2007 TOYOTA SIENNA throttle position sensor

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

AX–118U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
MONITOR DESCRIPTION
In any forward position, when the difference between the revolutions of the turbine, Intermediate and
output shaft exceeds the specified value (varies with Intermediate, output speed) determined by the ECM,
the ECM illuminates the MIL and store the DTC.
When shift solenoid valve SLT remains on, the oil pressure goes down and the clutch engagement force
decreases.
NOTICE:
If you continue driving under these conditions, the clutch will burn out and the vehicle will no
longer be drivable.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
ON malfunction:
ON malfunction (A):
Related DTCs P2714: Shift solenoid valve SLT/ON malfunction
Required sensors/ComponentsShift solenoid valve SLT, Speed sensor (NT), Speed sensor (NC),
Crankshaft position sensor (NE)
Frequency of operation Continuous
Duration 0.5 sec.
MIL operation 2 driving cycles
Sequence of operation None
The monitor will run whenever this DTC is not present. None
Transmission range"D"
TFT (Transmission fluid temperature) -20
C (-4F) or more
TFT sensor circuitNot circuit malfunction
Turbine speed sensor circuit Not circuit malfunction
Intermediate shaft speed sensor circuit Not circuit malfunction
Output speed sensor circuitNot circuit malfunction
Shift solenoid valve SL1 circuit Not circuit malfunction
Shift solenoid valve SL2 circuit Not circuit malfunction
Shift solenoid valve SL3 circuit Not circuit malfunction
Shift solenoid valve S4 circuit Not circuit malfunction
Shift solenoid valve SR circuit Not circuit malfunction
Shift solenoid valve DSL circuit Not circuit malfunction
Shift solenoid valve SLT circuit Not circuit malfunction
Electronic throttle systemNot circuit malfunction
ECM selected gear 1st
Temporary MAIN gear 1st or 2nd or 3rd or 4th
NT - NC x Temporary MAIN gear ratio
NT: Input (turbine) speed
NC: Intermediate shaft speed100 rpm or more at Intermediate shaft speed 1,000 rpm
Temporary U/D gear Low
NC - NO x Temporary U/D gear ratio
NO: Output speed300 rpm or more at Output speed 1,000 rpm
TT
TT: Turbine Torque900 Nm or more
NT 250 rpm or more
NC 250 rpm or more
NO 250 rpm or more

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–123
AX
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 cycle 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(%)
MONITOR DESCRIPTION
When an open or short in the linear solenoid valve (SLT) circuit is detected, the ECM interprets this as a
fault. The ECM will turn on the MIL and store the DTC.
MONITOR STRATEGY
DTC P2716Pressure Control Solenoid "D" Electrical (Shift
Solenoid Valve SLT)
DTC No. DTC Detection Condition Trouble Area
P2716Open or short is detected in shift solenoid valve SLT
circuit for 1 second or more while driving (1-trip
detecting logic).• Open or short in shift solenoid valve SLT circuit
• Shift solenoid valve SLT
•ECM
Related DTCs P2716: Shift solenoid valve SLT/Range check
Required sensors/Components Shift solenoid valve SLT
Frequency of operation Continuous
Duration 1 sec.
MIL operation Immediate
Sequence of operation None
C114295E01

AX–22U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
PROBLEM SYMPTOMS TABLE
HINT:
• If a normal code is displayed during the diagnostic trouble
code check although the trouble still occurs, check the
electrical circuits for each symptom in the order given in
the charts on the following pages and proceed to the page
given for troubleshooting.
• The Matrix Chart is divided into 2 chapters.
• When the circuit on which mark *1 is attached is a
malfunction, DTC could be output.
Refer to the table below when the trouble cause is considered
to be electrical. If the instruction PROCEED TO NEXT
CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE is given in the flowchart of each circuit, inspect the
suspected areas in descending order for each symptom. If
the trouble still occurs even though there are no
abnormalities in the inspections listed for the symptoms,
check and replace the ECM.
1. Chapter 1: Electronic Circuit Matrix Chart
Symptom Suspected Area See page
No down-shift (A particular gear, from 1st to 4th gear,
is not down-shifted)ECMIN-30
No down-shift (5th -> 4th)Transmission control switch (D <--> 4 position) circuitAX-38
Shift solenoid valve S4 circuit *1AX-104
ECMIN-30
No up-shift (A particular gear, from 1st to 4th gear, is
not up-shifted)ECMIN-30
No up-shift (4th -> 5th)Transmission control switch (D <--> 4 position) circuitAX-38
Shift solenoid valve S4 circuit *1AX-104
ECMIN-30
No lock-upStop light switch circuit *1AX-56
Engine coolant temp. sensor circuit *1ES-56
ECMIN-30
No lock-up off ECMIN-30
Shift point too high or too lowThrottle position sensor circuit *1ES-56
ECMIN-30
Up-shift to 5th from 4th while shift lever is in 4 positionTransmission control switch (D <--> 4 position) circuitAX-38
ECMIN-30
Up-shift to 5th from 4th while engine is coldEngine coolant temp. sensor circuit *1ES-56
ECMIN-30
Up-shift to 2nd from 1st while shift lever is in L positionTransmission control switch (L <--> 2 position) circuit *1AX-38
ECMIN-30
Harsh engagement (N -> D)Shift solenoid valve SL1 circuit *1AX-70
ECMIN-30
Harsh engagement (Lock-up) ECMIN-30
Harsh engagement (Any driving position) ECMIN-30
Poor acceleration ECMIN-30
No kick-down ECMIN-30
Engine stalls when starting off or stopping ECMIN-30
Malfunction in shiftingPark/neutral position switch circuit *1AX-38
Transmission control switch (D <--> 4 position) circuitAX-38
ECMIN-30

