Page 1153 of 4323

F16952
VYS
SS1
GYAW S1
23 R
B
W
IM BRIL112
1911
3
12 Y1
Yaw Rate (Deceleration)
SensorABS & VSC Actuator
(Skid Control ECU)
(Shielded)S1
S1
(Shielded) VYS
YAW 1
GYAWR
B
W
SS2
S1 24 IL1
IL1
IL1
IL143
11
10 G
G YAW 2
5(*)
(*)
(*) CAN2 Circuit(*)
(*)
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±951
1145 Author: Date:
2005 SEQUOIA (RM1146U)
DTCC1232 / 32, C1244 / 44Deceleration Sensor Circuit
CIRCUIT DESCRIPTION
The skid control ECU receives signals from the yaw rate sensor (deceleration sensor) via the CAN2 commu-
nication system.
The yaw rate sensor has a built±in deceleration sensor.
This sensor detects deceleration on the vehicle. The sensor signal is used in ABS & BA & TRAC & VSC
control.
DTC No.DTC Detecting ConditionTrouble Area
C1232 / 32When the lateral deceleration output becomes 4.8 V or
more or 0.2 V or less per 0.5 second.Yaw rate (Deceleration) sensor
Yaw rate (Deceleration) sensor circuit
C1244 / 44
When any of the following conditions are detected:
1. When the supplied voltage to the yaw rate & decelera-
tion sensor becomes 18 V or more or 6.5 V or less.
2. When the longitudinal deceleration output becomes 4.8
V or more or 0.2 V or less per 0.5 second.
Yaw rate (Deceleration) sensor
Yaw rate (Deceleration) sensor circuit
WIRING DIAGRAM
DIDM8±01
Page 1154 of 4323

F19784
Torque: 5 N´m (10 kgf´cm, 3.7ft´lbf)
F19199
DI±952
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1146 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check the yaw rate (deceleration) sensor installation.
CHECK:
Check the yaw rate (deceleration) sensor installation.
OK:
The sensor should be tightened to the specified
torque.
The sensor should not be tilted.
NG Install yaw
rate (deceleration) sensor correctly.
OK
2 Check output value of the yaw rate sensor.
PREPARATION:
(a) Remove the 2 bolts and the yaw rate (deceleration) sen-
sor assembly with the connector still connected.
(b) Connect the hand±held tester to the DLC3.
(c) Turn the ignition switch to the ON position and push the
hand±held tester main switch ON.
(d) Select DATA LIST mode on the hand±held tester.
CHECK:
Check that the decelerate value of the deceleration sensor dis-
played on the hand±held tester changes: Place the decelera-
tion sensor vertically to the ground and turn the sensor to the
frontward and rearward.
ItemMeasurement Item /
Range (Display)Normal ConditionDiagnostic Note
DECELERAT SENS
Deceleration sensor 1
reading / min.: ±1.869 G,
max.: 1.869 GApproximately 0 ± 0.13 G
while stationaryReading changes when ve-
hicle is bounced
DECELERAT SENS2
Deceleration sensor 2
reading / min.: ±1.869 G,
max.: 1.869 GApproximately 0 ± 0.13 G
while stationaryReading changes when ve-
hicle is bounced
OK:
Decelerate value changes.
NG Replace yaw rate (deceleration) sensor.
NOTICE:
When replacing the yaw rate (deceleration) sensor, per-
form the zero point calibration (See page DI±897).
OK
Page 1155 of 4323
F19145
Yaw Rate (Decel-
eration) Sensor
VYS
GYAW
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±953
1147 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check voltage between terminals VYS and GYAW of the yaw rate (deceleration)
sensor.
PREPARATION:
Disconnect the yaw rate (deceleration) sensor connecter.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage between terminals VYS and GYAW
of the yaw rate (deceleration) sensor harness side con-
nector.
OK:
Voltage: 10 to 14 V
OK Check and replace yaw rate
(deceleration)
sensor.
NOTICE:
When replacing the yaw rate sensor, perform the zero point
calibration (See page DI±897).
NG
4 Check for open and short circuit in harness and connector between yaw rate
sensor and skid control ECU (See page IN±35).
NG Repair or replace harness or connector.
OK
Replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).
Page 1156 of 4323

