2001 TOYOTA SEQUOIA engine

DI±588
± DIAGNOSTICSAUTOMATIC TRANSMISSION
782 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0711 Transmission Fluid Temperature Sensor ºAº
Performance
CIRCUIT DESCRIPTION
See page DI±582.
DTC No.DTC Detection ConditionTrouble Area
P0711
Both (a) and (b) are detected: (2±trip detection logic)
(a) Intake air and engine coolant temps. are more than ±20°C
(±4F) at engine start
(b) After normal driving for over 22 min. and 9 km (6 mile) or
more, ATF temp. is less than 10°C (50F)

Transmission wire (ATF temperature sensor No.1)
MONITOR DESCRIPTION
This DTC indicates that there is a problem with output from the automatic transmission fluid (ATF) tempera-
ture sensor and that the sensor itself is defective. The ATF temperature sensor converts the ATF tempera-
ture 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 20C (68F) after running the vehicle for a certain period, the ECM interprets this as a fault, and
turns on the MIL.
MONITOR STRATEGY
Related DTCsP0711ATF temperature sensor/Rationality check
Required sensors/ComponentsATF temperature sensor (TFT sensor)
Frequency of operationContinuous
Duration3 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not present.See page DI±545
TFT (transmission fluid temperature) sen-
sor circuitNot circuit malfunction
ECT (Engine coolant temperature) sensor
circuitNot circuit malfunction
IAT (Intake air temperature) sensor circuitNot circuit malfunction
Time after engine start21 min. and 40 sec.
Driving distance after engine start9 km (5.6 mile) or more±
IAT (12 sec. after engine start)±10°C (14°F) or more±
ECT (12 sec. after engine start)±10°C (14°F) or more±
DIDJ7±01

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±589
783 Author: Date:
2005 SEQUOIA (RM1146U)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
TFT (transmission fluid temperature)Less than 20°C (68°F)
(varies with TFT (transmission fluid temperature) at engine start)
WIRING DIAGRAM
See page DI±582.
INSPECTION PROCEDURE
HINT:
According to the DATA LIST displayed by the OBD II scan tool or hand±held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of
troubleshooting is one method to shorten labor time.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the OBD II scan tool or hand±held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Push the ºONº button of the OBD II scan tool or the hand±held tester.
(f) When you use the hand±held tester:
Select the item ºDIAGNOSIS / ENHANCED OBD II / DATA LISTº.
(g) According to the display on the tester, read the ºDATA LISTº.
ItemMeasurement Item/
Range (display)Normal Condition
AT FLUID TEMP 1
ATF Temp. Sensor Value/
min.: ±40C (±40F)
max.: 215C (419F)
After Stall Test;
Approx. 80C (176F)

Equal to ambient temperature when cold soak
HINT:
When DTC P0712 is output and hand±held tester output is 150C (302F) or more, there is a short circuit.
When DTC P0713 is output and hand±held tester output is ±40C (±40F), there is an open circuit.
Measure the resistance between terminal THO1 (OT) and body ground.
Temperature DisplayedMalfunction
±40°C (±40°F)Open circuit
150°C (302°F) or moreShort circuit
HINT:
If a circuit related to the ATF temperature sensor becomes 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.

D14162
Clutch Drum
(Timing Rotor)
Input Speed Sensor NT
(Transmission Revolution Sensor NT)Output Speed Sensor SP2
(Transmission Revolution Sensor SP2)
Parking Gear
(Timing Rotor)
D14148
GND
1 V/DIV
2 ms/DIV
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±591
785 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0717 Input Speed Sensor Circuit No Signal
CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the turbine which shows the input revolution of transmission. By
comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (SP2), the ECM
detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure ac-
cording to various conditions, thus, providing smooth gear shift.
DTC No.DTC Detection ConditionTrouble Area
P0717
All conditions below are detected for 5 secs. or more
(1±trip detection logic)
(a) Gear change is not performed
(b) Gear position: 4th or 5th
(c) T/M input shaft rpm: 300 rpm or less
(d) T/M output shaft rpm: 1,000 rpm or more
(e) Park/neutral position switch:

NSW input signal is OFF

R input signal is OFF

L input signal is OFF
(f) Shift solenoid valves, park/neutral position switch and ve-
hicle speed sensor are in normal operation

Open or short in speed sensor (NT) circuit

Speed sensor (NT)

ECM

Automatic transmission (clutch, brake or gear, etc.)
Reference (Using an oscilloscope):
Check the waveform between terminals NT+ and NT± of
the ECM connector.
Standard: Refer to the illustration.
TerminalNT+ ± NT±
Tool setting1V/DIV, 2ms/DIV
Vehicle conditionEngine idle speed (P or N position)
DIDJ8±01

DI±592
± DIAGNOSTICSAUTOMATIC TRANSMISSION
786 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR DESCRIPTION
This DTC indicates that pulse is not output from the speed sensor NT (Turbine (input) speed sensor ) or is
output only little. The NT terminal of the ECM detects the revolving signal from the speed sensor (NT) (input
RPM). The ECM outputs a gearshift signal comparing the
input speed sensor (NT) with the output speed
sensor (SP2).
While the vehicle is operating in the 4th or 5th gear position in the shift position of D, if the input shaft revolu-
tion is less than 300 rpm
*1 although the output shaft revolution is more than 1000 rpm or more*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 approx. 50 km/h (31 mph) or more.
MONITOR STRATEGY
Related DTCsP0717Speed sensor (NT)/Verify pulse input
Rid /C tMainSpeed sensor (NT)Required sensors/ComponentsSubSpeed sensor (NO)
Frequency of operationContinuous
Duration5 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not present.See page DI±545
Shift changeShift change is completed and before starting next shift change operation
ECM selected gear4th or 5th
Output shaft rpm1,000 rpm or more±
NSW switchOFF
R switchOFF
L switchOFF
EngineRunning
Ignition switchON
StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Sensor signal rpmLess than 300 rpm
COMPONENT OPERATING RANGE
ParameterStandard value
Speed sensor (NT)Input speed is equal to engine speed when lock±up ON.

