YAW connector TOYOTA SEQUOIA 2001 Service Repair Manual

DIDLU±01
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±891
1085 Author: Date:
2005 SEQUOIA (RM1146U)
ABS WITH EBD & BA & TRAC & VSC SYSTEM
PRECAUTION
NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.
System NameSee Page
Back Door Power Window Control SystemBE±77

When there is a malfunction in the contact point of the terminals or installation problems with
parts, removal and installation of the suspected problem parts may return the system to the
normal condition either completely or temporarily.

In order to determine the malfunctioning area, be sure to check the conditions at the time the
malfunction occurred, such as by DTC output and freeze frame data output, and record it before
disconnecting each connector or removing and installing parts.

Since the ABS with EBD & BA & TRAC & VSC systems may be influenced by a malfunction in
the other systems, be sure to check for DTCs in the other systems.

Be sure to remove and install the ABS & VSC actuator and each sensor with the IG switch OFF
unless specified in the inspection procedure.

When removing and installing the ABS & VSC actuator and each sensor, be sure to check that
the normal display is output in test mode inspection and in DTC output inspection after instal-
ling all the parts.

After replacing the yaw rate sensor and/or the ABS & VSC actuator assembly, make sure to per-
form yaw rate and deceleration sensors' zero point calibration
(See page DI±897).

The CAN communication system is used for data communication between the skid control ECU
(included in the actuator), the steering angle sensor, and the yaw rate sensor (the deceleration
sensor is included). If there is trouble in the CAN communication line, the DTC of the commu-
nication line is output.

If the DTC of the CAN communication line is output, repair the malfunction and troubleshoot
the ABS with EBD & BA & TRAC & VSC systems.

Since the CAN communication line has its own length and route, it can not be repaired tempo-
rarily with the bypass wire, etc.

F19198
Skid Control ECU
(harness side connector) DI±908
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1102 Author: Date:
2005 SEQUOIA (RM1146U)Symbols (Terminal No.) Terminal Description
TS (40)Sensor check input
+BO (41)Steering angle sensor line
RL+ (42)RL wheel speed signal line
RL± (43)RL wheel speed signal line
VSCW (44)VSC OFF indicator output
FR± (45)FR wheel speed signal line
FR+ (46)FR wheel speed signal line
+BS (47)Solenoid relay power supply
2. Terminal Inspection
Disconnect the connector and measure the voltage on the wire harness side.
HINT:
Voltage can not be measured with the connector connected to the skid control ECU as the connector is water
resistance.
Symbols (Terminal No.)Wiring ColorTerminal DescriptionConditionSpecified Condition
+BM (16) ± GND1, 2 (1, 32)B±R ± W±BMotor relay power supplyIG switch ON10 to 14 V
GYAW (24) ± GND1, 2 (1, 32)G ± W±BYaw rate sensor groundAlwaysBelow 1 W
E3 (8) ± GND1, 2 (1, 32)L ± W±BM/C pressure sensor 3
groundAlwaysBelow 1 W
E2 (27) ± GND1, 2 (1, 32)W ± W±BM/C pressure sensor 2
groundAlwaysBelow 1 W
E1 (29) ± GND1, 2 (1, 32)W ± W±BM/C pressure sensor 1
groundAlwaysBelow 1 W
STP (39) ± GND1, 2 (1, 32)G±Y ± W±BStop light switch signal in-
putBrake pedal depressed8 to 14 V
STP (39) ± GND1, 2 (1, 32)G±Y ± W±BStop light switch signal in-
putBrake pedal releasedBelow 1.5 V
+BS (47) ± GND1, 2 (1, 32)B±R ± W±BSolenoid relay power sup-
plyIG switch ON10 to 14 V

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

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).

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

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).

F19145
Yaw Rate
(Deceleration)
Sensor
VYS
GYAW
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±989
1183 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check yaw rate (deceleration) sensor.
PREPARATION:
Disconnect the yaw rate (deceleration) sensor connector.
CHECK:
(1) Turn the ignition switch to the ON position.
(2) Measure the voltage between terminal GYAW and
VYS of the harness side connector.
OK:
Voltage: 10 to 14 V
NG Go to step 4.
OK
Replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform zero point calibration (See page DI±897).
4 Check for open and short circuit in harness and connector between master cyl-
inder pressure sensor No. 1, master cylinder pressure sensor No. 2, yaw rate
(deceleration) 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 zero point calibration (See page DI±897).

F19145
Yaw Rate
(Deceleration)
Sensor
STS
DI±992
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1186 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check voltage between terminal STS of brake pedal force switch and body
ground.
PREPARATION:
Disconnect the brake pedal force switch connector.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage between STS of brake pedal force
switch harness side connector and body ground.
OK:
Voltage: About 6 V
NG Go to step 3.
OK