Toyota Sequoia (2005). Manual - part 199

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

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–591

785

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 Condition

Trouble 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.

Terminal

NT+ – NT–

Tool setting

1V/DIV, 2ms/DIV

Vehicle condition

Engine idle speed (P or N position)

DIDJ8–01

DI–592

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

786

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 DTCs

P0717

Speed sensor (NT)/Verify pulse input

R

i d

/C

t

Main

Speed sensor (NT)

Required sensors/Components

Sub

Speed sensor (NO)

Frequency of operation

Continuous

Duration

5 sec.

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

Shift change

Shift change is completed and before starting next shift change operation

ECM selected gear

4th or 5th

Output shaft rpm

1,000 rpm or more

–

NSW switch

OFF

R switch

OFF

L switch

OFF

Engine

Running

Ignition switch

ON

Starter

OFF

TYPICAL MALFUNCTION THRESHOLDS

Detection criteria

Threshold

Sensor signal rpm

Less than 300 rpm

COMPONENT OPERATING RANGE

Parameter

Standard value

Speed sensor (NT)

Input speed is equal to engine speed when lock–up ON.

D14163

ECM

NT+

NT–

35

W

B

1

2

E7

E7

O1 
O/D Direct Clutch Speed Sensor
(Input Speed Sensor NT)

E1

27

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–593

787

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 ”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 (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.

D14164

OK

NG

5.4 N·m 

(55 kgf·cm, 48 in.·lbf)

No Clearance

D14165

Sensor Side:
(Connector Front View):

2

1

O1

DI–594

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

788

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 Connection

Specified Condition

20 



C (68 



F)

1 – 2

560 to 680 

Ω

NG

Replace speed sensor NT (See page 

AT–5

).

OK