2007 TOYOTA SIENNA brake rotor

BC–24BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM
BC
OK
(a) Clear the DTCs (See page BC-10).
(b) Drive the vehicle at a speed of approximately 32 km/h
(20 mph) or more for 60 seconds or more.
(c) Check that the same DTCs are recorded (See page BC-
10).
HINT:
Reinstall the sensors, connectors, etc. and restore the
vehicle to its prior condition before rechecking for DTCs.
Result
B
C
A
(a) Turn the ignition switch off.
(b) Remove the front drive shaft (See page DS-5).
(c) Check the rotor.
OK:
No scratches, oil, or foreign matter on the rotors.
NOTICE:
Check the speed sensor signal after cleaning or
replacement (See page BC-3).
NG
OK
8RECONFIRM DTC
Condition Proceed to
DTCs (C0200/31, C0205/32, C1235/35 and C1236/36) are output A
DTCs (C0200/31, C0205/32, C1235/35 and C1236/36) are not
output (When troubleshooting in accordance with the DTC
CHART)B
DTCs (C0200/31, C0205/32, C1235/35 and C1236/36) are not
output (When troubleshooting in accordance with the PROBLEM
SYMPTOMS TABLE)C
END
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
9INSPECT SPEED SENSOR ROTOR
R000948
CLEAN OR REPLACE DRIVE SHAFT
ASSEMBLY
REPLACE BRAKE ACTUATOR ASSEMBLY

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–75
BC
4. SPEED SENSOR CHECK (WHEN USING
INTELLIGENT TESTER):
(a) Check the backward signal.
(1) Drive the vehicle in reverse for more than 1
second at 3 km/h (2 mph) or higher.
HINT:
Drive the vehicle in reverse and check the speed
sensor signal. Note that the signal check cannot
be completed if the vehicle speed is 45 km/h (28
mph) or more.
(b) Check the forward signal.
(1) Drive the vehicle straight forward. Drive the
vehicle at a speed of 45 km/h (28 mph) or higher
for several seconds and check that the ABS
warning light goes off.
HINT:
The signal check may not be completed if the
vehicle has its wheels spun or the steering
wheel turned during this check.
(c) Stop the vehicle.
5. YAW RATE SENSOR CHECK (WHEN USING
INTELLIGENT TESTER):
(a) Check the output of the yaw rate sensor.
(1) Move the shift lever to the D position, drive the
vehicle at a speed of approximately 5 km/h (3
mph), and turn the steering wheel either to the
left or right 90
or more until the vehicle makes a
180
turn.
(2) Stop the vehicle and move the shift lever to the P
position. Check that the skid control buzzer
sounds for 3 seconds.
HINT:
• If the skid control buzzer sounds, the signal
check is completed normally.
• If the skid control buzzer does not sound,
check the skid control buzzer circuit, then
perform the signal check again.
• If the skid control buzzer does not sound yet,
there is a malfunction in the VSC sensor, so
check the DTC.
• Make 180
turn. At the end of the turn, the
direction of the vehicle should be within 180

+- 5
of its start position.
• Do not spin the wheels.
6. DTC OF TEST MODE (SIGNAL CHECK) FUNCTION
ABS sensor:
BR03904E40
DTC Code Detection Item Trouble Area
C1271/71 Low output signal of front speed sensor RH• Front speed sensor RH
• Sensor installation
• Speed sensor rotor
C1272/72 Low output signal of front speed sensor LH• Front speed sensor LH
• Sensor installation
• Speed sensor rotor

BC–76BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
VSC sensor:
HINT:
The codes in this table are output only in Test Mode
(signal check).
7. SENSOR SIGNAL CHECK BY TEST MODE (SIGNAL
CHECK) (WHEN USING SST CHECK WIRE):
(a) When having replaced the skid control ECU and/or
yaw rate and deceleration sensor, perform zero
point calibration of the yaw rate and deceleration
sensor.
HINT:
• If the ignition switch is turned from the ON
position to the ACC or off during test mode
(signal check), DTCs of the signal check function
will be erased.
• During test mode (signal check), the skid control
ECU records all DTCs of the signal check
function. By performing the test mode (signal
check), the codes are erased if normality is
confirmed. The remaining codes are the codes
where an abnormality was found.
(b) Procedures for test mode.
(1) Turn the ignition switch off.
(2) Check that the steering wheel is in the
straightahead position and move the shift lever
to the P position.
C1273/73 Low output signal of rear speed sensor RH• Rear speed sensor RH
• Sensor installation
• Speed sensor rotor
C1274/74 Low output signal of rear speed sensor LH• Rear speed sensor LH
• Sensor installation
• Speed sensor rotor
C1275/75Abnormal change in output signal of front speed sensor
RHSpeed sensor rotor
C1276/76Abnormal change in output signal of front speed sensor
LHSpeed sensor rotor
C1277/77Abnormal change in output signal of rear speed sensor
RHSpeed sensor rotor
C1278/78Abnormal change in output signal of rear speed sensor
LHSpeed sensor rotor
C1279/79 Acceleration sensor output voltage malfunction• Yaw rate and deceleration sensor
• Sensor installation
C1281/81 Master cylinder pressure sensor output malfunction• Stop light switch
• Master cylinder pressure sensor
DTC Code Detection Item Trouble Area
C0371/71 Yaw rate sensor Yaw rate and deceleration sensor DTC Code Detection Item Trouble Area

