
Around theleft edgeof thereinforcement
3
5
2
1
23 IK2
5
BR
SG
9
From C
ombination
Meter<
27–3>
TAC
LG–B
F 8FU
EL PU
MP
W
B–O
B–O
W–R
W–RB
From CenterAirbag SensorAssembly<17–2>
14
TS
C
C
W–R
C 6
CIR
CU
IT OP
EN
ING
RE
LAY
B W
W J11JUNCTIONCONNECTOR
J11JUNCTIONCONNECTOR
C
C
Y–B
Y–B
Y–B
From AB
SActuatorw
ith EC
U<
16–4>
From C
enterAirbag SensorAssem
bly<17–3>
C
Y–B
From ABS Actuatorwith ECU<16–4>
W
W
17 IF1
B–R
W–B
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
E
7 865
4
BR
4
(*2 )
(*2 )
L
V 4VS
V(E
VAP
)
D28
2
1
From ”
STA
” Fuse
<2–3>
22
1
ENGINE CONTROL MODULE
2
12 A 22 C 14 C 21 C 18 C 12 C 5 B9 C 2 C7 C
H
GV–R
3 D 4 D B28
R–W
15 D 5 C 11 C 20 C
C AB
2
11
2
31
B
13 A 14 A 7 A 15 A 16 C 24 C 15 C
EF
10 C 3 C 21 A 17 C 21 D 5 D
AFHT
D
W
NSW
B–W
GR
Y–G
L–B
G–R
L–B
L–B
A
Y
G–Y
W–R
L–B
W–R
W–R
6
W–R
L–B L–B
W–R
4 5 2
3 1
3
B–R
R–B
W–R
RSD
W–R
EGR
W–R
AF+
W–R
AF– OXS HTS
W–R
W
R
SP1
R–L
E1 E01 E02
19
W–R
31
W–R
2
42
1 3
1
L–Y
L–B
LG–R
G
G–W
L G
G R
1 2 2 1
3
+B
16
E ngine C on tro l (3RZ –FE )
L–B
L–BP
–L
2
E 1EG
R G
AS TE
MP. SE
NSO
R
THG
G–Y
G–Y
R–WB
R–Y
V
W
W–G
G–B
G–O
W–R
W–B
W–B
W–R
W–B
BR
K BR
BR
W–B
W–B
L–B
BR
M 1
MAS
S AIR
FLOW
ME
TER
E 3
EN
GIN
E C
OO
LANT TEM
P. S
ENS
OR
To Cruise
Control E
CU
<15–3>
BATT
L–B
8
V12
VSV
(Pressure Sw
itchingV
alve )
A
SIL EVG VG THA E2 THW IDLOVTA VCTBP
I 1IDLE A
IR C
ON
TRO
L VA
LVE
V 3
VS
V (EGR
)
A23
AIR
FUEL R
ATIO S
EN
SO
R(Bank 1 S
ensor 1 )
H 9
HE
ATED O
XY
GE
N SE
NSO
R(Bank 1 S
ensor 2 )
EVP
BR
PTNK
From A/CControlAssembly<29–6>
19
From C
lutch Start S
W(M
/T )or P
ark/Neutral Position
SW
(A/T )<
2–2>
From S
top Light SW<
15–4>
C 2CRANKSHAFTPOSITION SENSOR
C 1CAMSHAFTPOSITIONSENSOR1
C
J
C
1
I
W–L
AC1 ACT STA STP NE+ NE– G2+
(*2 )
(*2 )
Ignition coilbraket
D
B
W–R
5 TOYOTA TACOMA (Cont’ d)
#30 E03#40
To Speedom
eter[C
omb. M
eter]<
27–2><
28–2>
W
22
Y–GR
(A/T )
1
B–Y
2 D
#20
1 D
#10
6 A
W
7 B
TC
A
L4
GR
To Detection SW
(TransferL4 P
osition )<21–4>
10 B
4WD
G–B
To AD
D D
etection SW[A
DD
Actuator]<
21–1>
BR
(*2 )
W–RN
W–R
Y–BF
13 B
TAC
LG–B
To Tachometer
[Com
b. Meter]
<27–3>
15 IF1
BR
R–L
RWW–R
V–R
MW–R
1
B–Y
(*1 A/T )
(*1 )
* 2 : Shielded
3
1
V 8VA
PO
R PR
ESS
UR
E SE
NSO
R
3 2
1
, E 6E 5 A B , E 7 C , E 8 D
BR
C
20 A
ELS
G
G–R
From ”
TAIL”
Fuse<
9–3>
BR
6 B
FC
W–L
KNK
BB
P
1 C
R–L
EFIgnition coilbraket
BR
W–B
BR
22 IK2 12 IK2
BR
BR
5 IK2
* 1 : 4WD
12 D D13
L L–R
IGT2 IGT3
14 DL–Y
IGT4
10 D
B–Y
IGF
From Ignition C
oil andIgniter N
o. 1<3–2>
From Ignition C
oil andIgniter N
o. 2<3–2>
From Ignition C
oil andIgniter N
o. 3<3–3>
From Ignition C
oil andIgniter N
o. 4<3–3>
11
From Ignition C
oil and IgniterN
o. 1, No. 2, N
o. 3 and No. 4<
3–3>
D
B–L
IGT1
Y
PSW
P10
PO
WE
R STEE
RIN
G O
ILP
RES
SU
RE
SW
W–R
W–B
VV
14 IK2
K 1KNOCKSENSOR
(*2 )
B–YA
6 D
W–B
E04
2
1
V11VS
V(C
anister Closed V
alve )W–R
26 BN7
2 IK6
G–B
G–B
23 BN7
25 BN7
T 1TH
RO
TTLE PO
SITIO
N S
ENS
OR
R–Y
L–B
24 BN7
8 IK6
G–Y
G–Y
IK225
W–R
CCV
19 IK2
Y
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
(Cont. next page)6 TOYOTA TACOMA
20A EFI
7. 5A OB
D
40A A
M1
30A AM
2
120A A
LT
2 22 B–R
2
B–R
2
2
ACC
IG1
ST1
IG2
AM1 4
6
W
7 AM2
17 IF1
IK21
1I4
1F11
1
2
1
2
1
2
1
2
2
1
3
5
2
B–Y
2
B–Y
W
2
V
2
W–R
W–R
L
V
W–L
5
13 IK2
EAFront left fender
B
C
D
E
L
K
J
I
H
G
4
W–R
7 IF1
M
1I2
3D19
1F5
12 IF1
W–R
W–R
2 2 1 2
2
1
1 1 2 1
B–R
B–R
B–R
R–L
B–R
B–Y
R
W
W–R
B–RB–R
B–R B–R
W–R
B–Y
V
B–Y
B–Y
BATTERY
EFI RELA
Y
I 9INJE
CTO
R N
O. 4
I 8INJE
CTO
R N
O. 3
I 7INJE
CTO
R N
O. 2
I 6INJE
CTO
R N
O. 1
I14IGNITION SW
B–R
B–R
EF Ignition coilbraket
16 7
4 13
W–B
W–B
BRB
R
Y–B
W–B
W
V
B–Y
W–R
W–R
W–R
W–R
W
V–R
W–L
W–R
W
R
R–L
D 7
DATA LIN
KC
ON
NE
CTO
R 3
BAT SIL
TCCG
P ower S ource E ng ine C on trol (2R Z– FE )
W–B
IG
W–B
D B
E A
10AGAUGE
B
J11JUNCTIONCONNECTOR
B
B
, J10
J 9A
B
JUN
CTIO
N C
ON
NE
CTO
R
C10
MA
LFUN
CTIO
NIN
DIC
ATOR
LAM
P[C
OM
B. M
ETE
R]
W–RN
W–RM
6
From C
enterA
irbag SensorA
ssembly<
17–3>
From C
ruiseC
ontrolE
CU
<15–3>
A/B
Y–B
Y
Y–B
W–R
F
B–R
W–B
W–B
W–B
W–B
13 BN7
W–B
3D20
5
9
B–R
7. 5A IG
N
B–O
B–O
23 IF1
B–O
3E1 3E2
3E4 3E3
W–R W–RW
–R
153A
163A
W–B
L5 BN7
IE Around theright edgeof thereinforcement
Around theleft edgeof thereinforcement
3
5
2
1
C 6CIRCUITOPENINGRELAY
23 IK2
5
BR
SG
9
From C
ombination
Meter<
27–3>
TAC
LG–B
W–B
F 8FU
EL PU
MP
B–O
B–O
3 BN7
W–R
W–R
AB–Y
R–Y
From A
BS A
ctuatorw
ith ECU
<16–4>
14
TS
C
CC
C
Y–B
WFrom
Center A
irbagSensor A
ssembly<
17–2>
J11JU
NC
TION
CO
NN
EC
TOR
W–R
Y–B
Y–B
From ABSActuatorwith ECU<16–4>
From CenterAirbag SensorAssembly<17–3>
W–R
Y–BC
From A
BS
Actuator
with EC
U<
16–4>
W
W
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
E
7 865
4
BR
4
(*1 )
(*1 )
L
V 4VS
V(E
VAP
)
D28
2
1
From ”
STA
” Fuse
<2–3>2
1
ENGINE CONTROL MODULE
2
12 A 22 C 14 C 21 C 18 C 12 C 5 B9 C 2 C7 C
H
GV–R
3 D 4 D B28
R–W
15 D 11 C 20 C
C AB
1
2
31
B
13 A 14 A 7 A 15 A 16 C 24 C 15 C
EF
10 C 3 C 21 A 17 C 21 D 5 D
AFHT
D
W
NSW
B–W
GR
Y–G
L–B
G–R
L–B
L–B
A
Y G–Y
W–R
L–B
W–R
W–R
6
B–Y
L–B L–B
W–R
4 5 2
3 1
3
B–R
W–R
RSD
W–R
AF+
W–R
AF– OXS HTS
W–R
W
R
SP1
R–L
E1 E01 E02
31
W–R
2
42
1 3
1
L–Y
L–B
LG–R
G
G–W
L G
G R
1 2 2 1
3
+B
16
E ngine C on tro l (2RZ –FE )
2
G–Y
R–WB
V
W
W–G
G–B
G–O
W–R
W–B
W–B
W–R
W–B
BR
K
BR
BR
W–B
W–B
L–B
BR
M 1
MAS
S AIR
FLOW
ME
TER
E 3EN
GIN
E C
OO
LAN
T TEM
P. SEN
SOR
To Cruise
Control E
CU
<15–3>
BATT
L–B
8
V12
VSV
(Pressure
Sw
itching Valve )
A
SIL EVG VG THA E2 THW IDLOVTA VCTBP
I 1IDLE A
IR C
ON
TRO
L VA
LVE
A23
AIR
FUEL R
ATIO S
EN
SO
R(Bank 1 S
ensor 1 )
H 9
HE
ATED O
XY
GE
N SE
NSO
R(Bank 1 S
ensor 2 )
EVP
BR
PTNK
From A/CControlAssembly<29–6>
From C
lutch Start S
W(M
/T )or P
ark/Neutral Position
SW
(A/T )<
2–2>
From S
top Light SW<
15–4>
C 2CRANKSHAFTPOSITION SENSOR
C 1CAMSHAFTPOSITIONSENSOR
J
C
1
I
W–L
AC1 ACT STA STP NE+ NE– G2+
(*1 )
(*1 )
Ignition coilbraket
D
A
W–R
6 TOYOTA TACOMA (Cont’ d)
#30 E03#40
To Speedom
eter[C
omb. M
eter]<
27–2><
28–2>
W
22
Y–GR
(A/T )
1
B–Y
2 D
#20
1 D
#10
6 A
W
7 B
TC
BR
(*1 )