F16952
VYS
SS1
GYAW S1
23 R
B
W
IM BRIL112
1911
3
12
(Shielded)S1
S1
(Shielded) VYS
YAW 1
GYAWR
B
W
SS2
S1 24 IL1
IL1
IL1
IL14 3
11
10 G
G YAW 2
5ABS & VSC Actuator
(Skid Control ECU) Y1
Yaw Rate (Deceleration)
Sensor
(*)
(*)
(*) CAN2 Circuit(*)
(*) DI±954
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1148 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1234 / 34 Malfunction in Yaw Rate Sensor
CIRCUIT DESCRIPTION
Yaw rate sensor detects the vehicle's sideslip and sends signals to the skid control ECU.
DTC No.DTC Detecting ConditionTrouble Area
C1234 / 34
When any of the following conditions are detected:
1. Power output of 4.65 V or more or 0.25 or less continues
for 0.1 sec. or more.
Yaw rate (deceleration) sensorC1234 / 34for 0.1 sec. or more.
2. Difference between the actual output value of the yaw
rate sensor and the output value calculated from the
other sensor's continues to be large.Ya w rate (deceleration) sensor
Yaw rate (deceleration) sensor circuit
WIRING DIAGRAM
DIDM9±01
Page 1157 of 4323

F19784
Torque: 5 N´m (10 kgf´cm, 3.7ft´lbf)
F16996
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±955
1149 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check the yaw rate sensor installation.
CHECK:
Check the yaw rate sensor installation.
OK:
The sensor should be tightened to the specified
torque.
The sensor should not be tilted.
NG Install yaw
rate sensor correctly.
OK
2 Check output value of the yaw rate sensor.
PREPARATION:
(a) Remove the 2 bolts and the yaw rate sensor assembly
with the connector still connected.
(b) Connect the hand±held tester to the DLC3.
(c) Turn the ignition switch to the ON position and push the
hand±held tester main switch ON.
(d) Select the DATA LIST mode on the hand±held tester.
CHECK:
Check that the yaw rate value of the yaw rate sensor displayed
on the hand±held tester changes: Place the yaw rate sensor
vertically to the ground and turn the sensor to the right and left.
ItemMeasurement Item /
Range (Display)Normal ConditionDiagnostic Note
YAW RATE
Yaw rate sensor/
Min.: ±128 deg/s, Max.:
127 deg/sMin.: ±128 deg/s
Max.: 128 deg/s±
OK:
Yaw rate value changes.
NG Replace yaw rate sensor.
NOTICE:
When replacing the yaw rate sensor, perform the zero point
calibration (See page DI±897).
OK
Page 1158 of 4323
F19145
Yaw Rate Sensor
VYS
GYAW
DI±956
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1150 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check voltage between terminal VYS and GYAW of the yaw rate sensor.
PREPARATION:
Disconnect the yaw rate sensor connecter.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage between terminal VYS and GYAW
of the yaw rate sensor harness side connector.
OK:
Voltage: 10 to 14 V
OK Check and replace yaw rate sensor.
NOTICE:
When replacing the yaw rate sensor, perform the zero point
calibration (See page DI±897).
NG
4 Check for open and short circuit in harness and connector between yaw rate
sensor and skid control ECU (See page IN±35).
NG Repair or replace harness or connector.
OK
Replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).
Page 1159 of 4323
F19782
Battery16
S1+BS
GND1
GND2
+BM S1
S1 S1 47
1
32 B±R
B±R
W±B
W±B W±B W±B 5 BF10
Fusible Link BlockABS & VSC Actuator
(Skid Control ECU)
IG J18
J/C
A A3
ABS
Motor Relay
Pump
Motor IL117
IL19
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±957
1151 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1241 / 41 Power Source Circuit
CIRCUIT DESCRIPTION
If there is a problem with the skid control ECU power supply circuit, the skid control ECU outputs DTC and
prohibits operation under the fail safe function.
DTC No.DTC Detecting ConditionTrouble Area
C1241 / 41
When any of the following conditions are detected:
1. ECU terminal +BM/+BS voltage is too low for a fixed
time during driving.
2. ECU terminal +BM/+BS voltage is too high for a fixed
time while ignition switch is ON.Battery
Charging system
Power source circuit (+BM, +BS)
Skid control ECU
WIRING DIAGRAM
DIDMA±01
Page 1160 of 4323
DI±958
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1152 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check ABS fuse.
PREPARATION:
Remove the ABS fuse from the fusible link block.
CHECK:
Check continuity of the ABS fuse.
OK:
Continuity
NG Check for short circuit in all the harnesses and
components connected to ABS fuse (See at-
tached wiring diagram).
OK
2 Check battery positive voltage.
OK:
Voltage: 10 to 14 V
NG Check and repair the charging system
(See page CH±1).
OK