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–79
BC
• If the skid control buzzer does not sound yet,
there is a malfunction in the yaw rate sensor,
so check the DTC.
• Make a 180
turn. At the end of the turn, the
direction of the vehicle should be within 180
+- 5
of its start position.
• Do not spin the wheels.
11. DTC OF TEST MODE (SIGNAL CHECK) FUNCTION
ABS sensor:
VSC sensor:
HINT:
The codes in this table are output only in Test Mode
(signal check).
DTC Code Detection Item Trouble Area
C1271/71 Low output signal of front speed sensor RH• Front speed sensor RH
• Sensor installation
• Speed sensor rotor
C1272/72 Low output signal of front speed sensor LH• Front speed sensor LH
• Sensor installation
• Speed sensor rotor
C1273/73 Low output signal of rear speed sensor RH• Rear speed sensor RH
• Sensor installation
• Speed sensor rotor
C1274/74 Low output signal of rear speed sensor LH• Rear speed sensor LH
• Sensor installation
• Speed sensor rotor
C1275/75Abnormal change in output signal of front speed sensor
RHSpeed sensor rotor
C1276/76Abnormal change in output signal of front speed sensor
LHSpeed sensor rotor
C1277/77Abnormal change in output signal of rear speed sensor
RHSpeed sensor rotor
C1278/78Abnormal change in output signal of rear speed sensor
LHSpeed sensor rotor
C1279/79 Acceleration sensor output voltage malfunction• Yaw rate and deceleration sensor
• Sensor installation
C1281/81 Master cylinder pressure sensor output malfunction• Stop light switch
• Master cylinder pressure sensor
DTC Code Detection Item Trouble Area
C0371/71 Yaw rate sensor Yaw rate and deceleration sensor

BC–90BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If a malfunction code is displayed during the DTC check,
check the circuit indicated by the DTC. For details of each
code, turn to the page for the respective "DTC Code" in the
DTC chart.
DTC chart of ABS:
DTC Code Detection Item Trouble Area See page
C0200/31Right Front Wheel Speed Sensor
Signal1. Right front speed sensor
2. Speed sensor circuit
3. Speed sensor rotor
4. Sensor installationBC-92
C0205/32 Front Speed Sensor LH Circuit1. Left front speed sensor
2. Speed sensor circuit
3. Speed sensor rotor
4. Sensor installationBC-92
C0210/33Right Rear Wheel Speed Sensor
Signal1. Right rear speed sensor
2. Speed sensor circuit
3. Speed sensor rotor
4. Sensor installationBC-98
C0215/34 Rear Speed Sensor LH Circuit1. Left rear speed sensor
2. Speed sensor circuit
3. Speed sensor rotor
4. Sensor installationBC-98
C0226/21 SFR Solenoid Circuit1. Brake actuator assembly
2. SFRH or SFRR circuitBC-105
C0236/22 SFL Solenoid Circuit1. Brake actuator assembly
2. SFLH or SFLR circuitBC-105
C0246/23 SRR Solenoid Circuit1. Brake actuator assembly
2. SRRH or SRRR circuitBC-105
C0256/24 SRL Solenoid Circuit1. Brake actuator assembly
2. SRLH or SRLR circuitBC-105
C0273/13Open or Short Circuit in ABS
Motor Relay Circuit1. ABS 1 fuse
2. VSC MTR relay
3. VSC MTR relay circuitBC-107
C0274/14Short to B+ in ABS Motor Relay
Circuit1. ABS 1 fuse
2. VSC MTR relay
3. VSC MTR relay circuitBC-107
C0278/11Open or Short Circuit in ABS
Solenoid Relay Circuit1. ABS 2 fuse
2. ABS SOL relay
3. ABS SOL relay circuit
4. Brake actuator assemblyBC-112
C0279/12Short to B+ in ABS Solenoid
Relay Circuit1. ABS 2 fuse
2. ABS SOL relay
3. ABS SOL relay circuit
4. Brake actuator assemblyBC-112
C1225/25 SM Solenoid Circuit1. Brake actuator assembly
2. VSC solenoid circuitBC-119
C1235/35Foreign Object is Attached on Tip
of Front Speed Sensor RH1. Right front speed sensor
2. Sensor installationBC-92
C1236/36Foreign Object is Attached on Tip
of Front Speed Sensor LH1. Left front speed sensor
2. Sensor installationBC-92
C1238/38Foreign Object is Attached on Tip
of Rear Speed Sensor RH1. Right rear speed sensor
2. Sensor installationBC-98
C1239/39Foreign Object is Attached on Tip
of Rear Speed Sensor LH1. Left rear speed sensor
2. Sensor installationBC-98
C1241/41 Low Battery Positive Voltage1. Battery
2. Charging system
3. Power source circuitBC-126

