2001 TOYOTA SEQUOIA O2 sensor

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
D14165
Sensor Side:
(Connector Front View):
21 O1
DI±594
± DIAGNOSTICSAUTOMATIC TRANSMISSION
788 Author: Date:
2005 SEQUOIA (RM1146U)
1 Inspect speed sensor installation.
PREPARATION:
Jack up the vehicle.
CHECK:
Check the speed sensor (NT) 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 NT (See page AT±5).
OK
2 Inspect speed sensor NT.
PREPARATION:
Disconnect the speed sensor connector from the transmission.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20 C (68 F)
1 ± 2560 to 680 W
NG Replace speed sensor NT (See page AT±5).
OK

D14166
ECM:
NT+NT±E8E7E6E5E4
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±595
789 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check harness and connector (ECM ± speed sensor NT).
PREPARATION:
(a) Connect the speed sensor connector.
(b) Disconnect the ECM connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
E7 ± 35 (NT+) ± E7 ± 27 (NT±)560 to 680 W
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
E7 ± 35 (NT+) ± Body ground10 kW or higher
E7 ± 27 (NT±) ± Body ground=
NG Repair or replace the harness or connector
(See page IN±35).
OK
Replace the ECM (See page SF±80).

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

D14163
ECM
SP2+
SP2± 34
26
Y±R W±R
1 2E7
E7
E1 V2
Vehicle Speed Sensor (SP2)
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±597
791 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR DESCRIPTION
The output speed sensor SP2 monitors the output shaft speed. The ECM controls the gearshift point and
the lock up timing based on the signals from the output speed sensor SP2 and throttle position sensor.
If the ECM detects no signal from the output shaft speed sensor SP2 even while the vehicle is moving, it
will conclude that is a malfunction of the output speed sensor SP2. The ECM will illuminate the MIL and set
a DTC.
MONITOR STRATEGY
Related DTCsP0722Speed sensor SP2/Verify pulse input
Required sensors/ComponentsSpeed sensor SP2
Frequency of operationContinuous
Duration500 output shaft revolution
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not present.See page DI±545
Vehicle speed sensor pulse input4
Vehicle speed range (4 sec. or more)9 km/h (5.59 mph) or more±
NSW switchOFF
Battery voltage8 V or more±
Ignition switchON
StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Output speed sensor pulse inputNo input
WIRING DIAGRAM

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

D14165
Sensor Side:
(Connector Front View):
21 V2
D14166
ECM:
SP2+ SP2±E8E7E6E5E4
± DIAGNOSTICSAUTOMATIC TRANSMISSION
DI±599
793 Author: Date:
2005 SEQUOIA (RM1146U)
2 Inspect speed sensor SP2.
PREPARATION:
Disconnect the speed sensor connector from the transmission.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20 C (68 F)
1 ± 2560 to 680 W
NG Replace speed sensor SP2 (See page AT±5).
OK
3 Check harness and connector (ECM ± speed sensor SP2).
PREPARATION:
(a) Connect the speed sensor connector.
(b) Disconnect the ECM connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
20C (68F)
E7 ± 34 (SP2+) ± E7 ± 26 (SP2±)560 to 680 W
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSpecified Condition
E7 ± 34 (SP2+) ± Body ground10 kW or higher
E7 ± 26 (SP2±) ± Body ground=
NG Repair or replace the harness or connector
(See page IN±35).
OK
Replace the ECM (See page SF±80).

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