W–RN
W–R
Y–BF
13 B
TAC
LG–B
To Tachometer
[Com
b. Meter]
<27–3>
15 IF1
BR
R–L
RWW–R
V–R
M
W–R
1
B–Y
* 1 : Shielded
3
T 1TH
RO
TTLE PO
SITION
SE
NS
OR
1
V 8
VA
POR
PR
ESS
UR
E SEN
SO
R
3 2
1
, E 6E 5 A B , E 7 C , E 8 D
BR
C
20 A
ELS
G
G–R
From ”
TAIL”
Fuse<
9–3>
BR
6 B
FC
W–L
KNK
BB
P
6 D
W–B
E04
EFIgnition coilbraket
BR
W–B
BR
22 IK2 12 IK2
BR
BR
5 IK2
12 D D13
L L–R
IGT2 IGT3
14 DL–Y
IGT4
10 D
B–Y
IGF
From Ignition C
oil andIgniter N
o. 1<3–2>
From Ignition C
oil andIgniter N
o. 2<3–2>
From Ignition C
oil andIgniter N
o. 3<3–3>
From Ignition C
oil andIgniter N
o. 4<3–3>
11
From Ignition C
oil and IgniterN
o. 1, No. 2, N
o. 3 and No. 4<
3–3>
D
B–L
IGT1
Y
PSSW
P10
PO
WE
R STEE
RIN
G O
ILP
RES
SU
RE
SW
W–R
W–B
VV
14 IK2
K 1KNOCKSENSOR
(*1 )
C1
R–L
W–R
2
1
V11VS
V(C
anister Closed V
alve )
W–RB
25 BN7
8 IK6
25 IK2
23 BN724 BN7
G–Y
R–Y
R–Y
G–Y
G–Y
L–B
2 IK6
26 BN7
G–B
G–B
W–R
(*1)
CCV
19 IK2
Y
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
2
7 TOYOTA TACOMA
H
2
EL HL
2
HF
2
HU
31J
4 1K
HEAD
TAIL
LOW
OFF
4 1J
11 IF12
T
A A
1
9
177813
1 2
3
2 1
3
2
3A17 3F20
3F163A16
IG
1
HIGH
4
P ow er S ource H ead light (w /o D aytime R unning L igh t)
2
HEA
D R
ELAY
H 1
HEA
DLIG
HT LH
H 2
HE
ADLIG
HT R
H
B–Y
R–Y
R–G
R–Y
R–W
R–L
LG
R–Y
R–G
R–G
R–Y
LIGH
TC
ON
TRO
LSW
FLASH
DIM
ME
R S
W
W–B
Around the right edgeof the reinforcement
IE
W
W–B
W–B
W–B
W–B
W–B
16
BATTER
Y
C12
HIG
H B
EAM
IND
ICATO
RLIG
HT[C
OM
B. METER
]
Around the left edgeof the reinforcement
C14COMBINATION SW
1
32
31
R–G
BC
AB
B
AA
B
ABJUN
CTIO
NC
ON
NE
CTO
R
BA
J 9J10
,
10A HE
AD (R
H)
10A H
EA
D (LH
)
51K
61C
71C
1L13
1L14
R–W
R–W
R–W
R–G
R–W
R–L
R–W
R–L
BODYECU
R–W
W–B
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
B
1
3 421
W–G
7
W–B163F
B
2
8
B–Y
2
11
7. 5AECU–B
3
1K
3
24
12
13
B–R
B
21
See C
ombination
Meter S
ystem<
27–6><
28–4>
20
2
3F
HE
AD
RE
LAY
2
1
8 TOYOTA TACOMA
2
ACC
IG1
ST1
AM1
9
3
2
FLASH
2
9
2
B
8
L–R
2
W 2
3A17
16 3A
12
2
6 4
L
D 8DAYTIME RUNNING LIGHT RELAY(Main)
5
B–R
V–Y
1B
2
2
B–Y
V–Y
2
B–Y
G–W
C
B–Y
W–G
W–G
W–B
BATTERY
1
2
W–B
B
2 IF1
W–B
EL
4
HU
G–Y
IE
C14COMBINATIONSW
W–B
W–B
TH
DIM
ME
R SW
Y
LIGH
TC
ON
TRO
L SW
R–W
OFF
G–Y
TAIL
G–YHEAD V
LOW
11
HIGH
10
G–Y
7
16
Pow er S ource
1
2
B–Y2
2
R–W
B–R
3
2
R
H eadligh t (w / D aytime R unning L igh t)
D13
DIO
DE
(Daytim
e Running
Light System
)
2
13
HF
2
A
R–W
2
3
B–Y
R–G
From G
enerator<
2–4>
11 IF1
B–Y
4
IF16
R–W
I14IGNITION SW
W–B
V
3
4
1
2
A
A
W–B
W–B
G–W
A
2
L–R
2
1
1I2
W–G
L–R
W–G
120A A
LT
IG
W
D 9
DA
YTIME
RU
NN
ING
LIGH
T RELA
Y NO
. 4
J 1JUNCTIONCONNECTOR
40A AM
1
R–W
1
10A H
EA
D (H
I LH)
HL
10A H
EA
D (LO
LH)
10A HE
AD (H
I RH
)
C12HIGH BEAM INDICATOR LIGHT[COMB. METER]
10A HE
AD (LO
RH
)
10A GA
UG
E
7. 5ADRL
Around the leftedge of thereinforcement
Around the rightedge of thereinforcement
1F5
3D12
3D19
B–R
, J10J 9 A B
JUNCTIONCONNECTOR
L
W–G
W–R
L
B–Y
W–R
W–G
G–W
4
1
1 3 2
DIM
MER
RELAY
2
50A J/B
1
2
1E4
1B7
51B
1
W–G
W–B
IE Around the rightedge of thereinforcement
2
W–B
1L14
1L13
BOD
Y E
CU
R–G
G–Y
H 2
HE
ADLIG
HT
RH
H 1
HE
ADLIG
HT
LH
B–Y G
E IND DRL
HI H +B H–LP DIM CHG– BRK PKB IG
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
10
* 1 : w/ Daytime Running Light
3 421
15
16
C13
ME
TER
ILLUM
INA
TION
[CO
MB. M
ETE
R]
19(A
/T )3H
9 TOYOTA TACOMA
* 2 : w/o Daytime Running Light
3A16
5
1
1
3 2
TAIL
HEAD
HT
Around the rightedge of thereinforcement
2
16C14LIGHT CONTROLSW[COMB. SW]
2
OFF
2
BATTER
Y
2
Front leftfender
2
1
2
1
2
1
2
1
7 BN7
14 IF1
21 BN7
1
14
2 2
2
3 6
G G G G
G
G
W–B
W–B
W–B
W–B
W–B
V–R
R
G
IEEA
2
9 3H
W–B
W–B
W
W–B
W–B
W–B
3C16 3C11
3A1 3A2 3A5 3I15 3I17 3I18 3I12
3C21 3C13 3C14 3C17
3
4
3
2
16
15
1
4
9
4
1
2
2
1
5 B
W–G
IG
123A
1
2
W–BW–B
W–B
W–G
W–G
W–G
W–G
W–B W–B
2
3 1
3
P 2
PAR
KIN
G LIG
HT LH
P 3
PAR
KIN
G LIG
HT R
H
R 6
TAILLIGH
T LH[R
EA
R C
OM
B. LIG
HT LH
]
R 7
TAILLIGH
T RH
[RE
AR
CO
MB
. LIGH
T RH
]
L 1LIC
ENS
E PLATE LIG
HT LH
L 2LIC
ENS
E PLATE LIG
HT R
H
R15
RE
AR D
IFF. LOC
K S
W
H 6
HA
ZAR
D S
W
TAIL RE
LAY
120A ALT
G–REL
W–B
Around the leftedge of thereinforcement
R 4RHEOSTAT
R 3RHEOSTAT
G 3
GLO
VE B
OX
LIGH
T
G–R
G–R
G–R
G–R
G–R
G–R
2
B–W
10A TAIL
Pow er Source T aillight and Illumina tion
3C12 3C
4
G–R
(A/T )
G–R
G–R
G–R
G–R
G–R
W–G
W–G
W–G
W–G
W–G
1F
G–R
(A/T )
P19PA
SSE
NG
ER
AIRB
AGM
AN
UA
L ON
/OFF IN
DIC
ATO
R
A25
A/C
CO
NTR
OL A
SSE
MB
LY
E 4
ELE
CTR
ON
ICALLY
CO
NTR
OLLE
DTR
AN
SM
ISS
ION
PATTER
NS
ELE
CT SW
S 4
O/D
MA
IN S
W[SH
IFT LOC
K C
ON
TRO
L RE
LAY
]
A19AS
HTR
AY
ILLUM
INA
TION
(A/T )
W–BW–B
W–B
G–R
W–B
3H5 3H7 3H8
2
1
C 5
CIG
ARE
TTE LIG
HTE
RILLU
MIN
ATION
3I11 3I10
3A4 3I14
3H6
61E
173A
W–B
W–B
E A
B A
(*1 )
B A
(*1 )
G(*2)
G
(*2)
G
(*2)
G(*2 )
3C20
G–R(*3)
To Engine ControlModule<5–7><6–7>
3A3
, R
2R
1A
B
RA
DIO
AND
PLAYE
R
JUN
CTIO
NC
ON
NEC
TOR
BA
J 9J10
,
W–G
10 A
R
1L15
1L9
BOD
Y E
CU
W–G
1F3
G
133F
163F
G–R
G
G(*1)
(Except D
ouble Cab )
* 3 : 3RZ–FE, 2RZ–FE
6
3
W–B
JUNCTIONCONNECTOR
AJ 9D A
B B
D A
E A
3C18
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
10 TOYOTA TACOMA
2 2
1
31
2
2
ACC
IG1
ST1
AM1
W
4
W–B
G–B
2 2
W–B
1I2
1D4
2
1J5
1H5
61J
51C
21J
1 BN7
B–R
IG
W–B
B W–B
1F1
1D31D1 1D6 1H12 1D5
1H8 1E8
W
2
1
2
1
1
8
6
3F20
1E12
P ow er S ource Turn S igna l and H azard W arn ing Light H orn
1E11 1D7
3F16
6
IE IG
1
EA
R–B
G L–B
G–B
G–Y
G L–R
G–W
G–B
G G–Y
G–W
G–B
G–B
G–Y
G–Y
10
7
7 9 5
1
1 2 3
B–Y
L–R
40A A
M1
10ATURN
OFF
ON
H 6HAZARD SW
I14IGNITION SW
FLASHER RELAY
C14TURN SIGNAL SW[COMB. SW]
120A A
LT
50A J/B
RH
LH
W–B
E
W–B
3
1
1
2
1
BATTERY
R 6
RE
AR
TUR
NSIG
NA
L LIGH
T LH[R
EA
R C
OM
B. LIG
HT LH
]
Around the left edge ofthe reinforcement
Front left fender
F 3FR
ON
T TUR
N S
IGN
AL
LIGH
T LH
F 4FR
ON
T TUR
N S
IGN
AL
LIGH
T RH
W–B
W–B
W–B
B
R–L
G–R
4 BN7
13
G–Y
1
Around the rightedge of thereinforcement
Around the leftedge of thereinforcement
R 7
REA
R TU
RN
SIG
NA
L LIGH
T RH
[RE
AR C
OM
B. LIGH
T RH
]
C19HORN SW[COMB. SW]
H10HORN(Low)
L–W
B–R
RH LH
C12
TUR
N SIG
NAL IN
