2007 TOYOTA SIENNA automatic transmission fluid

AX–50U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
DESCRIPTION
The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a
resistance value which is input into the ECM.
The ECM applies a voltage to the temperature sensor through ECM terminal THO1.
The sensor resistance changes with the transmission fluid temperature. As the temperature becomes
higher, the sensor resistance decreases.
One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage goes
down as the temperature becomes higher.
The ECM calculates the fluid temperature based on the voltage signal.
DTC P0710Transmission Fluid Temperature Sensor "A"
Circuit
DTC P0712Transmission Fluid Temperature Sensor "A"
Circuit Low Input
DTC P0713Transmission Fluid Temperature Sensor "A"
Circuit High Input
DTC No. DTC Detection Condition Trouble Area
P0710(a) and (b) are detected momentarily within 0.5 sec.
when neither P0712 nor P0713 is detected (1-trip
detection logic)
(a) ATF temperature sensor resistance is less than 79
.
(b) ATF temperature sensor resistance is more than
156 k
.
HINT:
Within 0.5 sec., the malfunction switches from (a) to (b)
or from (b) to (a)• Open or short in ATF temperature sensor circuit
• Transmission wire (ATF temperature sensor)
•ECM
G031389E12

U151F 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

U151F 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–58U151F 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)

AX–68U151F 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

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–73
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.
HINT:
Example:
When either condition (a) or (b) is met, the ECM detects a malfunction.
(a) The ECM commands the 1st gear, but the actual gear is 2nd.
(b) The ECM commands the 2nd gear, but the actual gear is 1st.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
ALL:
DTC P0746Pressure Control Solenoid "A" Performance
(Shift Solenoid Valve SL1)
DTC No. DTC Detection Condition Trouble Area
P0746The gear required by the ECM does not match the
actual gear when driving (2-trip detection logic)• Shift solenoid valve SL1 remains open or closed
• Valve body is blocked
• Automatic transaxle (clutch, brake or gear etc.)
Related DTCsP0746:
Shift solenoid valve SL1/OFF malfunction
Shift solenoid valve SL1/ON malfunction
Required sensors/ComponentsShift solenoid valve SL1, Speed sensor (NT), Speed sensor (NC), Crankshaft
position sensor (NE)
Frequency of operation Continuous
Duration 0.8 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–81
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 P0766Shift Solenoid "D" Performance (Shift Solenoid
Valve S4)
DTC No. DTC Detection Condition Trouble Area
P0766The gear required by the ECM does not match the
actual gear when driving (2-trip detection logic)• Shift solenoid valve S4 remains open or closed
• Valve body is blocked
• Automatic transaxle (clutch, brake or gear etc.)
Related DTCsP0766:
Shift solenoid valve S4/OFF malfunction
Shift solenoid valve S4/ON malfunction
Required sensors/ComponentsShift solenoid valve S4, Speed sensor (NT), Speed sensor (NC), Crankshaft
position sensor (NE)
Frequency of operation Continuous
DurationOFF malfunction (A) and ON malfunction (B)
1 sec.
OFF malfunction (B)
1.2 sec.
ON malfunction (A)
0.8 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
Shift solenoid valve SL3 circuit Not circuit malfunction

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