2001 TOYOTA SEQUOIA terminal TC

D14157
O E1 Electronically Controlled
Transmission Solenoid
OT±O
OT+
L
OT2±L
OT2+ G±W
G±W
G±WG
B±L
G±W 2
110
9E7
E7
E828 32 24
THO2 THO1
E2ECM
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±585
779 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
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.

± 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.

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)
C13480D14149
GND
2 V/DIV
20 ms/DIV
DI±596
± DIAGNOSTICSAUTOMATIC TRANSMISSION
790 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0722 Output Speed Sensor Circuit No Signal
CIRCUIT DESCRIPTION
The speed sensor SP2 detects the rotation speed of the transmission output shaft and sends signals to the
ECM. The ECM determines the vehicle speed based on these signals. An AC voltage is generated in the
speed sensor SP2 coil as the parking gear mounted on the rear planetary gear assy rotates, and this voltage
is sent to the ECM. The parking gear on the rear planetary gear is used as the timing rotor for this sensor.
The gear shift point and lock±up timing are controlled by the ECM based on the signals from this vehicle
speed sensor and the throttle position sensor signal.
DTC No.DTC Detection ConditionTrouble Area
P0722
All conditions below are detected 500 times or more continu-
ously (1±trip detection logic)
(a) No signal from speed sensor (SP2) is input to ECM while 4
pulses of No. 1 vehicle speed sensor signal are sent
(b) Vehicle speed is 9 km/h (6 mph) or more for at least 4 sec.
(c) Park/neutral position switch is OFF.
(d) Transfer position is except neutral (4WD).

Open or short in speed sensor (SP2) circuit

Speed sensor (SP2)

ECM

Automatic transmission (clutch, brake or gear, etc.)
Reference (Using an oscilloscope):
Check the waveform between terminals SP2+ and SP2±
of the ECM connector.
Standard: Refer to the illustration.
TerminalSP2+ ± SP2±
Tool setting2V/DIV, 20ms/DIV
Vehicle conditionVehicle speed 20 km/h (12 mph)
DIDJ9±01

D12795
12
(±)(+)
12
Shift Solenoid Valve SL1:
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±607
801 Author: Date:
2005 SEQUOIA (RM1146U)
3 Inspect shift solenoid valve SL1.
PREPARATION:
Remove the shift solenoid valve SL1 (See page AT±10).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
1 ± 25.0 to 5.6 W
CHECK:
Connect the positive (+) lead with a 21 W bulb to terminal 2 and
the negative (±) lead to terminal 1 of the solenoid valve connec-
tor, then check the movement of the valve.
OK:
The solenoid makes an operating sound.

NG Replace the shift solenoid valve SL1
(See page AT±10).
OK
Repair or replace the transmission wire
(See page AT±7).

D11991
Shift solenoid S1:
(+) (±)
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±613
807 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check shift solenoid valve S1 operation.
PREPARATION:
Remove the shift solenoid valve S1 (See page AT±10).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
Solenoid Connector (S1) ± Solenoid
Body (S1)11 to 15 W
CHECK:
Connect the positive (+) lead to the terminal of the solenoid con-
nector, and the negative (±) lead to the solenoid body.
OK:
The solenoid makes an operating sound.
NG Replace shift solenoid valve S1
(See page AT±10).
OK
3 Inspect valve body (See page AT±10).
OK:
There are no foreign objects on each valve.
NG Repair or replace valve body.
OK
Repair or replace transmission (See page
AT±25).

D11992
Shift solenoid S2:
(+) (±)
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±619
813 Author: Date:
2005 SEQUOIA (RM1146U)
2 Inspect shift solenoid valve S2 operation.
PREPARATION:
Remove the shift solenoid valve S2 (See page AT±10).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
Solenoid Connector (S2) ± Solenoid
Body (S2)11 to 15 W
CHECK:
Connect the positive (+) lead to the terminal of the solenoid con-
nector, and the negative (±) lead to the solenoid body.
OK:
The solenoid makes an operating sound.
NG Replace shift solenoid valve S2
(See page AT±10).
OK
3 Inspect valve body (See page AT±10).
OK:
There are no foreign objects on each valve.
NG Repair or replace valve body.
OK
Repair or replace transmission (See page
AT±25).