DIC
ATO
RLIG
HT[C
OM
B. M
ETE
R]
108
D A E A E A
21 BN7 13 IF1
D A
, J10J 9 A BW
–B
JUNCTIONCONNECTOR
W–B
W–B
W–B
W–B
W–B
L–B
G
G–R
R–L
W–B
L–W
R–B
G–R
1H 5HORN(High)
1J8
1K2
BODYECU
15AHORN. HAZ
B
W–B
W–B
6 3
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
BODY ECU
3 421
2
2
1
21
2
1
(*3 )
11 TOYOTA TACOMA
120A A
LT
15A D
OM
E
10AGAUGE
2
ACC
IG1
ST1
AM1 4
L–R
LG–B
I14IGNITION SW
40A AM
1
W–B
2 2 B–R
3D19
1I2
1L20 1H10
1F5
3 C
1
10
2
3A16
3A18
IG
3F21
3F16 1
D15
DO
OR
CO
UR
TES
YSW
FRO
NT LH
L–Y
B–R
W
DO
OR
OFFO
N
B
B–Y
B
W–B
G
W
BATTERY
B 6BU
CK
LE SW
LH
Around the left edge ofthe reinforcement
B–W
B B
* 3 : w/ Personal Light
* 5 : Double Cab, Extra Cab* 4 : Regular Cab
P ower S ource K ey R eminder and S eat B elt W arn ing Inte rior L ight
W–B
W–B W
–B W–B
W–B W–B
Around the rightedge of thereinforcement
IE
3 IG1
B–W
2 B
1 A(*5)
(*4) 2 A
(*5) 1 B
INTE
RIO
RLIG
HT
SEA
T BELT W
AR
NIN
GLIG
HT[C
OM
B. M
ETE
R]
DC
C12
C13
,
I16A
, B
LG–R
20 3D
16 3D
1 D (*2)
5 A (*1)
(*1)
(*2)
* 1 : w/ Tachometer* 2 : w/o Tachometer
1
P 5PERSONALLIGHT
15AACC
1I1
1G11
Y–B
15AECU–IG
1E2
L–Y
1L19
8
1J8 1L3 8 1L 1L11 4 1L 10 1L
3F2
3F13F3
4 11
From C
enter Airbag Sensor
Assem
bly<17–3>
1
D16
DO
OR
CO
UR
TES
YSW
FRO
NT R
H
1
D26
DO
OR
CO
UR
TES
YSW
RE
AR LH
Y–G
D27
DO
OR
CO
UR
TES
YSW
RE
AR R
H
1
1H9
12
3
2 IG1B
LG–B
LG–B
G–W
Y–G
Y–G
G–WG
B–W
13 1L 14 1L
See H
eadlight System
<7–2>
<8–2>
9 1L 15 1L
See Taillight and
Illumination S
ystem<
9–1>
(*4)
(Double C
ab )(D
ouble Cab )
(Double C
ab )
L igh t A uto T urn O ff
2
1
U 1
UN
LOC
K W
ARN
ING
SW
2003 TOYOTA TACOMA (EWD517U)
MEMO
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
B–Y
F
P
1
2
C
P
2
21
3 421
2
1
2
1
B
B–Y
A
W–R
W
Near the throttlebody
Front left fender
G
(Cont. next page)12 TOYOTA TACOMA
2
ACC
IG1
ST1
IG2
AM1 4
67 AM2
2
ENGINE CONTROL MODULE
2 22 2
1I4
1F11
2 2
See E
ngine Control
System
<30–8>
16 A 20 A 8 A 7 C 19 D 11 D
15 IF1D
2
1
3
5
2
7 IF1
8 7
EA
D3 2 D 1 D 22 C 23 C C17 3 B 21 B6 A 1 B
6 B 20 B 14 BD18 15 D 25 D
NO
. 1
NO
. 2
EB
See Engine C
ontrolSystem
<30–8>
SL
P ow er S ource E lec tronica lly C on tro lled T ransmission (5V Z– FE )
W–R
W
B–O
B–YW
–RW
–R
W–B
W–B
W–R
V LGLG
R–W
B–Y
120A ALT
40A AM
1
30A A
M2
20A E
FI
R–B
L–O
V 1VE
HIC
LE S
PEE
D S
ENS
OR
(Electronically C
ontrolled Transm
ission )
E 2ELE
CTR
ON
ICA
LLY C
ON
TRO
LLEDTR
ANS
MISS
ION
SO
LEN
OID
Y–R
BR
BATTERY
I14IGNITION SW
Y–RW
–R
O
7. 5AIGN
W
See Engine
Control S
ystem<
30–5>
See Engine C
ontrolSystem
<30–5>
5
EFIRELAY
B–Y
B–R
1
B–Y
LG
L–O
R
2
+B S1 S2 SL SP2– SP2+ E1
See Engine Control System<30–6><30–7>
NSW OILWSP1 PWR
BATT TCSTP +BM THOC E2 THW VTA VC R ODLP ODMS
2
1
Y–R
A 7
A/T O
IL TEM
P. S
EN
SO
RL–B
Y–R
D B
E A
, E 6E 5 A B , E 7 C , E 8 D
BA
JUNCTIONCONNECTOR
, J10J 9
15 A4 A
23 IF1
B–O
B–WB
–W
MREL IGSW
11 B
TFN
3E2
3E1
To Detection SW
(Transfer Neutral
Position )<20–1>
<21–4>
L
L
C
C
BR–B
R
L
B4
LJ
OI
GR–RH
GR
–R
J13JU
NC
TION
CO
NN
EC
TOR
B–Y
B–O
C
2
1
2
15A EC
TS
4 IF1
PP
P
2
5 E
W
SLT+
6
11 E
Y
SLT–
A1
4
EB–W
B–W
D
B25E4
VTA2S
LT
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
W–B
7 865
D
B–Y
B
I
H
A
G
12 TOYOTA TACOMA (Cont’ d)
1I2
3D19 3D18
1F5
3D13 3D16
5 IK3
13 A 1 D
3G22
3F20
3G17
3F16
6 D1 C
IG
3B
4 IK3
W–B
W–B
R–B
R–B
D
Around the right edgeof the reinforcement
IE
5
10
J11JUNCTIONCONNECTOR
Around the left edgeof the reinforcement
LGW
–B
R
7
E lec tronica lly C on tro lled T ransmission (5V Z– FE )
48
3
L 2 D R P
C6
R–B
B–R
B–R
B–R
B–R
O/D
OFF
R P B–W
R–B
R–B
LG
B–R
W–B
C
ECT P
WR
2
A/T O
IL TEM
P.
3
10AGAUGE
P 1PARK/NEUTRAL POSITION SW
E 4
ELEC
TRO
NIC
ALLY CO
NTR
OLLE
DTR
AN
SMIS
SIO
N P
ATTER
NS
ELE
CT S
WG
R–R
GR
–R
W–B
O
W–B
GR–R
O
D
2 1
NO
RM
PWR
P
S 4O
/D M
AIN S
W[SH
IFT LOC
K C
ON
TRO
L RELA
Y]
L–O
5 A
3D20
B–R
D
4
3B2
2 IK2
R–B
C10 C12,
COMBINATION METER
A C C13, D
FL–O
4 D
5 DA/T P
V
2 IK3
V
L–R
JL
16 IK2
2
1 D25
DIO
DE (A/T )
B–R
B–R
B–R
L
V
B B L–O
J13JUNCTIONCONNECTOR
R
P
EB–W
3 IK3
B–W
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
OILW
2
1 1TC
B
3 421
20A EFI
30A AM
2
STP
2
40A AM
1
VC THO RE2 VTATHW ODMS
PWR
2
120A A
LT
NSW
E
(Cont. next page)13 TOYOTA TACOMA
See Engine C
ontrolS
ystem<
5–7>
E1S2 SP2–SP2+SLS1+B
Y
2
ACC
IG1
ST1
IG2
AM1 4
67 AM2
2
A
R–Y
I14IGNITION SW
2 2
7. 5AIGN
1I4
2
EFI R
ELAY
2
To Cruise C
ontrolE
CU
<15–2>
OD1
1F11
2
15
2
11 A
3
5
See E
ngine Control
System
<5–5>
2
G
J
B–Y
H
15 IF1
BATT
EA
7 IF12
NO
. 2
2
NO
. 1
7 D 8 D 9 D16 A
1
14 B 23 B 17 C 5 A 17 A
SP1
A21
EF
7 B 26 D2 C 18 C 12 C 9 C 2 A 25 B
R
R–B
L
3
LG
A1 A
R
See E
ngine Control
System
<5–8>
W–R
WB–Y
B–Y
B–Y
B–Y
B–R
B–Y
B–Y
B–Y
W W–B
W–R
W–R
W–R
V
LGLG
R–W
Y–R
W–R
W–B
1 2 3
LG
SL
Front left fender
BATTERY
E 2
ELEC
TRO
NIC
ALLY CO
NTR
OLLE
DTR
AN
SMIS
SIO
N S
OLEN
OID
V 1VEHICLE SPEED SENSOR(Electronically Controlled Transmission)
To Cruise C
ontrolEC
U<
15–2>
22
O
GR
–R
BR
R–B
C
D
L
GR–R
P
Ignition coilbraket
A
B–Y
See Engine ControlSystem<5–5><5–6>
BW
ENGINE CONTROL MODULE
1 1
P ow er S ource E lectron ically Con trolled Transmiss ion (3RZ –FE )
2 1
D B
E A
1
2
A 7A/T O
IL TEMP
. SEN
SO
RY–R
L–B
See E
ngine Control
System
<5–6>
BAE 5 E 6, CE 7, DE 8,
J 9 J10,
JUNCTIONCONNECTOR
A B
IDLO
B5
B–O
2
4 A
P
ODLP
10 A
FL–O
L–O
3E2
3E1
23 IF1
B–O
TFN
9 A
L
IO(*1)
To Detection S
W(Transfer N
eutral P
osition )<21–4>
L* 1 : 4WD
C
C
J13JU
NC
TION
CO
NN
EC
TOR
L
(*1 )
BR
C
17 IK2 18 IK2
Y–R
W–R
AB–W
D
1 B
B–W
3H11
3H12 3H13
To Cruise
Control
EC
U<
15–2>
B–W
B–W
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
W–B
7 865
D
B–Y
C
I
H
B
G
13 TOYOTA TACOMA (Cont’ d)
1I2
3D19 3D18
1F5
3D13 3D165 IK3
13 A 1 D
3G22
3F20
3G17
3F16
6 D1 C
IG
3B
4 IK3
W–B
W–B
R–B
R–B
D
Around the right edgeof the reinforcement
IE
5
10
J11JUNCTIONCONNECTOR
Around the left edgeof the reinforcement
LGW
–B
R
7
E lec tronica lly C ontro lled T ransmiss ion (3R Z–F E )
48
3
L 2 D R P
C6
R–B
B–R
B–R
B–R
B–R
O/D
OFF
R P B–W
R–B
R–B
LG
B–R
W–B
D
ECT P
WR
2
A/T O
IL TEM
P.
