2007 TOYOTA SIENNA automatic transmission

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–51
AX
MONITOR DESCRIPTION
These DTCs indicate an open or short in the automatic transmission fluid (ATF) temperature sensor (TFT
sensor) circuit. The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to
an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, and
the ECM detects an opens or shorts in the ATF temperature circuit. If the resistance value of the ATF
temperature is less than 79
*1or more than 156 k *2, the ECM interprets this as a fault in the ATF
sensor or wiring. The ECM will turn on the MIL and store the DTC.
*1: 150
C (302F) or more is indicated regardless of the actual ATF temperature.
*2: -40
C (-40F) is indicated regardless of the actual ATF temperature.
HINT:
The ATF temperature can be checked on the OBD II scan tool or intelligent tester display.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
P0710: Range check (Chattering)
P0712: Range check (Low resistance)
P0713: Range check (High resistance)
TYPICAL MALFUNCTION THRESHOLDS
P0710: Range check (Chattering)
P0712: Range check (Low resistance)
P0713: Range check (High resistance)
P0712ATF temperature sensor resistance is less than 79
for 0.5 sec. or more (1-trip detection logic)• Short in ATF temperature sensor circuit
• Transmission wire (ATF temperature sensor)
•ECM
P0713ATF temperature sensor resistance is more than 156
k
when 15 minutes or more have elapsed after the
engine start
DTC is detected for 0.5 sec. or more (1-trip detection
logic)• Open in ATF temperature sensor circuit
• Transmission wire (ATF temperature sensor)
•ECM
Related DTCsP0710: ATF temperature sensor/Range check (Chattering)
P0712: ATF temperature sensor/Range check (Low resistance)
P0713: ATF temperature sensor/Range check (High resistance)
Required sensors/Components ATF temperature sensor (TFT sensor)
Frequency of operation Continuous
Duration 0.5 sec.
MIL operation Immediate
Sequence of operation None
The monitor will run whenever these DTCs are not present. None
The typical enabling condition is not available. -
The monitor will run whenever this DTC is not present. None
Time after engine start 15 min. or more
TFT (Transmission fluid temperature) sensor resistanceLess than 79
or
More than 156 k
TFT sensor resistanceLess than 79
TFT sensor resistance More than 156 k
DTC No. DTC Detection Condition Trouble Area

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–53
AX
Measure the resistance between terminal THO1 (THO) and body ground.
HINT:
If a circuit related to the ATF temperature sensor become open, P0713 is immediately set (in 0.5
second).
When P0713 is set, P0711 cannot be detected.
It is not necessary to inspect the circuit when P0711 is set.
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
HINT:
If the resistance is out of the specified range with either
the ATF temperature shown in the table below, the
driveability of the vehicle may decrease.
NG
OK
(a) Connect the transmission wire connector to the
transaxle.
(b) Disconnect the ECM connectors.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(d) Measure the resistance according to the value(s) in the
table below.
Temperature Displayed Malfunction
-40
C (-40F) Open circuit
150
C (302F) or more Short circuit
1INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)
C113969E35
Tester Connection Specified Condition
1 (THO) - 7 (E2) 79
to 156 k
1 (THO) - Body ground 10 k or higher
7 (E2) - Body ground
ATF Temperature Specified Condition
10
C (50F) 5 to 8 k
25C (77F) 2.5 to 4.5 k
11 0C (230F) 0.22 to 0.28 k
REPAIR OR REPLACE TRANSMISSION
WIRE
2CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
G038618E15
Tester Connection Specified Condition
E10-24 (THO1) - E9-28 (E2) 79
to 156 k

