TOYOTA SIENNA 2007 Service Repair Manual

BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEMBC–15
BC
DATA LIST / ACTIVE TEST
1. DATA LIST
(a) While the intelligent tester is connected to the DLC3
with the ignition switch in the ON position, the ABS
data list can be displayed. Follow the prompts on
the tester screen to access the DATA LIST.
Tester Display Measurement Item/Range Normal Condition Diagnostic Note
ABS MOT RELAY ABS motor relay / ON or OFFON: During pump motor
operation
OFF: No pump motor operation-
SOL RELAY Solenoid relay / ON or OFFON: Solenoid relay ON
OFF: Solenoid relay OFF-
STOP LIGHT SW Stop light switch / ON or OFFON: Brake pedal depressed
OFF: Brake pedal released-
PKB SW Parking brake switch / ON or OFFON: Parking brake applied
OFF: Parking brake released-
ABS OPERT FRABS operation (FR) / BEFORE or
OPERATEBEFORE: No ABS operation (FR)
OPERATE: During ABS operation
(FR)-
ABS OPERT FLABS operation (FL) / BEFORE or
OPERATEBEFORE: No ABS operation (FL)
OPERATE: During ABS operation
(FL)-
ABS OPERT RRABS operation (RR) / BEFORE or
OPERATEBEFORE: No ABS operation
(RR)
OPERATE: During ABS operation
(RR)-
ABS OPERT RLABS operation (RL ) / BEFORE or
OPERATEBEFORE: No ABS operation (RL)
OPERATE: During ABS operation
(RL)-
WHEEL SPD FRWheel speed sensor (FR) reading
/ min.: 0 km/h (0 mph), max.: 326
km/h (202 mph)Actual wheel speedSimilar speed as indicated on
speedometer
WHEEL SPD FLWheel speed sensor (FL) reading
/ min.: 0 km/h (0 mph), max.: 326
km/h (202 mph)Actual wheel speedSimilar speed as indicated on
speedometer
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
IG VOLTAGEECU IG Power supply voltage /
TOO LOW/NORMALTOO LOW: 9.5 V or less
NORMAL: 9.5 to 14.0 V-
SFRRABS solenoid (SFRR) / ON or
OFFON: Operates -
SFRHABS solenoid (SFRH) / ON or
OFFON: Operates -
SFLRABS solenoid (SFLR) / ON or
OFFON: Operates -
SFLHABS solenoid (SFLH) / ON or
OFFON: Operates -
SRRRABS solenoid (SRRR) / ON or
OFFON: Operates -
SRRHABS solenoid (SRRH) / ON or
OFFON: Operates -
SRLRABS solenoid (SRLR) / ON or
OFFON: Operates -
SRLHABS solenoid (SRLH) / ON or
OFFON: Operates -

BC–16BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM
BC
2. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the intelligent tester
allows the relay, actuator, etc. to operate without
removing any parts. Performing the ACTIVE TEST as
the first step of troubleshooting is one of the methods to
shorten labor time.
It is possible to display the DATA LIST during the
ACTIVE TEST.
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) According to the display on the tester, perform the
ACTIVE TEST.
HINT:
The ignition switch must be turned to the ON
position to proceed to the ACTIVE TEST using the
intelligent tester.
VEHICLE SPDVehicle speed reading / min.: 0
km/h (0 mph), max.: 326 km/h
(202 mph)Actual vehicle speed Speed indicated on speedometer
TEST MODETest mode operation / NORMAL
or TESTNORMAL: Normal mode
TEST: During test mode-
#CODENumber of DTC recorded / min.:
0, max.: 255Min.: 0
Max.: 255- Tester Display Measurement Item/Range Normal Condition Diagnostic Note
Tester Display Test Part Control Range Diagnostic Note
SFRR ABS solenoid (SFRR) Solenoid ON / OFFOperating sound of solenoid
(clicking sound) is heard
SFRH ABS solenoid (SFRH) Solenoid ON / OFFOperating sound of solenoid
(clicking sound) is heard
SFLR ABS solenoid (SFLR) Solenoid ON / OFFOperating sound of solenoid
(clicking sound) is heard
SFLH ABS solenoid (SFLH) Solenoid ON / OFFOperating sound of solenoid
(clicking sound) is heard
SRRR ABS solenoid (SRRR) Solenoid ON / OFFOperating sound of solenoid
(clicking sound) is heard
SRRH ABS solenoid (SRRH) Solenoid ON / OFFOperating sound of solenoid
(clicking sound) is heard
SRLR ABS solenoid (SRLR) Solenoid ON / OFFOperating sound of solenoid
(clicking sound) is heard
SRLH ABS solenoid SRLH) Solenoid ON / OFFOperating sound of solenoid
(clicking sound) is heard
ABS MOT RELAY ABS motor relay Relay ON / OFFOperating sound of motor is
heard
SOL RELAY ABS solenoid relay Relay ON / OFFOperating sound of solenoid
(clicking sound) is heard
ABS WARNING LIGHT ABS warning light Warning Light ON / OFF Observe combination meter
BRAKE WARNING LIGHT BRAKE warning light Warning Light ON / OFF Observe combination meter