3
10AGAUGE
P 1PARK/NEUTRAL POSITION SW
GR
–R
GR
–R
GR
–R
W–B
O
W–B
GR–R
O(*1)
E
2 1
NO
RM
PWR
P
S 4O
/D M
AIN S
W[SH
IFT LOC
K C
ON
TRO
L RELA
Y]
L–O
5 A
3D20
B–R
D
4
3B2
2 IK2
R–B
C10 C12,
COMBINATION METER
A C C13, D
FL–O
4 D
5 DA/T P
V
2 IK3
V
L–R
JL
16 IK2
B–R
2
1 D25
DIO
DE
(A/T )
L
V
B B
E 4
ELEC
TRO
NIC
ALLY CO
NTR
OLLE
DTR
AN
SMIS
SIO
N P
ATTER
NS
ELE
CT S
W
J13JUNCTIONCONNECTOR
L–O
* 1 : 4WD
(*1 )
3 IK3
B–W
B–WA
B–W
(*1 )
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
2
1 1
TC
3 421
20A EFI
30A AM
2
STP
2
40A AM
1
VC VTATHW
2
120A A
LT
NSW
14 TOYOTA TACOMA
See E
ngine Control
System
<6–7>
E1+B
2
ACC
IG1
ST1
IG2
AM1 4
67 AM2
2
A
I14IGNITION SW
2 2
7. 5AIGN
1I4
2
EFI R
ELAY
2
1F11
2
15
2
3
5
See Engine C
ontrolSystem
<6–5>
2
B–Y
15 IF1
BATT
EA
7 IF12
16 A 17 C
SP1
A21
EF
7 B 2 C 12 C 9 C1 A
See E
ngine Control
System
<6–8>
W–R
WB–Y
B–Y
B–Y
B–Y
B–R
B–Y
B–Y
B–Y
W W–B
W–R
W–R
W–R
W–B
Front left fender
BATTERY
22
BR
Ignition coilbraket
A
B–Y
See Engine ControlSystem<6–5><6–6>
ENGINE CONTROL MODULE
1 1
P ower S ource A u tomatic Transmiss ion (2RZ –FE )
2 1
D B
E A
See Engine C
ontrolSystem
<6–6>
BAE 5 E 6, CE 7,
J 9 J10,
JUNCTIONCONNECTOR
A B
IDLO
B5
B–O
3E2
3E1
23 IF1
B–O
9
4
B–W
P 1PARK/NEUTRALPOSITION SW
15A EC
U–IG
1I2
3D19
1G2
5 A
6 IK3
7 IK3
3D18
2
1
3D10
16 IK2
10A G
AUG
E
1F5
6 C
3G14
3D20
17 3G
IEAround the rightedge of thereinforcement
IG Around the leftedge of thereinforcement
10
5
22 3G
Y–R
B–R
B–RO
/D O
FF
B–R
B–R
B–R
B–R
B–R
O1
O/D
SO
LENO
IDB
–RB
B
SOL
2
B
LG
W–B
W–B
S 4O
/D M
AIN S
W[S
HIFT LO
CK
CO
NTR
OL R
ELAY]
W–B
8 5 7 3 1
W–B
W–B
L–O
B
J13JU
NC
TION
CO
NN
EC
TOR
L–O
ODMS OD1
R–Y
IG
Y–R
ODLP
TO C
ruise Control
EC
U<
15–2>
O 6O/D ECU
CO
MB
INA
TION
ME
TER
CA
C10
C12
,
E1
3 IK3
3H12
B–W
3H13
B–WTo C
ruise Control EC
U<
15–2>
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
2
1
11
2
(M/T)
2
4
Pi
To Shift Lock
Control R
elay<
25–2>
(M/T)
CR
UIS
E
W–B
R–W
W–B
From E
ngineC
ontrol Module
<12–2>
<12–3>
<13–2>
<13–3>
Y–R
(A/T )
LG
G–O
15 TOYOTA TACOMA
W–B
IG
From O
/D E
CU
<14–4>
(2RZ–FE
A/T )
R–Y
To ABS Actuatorwith ECU<16–4>
2
ACC
IG1
ST1
AM1 4
I14IGNITION SW
CCS
(A/T )
R 7
STO
P LIGH
T RH
[RE
AR
CO
MB
. LIGH
T RH
]
L–W
W–B
G–W
L–B
* 1 : w/ Cruise Control Except 5VZ–FE 4WD, 5VZ–FE A/T
Y–B
R 6
STOP
LIGH
T LH[R
EAR
CO
MB. LIG
HT LH
]
To Data Link
Connector 1
<4–4>
<5–4>
<6–4>
G–W
G–W
G–W
G–W
2
Tc
G–W
2
G–W
L
1I2
(A/T)
G–Y
3D19
G–Y
3D16
1 1G
L–B
L–W
1F5
G–W
G–W
3D13
STP–MO
15 2
1
1
8
H 8
HIG
H M
OU
NTED
STOP
LIGH
T
8
3
1
2
5
3F
W–B
C 3CRUISE CONTROLACTUATOR W
–B
10AGAUGE
15AECU–IG
W
10
2
LG–B
IE
(A/T )
1 IK3
LGBATTERY
G–Y
GND
B–Y
RES/ACC
R–Y
SPD ECT
Around the leftedge of thereinforcement
To Engine C
ontrol Module
<4–8>
<5–8>
<6–8>
<30–8>
W–B
G–Y
OD
C17CRUISE CONTROL ECU
1 IG1
3F7
SET/COAST
B–R
W
3F8
8 BN7
43F
MC
93FB–W
(A/T )
3F5
13
B–W
B–R
2
1
3F
B–Y
6B–R
B D
Y–R
IDL
B–R
IG
C13
CR
UISE
CO
NTR
OL
IND
ICATO
R LIG
HT
[CO
MB. M
ETE
R]
21 BN7
C16
CR
UIS
E CO
NTR
OL
CLU
TCH
SW
W
CANCEL
1A2
40A AM
1
50A J/B
120A A
LT
3
4
39
G–W
4
To Speedom
eter[C
omb. M
eter]<
27–2><
28–3>
4
5
7
M
IE
146
C19
CR
UIS
E CO
NTR
OL S
W[C
OM
B. S
W]
12 1610
2
C ruise Contro l (5V Z– FE 2W D M /T, 3RZ –FE , 2RZ –FE )
Around the left edgeof the reinforcement
S top L igh tP ow er S ource
Around the rightedge of thereinforcement
Around the right edgeof the reinforcement
W–B
3H4
3H3
3A1016
3A
113A
W–B
(*1 )(*1 )
(*1)
(*1)
LG–R
4 1
3 2
S 5STOP LIGHTSW
G–W
W–B
1J8
1F2
2 1K
10A STO
P
From A/T Indicator S
W[P
ark/Neutral Position S
W]
<13–4>
<14–3>
(A/T )
R–Y
From Engine C
ontrolM
odule<4–6>
<5–8>
<6–8>
W–B
W–B
W–B
6 3
CCS
3A19
4
W–B
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
R–Y
Y–B
16 TOYOTA TACOMA
13
1
9B–L
B–R
B–R C13
ABS W
AR
NIN
G LIG
HT
[CO
MB. M
ETER]
1
2
ACC
IG1
ST1
AM1 4
23
W
GR
From Stop Light S
W<
15–4>
A 9ABS DECELERATION SENSOR
G–W
WBR
R12REAR ABS SPEEDSENSOR RH
R11REAR ABS SPEEDSENSOR LH
B–L
B–L
B
B–L
B
F 2FRONT ABS SPEEDSENSOR RH
GND
TS
EF11
B–Y
B
1
TCEXI4STPVGSGGNDGL1+BS+BMWAIG1EXI2
FL+ FL– FR+ GNDRR–RR+RL–RL+FR–
VGSGGNDGL1
321
To Data LinkConnector 3<4–3><5–4><6–4><30–3>
2 2
11
2
1I2
1 1G 1F5
2519
9 8 31
BATTERY
30 11 12 233 34 24
W–B
W–B
WW
BWB
B
BG
WR
LP
LP
120A ALT
40A A
M1
60A AB
S
22
15161710297
Front right fender EC
B
2 1
B–L
4
2BN717
W
BN718BN720
2 1
19 BN7IF26
12
I14IGNITION SW
10A GA
UG
E
IF22
Y BR
Y BR
IF210IF24
F 1FRONT ABS SPEEDSENSOR LH
2
A B S
1
Y–R
Y–R
To Rear D
iff. LockD
etection SW
<22–4>
2 3H
4 3H
15A E
CU
–IG
To Detection SW
(Transfer L4 Position )
<20–3>
<21–4>
A22ABS ACTUATOR WITH ECU
* 1 : w/ Rear Diff. Lock* 2 : w/o Rear Diff. Lock
P ow er S ource
R G16 3D
ABSINVERTER
19 3D
(4WD
)
BN716
L–Y(*1)
L–Y
EF12
13H
Y–R(*2)
12 BN7
L–YL–Y
1 3B
2 3B
A
A
(M/T *2 )
(A/T *2 )
J13JUNCTIONCONNECTOR
L–Y(A/T *2)
(M/T *2 ) Y–LG
(*2 )
(*3 )
(*3 )
(*3 )
2 BO2
BV12
1 BO2
BV11
4 BO2
BV14
3 BO2
BV13 (*2)
(*1)
2 1Y–LG(*2)
D30DIODE(ABS)
W
D/G
14
EXI
21
G–B
From A
DD
Actuator<
20–3><
21–1>
(Shielded )
W–B
W–B
* 3 : 4WD and Pre–Runner
2
1
W
30A AB
S2
F11FU
SE B
OX
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
17 TOYOTA TACOMA
2
ACC
IG1
ST1
IG2
AM1 4
6
I14IGNITION SW
7 AM2
2 2
1I4
3H16 3H14
1M3
3H15
2
ID IH IG
21 BN7
2 IK2
22 BN7
3
5
3
5
(*4)4 B
(*3)3 A
(*3)2 A
(*4)8 B
16 IK2
W
2
W–R
W
B–W
YY
Y
Y–B
B–R
B–Y
W
L G
BRBR
W–B
R–B
R–B
W–B
R–B
R–B
(M/T )
(A/T)
To Data Link
Connector 3
<4–3>
<5–4>
<6–4>
<30–3>
40AAM1
120AALT
30AAM2
2
CENTER AIRBAG SENSOR ASSEMBLY
BATTERY
A18AIRBAG SQUIB(Steering Wheel Pad)
SPIRALCABLE
Rightkickpanel
R 6
BAC
K–U
P LIG
HT LH
[RE
AR C
OM
B. LIGH
T LH]
R 7
BA
CK
–UP
LIGH
T RH
[RE
AR
CO
MB
. LIGH
T RH
]Pow er Source S R S B ack–U p L igh t
* 1 : Double Cab
4 3B
3 3B
* 3 : A/T Except 2RZ–FE
(A/T)R–B
* 2 : Except Double Cab
22
1
W–B
W–B
B
Around the rightedge of thereinforcement
IE
17 3G
16 3G
P–P+
P19PA
SSE
NG
ER
AIRB
AG
MAN
UAL O
N/O
FFIN
DIC
ATO
R
1
2
17 3H
11
1
3 1G
3H19
Y–R
Y–R
10
2 1
A21AIRBAG SQUIB(Front Passenger Airbag Assembly)
B
W–R
11
G–W
GR
P20PA
SSE
NG
ER
AIRB
AG
MAN
UAL O
N/O
FF SW2 3
LG
WTo D
ata LinkC
onnector 3<
4–4><
5–4><
6–4><
30–4>
1
B
G–R
4
3 B12 B6 B
28 B13 B14 B
B
27 B
AC20 C21,
C2 1 C11 B10 B
2
P21PRETENSIONER LH
A21AIRBAG SQUIB(Front Passenger Airbag Assembly)
112
YY–B
G–R
LG
2 IF3 1 IF3
26 B 15 B
BR–W
F10FRONT AIRBAGSENSOR RH
20 B 9 B
B–L
1 2 1 2
B
F 9FRONT AIRBAGSENSOR LH
W–R
CC22,
* 4 : 2RZ–FE A/T
IG1 SIL –SL +SL –SR +SR LA
E1P+ P– PL+ PL– D+ D– E2
Left kickpanel
(*2 )
(*2 )
(*2 )
(*2 )
(*2 )
6 A5 A