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–55
AX
DESCRIPTION
The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a
resistance value which is input into the ECM.
MONITOR DESCRIPTION
The ATF temperature sensor converts the ATF temperature to an electrical resistance value. Based on
the resistance, the ECM determines the ATF temperature and detects an open or short in the ATF
temperature circuit or a fault in the ATF temperature sensor.
After running the vehicle for a certain period, the ATF temperature should increase. If the ATF
temperature is below 20
C (68F) after running the vehicle for a certain period, the ECM interprets this as
a fault, and turns on the MIL.
When the ATF temperature is 110
C (230F) or more after 17 minutes of engine cold start, the ECM also
determines this as a fault, turns on the MIL, and stores the DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
Condition (A):
Condition (B):
DTC P0711Transmission Fluid Temperature Sensor "A"
Performance
DTC No. DTC Detection Condition Trouble Area
P0711(A) Both (a) and (b) are detected: (2-trip detection logic)
(a) Intake air and engine coolant temperatures are
more than -10
C (14F) at engine start
(b) After normal driving for over 19 min. and 9 km (6
mile) or more, ATF temp. is less than 20
C (68F)
(B) When engine coolant temp. is less than 35
C (95F)
at engine start, the ATF temp. is 110C (230F) or more
after 17 min. of engine start (2-trip detection logic).Transmission wire (ATF temperature sensor)
Related DTCs P0711: ATF temperature sensor/Rationality check
Required sensors/Components ATF temperature sensor (TFT sensor)
Frequency of operation Continuous
Duration3 sec.: Condition (A), (B), (C)
Continuous.: Condition (D)
MIL operation 2 driving cycles
Sequence of operation None
The monitor will run whenever this DTC is not present. None
TFT sensor circuitNot circuit malfunction
ECT sensor circuitNot circuit malfunction
IAT sensor circuitNot circuit malfunction
ETCSNot circuit malfunction
Time after engine start 18 min. and 20 sec.
Driving distance after engine start 9 km (5.6 mile) or more
IAT (Intake air temperature) (12 sec. after starting engine) -10
C (14F) or more
ECT (12 sec. after starting engine) -10
C (14F) or more
Time after engine start 30 min.
Driving distance after engine start 15 km (9.3 mile) or more

AX–58U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
OK:
Automatic transmission fluid level is correct.
NG
OK
2CHECK TRANSMISSION FLUID LEVEL
ADD FLUID
REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–59
AX
DESCRIPTION
This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal
(NT) with the counter gear speed sensor signal (NC), the ECM detects the shift timing of the gears and
appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus,
providing smooth gear shift.
Reference (Using an oscilloscope):
Check the waveform between terminals NT+ and NT- of the ECM connector.
Standard: Refer to the illustration.
MONITOR DESCRIPTION
The NT terminal of the ECM detects a revolution signal from the speed sensor (NT) (input RPM). The
ECM calculates a gearshift comparing the speed sensor (NT) with the speed sensor (NC).
While the vehicle is operating in 2nd, 3rd, 4th or 5th gear in the shift position of D, if the input shaft
revolution is less than 300 rpm
*1although the output shaft revolution is more than 1,000 rpm *2, the ECM
detects the trouble, illuminates the MIL and stores the DTC.
*1: Pulse is not output or is irregularly output.
*2: The vehicle speed is 50 km/h (31 mph) or more.
MONITOR STRATEGY
DTC P0717 Turbine Speed Sensor Circuit No Signal
DTC No. DTC Detection Condition Trouble Area
P0717ECM detects conditions (a), (b) and (c) continuously for
5 sec. or more: (1-trip detection logic)
(a) Vehicle speed: 50 km/h (31 mph) or more
(b) Park/neutral position switch (NSW (STAR) and R) is
OFF
(c) Speed sensor (NT): less than 300 rpm• Open or short in transmission revolution sensor NT
(speed sensor NT) circuit
• Transmission revolution sensor NT (speed sensor
NT)
•ECM
• Automatic transaxle assembly
Te r m i n a l N T + - N T -
Tool setting 5 V/DIV., 0.5 ms./DIV.
Vehicle condition Vehicle speed 20 km/h (12 mph)
Related DTCs P0717: Speed sensor (NT)/Verify pulse input
Required sensors/Components Speed sensor (NT), Speed sensor (NC)
Frequency of operation Continuous
Duration 5 sec.
MIL operation Immediate
Sequence of operation None
C053419E13

