brake sensor TOYOTA SIENNA 2007 Service Service Manual

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–85
AX
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th
or 5th gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
problems of the shift solenoid valves, valve body or automatic transaxle (clutch, brake or gear etc.).
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". According to the input
shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the
actual gear position (1st, 2nd, 3rd, 4th or 5th gear position). When the gear position commanded by the
ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores the DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
DTC P0771Shift Solenoid "E" Performance (Shift Solenoid
Va l v e S R )
DTC No. DTC Detection Condition Trouble Area
P0771The gear required by the ECM does not match the
actual gear when driving (2-trip detection logic)• Shift solenoid valve SR remains open or closed
• Valve body is blocked
• Automatic transaxle (clutch, brake or gear etc.)
Related DTCsP0771:
Shift solenoid valve SR/Rationality check
Required sensors/ComponentsShift solenoid valve SR, Speed sensor (NT), Speed sensor (NC), Crankshaft
position sensor (NE)
Frequency of operation Continuous
DurationOFF malfunction (A)
1 sec.
OFF malfunction (B)
3.5 sec.
ON malfunction (A)
Continuous
ON malfunction (B) and (C)
0.8 sec.
MIL operation 2 driving cycles
Sequence of operation None
The monitor will run whenever this DTC is not presentP0115 - P0118 (ECT sensor)
P0125 (Insufficient ECT for closed loop)
P0500 (VSS)
P0748, P0778, P0798 (Shift solenoid valve (range))
ECT (Engine coolant temperature) 10
C (50F) or more
Transmission range"D"
TFT (Transmission fluid temperature) -20
C (-4F) or more
TFT sensor circuitNot circuit malfunction
ECT sensor circuitNot circuit malfunction
Turbine speed sensor circuit Not circuit malfunction
Intermediate shaft speed sensor circuit Not circuit malfunction
Output speed sensor circuit Not circuit malfunction
Shift solenoid valve SL1 circuit Not circuit malfunction
Shift solenoid valve SL2 circuit Not circuit malfunction

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–89
AX
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th
or 5th gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
problems of the shift solenoid valves, valve body or automatic transaxle (clutch, brake or gear etc.).
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". According to the input
shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the
actual gear position (1st, 2nd, 3rd, 4th or 5th gear position). When the gear position commanded by the
ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores the DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
DTC P0776Pressure Control Solenoid "B" Performance
(Shift Solenoid Valve SL2)
DTC No. DTC Detection Condition Trouble Area
P0776The gear required by the ECM does not match the
actual gear when driving (2-trip detection logic)• Shift solenoid valve SL2 remains open or closed
• Valve body is blocked
• Automatic transaxle (clutch, brake or gear etc.)
Related DTCsP0776:
Shift solenoid valve SL2/OFF malfunction
Shift solenoid valve SL2/ON malfunction
Required sensors/ComponentsShift solenoid valve SL2, Speed sensor (NT), Speed sensor (NC),
Crannkshaft position sensor (NE)
Frequency of operation Continuous
DurationOFF malfunction (A)
1.8 sec.
OFF malfunction (B) and (C)
0.8 sec.
ON malfunction (A) and (B)
0.8 sec.
ON malfunction (C)
0.4 sec.
MIL operation 2 driving cycles
Sequence of operation None
The monitor will run whenever this DTC is not present.P0115 - P0118 (ECT sensor)
P0125 (Insufficient ECT for closed loop)
P0500 (VSS)
P0748, P0778, P0798 (Shift solenoid valve (range))
ECT (Engine coolant temperature) 10
C (50F) or more
Transmission range"D"
TFT (Transmission fluid temperature) -20
C (-4F) or more
TFT sensor circuitNot circuit malfunction
ECT sensor circuitNot circuit malfunction
Turbine speed sensor circuit Not circuit malfunction
Intermediate shaft speed sensor circuit Not circuit malfunction
Output speed sensor circuit Not circuit malfunction
Shift solenoid valve SL1 circuit Not circuit malfunction
Shift solenoid valve SL2 circuit Not circuit malfunction

