
VSC
FROM POWER SOURCE SYSTEM (SEE PAGE 52)
1 1 1
60A 25A 25A
ABS ABS NO. 3 ABS NO. 2
2 2 2
7 7 7
W- G
W
W R- B
R- B
GR- R
7 7 8 8
M4
GR- R
1 3 4 1 MASTER CYLINDER
PRESSURE SENSOR
ABS MTR
ABS SOL
2
RELAY
RELAY
2 4 5 3
9 ED1 11 ED1 1 2 3
7 7 8 8 8
GR- R
BR- Y
W- G
R- W
R- L
V14
L
57 51 9 8 7 VSC ECU
R+ BATT E2 PMC VCM
GR- L
W- B
W- L
7
Y
L
1
SR MR MT SFLH SFLR SFRH SFRR SRLH
5A ABS NO. 4
36 62 82 60 58 81 55 53
GR- L
L- W
Y
W- G
W- R
B- W
G- O
Y- B
2
7 8 ED1 3 ED1 4 ED1
7 ED1
15 7 12 1 10
GR- L
W- B
L- W
L- W
SFLH SFLR SFRH SFRR SRLH
Y
BS
2 V8
VSC ACTUATOR
W- L
5 ED1
W- L
L
W- B
ED
2001 SIENNA (EWD420U)
174
FROM POWER SOURCE SYSTEM (SEE PAGE 52) B- R
GR
15A 10A 15A
STOP GAUGE ECU- IG
* 1 : SHIELDED
7 1C 2 1D 6 1A
B- R
GR
R- B R- B
CONNECTOR
A
JUNCTION
A GR
W
J17 A
G- W GR GR
2
18 3B 5 1R
S6
STOP LIGHT
SW
1
17 3B 4 1R
G- W
G- W
V14
48 VSC ECU
STP
SRLR SRRH SRRR SRC1 SRC2 SMC1 SMC2 FL+ FL-
80 61 59 54 52 49 50 64 65
(* 1) (*1)
GR- R
LG- B
V- W
B- O
Y- G
L- Y
(* 1)
LG
P
L
3 9 4 8 11 14 13
SRLR SRRH SRRR SRC1 SRC2 SMC1 SMC2
M
BM GND
V8 6 5
VSC ACTUATOR
(* 1)
L
6 ED1
SENSOR FRONT LH
1
W- B
ABS SPEED
L
A6
2
L
BR
I3
IG
2001 SIENNA (EWD420U)
175
VSC
B- R B- R B- R
GR GR
GR
8 3A 17 3A
7 3A 18 3A
R- B R- B
BR
GR
C 9 B , C10 A , C11 C
D COMBINATION METER 16 A
B- R
B- R
GR D D GR 9
A
J18 2
VSC BUZZER
TRAC OFF
JUNCTION
BUZZER
BRAKE
CONNECTOR
SLIP
VSC
ABS
V13
SPEEDOMETER 1
4 B 6 B 5 C 10 A 12 A 5 B
R- G
GR- R
Y- R
L- O
R- L
L- B
R
V14
VSC ECU 12 31 23 11 10 56 28
VSCW IND WA WT SP1 IG1 BZ
FR+ FR- RL- RL+ RR+ RR- GND1
72 71 69 68 66 67 83
(*1) (* 1) (* 1) (*1)
I3
(* 1)
(* 1)
(* 1)
(* 1)
BR
W
G
R
Y
B
BR
BR
9 IC2
I2
(* 1)
4 IK5 7 IK5 3 IK5 11 IC2 3 IC2 2 IC2 10 IC2
(*1)
B6
(* 1)
(* 1)
(* 1)
BR
W
G
R
Y
B
BR- W
BR- W
6 BA2 2 BA2 8 BA2 9 BA2 7 BA2 10 BA2
(* 1)
G
R
(*1)
BR
W
B
SENSOR FRONT RH
SENSOR REAR RH
SENSOR REAR LH
1 1 2
ABS SPEED
ABS SPEED
ABS SPEED
A17
A18
A7
2 2 1
BR BR BR
I2
BR
ED
2001 SIENNA (EWD420U)
176
B- R B- R
GR GR
GR GR
* 1 : SHIELDED
P- B P- B
R- B R- B
BR
13 R- Y
CONNECTOR 3
TC 17 18
P- B P- B
DATA LINK
IH2 IH2 I2
R- Y
R- Y
SIL TS V
R- Y
P- B
P- B
P- B
D3
7 14
B LG
R
CONNECTOR
CONNECTOR
B 16 11 F
R- Y
JUNCTION
JUNCTION
CONNECTOR
B TS TC F Y- G
JUNCTION
B
GR- G
J17
J18
F
J6
B B
GR- G
Y- G
P- B
(* 1)
D1
LG
R- Y
V
R
DATA LINK CONNECTOR 1
R R
46 42 26 2 1 3 16 40
D/G TS TC FSS SS1 SS2 PKB LBL
GL1 YGND YAW YD GYAW YIGA CSW GND2 EBDW
73 20 19 17 18 34 44 29 32 V14
VSC ECU
(*1)
R- W
(* 1)
GR
BR
BR
W
G
R
B
Y
L
15 IC3 14 IC3 9 IC3 7 IC3 2 IC3 8 IC3 6 IC3
(* 1)
W
G
R
B
Y
L
5 6 4 2 1 3 2
TRAC OFF SW
GL1 GNDA YAW2 YD GYW2 IGA 10 2J 4 ID1
T9
1 4 2F
Y1
YAW RATE SENSOR
W- B
BR
BR
R- W
BR BR
I2
EA IH
2001 SIENNA (EWD420U)
177
VSC
B- R FROM POWER SOURCE SYSTEM (SEE PAGE 52)
GR
GR R- L
15A
CIG
A/T INDICATOR LIGHT
2
SW [PARK/NEUTRAL
C
POSITION SW]
PL DL 1 1J
7 10
P1
GR
G- W
P
B- R
1