D14163
ECM
NT+
NT± 35
WB
1 2E7
E7 O1
O/D Direct Clutch Speed Sensor
(Input Speed Sensor NT)
E1 27
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±593
787 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
According to the DATA LIST displayed by the OBD II scan tool or hand±held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of
troubleshooting is one method to shorten labor time.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the OBD II scan tool or hand±held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Push the ºONº button of the OBD II scan tool or the hand±held tester.
(f) When you use the hand±held tester:
Select the item ºDIAGNOSIS / ENHANCED OBD II / DATA LISTº.
(g) According to the display on the tester, read the ºDATA LISTº.
ItemMeasurement Item/
Range (display)Normal Condition
SPD (NT)Input Turbine Speed/
display: 50 r/min
[HINT]

Lock±up ON (After warming up the engine);
Input Turbine speed (NT) equal to the engine
speed.

Lock±up OFF (Idling at N position);
Input Turbine speed (NT) nearly equal to the en-
gine speed.
HINT:

SPD (NT) is always 0 while driving:
Open or short in the sensor or circuit.

SPD (NT) is always more than 0 and less than 300 rpm while driving the vehicle at 50 km/h (31 mph)
or more:
Sensor trouble, improper installation, or intermittent connection trouble of the circuit.

D14164OK NG
5.4 N´m
(55 kgf´cm, 48 in.´lbf)
No Clearance
DI±598
± DIAGNOSTICSAUTOMATIC TRANSMISSION
792 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
According to the DATA LIST displayed by the OBD II scan tool or hand±held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of
troubleshooting is one method to shorten labor time.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the OBD II scan tool or hand±held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Push the ºONº button of the OBD II scan tool or the hand±held tester.
(f) When you use the hand±held tester:
Select the item ºDIAGNOSIS / ENHANCED OBD II / DATA LISTº.
(g) According to the display on the tester, read the ºDATA LISTº.
ItemMeasurement Item/
Range (display)Normal Condition
SPD (SP2)
Output shaft Speed/
min.: 0 km/h (0 mph)
max.: 255 km/h (158 mph)Vehicle stopped: 0 km/h (0 mph)
[HINT]
Equal to vehicle speed
HINT:

SPD (SP2) is always 0 while driving:
Open or short in the sensor or circuit.

SPD (SP2) is always more than 0 and less than 300 rpm while driving the vehicle at 50 km/h (31 mph)
or more:
Sensor trouble, improper installation, or intermittent connection trouble of the circuit.
1 Inspect speed sensor installation.
PREPARATION:
Jack up the vehicle.
CHECK:
Check the speed sensor (SP2) installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and transmission
case.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)
NG Replace speed sensor SP2 (See page AT±5).
OK

DI±600
± DIAGNOSTICSAUTOMATIC TRANSMISSION
794 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0724 Brake Switch ºBº Circuit High
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while driving in lock±up condition when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signal to the ECM. Then the ECM cancels the opera-
tion of the lock±up clutch while braking is in progress.
DTC No.DTC Detection ConditionTrouble Area
P0724
The stop light switch remains ON even when the vehicle is
driven in a STOP (less than 3 km/h (2 mph)) and GO (30 km/h
(19 mph) or more) fashion 5 times. (2±trip detection logic).
Short in stop light switch signal circuit

Stop light switch

ECM
MONITOR DESCRIPTION
This DTC indicates that the stop light switch remains on. When the stop light switch remains ON during ºstop
and goº driving, the ECM interprets this as a fault in the stop light switch and the MIL comes on and the ECM
stores the DTC. The vehicle must stop (less than 3 km/h (2 mph)) and go (30 km/h (19 mph) or more) ten
times for two driving cycles in order to detect a malfunction.
MONITOR STRATEGY
Related DTCsP0724Stop light switch/Range check/Rationality
Rid /C tMainStop light switchRequired sensors/ComponentsSubVehicle speed sensor
Frequency of operationContinuous
DurationGO and STOP 5 times
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not present.See page DI±545
Battery voltage8 V or more±
Ignition switchON
StarterOFF
GO (Vehicle speed is 30 km/h
(18.63 mph) or more)Once
STOP (Vehicle speed is less than 3 km/h
(1.86 mph))Once
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Brake switchRemain ON during GO and STOP 5 times
DIDJA±01

± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±601
795 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
See page DI±283.
INSPECTION PROCEDURE
1 Read value of DATA LIST (STP signal).
HINT:
According to the DATA LIST displayed by the OBD II scan tool or hand±held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of
troubleshooting is one method to shorten labor time.
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the OBD II scan tool or hand±held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Push the ºONº button of the OBD II scan tool or the hand±held tester.
(f) When you use the hand±held tester:
Select the item ºDIAGNOSIS / ENHANCED OBD II / DATA LISTº.
(g) According to the display on the tester, read the ºDATA LISTº.
Standard:
ItemMeasurement Item/
Range (display)Normal Condition
Stop Light SwitchStop light SW Status/
ON or OFF
Brake Pedal is depressed: ON

Brake Pedal is released: OFF
NOTICE:
In the table above, the conditions listed under ºNormal Conditionº are reference conditions. Do not
depend solely on these reference conditions when deciding whether a part is faulty or not.
OK:
Brake Pedal ConditionSpecified Condition
DepressedON
ReleasedOFF
NG Go to step 2.
OK
Go to step 3.