AX–102U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th
or 5th gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
troubles of the shift solenoid valves and valve body.
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". According to the input
shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the
actual gear position (1st, 2nd, 3rd, 4th or 5th gear position). When the gear position commanded by the
ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores the DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
DTC P0796Pressure Control Solenoid "C" Performance
(Shift Solenoid Valve SL3)
DTC No. DTC Detection Condition Trouble Area
P0796The gear required by the ECM does not match the
actual gear when driving (2-trip detection logic)• Shift solenoid valve SL3 remains open or closed
• Valve body is blocked
• Automatic transaxle (clutch, brake or gear etc.)
Related DTCsP0796:
Shift solenoid valve SL3/OFF malfunction
Shift solenoid valve SL3/ON malfunction
Required sensors/ComponentsShift solenoid valve SL3, Speed sensor (NT), Speed sensor (NC), Crankshaft
position sensor (NE)
Frequency of operation Continuous
DurationOFF malfunction (A)
0.8 sec.
OFF malfunction (B)
1 sec.
ON malfunction (A) and (B)
0.8 sec.
ON malfunction (C)
0.4 sec.
MIL operation 2 driving cycles
Sequence of operation None
The monitor will run whenever this DTC is not present.P0115 - P0118 (ECT sensor)
P0125 (Insufficient ECT for closed loop)
P0500 (VSS)
P0748, P0778, P0798 (Shift solenoid valve (range))
ECT (Engine coolant temperature) 10
C (50F) or more
Transmission range"D"
TFT (Transmission fluid temperature) -20
C (-4F) or more
TFT sensor circuitNot circuit malfunction
ECT sensor circuitNot circuit malfunction
Turbine speed sensor circuit Not circuit malfunction
Intermediate shaft speed sensor circuit Not circuit malfunction
Output speed sensor circuit Not circuit malfunction
Shift solenoid valve SL1 circuit Not circuit malfunction
Shift solenoid valve SL2 circuit Not circuit malfunction

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–117
AX
SYSTEM DESCRIPTION
The linear solenoid valve (SLT) controls the transmission line pressure for smooth transmission operation
based on signals from the throttle position sensor and the vehicle speed sensor. The ECM adjusts the
duty ratio (*) of the SLT solenoid valve to control hydraulic line pressure coming from the primary regulator
valve. Appropriate line pressure assures smooth shifting with varying engine outputs.
(*): Duty Ratio
The duty ratio is the ratio of the period of continuity in one cycle. For example, if A is the period of
continuity in one cycle, and B is the period of non-continuity, then
Duty Ratio=A/(A+B) x 100(%)
DTC P2714Pressure Control Solenoid "D" Performance
(Shift Solenoid Valve SLT)
DTC No. DTC Detection Condition Trouble Area
P2714ECM detects a malfunction on SLT (ON side) according
to the revolution difference of the turbine, intermediate
and the output shaft, and also by the oil pressure. (2-
trip detection logic)• Shift solenoid valve SLT remains closed
• Valve body is blocked
• Automatic transaxle (clutch, brake or gear, etc.)
C108924E02

