Toyota Sequoia (2005). Manual - part 200

D14166

ECM:

NT+

NT–

E8

E7

E6

E5

E4

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–595

789

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 Connection

Specified Condition

20



C (68



F)

E7 – 35 (NT+) – E7 – 27 (NT–)

560 to 680 

Ω

CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Specified Condition

E7 – 35 (NT+) – Body ground

10 k

Ω

 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)

C13480

D14149

GND

2 V/DIV

20 ms/DIV

DI–596

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

790

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 Condition

Trouble 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.

Terminal

SP2+ – SP2–

Tool setting

2V/DIV, 20ms/DIV

Vehicle condition

Vehicle speed 20 km/h (12 mph)

DIDJ9–01

D14163

ECM

SP2+

SP2–

34

26

Y–R

W–R

1

2

E7

E7

E1

V2
Vehicle Speed Sensor (SP2)

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–597

791

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 DTCs

P0722

Speed sensor SP2/Verify pulse input

Required sensors/Components

Speed sensor SP2

Frequency of operation

Continuous

Duration

500 output shaft revolution

MIL operation

Immediate

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

It

Specification

Item

Minimum

Maximum

The monitor will run whenever this DTC is

not present.

See page 

DI–545

Vehicle speed sensor pulse input

4

Vehicle speed range (4 sec. or more)

9 km/h (5.59 mph) or more

–

NSW switch

OFF

Battery voltage

8 V or more

–

Ignition switch

ON

Starter

OFF

TYPICAL MALFUNCTION THRESHOLDS

Detection criteria

Threshold

Output speed sensor pulse input

No input

WIRING DIAGRAM

D14164

OK

NG

5.4 N·m 

(55 kgf·cm, 48 in.·lbf)

No Clearance

DI–598

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

792

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 ”ON” button of the OBD II scan tool or the hand–held tester.

(f)

When you use the hand–held tester:
Select the item ”DIAGNOSIS / ENHANCED OBD II / DATA LIST”.

(g)

According to the display on the tester, read the ”DATA LIST”.

Item

Measurement 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