2007 TOYOTA SIENNA rear wheel

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–107
BC
DESCRIPTION
This solenoid goes on when signals are received from the ECU and controls the pressure acting on the
wheel cylinders to control the braking force.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
This code is detected when a problem is determined in the
brake actuator assembly.
The solenoid circuit is in the brake actuator assembly.
Therefore, solenoid circuit inspection and solenoid unit
inspection cannot be performed. Be sure to check if the DTC
code is output before replacing the brake actuator assembly.
DTC C0226/21 SFR Solenoid Circuit
DTC C0236/22 SFL Solenoid Circuit
DTC C0246/23 SRR Solenoid Circuit
DTC C0256/24 SRL Solenoid Circuit
DTC Code DTC Detection Condition Trouble Area
C0226/21Open or short circuit in front right solenoid circuit
(SFRR or SFRH) continues for 0.05 sec. or more.• Brake actuator assembly
• Each solenoid circuit
C0236/22Open or short circuit in front left solenoid circuit (SFLR
or SFLH) continues for 0.05 sec. or more.• Brake actuator assembly
• Each solenoid circuit
C0246/23Open or short circuit in rear right solenoid circuit (SRRR
or SRRH) continues for 0.05 sec. or more.• Brake actuator assembly
• Each solenoid circuit
C0256/24Open or short circuit in rear left solenoid circuit (SRLR
or SRLH) continues for 0.05 sec. or more.• Brake actuator assembly
• Each solenoid circuit
1RECONFIRM DTC
F045115E02

BRAKE CONTROL – BRAKE ACTUATOR (w/ VSC)BC–179
BC
4. INSPECT OTHER WHEEL OPERATION
(a) Using the same procedure, check the solenoids of
the other wheels.
HINT:
Left front wheel:
SFLH, SFLR
Right rear wheel:
SRRH, SRRR
Left rear wheel:
SRLH, SRLR

BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEMBC–19
BC
DESCRIPTION
The speed sensor detects wheel speed and transmits the appropriate signals to the ECU. These signals
are used for control of the ABS control system. The front and rear rotors have 48 serrations each.
When the rotors rotate, the magnetic field generated by the permanent magnet in the speed sensor
induces an 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.
DTCs C1271/71 to C1276/76 can be deleted when the speed sensor sends a vehicle speed signal or the
Test Mode ends. DTCs C1271/71 to C1276/76 are output only in the Test Mode.
DTC C0200/31 Front Speed Sensor RH Circuit
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 C1271/71Low Output Signal of Front Speed Sensor RH
(Test Mode DTC)
DTC C1272/72Low Output Signal of Front Speed Sensor LH
(Test Mode DTC)
DTC C1275/75Abnormal Change in Output Signal of Front
Speed Sensor RH (Test Mode DTC)
DTC C1276/76Abnormal Change in Output Signal of Front
Speed Sensor LH (Test Mode DTC)
F000010E04

BC–184BRAKE CONTROL – BRAKE ACTUATOR (w/o VSC)
BC
4. INSPECT OTHER WHEEL OPERATION
(a) Using the same procedure, check the solenoids of
the other wheels.
HINT:
Left front wheel:
SFLH, SFLR
Right rear wheel:
SRRH, SRRR
Left rear wheel:
SRLH, SRLR

BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEMBC–25
BC
DESCRIPTION
Refer to DTCs C0200/31, C0205/32, C1235/35, and C1236/36 (See page BC-17).
DTCs C1273/73 to C1278/78 can be deleted when the speed sensor sends a vehicle speed signal or the
Test Mode ends. DTCs C1273/73 to C1278/78 are output only in the Test Mode.
HINT:
• DTC C0210/33 and C1238/38 are for the rear speed sensor RH.
• DTC C0215/34 and C1239/39 are for the rear speed sensor LH.
DTC C0210/33 Rear Speed Sensor RH Circuit
DTC C0215/34 Rear Speed Sensor LH Circuit
DTC C1238/38Foreign Object is Attached on Tip of Rear
Speed Sensor RH
DTC C1239/39Foreign Object is Attached on Tip of Rear
Speed Sensor LH
DTC C1273/73Low Output Signal of Rear Speed Sensor RH
(Test Mode DTC)
DTC C1274/74Low Output Signal of Rear Speed Sensor LH
(Test Mode DTC)
DTC C1277/77Abnormal Change in Output Signal of Rear
Speed Sensor RH (Test Mode DTC)
DTC C1278/78Abnormal Change in Output Signal of Rear
Speed Sensor LH (Test Mode DTC)
DTC No. DTC Detection Condition Trouble Area
C0210/33
C0215/34With vehicle speed at 10 km/h (6 mph) or more, sensor
signal circuit of faulty wheel is open or short for 1
second or more.
• Momentary interruption of sensor signal of faulty
wheel has occurred 7 times or more.
• Sensor signal circuit is open for 0.5 seconds or
more.• Rear speed sensor RH/LH
• Rear speed sensor RH/LH circuit
• Speed sensor rotor
• Sensor installation
• Brake actuator assembly
C1238/38
C1239/39At vehicle speed of 20 km/h (12 mph) or more, condition
that noise is included in speed sensor signal continues
for 5 seconds or more.• Rear speed sensor RH/LH
• Speed sensor rotor
• Sensor installation
• Brake actuator assembly