BC–86BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
FREEZE FRAME DATA
1. FREEZE FRAME DATA
(a) The vehicle (sensor) status, stored during ABS and/
or VSC operation or at the time of an error code
detection, can be displayed by the intelligent tester.
(b) Only one record of freeze frame data is stored and
the freeze frame data generated during ABS and/or
VSC operation are updated whenever the vehicle
status is changed. Also, the number of the ignition
switch is ON after the freeze frame data is stored
can be stored up to 31 and it can be displayed. After
storing the DTC, the freeze frame data is not up-
dated.
HINT:
If the ignition switch "ON" operation exceeds 31
times, "31"appears on the display.
(c) If a malfunction occurs, the freeze frame data is
stored but the ABS actuation data is deleted.
*
1: If no conditions are specifically stated for "Idling",
it means the shift lever is at N or P position, the A/C
switch is OFF and all accessory switches are OFF.
*
2: 2WD only
Tester Display Measurement Item
Reference Value*1
VEHICLE SPD Wheel speed sensor reading Speed indicated on speedometer
STOP LIGHT SW Stop light switch signal Stop light switch ON: ON, OFF: OFF
# IG ONNumber of operations of ignition
switch ON after memorizing freeze
frame data0 to 31
MAS CYL PRESSMaster cylinder pressure sensor
readingBrake pedal release : 0.3 to 0.9 V
Brake pedal depress: 0.8 to 4.5 V
MASS PRESS GRADEMaster cylinder pressure sensor
change-30 to 200 MPa/s
SYSTEM System statusABS activated: ABS
VSC/TRC activated: VSC/TRC
BA activated: BA
Fail safe mode activated: FAIL SF
No system activated: NO SYS
YAW RATE Yaw rate angle sensor reading -100 to 100
STEERING ANG Steering sensor readingLeft turn: Increase
Right turn: Drop
THROTTLE Throttle position sensor readingRelease accelerator pedal: Approx. 0 deg.
Depress accelerator pedal: Approx. 90 deg.
G (RIGHT & LEFT) Right and left G -1.869 to 1.869
G (BACK & FORTH) Back and forth G -1.869 to 1.869
VSC (TRC) OFF SW*
2Traction OFF switch signalTRAC OFF SW ON: ON
OFF: OFF
SHIFT POSITION Shift lever positionFA I L
P,N
R
D
4
3
2
L

BC–88BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC*: 2WD
SRRR (SRR)ABS solenoid (SRRR (SRR)) /
ON or OFFON : Operate -
SRRH (SRH)ABS solenoid (SRRH (SRH)) /
ON or OFFON : Operate -
SRLRABS solenoid (SRLR) / ON or
OFFON : Operate -
SRLHABS solenoid (SRLH) / ON or
OFFON : Operate -
SMF (BA-SOL)TRAC solenoid (SMF) / ON or
OFFON : Operate -
SMRTRAC solenoid (SMR) / ON or
OFFON : Operate -
THROTTLEThrottle position sensor/ Min.: 0
deg, Max.: 125 degRelease accelerator pedal:
Approx. 0 deg.
Depress accelerator pedal:
Approx. 90 deg.-
ENGINE SPDEngine Speed/ Min.: 0 rpm, Max.:
6000 rpmActual engine speed -
VEHICLE SPD Maximum wheel speed sensor
reading / min.: 0 km/h (0 MPH),
max.: 326 km/h (202 MPH) Actual vehicle speed Speed indicated on speedometer
YAW RATEYaw rate sensor/ Min.: -128 deg/
s, Max.: 128 deg/sMin.: -128 deg/s
Max.: 128 deg/s-
YAW ZERO VALUEMemorized zero value/ Min.: -128
deg/s, Max.: 128 deg/sMin.: -128 deg/s
Max.: 128 deg/s-
STEERING ANGSteering sensor/ Min.: -1152 deg,
Max.: 1150.875 degLeft turn: Increase
Right turn: Decrease-
MAS CYL PRS 1Master cylinder pressure sensor
1 reading / min.: 0 V, max.: 5 VWhen brake pedal is released :
0.3 to 0.9 VReading increases when brake
pedal is depressed
AIR BLD SUPPORTAir bleed support / NOT SUP or
SUPPORTNot supported -
SPD SEN FRFR speed sensor open detection
/ OPN DET/NORMALNORMAL -
SPD SEN FLFL speed sensor open detection /
OPN DET/NORMALNORMAL -
SPD SEN RRRR speed sensor open detection
/ OPN DET/NORMALNORMAL -
SPD SEN RLRL speed sensor open detection /
OPN DET/NORMALNORMAL -
EFI COMEFI communication open
detection / OPN DET/NORMALNORMAL -
YAWRATE SENYaw rate sensor open detection /
OPN DET/NORMALNORMAL -
DECELE SENDeceleration sensor open
detection / OPN DET/NORMALNORMAL -
STEERING SENSteering sensor sensor open
detection / OPN DET/NORMAL
NORMAL -
TEST MODE Test mode / NORMAL or TESTNORMAL : Normal mode
TEST : During test mode-
#CODESNumber of DTC recorded / min.:
0, max.: 255Min.: 0
Max.: 255- Tester Display Measurement Item/Range Normal Condition Diagnostic Note