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–69
BC
HOW TO PROCEED WITH
TROUBLESHOOTING
The intelligent tester can be used at step 2, 5, 8, 11.
HINT:
See page BC-82 and BC-84.
HINT:
See page BC-82.
HINT:
See page BC-79.
HINT:
See page BC-88.
1Vehicle Brought to Workshop
2Check and Clear DTCs and Freeze Frame Data
3Problem Symptom Confirmation
Symptom does not occur: Go to step 5
Symptom occurs: Go to step 6
4Symptom Simulation
5DTC Check
There is no output: Go to step 7
There is output: Go to step 8
6Problem Symptoms Table
Check for fluid leakage and Go to step 10
7DTC Chart

BC–70BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
CALIBRATION
1. CLEAR ZERO POINT CALIBRATION (WHEN USING
INTELLIGENT TESTER):
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Operate the intelligent tester to erase the codes
(select "RESET MEMORY").
HINT:
Refer to the intelligent tester operator's manual for
further details.
(d) Using the intelligent tester, perform zero point
calibration of the yaw rate and deceleration sensor.
8Circuit Inspection
9Identification of Problem
10Repair
11Confirmation Test
End
E144486E01
C106531

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–71
BC
2. PERFORM ZERO POINT CALIBRATION OF YAW
RATE AND DECELERATION SENSOR (WHEN USING
INTELLIGENT TESTER):
NOTICE:
• While obtaining the zero point, do not vibrate the
vehicle by tilting, moving or shaking it and keep it
in a stationary condition. (Do not turn the ignition
switch to the ON position.)
• Be sure to do this on a level surface (with an
inclination of less than 1 %).
(a) Procedures for test mode.
(1) Check that the steering wheel is in the straight-
ahead position and move the shift lever to the P
position and apply the parking brake.
(2) Connect the intelligent tester to the DLC3.
(3) Turn the ignition switch to the ON position.
(4) Set the intelligent tester to test mode (select
"TEST MODE").
HINT:
Refer to the intelligent tester operator's manual
for further details.
(b) Obtain the zero point of the yaw rate and
deceleration sensor.
(1) Keep the vehicle in the stationary condition on a
level surface for 2 seconds or more.
(2) Check that the ABS warning light and VSC
warning light blink.
HINT:
• If the ABS warning light and VSC warning
light do not blink perform zero point
calibration again.
• The zero point calibration is performed only
once after the system enters the test mode.
• Calibration cannot be performed again until
the stored data is cleared once.
(c) Turn the ignition switch off and disconnect the
intelligent tester.
E144486E01
C106532
BR03904E37