P22PRETENSIONER RH
21
YY–B
PR+ PR–
(*1 )
(*1 )
Around the left edge of thereinforcement
W–B
1
2
B 1
BAC
K–UP LIG
HT S
W
R–B(A/T)
(A/T)
B–R
(M/T )
R–B
(M/T )
B–R
19 B
TC
P 1 A , B
BACK–UP LIGHTSW[PARK/NEUTRALPOSITION SW](A/T)
6
5 B
IG2
3H18
Y–R
7. 5AIGN
1I2 5 1F
15AECU–IG
10AGAUGE
B–R183D
193D
B–R
* 5 : Except 5VZ–FE
To Buckle SW
<11–2>
LG–B
11 C
LBE+
4 C
SR
S
1 C
3F20
3F16
W–B
W–B
W–B
CO
MBIN
ATIO
N M
ETE
R
CA
C10
C12
,
5 A
3D20
B–R
(*2 )(*2 )
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
W
18 TOYOTA TACOMA
V
GR
GR
R–Y
2
ACC
IG1
ST1
GR
AM1 4
V L
1I2
2
2
1
15A DO
ME
12 IH2 9 IH2 8 IH2 1 IL2 3 IL2 11 IL2 9 IL2
10
1 6 7 4 3 2 1 6
55 2
8
2
IG
M
8
4 1
2
M
2
IH2111 IH2
L
L–R
G–B
G–BL
B–L
R–Y
GR
L–B
GR
B–Y
B–R
W
L–B
I14IGNITION SW
40A AM
1120A
ALT
15AECU–IG
D21
DO
OR
KEY
LOC
K AN
DU
NLO
CK
SW
LH
D22
DO
OR
KEY
LOC
K A
ND
UN
LOC
K SW
RH
D20
DO
OR
LOC
K CO
NTR
OL
SW
RH
D22
DO
OR
LOC
K MO
TOR
AN
D D
OO
RU
NLO
CK
DE
TEC
TION
SW
FRO
NT R
H
D21
DO
OR
LOC
K M
OTO
R AN
D D
OO
RU
NLO
CK D
ETEC
TION
SW FR
ON
T LH
W
V
W–B
W–B
L–W
L–W
W–B
W–B
W–B
Around the left edgeof the reinforcement
BATTERY
IE
Door Lock C on tro lP ow er S ource
2
1
UN
LOC
K
LOC
K
LOC
K
UN
LOC
K
LOC
K
UN
LOC
K
LOC
K
UN
LOC
K
2
1
Around the right edgeof the reinforcement
1E2
4
L–Y
L–Y
3E14
3E16 3E19 3E
83B
30APOWER
2
1
1K2
2
50A J/B
2
1
3E183B13
3B12
3E17 3B11
1L7 1L5 1L11L6
2 B
2 A
5 B (*2)
7 A (*1)
3 A (*1)
1 B (*2)
P 7
A,
B
DO
OR
LOC
K CO
NTR
OL S
W LH
[PO
WE
R W
IND
OW
MA
STE
R S
W]
B–L
3 IH2
B–L
7 IL2
R–Y
6 IL2
93B
73B
22 1L
B–L
21 1L
R–Y
B–L
R–Y
W–B
4
W–B
W–B
7 1H
3B20
3B22 3B21
10 IH2
L–W
L–W
IL212
IL22
IH22
W–B
W–B
W–BW–B
L–R L
L–W
W–B
6 1H 2 1L
L–W
L
M
7
3
L–W
1
2
M
LL–W
BQ12 BR12
1 BQ1 1 BR1
L L
BODY ECU
8 1J
L–W
L–W
L–WLL
W–B
G–B
W–B
W–B
L
L–W
L–W
R–Y
B–L
W–B
L–W
B–R
B–R
3
8 15 14
D28
DO
OR
LOC
K MO
TOR
RE
AR LH
D29
DO
OR
LOC
K MO
TOR
RE
AR R
H
(*1 )
(*1)
(*1 )(*1 )
(*1 )
(*1 )(*1 )
(*1 )
(*1)
(*1 )(*1 )
W–B
1L101L41L111L8
See Interior Light<11–3>
* 2 : Except Double Cab* 1 : Double Cab
15
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
W
19 TOYOTA TACOMA
2
ACC
IG1
ST1
AM1 4
2
2
M1 2
M1 2
4 BQ1 3 BQ15 BQ1
5 IH3 4 IH3
2 4
1 5
2
I14IGNITION SW
40A AM
1120A
ALT
W
BATTERY
L–O G
W–B
L–Y L
R–L
L–B
Y LG
L–R
P 8POWER WINDOW MOTORFRONT LH
P27POWER WINDOW MOTORREAR LH
UP
DO
WN
P ow er W indowP ow er S ource
2
1
2
L–R
1
L–Y
1 5
2 3
2
50A J/B
2
1
2
1E2
2
1
15A DO
ME
1I2
1
2
1K2
1L11
143B
3B15
163B
1C1
15AECU–IG
30APOWER
PWRRELAY
P25PO
WER
WIN
DO
W C
ON
TRO
LSW
RE
AR LH
M2 1
10 IL2 5 IL24 IL2
5 IH2 7 IH2
5 2
3 1
L–O G
R–B
R–G
R–B
R–G
L–R
P 9POWER WINDOW MOTORFRONT RH
UP
DO
WN
P 6PO
WER
WIN
DO
W C
ON
TRO
LSW
FRO
NT R
H
M1 2
4 BR1 3 BR15 BR1
6 IH3 7 IH3
2 4
1 5
L–O G
Y LG
Y LG
L–R
P28POWER WINDOW MOTORREAR RH
UP
DO
WN
P26PO
WER
WIN
DO
W C
ON
TRO
LSW
RE
AR R
H
9 B (*2)
10 A (*1)
R–G
R–B
R–L
L–B Y LG
3 A
1 B
1 A
3 B
5 A
4 B
14 A
8 B
6 A
10 B (*2)
9 A 12 A 8 A 13 A (*1)
2 IH2
W–B
3B9
3B8
IE Around the right edgeof the reinforcement
IG Around the left edgeof the reinforcement
UP
DO
WN
UP
DO
WN
FRONT RH REAR LH REAR RH
8 1J
4
8 2
10 3
L–R
L–R
L–R
W–B
W–B
W–B
W–B
L–R
B–R
B–R
L–R L–RL–R
B–Y
W–B
L–R
4 3 3
4 IH2
L–R
P 7 A , B
POWER WINDOW MASTER SW
* 1 : Double Cab* 2 : Except Double Cab
(*1 )
(*1 )
(*1 )(*1 )
(*1 )
(*1 )(*1 )
(* 1)(*1)
(*1 )(*1 )
(*1 )
(*1 )
(*1 )(*1 )
(*1 )(*1 )
(*1 )
AU
TOD
OW
N
UP
DO
WN
BODY ECU
LOC
K
NO
RM
AL
WIN
DO
W LO
CK
SW
4 1L
See Interior Light
System
<11–3>
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
5
40AAM1
10AGAUGE
1
20 TOYOTA TACOMA
1
2
2
V
2
ACC
IG1
ST1
W
AM1 4
VL–R
2
W
1I2
1F5 1J1
3D20
3D193D18
B–R
16 IK2
2 IK3
1
3
2
9 IK3
1
2
2
1
3I
W–B
Around theleft edgeof thereinforcement
IG
26 IK2
11 IK6 9 IK6 12 IK6 10 IK6
1
2
2
1
IE
163F
123FIK2
4
M
4
GR Y–R P
B–RB
–R
B–Y
B–R
GR
125
2110
6 18 9 22
C
CC
I14IGNITION SW
120AALT
20A4WD
C10
4WD
IND
ICA
TOR
LIGH
T[C
OM
B. M
ETE
R]
C13
A/T PAR
KING
IND
ICA
TOR
LIGH
T[C
OM
B. METER
]
J13JUNCTIONCONNECTOR
F 64WD ECU
P 1A/T IN
DIC
ATO
R S
W[P
ARK
/NE
UTR
AL PO
SITION
SW
]
LL
W–B
W–B
W–B
Y–R P
W–B
(A/T )(A
/T )(A/T )
D 4
DE
TEC
TION
SW
(Transfer Neutral
Position )
D 5
DE
TEC
TION
SW
(Transfer 4WD
Position )
D 3
DE
TEC
TION
SW(Transfer L4 Position )
BATTER
Y
W–B
R
W–B
L W
L
From R
ear Diff.
Lock EC
U<
22–3>
Y–B
GR
4W D (w / 2–4 S e lect SW )P ow er S ource
W–B
(*1 )
W–B
GR
13 26
W–B W–B
4 25
W–B
4
(A/T )
3 6
(A/T )
1
GR
2
3G
W–B
Around the right edgeof the reinforcement
T 32–4 SE
LECT S
W
T 22–4 SELECT MOTOR
(A/T)
3
G–O
4WD
To Speedom
eter[C
omb. M
eter]<
27–3><
28–3>
IND TM1L4 TL1 TL2 TM2 2–4 GND
SPD
19
IG
W–B
3E13
3E12
B–Y
B–Y
(A/T )
L(A/T )
73I6
3I9
3I8
From A
BS A
ctuatorw
ith EC
U<
16–4>
3G17
203G
(A/T)7 IK2
R–L
R–LFrom
Engine C
ontrolM
odule<12–4>
2
1
L(A/T )
(A/T )
D25
DIO
DE (A/T )
B–R(A/T)
3H20 22 3H
B–Y
7 IK6
2 EB3
From E
ngineC
ontrol Module
<30–8>
GR
GR
G–W
EB31
IK23 5 IK6
4 EB3 EB33
IK66 4 IK6
5 EB3 EB36
IK63
3 6 2 5 1 4
19 10 23 11 24
ADD DL1 DL2 DM1 DM2
W–B
(A/T )
G–B
L–R
LG
R–B
L–Y
W–B
W–B
L–Y
R–B
LG
L–R
G–B
W–B
L–Y
R–B
LG
L–R
G–B
G–B
+B L1 L2 M1 M2 GND
From Engine C
ontrolM
odule<30–8>
G–B
A24ADD ACTUATOR
W–B
(*2 )
(*2 )
(*2 )
(*2 )
(*2 )
(*2 )
(*2 )
(*2 )
(*2 )
(*2 )
(*2 )
(*2 )(*2 )
(*2 )
(*2 )
(*2 )
(*2 )
(*2 )
(*2)
* 1 : w/ ABS* 2 : w/ ADD
M
AD
DD
ETECTIO
NS
W
AD
D LIM
ITS
W
W–B
W–B
G–B
To ABS
Actuator with
EC
U<
16–1>
G–B
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
21 TOYOTA TACOMA
2
ACC
IG1
ST1
AM1
2
(A/T )
1F5
2
1
2
16 IK2
9 IK3
1
3
2 IK3
2
1
1
2
3D19
10
5
Pow er Source 4W D (w /o 2– 4 S elec t S W )
I14IGNITION SW
2
1
IK2
40A AM
1120A
ALT
26
WW
4
(A/T )
L–R
5
V
4
(A/T )
1
1I
W
BA
TTER
Y
P 1A/T IN
DIC
ATO
R S
W[P
ARK/N
EU
TRAL
POSITIO
N S
W]
C13
A/T PAR
KING
IND
ICA
TOR
LIGH
T[C
OM
B. METER
]
3I
B–R
V
C
L
1J
2
(A/T )
7
D 4
DE
TEC
TION
SW
(Transfer Neutral
Position )
W–B W–B
GR L
W–B
W–B
(A/T)
D 3
DE
TEC
TION
SW
(Transfer L4 Position )
8
C
C
(A/T )L
J13JUNCTIONCONNECTOR
3I
6 3I
* 1 : w/ ADD
1
2
IK66 IK64 IK67 IK65
3 EB3 5 EB3 2 EB3 4 EB3
IEAround the rightedge of thereinforcement
IG Around the leftedge of thereinforcement
7 IK2
6 EB31 EB3
From E
ngineC
ontrol Module
<12–4>
<13–4>
2
1IK63
3E11
3E12
3H22
3H20
3 IK2
M1 M2 REL1 REL2
M1 M2 L1 L2 GND+B
4WD IG 2WD
C104WD INDICATORLIGHT[COMB. METER]
3D20
G–B
B–YB
–Y
B–R
B–YB
–YB
–Y
B–Y
B–Y
W–BR
–B
L–Y
L–R
LG
W–B
G–B
R–B
L–Y
L–R
LG
W–B
G–B
W–B
R–B
L–Y
L–R
LG W–B
B–R
W–BW–B
B–Y
B–Y
B–R
From A
BS Actuator
with E
CU
<16–4>
From E
ngine Control
Module<
5–8>
From R
ear Diff.