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE UNITAX–231
AX
64. INSTALL TRANSAXLE CASE 2ND BRAKE GASKET
(a) Coat a new transaxle case 2nd brake gasket with
ATF, and install it to the transaxle case.
NOTICE:
Be sure not to damage the lip of the transaxle
case brake gasket when inserting the gasket to
the case. Apply sufficient ATF to the gasket
before installation. Be careful about the
direction of parts.
65. INSTALL GOVERNOR APPLY GASKET NO.1
(a) Coat a new governor apply gasket No.1 with ATF,
and install it to the transaxle case.
NOTICE:
Be sure not to damage the lip of the transaxle
case brake gasket when inserting the gasket to
the case. Apply sufficient ATF to the gasket
before installation. Be careful about the
direction of parts.
66. INSTALL TRANSMISSION WIRE
(a) Coat a new O-ring with ATF, and install it to the
transmission wire.
NOTICE:
Make sure that the O-ring is not twisted,
protruded, or pinched when installing the wire
transmission to the transaxle case. Apply
sufficient ATF to the O-ring before installation.
(b) Install the transmission wire retaining bolt.
Torque: 5.4 N*m (55 kgf*cm, 48 in.*lbf)
67. CONNECT TRANSMISSION WIRE
(a) Coat an O-ring of the ATF temperature sensor with
AT F.
(b) Install the ATF temperature sensor with the lock
plate and bolt.
Torque: 6.6 N*m (67 kgf*cm, 58 in.*lbf)
(c) Connect the 7 solenoid connectors.
NOTICE:
• Connect the connectors A, B, C, D, E, F, G, in
the order from shortest to longest.
• Apply ATF to the bolt.
C083128
C083127
D003636E01
D003547E06
C091927E05

DS–20DRIVE SHAFT – FRONT DRIVE SHAFT
DS
9. INSTALL FRONT AXLE HUB LH NUT
(a) Using a socket wrench (30 mm), install a new axle
hub LH nut.
Torque: 294 N*m (3,000 kgf*cm, 217 ft.*lbf)
(b) Using a chisel and hammer, stake the axle hub LH
nut.
10. INSTALL FRONT WHEEL
Torque: 103 N*m (1,050 kgf*cm, 76 ft.*lbf)
11. ADD AUTOMATIC TRANSAXLE FLUID
HINT:
• for U151E: (See page AX-123)
• for U151F: (See page AX-123)
12. ADD TRANSFER OIL (for 4WD)
HINT:
(See page TF-3)
13. INSPECT AND ADJUST FRONT WHEEL ALIGNMENT
HINT:
(See page SP-4)
14. CHECK ABS SPEED SENSOR SIGNAL
HINT:
• for ANTI-LOCK BRAKE SYSTEM: (See page BC-3)
• for VEHICLE STABILITY CONTROL SYSTEM: (See
page BC-72)
C068609

DS–22DRIVE SHAFT – REAR DRIVE SHAFT (for 4WD)
DS
REMOVAL
1. REMOVE REAR WHEEL
2. REMOVE TAIL EXHAUST PIPE ASSEMBLY (See page
EX-8)
3. SEPARATE REAR SPEED SENSOR
(a) Remove the bolt and the speed sensor from the
axle carrier.
NOTICE:
• Be careful not to damage the speed sensor.
• Prevent foreign matter from adhering to the
speed sensor.
4. REMOVE REAR AXLE SHAFT NUT
(a) Using SST and a hammer, unstake part of the axle
shaft nut.
SST 09930-00010
NOTICE:
Loosen the staked part of the nut completely,
otherwise the screw of the drive shaft may be
damaged.
(b) While apply the brakes, remove the axle shaft nut.
5. REMOVE REAR DRIVE SHAFT ASSEMBLY LH
(a) Place matchmarks on the drive shaft and differential
side gear shaft.
(b) Remove the 4 nuts and washers, and disconnect
the drive shaft from the differential side gear shaft.
(c) Remove the drive shaft from the axle carrier.
6. SECURE REAR AXLE ASSEMBLY
NOTICE:
• After disconnecting the drive shaft from the axle
hub, work carefully so as not to damage the ABS
speed sensor rotor serration on the drive shaft.
• The hub bearing could be damaged if it is
subjected to the vehicle weight, such as when
moving the vehicle with the drive shaft removed.
Therefore, if it is absolutely necessary to place
the vehicle weight on the hub bearing, first
support it with SST.
SST 09608-16042 (09608-02021, 09608-02041)
F045049E02
C097746E01
C066030E01