BC–72BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
3. PERFORM ZERO POINT CALIBRATION OF YAW
RATE AND DECELERATION SENSOR (WHEN USING
SST CHECK WIRE):
NOTICE:
• While obtaining the zero point, do not vibrate the
vehicle by tilting, moving or shaking it and keep it
in a stationary condition. (Do not turn the ignition
switch to the ON position.)
• Be sure to do this on a level surface (with an
inclination of less than 1 %).
(a) Clear the zero point calibration.
(1) Turn the ignition switch to the ON position.
(2) Using SST, connect and disconnect terminals
TS and CG of the DLC3 4 times or more within 8
seconds.
SST 09843-18040
(b) Procedures for test mode.
(1) Turn the ignition switch off.
(2) Using SST, connect terminals TS and CG of the
DLC3.
SST 09843-18040
(3) Check that the steering wheel is in the
straightahead position and move the shift lever
to the P position.
(c) Obtain the zero point of the yaw rate and
deceleration sensor.
(1) Turn the ignition switch to the ON position.
(2) Keep the vehicle in a stationary condition on a
level surface for 2 seconds or more.
(3) Check that the ABS warning light and VSC light
blink (test mode).
HINT:
• If the ABS warning light and VSC warning
light do not blink perform zero point
calibration again.
• The zero point calibration is performed only
once after the system enters the test mode.
• Calibration cannot be performed again until
the stored data is cleared once.
(d) Turn the ignition switch off and disconnect the SST
from the DLC3.
G022987E07
BR03904E38

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–73
BC
TEST MODE PROCEDURE
1. WARNING LIGHT AND INDICATOR LIGHT BULB
CHECK
(a) Check the warning lights.
(1) Release parking brake pedal.
(2) When the ignition switch is turned to the ON
position, check that the ABS warning light,
BRAKE warning light, VSC warning light, TRAC
OFF indicator light (2WD) and SLIP indicator
light stay on for approx. 3 seconds.
HINT:
• When the parking brake is applied or the level
of brake fluid is low, the BRAKE warning light
comes on.
• If the ECU has any stored DTCs, the ABS
warning light, VSC warning light and TRAC
OFF indicator light (2WD) comes on.
• If the indicator does not come on, inspect it
the bulb is blown out, and also the wire
harness between the skid control ECU and
the combination meter.
• If the indicator remains on, proceed to
troubleshooting for the light circuit below.
2. SENSOR SIGNAL CHECK BY TEST MODE (SIGNAL
CHECK) (WHEN USING INTELLIGENT TESTER):
(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.
F045096E07
Trouble Area See procedure
ABS warning light circuitBC-141 or BC-145
VSC warning light circuitBC-147 or BC-150
BRAKE warning light circuitBC-152
TRAC OFF indicator light circuit (2WD)BC-157 or BC-162
SLIP indicator light circuitBC-164 or BC-167

BC–74BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
(b) Procedures for test mode.
(1) Turn the ignition switch off.
(2) Connect the intelligent tester to the DLC3.
(3) Check that the steering wheel is in the straight
ahead position and move the shift lever to the P
position.
(4) Turn the ignition switch to the ON position.
(5) Set the intelligent tester to test mode (select
"SIGNAL CHECK").
HINT:
Refer to the intelligent tester operator's manual
for further details.
(6) Check that the ABS warning light and VSC
warning light blink (test mode).
HINT:
If the ABS warning light and VSC warning light
do not blink, inspect the ABS warning light circuit
and/or VSC warning light circuit.
3. MASTER CYLINDER PRESSURE SENSOR CHECK
(WHEN USING INTELLIGENT TESTER):
(a) Leave the vehicle in a stationary condition and
release the brake pedal for 1 second or more, and
quickly depress the brake pedal with a force of 98 N
(10 kgf, 22 lbf) or more for 1 second or more.
(b) Check the ABS warning light stays on for 3
seconds.
HINT:
• Ensure that the ABS warning light comes on.
• While the ABS warning light stays on, continue to
depress the brake pedal with a force of 98 N (10
kgf, 22 lbf) or more.
• The ABS warning light comes on for 3 seconds
every time brake pedal operation above is
performed.
E144486E01
C106533
BR03904E42
Trouble Area See procedure
ABS warning lightBC-141 or BC-145
VSC warning lightBC-147 or BC-150

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