BC–26BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM
BC
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the intelligent tester and start from step 3 when not using the
intelligent tester.
(a) Select the DATA LIST mode on the intelligent tester.
ABS:
(b) Check that there is the speed value output from the
speed sensor displayed on the intelligent tester and the
speed value displayed on the speedometer are almost
the same when driving the vehicle.
OK:
The speed value output from the speed sensor
displayed on the intelligent tester is the same as
the actual vehicle speed.
NG
OK
1READ VALUE OF INTELLIGENT TESTER (REAR SPEED SENSOR)
F040100E03
Item (Display)Measurement Item / Range
(Display)Normal Condition Diagnostic Note
WHEEL SPD RRWheel speed sensor (RR) reading
/ min.: 0 km/h (0 mph), max.: 326
km/h (202 mph)Actual wheel speedSimilar speed as indicated on
speedometer
WHEEL SPD RLWheel speed sensor (RL) reading
/ min.: 0 km/h (0 mph), max.: 326
km/h (202 mph)Actual wheel speedSimilar speed as indicated on
speedometer
Go to step 3

BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEMBC–29
BC
(a) Disconnect the skid control ECU connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
RH:
LH:
NG
OK
(a) Connect the oscilloscope to terminals FR+ - FR- or FL+ -
FL- of the skid control ECU.
(b) Drive the vehicle at about 30 km/h (19 mph), and check
the signal waveform.
OK:
A waveform as shown in the figure should be
output.
HINT:
• As vehicle speed (wheel rotation speed) increases,
the width 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 rotor
scratches, looseness or foreign matter attached to the
speed sensor.
NG
6CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND REAR
SPEED SENSOR)
C119427E03
Tester Connection Specified Condition
S3-5 (RR+) - A28-1 (RR+) Below 1
S3-5 (RR+) - Body ground 10 k or higher
S3-4 (RR-) - A28-2 (RR-) Below 1
S3-4 (RR-) - Body ground 10 k or higher
Tester Connection Specified Condition
S3-7 (RL+) - A27-1 (RL+) Below 1
S3-7 (RL+) - Body ground 10 k or higher
S3-6 (RL-) - A27-2 (RL-) Below 1
S3-6 (RL-) - Body ground 10 k or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR
7INSPECT SPEED SENSOR AND SENSOR ROTOR SERRATIONS
W004200E03
Go to step 9

BC–190BRAKE CONTROL – REAR SPEED SENSOR (for 2WD)
BC
REMOVAL
HINT:
Remove the RH by the same procedure as the LH side.
1. REMOVE REAR WHEEL
2. SEPARATE SKID CONTROL SENSOR WIRE
(a) Disconnect the connector from the skid control
sensor.
3. REMOVE REAR BRAKE DRUM SUB-ASSEMBLY (for
Drum Type)
(a) Place matchmarks on the rear brake drum sub-
assembly and the axle hub.
(b) Remove the rear brake drum sub-assembly.
4. REMOVE REAR DISC BRAKE CALIPER ASSEMBLY
LH (for Disc Type)
(a) Remove the 2 bolts and rear brake caliper assembly
LH.
5. REMOVE REAR DISC (for Disc Type)
(a) Place matchmarks on the rear disc and the axle
hub.
(b) Remove the rear disc.
6. REMOVE REAR AXLE HUB & BEARING ASSEMBLY
LH (See page AH-16)
7. REMOVE REAR SPEED SENSOR
(a) Mount the rear axle hub in a soft jaw vise.
NOTICE:
Replace the axle hub assembly if it is dropped
or a strong shock is given to it.
(b) Using a pin punch and hammer, drive out the 2 pins
and remove the 2 attachments from SST.
(c) Using SST and 2 bolts (Diameter: 12 mm, pitch: 1.5
mm), remove the skid control sensor from the rear
axle hub.
SST 09520-00031 (09520-00040), 09521-00020,
09950-00020
NOTICE:
• If a damage is inflicted to the sensor rotor is
damaged, replace the axle hub assembly.
• Do not scratch the contacting surface of the
axle hub and speed sensor.
G024268
F040303E03