BC–94BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
DESCRIPTION
The speed sensor detects wheel speed and sends the appropriate signals to the ECU. These signals are
used to control the ABS control system. The front and rear rotors have 48 serrations each.
When the rotors rotate, the magnetic field emitted by the permanent magnet in the speed sensor
generates AC voltage. Since the frequency of this AC voltage changes in direct proportion to the speed of
the rotor, the frequency is used by the ECU to detect the speed of each wheel.
HINT:
• DTC C0200/31 and C1235/35 are for the right front speed sensor.
• DTC C0205/32 and C1236/36 are for the left front speed sensor.
DTC C0200/31 Right Front Wheel Speed Sensor Signal
DTC C0205/32 Front Speed Sensor LH Circuit
DTC C1235/35Foreign Object is Attached on Tip of Front
Speed Sensor RH
DTC C1236/36Foreign Object is Attached on Tip of Front
Speed Sensor LH
DTC Code DTC Detection Condition Trouble Area
C0200/31
C0205/32When any of the following is detected:
1. At a vehicle speed of 10 km/h (6 mph) or more, an
open or short in the sensor signal circuit continues
for 1 sec. or more.
2. Momentary interruption of sensor signal of faulty
wheel occurs 7 times or more.
3. Sensor signal circuit is open for 0.5 sec. or more.• Right front and left front speed sensor
• Each speed sensor circuit
• Speed sensor rotor
• Sensor installation
C1235/35
C1236/36With vehicle speed at 20 km/h (12 mph) or more,
sensor signal of faulty wheel generated noise for 5 sec.
or more.• Right front and left front speed sensor
• Sensor installation
F000010E12

BC–96BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
(a) INSPECTION USING OSCILLOSCOPE
(1) Connect the oscilloscope to terminal FR+ and FR-
or FL+ and FL- of the skid control ECU.
(2) Drive the vehicle at about 19 mph (30 km/h), and
check the signal waveform.
OK:
A waveform as shown in a figure should be
output.
HINT:
• As the vehicle speed (wheel revolution speed)
increases, a cycle of the waveform narrows and
the fluctuation in the output voltage becomes
greater.
• When noise is identified in the waveform on the
oscilloscope, error signals are generated due to
the speed sensor rotor's scratches, looseness or
foreign matter attached to it.
NOTICE:
When replacing the brake actuator assembly,
perform zero point calibration (See page BC-70).
NG
OK
(a) Make sure that there is no looseness at the connectors'
locking part and connecting part of connector.
(b) Disconnect the speed sensor connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
LH
RH
(d) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
LH
2CHECK SPEED SENSOR AND SENSOR ROTOR SERRATIONS
W004200E17
Go to step 6
REPLACE BRAKE ACTUATOR ASSEMBLY
3INSPECT FRONT SPEED SENSOR
C093876E20
Tester Connection Specified Condition
A3-1 (FL+) - A3-2 (FL-) 0.6 to 2.5 k
Tester Connection Specified Condition
A4-1 (FR+) - A4-2 (FR-) 0.6 to 2.5 k
Tester Connection Specified Condition
A3-1 (FL+) - Body ground 10 k
or higher

BC–98BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
(a) INSPECTION USING OSCILLOSCOPE
(1) Connect the oscilloscope to terminal FR+ and FR-
or FL+ and FL- of the skid control ECU.
(2) Drive the vehicle at about 19 mph (30 km/h), and
check the signal waveform.
OK:
A waveform as shown in a figure should be
output.
HINT:
• As the vehicle speed (Wheel revolution speed)
increases, a cycle of the waveform narrows and
the fluctuation in the output voltage becomes
greater.
• When noise is identified in the waveform on the
oscilloscope, error signals are generated due to
the speed sensor rotor's scratches, looseness or
foreign matter attached to it.
NOTICE:
When replacing the brake actuator assembly,
perform zero point calibration (See page BC-70).
NG
OK
(a) Check the speed sensor installation.
OK:
The installation bolt is tightened properly. There is
no clearance between the sensor and the front
steering knuckle.
Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf)
NOTICE:
Check the speed sensor signal after the replacement
(See page BC-72).
NG
OK
(a) Remove the front speed sensor (See page BC-187).
(b) Check the sensor tip.
5CHECK SPEED SENSOR AND SENSOR ROTOR SERRATIONS
W004200E18
Go to step 6
REPLACE BRAKE ACTUATOR ASSEMBLY
6CHECK FRONT SPEED SENSOR INSTALLATION
BR03795E45INSTALL FRONT SPEED SENSOR
CORRECTLY
7CHECK FRONT SPEED SENSOR TIP