R- B R- B R- B
ED1
3 1
DIODE [PARK/NEUTRAL
10 IH2 7 IH2
R- Y
P- B
G- W
B- R
POSITION SW]
V
2
13 3B 3 3D
R- L
D12
LG
Y- G 7 IH1
11 3A 13 3D
GR- G R- L
G- W
Y- G
B- R
B- R
R- Y
P- B
LG
V
T10
R 25 15 17 4 21 24 1 10 12 TRANSLATE ECU
LBL PKB VSC- VSC+ TC TS IG1 P D
BRL GND LVL2 PKB2
16 14 11 2
R- W
Y- R
BR
R
D
R D J8
JUNCTION 8 3B
CONNECTOR
D
9 3B
GR
R
Y- R
ACTIVE LIGHT RELAY
2 3
IG1 BRL
1 1
B1 P3
BRAKE FLUID PARKING
LEVEL WARNING SW BRAKE SW
A30
EBDW E
8 4 2
R- W
W- B
BR
BR
A B
J2 A , J3 B
JUNCTION
CONNECTOR
A A
R- W
BR BR BR BR
I2 I2
W- B
IJ
2001 SIENNA (EWD420U)
178
* 1 : SHIELDED
R- B
R- B
BR
6 5
C15 IG ESS S24
CRUISE CONTROL STEERING
ECU SENSOR
D SS1 SS2
3 7 1
W- R
(*1)
BR
Y
26 5 18 6
CCS SS1 SS2 RSS
NEO ENG+ ENG- TRC+ TRC-
13 22 9 20 7 T10
TRANSLATE ECU
L- W
Y- B
W
G
O
16 B 14 A 21 A 13 A 20 A
NEO ENG+ ENG- TRC+ TRC-
E8 A , E9 B
ENGINE CONTROL MODULE
BR
2001 SIENNA (EWD420U)
179
VSC
SYSTEM OUTLINE
The vehicle could be in an extreme over steering or under steering tendency due to unexpected accidents, road conditions,
vehicle speed, or by other external factors. In such a case, this system automatically controls the engine output and the
braking to each wheel, to decrease the extreme over steering and under steering.
To decrease extreme over steering tendency
When the system determines that the over steering tendency is large, the system applies brakes to the outer wheels
according to the degree of over steering, and creates a moment towards the outer side of the vehicle, to decrease the
tendency of over steering. Also, when the brakes are applied, the vehicle speed decreases while the stability increases.
To decrease extreme under steering tendency
When the system determines that the under steering tendency is large, the system applies brakes to the front or rear wheels
according to the degree of under steering, to decrease the tendency of under steering.
TRAC OFF SW
The SW to send the VSC system into OFF mode. When the SW is pushed after starting the engine, the system will be in
OFF mode, and the TRAC OFF indicator light will turn on. When the SW is pushed again, the system will be in standby
mode. When the engine is stopped and re-started, regardless of the TRAC OFF SW, the system will be in standby mode.
Information to the driver
The VSC system informs the driver when the tire grip is about to exceed its grip capacity, by blinking the slip indicator light
and turning on the buzzer. Accordingly, the driver is informed to drive more gently.
SERVICE HINTS
V14 VSC ECU
51-GROUND : Always approx. 12 volts
56-GROUND : Approx. 12 volts with the ignition SW at ON position
83, 29-GROUND : Always continuity
T10 TRANSLATE ECU
1-GROUND : Approx. 12 volts with the ignition SW at ON position
14-GROUND : Always continuity
A6, A7 ABS SPEED SENSOR FRONT LH, RH
1-2 : 1.5 - 1.7 k (20