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DI-1008
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E for 1GR-FE)
DIDVB-01
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.
Clutch Drum
Output Speed Sensor SP2
(Timing Rotor)
(Transmission Revolution Sensor SP2)
Parking Gear
(Timing Rotor)
Input Speed Sensor NT
(Transmission Revolution Sensor NT)
D14162
DTC No. DTC Detection Condition Trouble Area
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 S Open or short in speed sensor (NT) circuit
(d) T/M output shaft rpm: 1,000 rpm or more S Speed sensor (NT)
P0717
(e) Park/neutral position switch: S ECM
NSW input signal is OFF S Automatic transmission (clutch, brake or gear, etc.)
R input signal is OFF
L input signal is OFF
(f) Shift solenoid valves and park/neutral position switch are in
normal operation
Reference (Using an oscilloscope):
1 V/DIV Check the waveform between terminals NT+ and NT- of
the ECM connector.
Standard: Refer to the illustration.
GND Terminal NT+ - NT-
Tool setting 1V/DIV, 2ms/DIV
Vehicle condition Engine idle speed (P or N position)
2 ms/DIV
D14148
DI-1009
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E for 1GR-FE)
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
Main Speed sensor (NT)
Required sensors/Components
R i d /C t
Sub Speed sensor (NO)
Frequency of operation Continuous
Duration 5 sec.
MIL operation Immediate
Sequence of operation None
TYPICAL ENABLING CONDITIONS
Specification
It
Item
Minimum Maximum
The monitor will run whenever this DTC is
See page DI-963
not present.
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
NSW switch fail Not detected
Battery voltage 8 V or more
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.
DI-1010
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E for 1GR-FE)
WIRING DIAGRAM
O1
ECM
O/D Direct Clutch Speed Sensor
(Input Speed Sensor NT) 35
G NT+
E6
2 1
27
R NT-
E6
E1
D14163
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".
Measurement Item/
Item Normal Condition
Range (display)
[HINT]
S Lock-up ON (After warming up the engine);
Input Turbine speed (NT) equal to the engine
Input Turbine Speed/
SPD (NT) speed.
display: 50 r/min
S Lock-up OFF (Idling at N position);
Input Turbine speed (NT) nearly equal to the en-
gine speed.
HINT:
S SPD (NT) is always 0 while driving:
Open or short in the sensor or circuit.
S 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.
DI-1011
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E for 1GR-FE)
1 Inspect speed sensor installation.
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