Lock EC
U<
22–3>
GR
GR
GR
(A/T )
GR
GR
B–Y
D25DIODE(A/T)
(A/T )
(A/T )L
(A/T )
B–Y
D 5
DE
TEC
TION
SW(Transfer 4W
D P
osition )
A24ADD ACTUATOR
T 4TRANSMISSION CONTROL RELAY
20A4WD
10AGAUGE
(*1 )
(*1)
(*1 )
(*1 )
(*1 )(*1 )
(*1 )(*1 )
(*1 )
(*1 )(*1 )
(*1 )
(*1 )(*1 )
(*1 )
(*1 )(*1 )
(*1 )
(*1 )
GND
W–B
W–B
(*1 )
W–B
W–B
(*1 )
G–B
(*5)
(*5 )
(A/T )
1 4 5 10 2 7 3 9
3 5 1 6 2 4
M
AD
DD
ETE
CTIO
NS
W
AD
D LIM
ITS
W
B–R(A/T)
W–B
W–B
G–B To EngineControl Module<5–8><30–8>
3D18
W–BG–B
From ABS Actuatorwith ECU<16–1>
G–B
4 IK2
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
20A4WD
2 1I
5
1J1
2
11 BN7 10 BN7 BN715 BN7 14
1
22 TOYOTA TACOMA
10AGAUGE
21
4AM1
ST1
IG1
ACC
2
2
40AAM1
120AALT
W
2
Around the leftedge of thereinforcement
IG
5 BO1 3 BO1 2 BO1 1 BO1
M
W–B
18 3G
21 3H11 3D
3G17
3H22
7 BO1
19 3D
5 10 8
7 2 3 6 9
B–Y
B–R
W
BN7
G–O
P
LG–B
LGV
W–B
V LG
LG–B
P
R15
RE
AR
DIFF. LO
CK
SW
Rear D ifferen tia l Lock
To Speedom
eter[C
omb. M
eter]<
27–3>
To Detection S
W(Transfer L4 P
osition )<
21–4>
GND
P ow er S ource
M2 M1 REL2 REL1
IG SPD 4WD
R16REAR DIFF. LOCK ECU
2
1
2
1
LG–R
LG
LG–B
LG–Y
2 3 5 6
W–B
5 1F
BATTERY
R14REAR DIFF. LOCKMOTOR
4
I14IGNITION SW
(A/T )
B–Y
R–B
R
R–B
W–B
(M/T )
W–B
L–Y
RLP
L–Y
(A/T )
L–Y
(A/T )
L–Y
(A/T )
L–Y
(M/T)
(M/T )
L–Y
L–Y
(M/T )
L–Y
L–Y
L–Y
R13REAR DIFF. LOCKDETECTION SW
3B3
From A
BS A
ctuatorw
ith ECU
<16–1>
4 3B
From A
BS Actuator
with E
CU
<16–1>
2 3B
BO14
BN712
4
2
1
BO16
W–B
W–B
IEAround the rightedge of thereinforcement
B–Y
B–R
(A/T )
W–B W–B W–B
L–Y
To Detection S
W(Transfer L4 P
osition )<
20–3>
GR
(*1 )
L–Y(M
/T )
J13JUNCTIONCONNECTOR
A A A
A
* 1 : w/ 2–4 Select SW* 2 : w/o 2–4 Select SW
GR
(*2 )
3B1
3D16
B–R
B–R
C13
RE
AR D
IFF. LOC
KIN
DIC
ATO
R LIG
HT
[CO
MB. M
ETER]
7
1
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
1
W–B
7
23 TOYOTA TACOMA
42
ACC
IG1
DO
WN
/R
IGH
T
AM1
3
1
2R
IGH
T
UP
2
DO
WN
1I2
3D6
M
2
W 1WASHER MOTOR
W–B
R
1
3213
WASHER
OFF
INT(*3)
LO
HI
2
LH
11
2
UP/
LEFT
RH
8
LH
3F16
3
LEFT
5
3F18
1
40A A
M1
IE
2
120A ALT
17
IG
W
63
M
R
LG–B
WIPERRELAY(*3)
LG–R
GR
L–O
G–B
P–G
L–O
G–B
G–R
L–R
RR
L–R
W–B
1I1
W–B
B–Y
SELE
CT
P–G
GR
1G12
R
RH
G–R
L
G–B
R
63G
W–B
43G
W–B
W–B
16
IG
W–B
W–B
7
R–W
L–B
8
L–W
2
R emote C on tro l M ir ror (w / P ower W indow )W iper and W asherP ower S ource
1
ST1
4
W
OPE
RATIO
N
2
L–O
5
L
3 IL1 7 IL1
2
5 IL1
M M
4
M M
IE
L–O
BATTERY
I14IGNITION SW
20AWIPER
15AACC
C15WIPER AND WASHERSW[COMB. SW]
W 3WIPERMOTOR
R 8REMOTE CONTROLMIRROR LH
R 9REMOTE CONTROLMIRROR RH
R10REMOTE CONTROL MIRROR SW
Around the rightedge of thereinforcement
Around the right edgeof the reinforcement
Around the leftedge of thereinforcement
W–B
Around the left edge ofthe reinforcement
9 3B
3B8
MIST(*4)
3D9 3D7
1G13
2 IH1
IH39
5 IH1
IH313
7 IH1
IH311 2 IH2(*5)
(*6)
3 IH1
IH38 (*5)
(*6)
L L
* 4 : w/o Int Time SW Mechanism* 5 : Double Cab
B1 *2 EW WF*1+2+1+B+S
* 2 : INT2* 1 : INT1
* 3 : w/ Int Time SW Mechanism
* 6 : Except Double Cab
83D
L
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
1
W–B
7
24 TOYOTA TACOMA
2
ACC
IG1
DO
WN
/R
IGH
T
AM1
3
1
2
RIG
HT
UP
2
DO
WN
R
B–R
32132
LH
2U
P/LEFT
RH
8
LHLEFT
40A AM
1120A ALT
W
63
R
LG–B
LG–R
GR
LG–B
P–G
LG–R
R
L–R
W–B
1I1
SE
LEC
T
P–G P
1G12
R
RH
G–R
G–B
R
W–B
IG
2
P ow er S ea t
1
ST1
4
W
OP
ER
ATIO
N
25
3 IL1 7 IL1 5 IL1
M M M M
IE
L–O
BATTERY
I14IGNITION SW 15A
ACC
R 8REMOTE CONTROLMIRROR LH
R 9REMOTE CONTROLMIRROR RH
R10REMOTE CONTROL MIRROR SW
Around the rightedge of thereinforcement
W–B
Around the left edge ofthe reinforcement
9 3B
3B8
1
2
2
50A J/B
RGR
P–G
7 IH1 5 IH1 3 IH1
B–R
1K2
1C4
30APOWER
2 BU1
M2 11 BU1
W–B
W–B
L R
WW
W–B
B–R
P24POWER SEAT SW(Lumbar Support)
P23POWER SEAT MOTOR(Lumbar Support)
2 4 3
1
1
2
P ow er S ource Remote C on tro l M ir ror (w /o P ow er W indow)
3G6
3G4
L–O
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
STP
3 421
1
2
IG ACC
BATTERY
Around the left edgeof the reinforcement
KLS+ E
2
Pow er Source S h ift Lock P ow er O u tlet
2
2
1
3
W
120A ALT
From Stop Light SW<15–4>
S 4SHIFT LOCKCONTROL RELAY
25 TOYOTA TACOMA
40A AM
1
4
3
AM1
ST1
IG1
ACC
2
2
6
2
3G
9 3G
2
1I2 1 1I
4 1H 1G12 2
1
3
5
3
4
IG
20 3A
3A16
6 7
1 8
B–Y
L–R
W–B
15AACC
W–B
L–R
W–B
W–B
2
L–O
W G–W
I14IGNITION SW
15AECU–IG
IEAround the right edgeof the reinforcement
W–B
W–B
W–B
2
IF110
G–B G–B
1
18 IF1
D B
E A
17 3G
3G21
1
Front left fenderEA
A
2 2
A
P13PO
WER
OU
TLET
P14PO
WER
OU
TLETW
–B
W–B
R–B
R–B
W–B
W–B
R–B
R–B
W–B
PWROUTLETRELAY
L–W
L–W
J 9 J10,
JUNCTIONCONNECTOR
A B
U 1KEY INTERLOCKSOLENOID[UNLOCK WARNING SW]
15A PW
R O
UTLE
T1
2
A
J11JU
NC
TION
CO
NN
EC
TOR
6 1G
Y–R
L–O
Y–R
L–R
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421W
–B
26 TOYOTA TACOMA
5 1
32
2
12
2
1
21
4
WB–W
L–Y
2
ACC
IG1
ST1
GR
AM1
3
L LG
2 2 2 2
1I1 1G12
1H3
3C7
1G10
1E2
4 A
2
2 B 6 B 7 A
IH IG
3F16
3F19
3C16
3C15
2
1
1
1
2
3
1 A 5 A 2 A 6 A
IL16 4 IL1
3G6
2
3G7 3G8
2
1 12 2
3C6
3C5
I14IGNITION SW
40A AM
1
PPLGL
L–YL–Y
L–Y
L–O
L–Y
L–R
B–W
L–Y
TAIL R
ELAY
See Taillight and
Illumination S
ystem<
9–1>120A A
LT
15A DO
ME
15AACC
S 7SPEAKER(Front Door RH)
S 6SPEAKER(Front Door LH)
W–B
W
R W
IE
(*4 )
(*4 )
BR
BATTERY
BR
W–B
G–R
L–O
L–O
L–Y
G–R
VV
Right kickpanel
Around the left edgeof the reinforcement
C 4
CIG
AR
ETTELIG
HTE
R
C 7
CLO
CK
L–O
GB–W
10ATAIL
* 4 : Double Cab
* 2 : Regular Cab* 3 : Extra Cab
W–B
P ow er S ource Radio and P laye r C igare tte L ighte r and C lock
Around theright edgeof thereinforcement
R 1 R 2,
RADIO AND PLAYER
A B
Y(*4 )
(*4 )B
1 2
T 6TWEETER RH
2
T 5TWEETER LH
1
L (*1 )
LG(*1 )
P(*1 )
V(*1 )
6 IH1
IH312
4 IH1
IH310 (*4)
(Except *4)
2 BQ2
BQ16
1 BQ2
BQ18
1 BS1 2 BS1 BT12
6
BT11
BR1
2 BR2
8 BR1
BR21
1 B 3 B
R W(*4 )
(*4 )W(*4 )
(*4 )R
3 A
* 1 : 6 Speaker
* 5 : w/ Power Window* 6 : w/o Power Window
W(*2 )
W(*3 )
R(*2 )
R(*3 )
Y(*2 )
Y(*3 )
B(*2 )
B(*3 )
R(*2 )
W(*2 )
W(*2 )
R(*2 )
* 7 : Except Regular Cab
W–B
W–B
W–B
1E6
1F4
RL+ RL– RR+ RR– GND
ACC +B FR+ FR– FL+ FL–
1 12 2
S 8SPEAKER(Rear LH)
S 9SPEAKER(Rear RH)
(*5)
(*6)
(*5)
(*6)
2003 TOYOTA TACOMA (EWD517U)
MEMO
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
ST1
2 4AM1
ACC
IG1
(Cont. next page)27 TOYOTA TACOMA
2
B–R
15A DO
ME
120A ALT
40A A
M1
BATTERY
2
B–R
2
I14IGNITION SW
1 1
2
2 2
1
2 1I
10AGAUGE
L–Y
1F5
3D19
3D203D163D17
1 D 5 A
12 D 11 D
9 IK2
EBNear the throttle body
1 B
1 A
WATERTEMP. SENDER
(*2)
(*3)
8 D 14 D 7 D
See C
ruise Control
System
<15–2>
1
O 2
OIL P
RE
SSU
RE
SW
See R
ear Differential
Lock System
<22–4>
BR
Y–R
G–Y
Y–R
BR
9 DS
ee ABS
System<
16–3>
TACH
OM
ETER
3 A 1 A
A48 A2 A
20 IK26 IK2
11 IK2
LG–B
6 D 6 C 9 A 11 A 6 A 7 A
V10
VEH
ICLE S
PEE
DS
ENS
OR
See Electronically C
ontrolledTransm
ission System
<12–6>
<13–6>
See Autom
atic Transmission
System<
14–4>
See Engine C
ontrol System
<4–4>
<5–3>
<6–3>
<30–4>
6 BN7 9 BN7
3B17
3B193B18
W
ID
B–R
Left kick panel
BN72
3D23D13D33D4
From R
ear Diff.