DRIVE SHAFT – FRONT DRIVE SHAFTDS–5
DS
REMOVAL
1. DRAIN AUTOMATIC TRANSAXLE FLUID
(a) Remove the drain plug, gasket and drain ATF.
(b) Install a new gasket and the drain plug.
Torque: 49 N*m (500 kgf*cm, 36 ft.*lbf)
2. DRAIN TRANSFER OIL (for 4WD)
HINT:
(See page TF-8)
3. REMOVE FRONT WHEEL
4. REMOVE FRONT AXLE HUB LH NUT
(a) Using SST and a hammer, unstake the staked part
of the axle hub LH nut.
SST 09930-00010
NOTICE:
Loosen the staked part of the nut completely,
otherwise the screw of the drive shaft may be
damaged.
(b) While applying the brakes, remove the lock axle hub
LH nut.
5. SEPARATE FRONT STABILIZER LINK ASSEMBLY LH
(a) Remove the nut, and separate the stabilizer link
assembly LH.
HINT:
If the ball joint turns together with the nut, use a
hexagon wrench (6 mm) to hold the stud.
6. SEPARATE SPEED SENSOR FRONT LH
(a) Remove the bolt and clip, and separate the sensor
wire and hose from the shock absorber.
NOTICE:
Be careful not to damage the speed sensor.
(b) Remove the bolt, and separate the speed sensor
from LH from the steering knuckle.
NOTICE:
Prevent foreign matter from adhering to the
speed sensor.
F040146E09
F040136
C083022
F040147

DS–6DRIVE SHAFT – FRONT DRIVE SHAFT
DS
7. SEPARATE TIE ROD END SUB-ASSEMBLY LH
(a) Remove the cotter pin and nut.
(b) Using SST, separate the tie rod end from the
steering knuckle.
SST 09628-62011
8. SEPARATE NO. 1 FRONT SUSPENSION ARM SUB-
ASSEMBLY LOWER LH
(a) Remove the bolt and 2 nuts, and separate the No. 1
front suspension arm sub-assembly lower from the
lower ball joint.
9. SEPARATE FRONT AXLE ASSEMBLY LH
(a) Using a plastic hammer, separate the drive shaft
from the axle hub.
NOTICE:
Be careful not to damage the boot and speed
sensor rotor.
10. REMOVE FRONT DRIVE SHAFT ASSEMBLY LH
(a) Using SST, remove the front drive shaft assembly
LH.
SST 09520-01010, 09520-24010 (09520-32040)
NOTICE:
• Be careful not to damage the transaxle case
oil seal, inboard joint boot and drive shaft
dust cover.
• Be careful not to drop the drive shaft
assembly.
11. REMOVE FRONT DRIVE SHAFT ASSEMBLY RH (for
2WD)
(a) Using a screwdriver, remove the bearing brake hole
snap ring.
(b) Remove the bolt and front drive shaft assembly RH
from the drive shaft bearing bracket.
F045060E06
F040142
D027403E03
F040148E05
C080304

DS–20DRIVE SHAFT – FRONT DRIVE SHAFT
DS
9. INSTALL FRONT AXLE HUB LH NUT
(a) Using a socket wrench (30 mm), install a new axle
hub LH nut.
Torque: 294 N*m (3,000 kgf*cm, 217 ft.*lbf)
(b) Using a chisel and hammer, stake the axle hub LH
nut.
10. INSTALL FRONT WHEEL
Torque: 103 N*m (1,050 kgf*cm, 76 ft.*lbf)
11. ADD AUTOMATIC TRANSAXLE FLUID
HINT:
• for U151E: (See page AX-123)
• for U151F: (See page AX-123)
12. ADD TRANSFER OIL (for 4WD)
HINT:
(See page TF-3)
13. INSPECT AND ADJUST FRONT WHEEL ALIGNMENT
HINT:
(See page SP-4)
14. CHECK ABS SPEED SENSOR SIGNAL
HINT:
• for ANTI-LOCK BRAKE SYSTEM: (See page BC-3)
• for VEHICLE STABILITY CONTROL SYSTEM: (See
page BC-72)
C068609