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–67
AX
SYSTEM DESCRIPTION
The ECM uses the signals from the throttle position sensor, air-flow meter, turbine (input) speed sensor,
intermediate (counter) shaft speed sensor and crankshaft position sensor to monitor the engagement
condition of the lock-up clutch.
Then the ECM compares the engagement condition of the lock-up clutch with the lock-up schedule in the
ECM memory to detect a mechanical problems of the shift solenoid valve DSL, valve body and torque
converter clutch.
MONITOR DESCRIPTION
Torque converter lock-up is controlled by the ECM based on the speed sensor (NT), speed sensor (NC),
engine rpm, engine load, engine temperature, vehicle speed, transmission temperature, and gear
selection. The ECM determines the lock-up status of the torque converter by comparing the engine rpm
(NE) to the input turbine rpm (NT). The ECM calculates the actual transmission gear by comparing input
turbine rpm (NT) to counter gear rpm (NC). When conditions are appropriate, the ECM requests "lock-up"
by applying control voltage to the shift solenoid DSL. When the DSL is turned on, it applies pressure to the
lock-up relay valve and locks the torque converter clutch.
If the ECM detects no lock-up after lock-up has been requested or if it detects lock-up when it is not
requested, the ECM interprets this as a fault in the shift solenoid valve DSL or lock-up system
performance. The ECM will turn on the MIL and store the DTC.
HINT:
Example:
When any of the following is met, the system judges it as a malfunction.
• There is a difference in rotation between the input side (engine speed) and output side (input turbine
speed) of the torque converter when the ECM commands lock-up.
(Engine speed is at least 100 rpm greater than input turbine speed.)
• There is no difference in rotation between the input side (engine speed) and output side (input turbine
speed) of the torque converter when the ECM commands lock-up off.
(The difference between engine speed and input turbine speed is less than 35 rpm.)
MONITOR STRATEGY
DTC P0741Torque Converter Clutch Solenoid Performance
(Shift Solenoid Valve DSL)
DTC No. DTC Detection Condition Trouble Area
P0741Lock-up does not occur when driving in the lock-up
range (normal driving at 80 km/h [50 mph]), or lock up
remains ON in the lock-up OFF range.
(2-trip detection logic)• Shift solenoid valve DSL remains open or closed
• Valve body is blocked
• Torque converter clutch
• Automatic transaxle (clutch, brake or gear etc.)
• Line pressure is too low
Related DTCsP0741:
Shift solenoid valve DSL/OFF malfunction
Shift solenoid valve DSL/ON malfunction
Required sensors/ComponentsShift solenoid valve DSL, Speed sensor (NT), Speed sensor (NC),
Crankshaft position sensor (NE), Throttle position sensor (VPA1),
Mass air flow sensor (MAF), Transmission temperature sensor
(THO1), Engine coolant temperature sensor (ECT)
Frequency of operation Continuous
DurationOFF malfunction (A)
Continuous.
OFF malfunction (B)
1 sec.
OFF malfunction (C)
3.5 sec.
ON malfunction
1.8 sec.

AX–68U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
TYPICAL ENABLING CONDITIONS
All:
OFF malfunction (A):
OFF malfunction (B):
OFF malfunction (C):
ON malfunction:
TYPICAL MALFUNCTION THRESHOLDS
Either of the following conditions is met: OFF malfunction or ON malfunction OFF malfunction:
ON malfunction:
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
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
Electronic throttle systemNot circuit malfunction
ECM selected gear3rd
Throttle valve opening angle4.5% or more at engine speed gear 1,900 rpm (varies with engine
speed)
ECM selected gear5th
Vehicle speed10 km/h (6.2 mph) or more
ECM lock-up commandON
ECM selected gear3rd, 4th or 5th
Vehicle speed25 km/h (15.5 mph) or more
ECM lock-up commandOFF
ECM selected gear3rd, 4th or 5th
Throttle valve opening angle7% or more
Vehicle speed25 to 60 km/h (15.5 to 37.3 mph)
Engine Speed - Input (turbine) speed 100 rpm or more
Difference between engine speed and input (turbine) speed Less than 35 rpm

AX–70U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
(a) Connect the intelligent tester together with the CAN VIM
(controller area network vehicle interface module) to the
DLC3.
(b) Turn the ignition switch to the ON position and turn the
OBD II scan tool or the intelligent tester main switch ON.
(c) When you use intelligent tester:
Select the item "DIAGNOSIS / ENHANCED OBD II /
DTC INFO / CURRENT CODES".
(d) Read the DTCs using the OBD II scan tool or the
intelligent tester.
Result
HINT:
If any other codes besides "P0741" are output, perform
the troubleshooting for those DTCs first.
B
A
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
1CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0741)
Result Proceed to
P0741 A
P0741 and other DTCs B
GO TO DTC CHART
2INSPECT TRANSMISSION WIRE (DSL)
C113969E02
Tester ConnectionSpecified Condition
20C (68F)
10 (DSL) - Body ground 11 to 13
Go to step 4