Lock ECU
<22–3>
From 4W
D E
CU
<20–3>
From Engine
Control M
odule<
4–8><
5–8><
6–8><
30–8>
3D5
G–O
WL–Y
WATER
TEM
P.
CR
UIS
E
OIL
B–R
L–Y
B–Y
G–O
G–O
G–O
G–O
(*1 )
RR
DIFF. LO
CK
AB
S INV
ER
TER
AB
S
A/T O
IL TEM
P.
O/D
OFF
LG–B
L
G–R L
B–R
G–R
1
3
2
MA
LFUN
CTIO
NIN
DIC
ATOR
LAM
P
L
Y–B
FUE
L
FUE
L
Y–B
GR
BR
GR
BR
BR BR
3
1 2
F 8FU
EL SEN
DE
R
1E2
1H3
3C7
3C4
L–Y
* 3 : 3RZ–FE, 2RZ–FE* 2 : 5VZ–FE* 1 : w/ Cruise Control
C omb ina tion M e ter (w / Tachometer)P ow er S ource
From C
ruise Control
EC
U<
15–2>
15 IK2
B–R
B–R
C10 C12,
COMBINATION METER
A C C13, D
W 2 A , B
SPE
EDO
ME
TER
EF Ignition coilbraket
BR
(*3 )
(*2 )
10 IK2 IK28
G–Y
LG–B
LG–B
To Data Link
Connector 3
<5–4>
<6–4>
(*3 )
L–Y
(*2)
(*2 )
From Igniter<
1–4>(*2 )
From Engine C
ontrolM
odule<5–7>
<6–7>
(*3 )
LG–B
(*3 )
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
7 865
27 TOYOTA TACOMA (Cont’ d)
12 A
3G17
3G15
4
3
See 4WD
System
<20–2>
<21–2>
10 C 8 C 9 C
3 C
WA
SHE
R
10 A
L–RW
–BW
–B
SE
AT BELT
See Key R
eminder and
Seat Belt W
arningSystem
<11–2>
4WD
TUR
N LH
TUR
N R
H
HIG
H B
EAM
1 C
7 C
2 C
1D10
1E7
1D11
2
1
11
10
2
1
IE Around the rightedge of thereinforcement
IG Around the leftedge of thereinforcement
3F16
3F203A13
3A16
D 8
DA
YTIME R
UN
NIN
GLIG
HT R
ELAY(M
ain )
P 4PA
RKIN
G B
RA
KE
SW
B 2BR
AKE
FLUID
LEVE
LW
ARN
ING
SW
G–W
(*4 )D A
E B
EA Front left fender
13 A 15 D 4 D 10 D4 C
16 D 5 D 13 D
See C
harging System
<2–4>
See 4W
D System
<20–1>
<21–4>
See E
lectronically Controlled
Transmission S
ystem<
12–6><
13–6>
See T
aillight andIllum
ination System<
9–3>
See SR
S S
ystem<
17–3>
See C
harging System
<2–4>
See 4W
D S
ystem<
20–1><
21–4>S
ee Electronically Controlled
Transmission System
<12–6>
<13–6>
See Taillight and
Illumination S
ystem<
9–3>
See Turn Signal andH
azard Warning S
ystem<
10–4> See Headlight
System<
7–4><
8–4>
From C
lutch Start S
W(M
/T )or P
ark/Neutral Position
SW
(A/T )<
1–2><
2–2>
GB
ULB
CH
EC
KR
ELA
Y
BR
AKE
ECT P
WR
ILLUM
INATIO
N
A/T P
CH
AR
GES
RS
W 1
WA
SHE
R LE
VEL S
EN
SO
R
W–B
G–W
W–B
W–B W
–B
W–B
G–W
R–Y(*4)
W–B
G–W
W–B
W–B
* 4 : w/ Daytime Running LightC ombina tion M ete r (w / Tachomete r)
(*5)
(A/T )
(A/T )
* 5 : w/o Daytime Running Light
(*6 )(*6 )
* 6 : Cold Area Spec.
C10 C12,
COMBINATION METER
A C C13, D
J 9 J10,
JUNCTIONCONNECTOR
A B
See Electronically C
ontrolledTransm
ission System<
12–6><
13–6>
W–B
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
6 A
A5
(*1 )
2
O 2
OIL P
RES
SU
RE
SW
120AALT
40AAM1
(Cont. next page)28 TOYOTA TACOMA
3 A
1 B
2
C1
4AM1
ST1
IG1
ACC
2
1 A
9 BN7
3
2
2 BN7
7 A
ID Left kickpanel
3B19
Near thethrottle body
EB
3B17
1 D
3D
A2
WA
TER
TEMP
.
5
G–Y
3D20
A8
3D1617 3D
D12
3D19
D
10AGAUGE
D11
1F5
14
1G2
9 IK2
BU
LB C
HEC
KR
ELAY
20 IK2 6 IK2
3D13D3
W–B
3D4
1
L
C10
G–R
8 C C9
IE
B 2
BR
AKE
FLUID
LEVE
L WA
RN
ING
SW
Around the rightedge of thereinforcement
OIL
IG
* 3 : 3RZ–FE, 2RZ–FE
Around the leftedge of thereinforcement
G–Y
3F20
16 3F 3A16
3A13
2
Front leftfender
EA
7 C
E B
D A
1
2
2 C
1D10
1E7
111D
W–B
W–B
W–B W
–B
1
2
W–B
1
1
W–B
2
2
G–W
3
G–W
B–R
W–B
G–W
TUR
N LH
B–R
G–R
TUR
N R
H
LBR
HIG
H BE
AM
Y–R
G
Y–R
C omb ination M e ter (w /o Tachometer)
BR
G–O
GR
GR
I14IGNITION SW
BR
BR
WW
B–R
P ow er S ource
B–R
B–R
B–Y
B–R G
–O
G–O
G–O
BATTERY
From Engine
Control M
odule<
5–8><
6–8><
30–8>
BRA
KE
From 4W
D EC
U<
20–3>
From C
ruiseC
ontrol EC
U<
15–2>
See Headlight S
ystem<
7–4><
8–4>
From C
lutch Start SW(M
/T )or P
ark/Neutral P
ositionSW
(A/T )<
1–2><
2–2>
F 8FU
EL SE
ND
ER
V10VEHICLE SPEEDSENSOR
See Turn S
ignal andH
azard Warning Light
System
<10–4>
(*3)
(*2)
WA
TER
TEMP
. SE
ND
ER
JUNCTIONCONNECTOR
* 2 : 5VZ–FE
P 4PARKINGBRAKE SW
* 1 : w/ Cruise Control
15 IK2
B–RB
–R
1
C10 C12,
COMBINATION METER
A C C13, D
W 2
A,
B
, J10J 9 A B
* 4 : w/o Daytime Running Light* 5 : w/ Daytime Running Light
(*5)(*5)
11G–W R–Y
(*4)
D 8DAYTIME RUNNINGLIGHT RELAY(Main)
10
EF Ignition coilbraket
BR
BR
(*3 )
(*2 )
10 IK2 8 IK2
FUEL
11 A
6 BN7
1
Y–BY
–B
183B
FUEL
BR
SPE
EDO
ME
TER
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
7 865
D
See Taillight and
Illumination S
ystem<
9–3>
W–B W–B
15
W–B
D
WA
SH
ER
28 TOYOTA TACOMA (Cont’ d)
10 D 4 D
See Electronically C
ontrolledTransm
ission System
<12–6>
<13–6>
See Autom
atic Transmission
System
<14–4>
5
CH
ARG
E
See Taillight andIllum
ination System
<9–3>
A/T P
D13
See Cruise C
ontrolSystem
<15–2>
See Key R
eminder and
Seat Belt W
arningSystem
<11–2>
13 A
L–R
See Engine C
ontrol System<
4–4><
5–3><
6–3><
30–4>
See ABS
System
<16–3>
12 A
4WD
AB
S
10 A
MALFU
NC
TION
IND
ICA
TOR
LAMP
9 A
SEA
T BELT
CR
UIS
E
3 C
O/D
OFF
8 D6 C
Around the rightedge of thereinforcement
IE
6 D16 D 9 D
ECT P
WR
IG Around the leftedge of thereinforcement
W 1
WAS
HER
LEV
EL SEN
SO
R
ILLUM
INATIO
N
3
4
3G15
A/T O
IL TEM
P.
17 3G
ABSINVERTER
Combina tion M ete r (w /o T achometer)
See C
harging System
<2–4>
See 4W
D S
ystem<
20–1><
21–4>S
ee Electronically Controlled
Transmission System
<12–6>
<13–6>
See 4WD
System
<20–2>
<21–2>
See Charging S
ystem<
2–4>
See 4WD
System
<20–1>
<21–4>
See Electronically C
ontrolledTransm
ission System
<12–6>
<13–6>
(A/T )(A
/T )
* 6 : Cold Area Spec.
