2007 TOYOTA SIENNA Service Repair Manual

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Page 2497 of 3000

TOYOTA SIENNA 2007 Service Repair Manual BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–135
BC
INSPECTION PROCEDURE
(a) Check that the stop light comes on when the brake pedal
is depressed and goes off when the brake pedal is
rel

Page 2498 of 3000

TOYOTA SIENNA 2007 Service Repair Manual BC–136BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
A
(a) Disconnect the stop light switch assembly connector.
(b) Measure the resistance according to the value(s) in the
table below.
Sta

Page 2499 of 3000

TOYOTA SIENNA 2007 Service Repair Manual BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–137
BC
OK
REPLACE BRAKE ACTUATOR ASSEMBLY

Page 2500 of 3000

TOYOTA SIENNA 2007 Service Repair Manual BC–138BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine.
DTC C1251/51 Open

Page 2501 of 3000

TOYOTA SIENNA 2007 Service Repair Manual BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–139
BC
(c) Select the ACTIVE TEST mode on the intelligent tester.
ABS / VSC:
(d) Check the operation sound of the ABS motor individually
when

Page 2502 of 3000

TOYOTA SIENNA 2007 Service Repair Manual BC–140BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
DESCRIPTION
The skid control ECU acquires steering angle sensor zero point every time the ignition switch is turned to
the ON position

BC–140BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
DESCRIPTION
The skid control ECU acquires steering angle sensor zero point every time the ignition switch is turned to
the ON position and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The
ECU also stores the previous zero point.
If front wheel alignment or steering wheel position is adjusted without disconnecting the negative battery
terminal, or if yaw rate and deceleration sensor zero point is not acquired after the adjustments have been
completed, the skid control ECU detects the difference between the previous zero point and newly
acquired zero point and outputs this DTC to indicate a poor adjustment.
Warning of the steering angle sensor zero point malfunction will be cancelled by turning the ignition switch
off.
INSPECTION PROCEDURE
NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (See page BC-70).
(a) Perform zero point calibration of the yaw rate and
deceleration sensor (See page BC-70).
HINT:
• When the stored zero point of the yaw rate and
deceleration sensor is erased, steering angle sensor
zero point will also be erased.
• If the zero point and output value of the yaw rate and
deceleration sensor and the output value of the speed
sensors are not normal, steering angle sensor zero
point cannot be acquired normally even if the vehicle
is driven straight ahead at 35 km/h (22 mph) or more.
NEXT
(a) Drive the vehicle straight ahead at 35 km/h (22 mph) or
more for at least 5 seconds.
(b) Check that the centered position of the steering wheel is
correctly set while driving straight ahead.
HINT:
If front wheel alignment and steering position are
adjusted as a result of abnormal centered position of the
steering wheel, acquire yaw rate and deceleration
sensor zero point again after the adjustments are
completed.
DTC C1290/66 Steering Angle Sensor Zero Point Malfunction
DTC Code DTC Detection Condition Trouble Area
C1290/66The steering angle sensor zero point calibration position
vastly differs from the recorded value• Yaw rate and deceleration sensor zero point
calibration incomplete
• Poor adjustment of the centered position of the
steering wheel
• Poor adjustment of front wheel alignment
1PERFORM ZERO POINT CALIBRATION OF YAW RATE AND DECELERATION SENSOR
2CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION

Page 2503 of 3000

TOYOTA SIENNA 2007 Service Repair Manual BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–141
BC
OK:
The centered position of the steering wheel is
correctly set.
NG
OK
(a) Turn the ignition switch off.
(b) Clear the DTC (See page B

Page 2504 of 3000

TOYOTA SIENNA 2007 Service Repair Manual BC–142BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
INSPECTION PROCEDURE
Refer to CAN communication system (See page CA-7).
DTC U0073/94 Control Module Communication Bus OFF
DTC U0100/65 L

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