(*6 )(*6 )
C10 C12,
COMBINATION METER
A C C13, D
See E
lectronicallyC
ontrolled Transmission
System
<12–6>
<13–6>
SRS
4 C
See SR
S S
ystem<
17–3>
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
BATTERY
2
1
2
1
I14IGNITION SW
29 TOYOTA TACOMA
Front left fender
10AGAUGE
120A ALT
B 5BLOWER RESISTOR
A13
A/C
DU
AL PR
ES
SUR
E S
W
2
ACC
IG1
ST1
AM1 4
W B 4BLOWERMOTOR
1I2
1F5
2 2 2
B–Y
2
1 IF1
1
2
5
3
4
2
2
1
EA IE Around the rightedge of thereinforcement
W–B
2
2
1
2
2
9 IF1
2
1
M
4 1
W–B
W
W–B
40A A
M1
W–B
B–W
Y–R
RR
Y–RY
–R
B–W
B–WL–B
L–B
L–R
L–Y
W–B
W–B
HE
ATER
RE
LAY
L–B
B–W B–W
P ow er S ource A ir Cond ition ing
2
RR
2
2
1
50A HE
ATER
D B
E A
C A
A B
JUN
CTIO
N C
ON
NEC
TOR
BA
J 9J10
,
JUN
CTIO
N C
ON
NE
CTO
R
BA
J 9J10
,
22 IF1
3I5
3I2 3I4
1E5
L–W
2
2
1
50A J/B
7. 5A EC
U–B
1K2
1B4
B–RL–R
L–R
L–W
L–W
L–W
L–WB
–L
L–W
8 3 1
B–R
3 1
6 7 2
Y–G
R–G
B–R
B–R
A26AIR INLET CONTROLSERVO MOTOR
W–B
A
B
10AA. C
H 7HEATER BLOWER SW
2 3
M1 M2 HILO
8
1
56
4
Y–R
B–R
W–B
M
7
B–R
B–RB–R
B–R
FRES
HR
EC
IRC
IG+ FRS REC
(Cont. next page)
A25A/C CONTROL ASSEMBLY
W–B
3D14
3D19
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
7 865
29 TOYOTA TACOMA (Cont’ d)
A25A/C CONTROL ASSEMBLY
A15A/C
THE
RM
ISTO
R
A ir C ond ition ing
3F153F16
3F17
IGAround the leftedge of thereinforcement
24 IK2
1
1
2
W R B GR Y
4 5 3 2 1
4 5 12 13 11
G–O
LG–B
LG–B
L–B
L–Y
24 22 23 9 10
25 14
W–B
W–B
W–B
W–B
B–R
LGLG
A27AIR MIX CONTROL SERVO MOTOR
To Engine Control M
odule<
4–7><
5–7><
6–7><
30–7>
LG–B
M
A
BW–B
8 7 6 5 4 1
2
M
DEF
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F/D FOOT B/L FACE –
A
+
A28AIR VENT MODECONTROL SERVOMOTOR
A 5A/C MAGNETICCLUTCH
1718192021
Y–B
P–B
R–L
G–W
G–B
W–B
B–R
B–R
CONTROLCIRCUIT
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
3 421
(Cont. next page)
P ow er S ource
30 TOYOTA TACOMA
T
W–R
B–Y
E ng ine Con trol (5V Z –FE E xcep t 2W D M /T)
2
ACC
IG1
ST1
IG2
AM1
B–R
4
67 AM2
1
2
3
5
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2
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1 IK2
1
2
1
2
1
2
1
2
1
2
1
2
EA IG
SG
R
IF115
3E11F5
1I2
IK2
3 BN7
EB
V–R
SIL
W–R
WV
B–Y
B–Y
B–R
B–R
W–B
B–R
W
B–R
B–Y
V
B–Y
B–Y
B–W
W–R
B–R B–R B–R
W–R
B
I11IN
JECTO
R N
O. 6
RL–R
W–L
LB
–R
B–R
B–R
B–R
B–R
B–R
W–B
W–B
W–B
B–Y
W–R
W–R
B–Y
W–B
W–R
VV
B–R
BR
W–B
B–W 4 5 7
3 2
5 1
16
W
W–L
W–R
B
R
Around therightedge of thereinforcement
L–R
W–L
IE
L
BR
BR
I10IN
JECTO
R N
O. 5
I 9INJEC
TOR
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. 4
I 8INJEC
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I 7INJEC
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I 6INJE
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R N
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Around the leftedge of thereinforcement
BATTERY
Front left fender
10AGAUGE
C 6
CIR
CU
IT OP
ENIN
GR
ELAY
Near thethrottle body
B–Y
1
22
2 1
2
121
1
O
C
N
E
F
M
G
I
K
L
P
Q
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ICATO
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TER
]
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DB–O
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W
3E4
7 IF1
3D19
3D20
3A15
3A165 BN7
5
4
M
13 BN7F 8FU
EL PU
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LL
W–R
L
W–L
W–R
W–R
W–R
W–R
W–R
WFrom
Center A
irbagSensor A
ssembly
<17–2>
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WW–B
3E2
3E3
13 IK2
W–R
W–R
W–R
9
5
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B–W 12 IF1
TS
From A
BS A
ctuatorw
ith EC
U<
16–4>R
–Y
14
WFSE
15
Y–R
B
BB
J11JUNCTIONCONNECTOR
AB–W
Y–RJ
23
W–B
W–B
W–R
Y–B
W–R
W–RA/B
6
From C
enter Airbag
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bly<
17–3>
Y
D 7DATA LINKCONNECTOR 3
C
C C C
J11JUNCTIONCONNECTOR13
TC
Y–B
Y–B
From AB
SA
ctuator with
EC
U<
16–4>
From C
enterAirbag S
ensorAssem
bly<
17–3>
Y–B
W–R
Y–B
SB–R(M/T)
B–R
3D13
(M/T )
From AB
SEC
U<
16–4>
W
HB–R
3D
B–R
16
2003 TOYOTA TACOMA (EWD517U)
M
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
G
7 865
#30
R BRBR
2
N
V 4VS
V(EV
AP )
O
P
K
Q
2
1
1 EE1
2
1
ENGINE CONTROL MODULE
2
7 C 1 A 3 B 16 A 10 D 12 D 13 D
W–R
11 D 18 D 15 D 25 D 20 C 2 C 11 C 10 C
13 A A2 22 A 6 C 5 C 4 C 3 C 1 C C8 14 D 19 C
D24 9 C 9 A 3 A 13 B 2 B 7 A 20 A
1 ED1 3 ED1 2 ED1
EB
29 D 27 D 23 D 22 D 6 A 17 C 4 D 5 D D7
1
Y–B
W–R
Y–G
R
B–Y
B–W G Y–G
L–B
G–R
BR–B
L–B
L–B
Y
G–Y
W–G
L–B
W–R
W–R
B–Y
W–R
2 3 4
1 5
V–R
W–L
W–R
B R L–R
W–L
L
#40 #50
From 4W
D Indicator Light
<21–2>
#60
W–R
AF1+W
–RHAF1
W–R
HT2B
Y–R
OX2B KNK1
W–L
KNK2
W–R
B
SP1
R
E1
L–R
E01
W–L
E02
L
T 1THROTTLEPOSITIONSENSOR
4
42
3 1
1
3
B–Y
B–L
LG–R
B–W
L–Y
L–B
G–B
GR G
G–W
1
E ng ine Contro l (5V Z– FE E xcep t 2W D M /T )
1
3 2
V 8VA
PO
RPR
ESS
UR
E SE
NSO
R
G–Y
B GR
G–Y
R
R–W
R–Y
P–L
V
B GR
G–B
G–O
W–R
W–B
W–B
W–R
W–B
BR
M
BR
W–B
W–B
BR
L–B
BR
M 1
MAS
S AIR
FLOW
ME
TER
L–B
G–R
From ”
STA
”Fuse<
1–3>
V12VS
V(Pressure S
witching
Valve )
(*1 A/T )
TC +B NSW BATT E2G VG THA E2 THW VTA VC TBP
A23AIR
FUE
L RA
TIO SE
NSO
R(B
ank 1 Sensor 1 )
EVPB
R
EE12
BR
PTNK
14
(*3 )
C
From Igniter<1–4>
From A/CControlAssembly<29–6>
T
To Detection S
W(Transfer L4 P
osition )<
20–2><
21–4>
From C
lutch Start S
W(M
/T )or P
ark/Neutral Position
SW
(A/T )<
1–2>
From S
top Light SW
<15–4>
L
E1
IGF IGT1 IGT2 IGT3 AC1 ACT 4WD L4 STA STP
(Shielded )
(Shielded )
(Shielded )
J
(Shielded )
(Shielded )
(Shielded )
K 2
KN
OC
K S
ENS
OR
1
K 3
KN
OC
K S
ENS
OR
2
F
C
W–R
30 TOYOTA TACOMA (Cont’ d)
WFSE E03W FC #10
* 3 : 4WD w/o 2–4 Select SW
(A/T )
#20
To Speedom
eter[C
omb. M
eter]<
27–2><
28–2>
BR
E 3EN
GIN
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OLA
NT
TEM
P. SEN
SOR
3 4
1
18 C
PSW
1B
P10PO
WER
STE
ERIN
GO
IL PR
ES
SUR
E S
W
, E 7E 6 B C , E 8 D , E10 E
BR
BR
BR
Y–B
B
D
23 IF1
4 A 15 A
W–R
B–O
MREL
26 D
AF1–
P
P
8 D
E04
W–B
BR
5 IK2
U
26 BN7
G–B
W–GR
–Y
W–R
B–O
B–O B–W
IGSW
14 IK2
(Shielded)
(Shielded )
V
(Shielded )
W–B
W–B
V
To AD
D D
etection SW
<20–3>
G–B
* 2 : 4WD w/ 2–4 Select SW* 1 : 4WD
(*2 )
AB–W
BN725
L–B
IK68 IK61
23 BN724 BN7
R–Y
G–Y
14 A 21 D
W
2
V11VS
V(C
anisterC
losed Valve )
12 IK2 22 IK2
(Shielded )
R
H 9
HE
ATED O
XY
GE
N SE
NSO
R(Bank 1 S
ensor 2 )
WI
IK62
G–B
1
R–W
SIL CCV
IK225
W–R
L–B
18 IK2
B–R(M/T)S
1
2
25 B
D
B–W
(M/T )
C16
CR
UIS
E CO
NTR
OL
CLU
TCH
SW
B–R
, E 5 A
(Cont. next page)
4 E
V
VTA2
2
E
GR
15 E
L–B
L
G–Y
A29ACCELSENSOR
VPA2
4 1
2
VPA
10
3
L–BL–B
D6
ME01
W–B
W–B
CBR
(M/T )
HB–R
G–Y
A
B
B–W B–W B–W
B–R
Near thethrottle body
DBR
See Electronically
Controlled
Transmission
System
<12–4>
(A/T )
2003 TOYOTA TACOMA (EWD517U)
M OVERALL ELECTRICAL WIRING DIAGRAM
2003 TOY
OTA
TAC
OM
A (E
WD
517U)
9 10 11 12
30 TOYOTA TACOMA (Cont’ d)
(Shielded )
(Shielded )
12 C 21 C 13 C
L G
G R
1 2 2 1
G
C 2CRANKSHAFTPOSITIONSENSOR
C 1CAMSHAFTPOSITION SENSOR
NE+ NE– G2
BR
17 D
GE01
9 D 31 D 8 E E2
M+ M– CL– CL+
12 4 3
T 7THROTLE CONTROL MOTOR
(Shielded )
GR L
BR
Y
BR
(Shielded )
CBR
E 5 E 6,
ENGINE CONTROL MODULE
A B E 7, C E 8, D E10, E
C ru ise C on trol (5V Z –FE E xcep t 2W D M /T)
A
B
D
CR
UIS
E
RES/ACC
SET/COAST
CANCEL
4
5
C19
CR
UIS
E C
ON
TRO
L SW
[CO
MB
. SW
]
CCS
22 B
19 IK2
BR
BR
G–Y
CCS
B–W
B–R
8
1
4
3
17 A 9 B
PI ST1–
L–W
L–OB–R
B–W
C13
CR
UIS
E CO
NTR
OL
IND
ICA
TOR
LIGH
T[C
OM
B. M
ETE
R]
S 5STO
P LIG
HT S
W
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