P0717

A761E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P0717: Turbine Speed Sensor Circuit No Signal

DTC P0717 - Turbine Speed Sensor Circuit No Signal

DESCRIPTION

This sensor detects the rotation speed of the turbine, which shows the input revolution of the transmission. By comparing the input speed signal (NT) with the counter gear speed sensor signal (SP2), the ECM detects the shift timing of the gears and controls the engine torque and hydraulic pressure according to various conditions. As a result, smooth gear shifting is achieved.













1. Reference: Inspect using an oscilloscope.
Check the waveform of the ECM connector.
OK:
Refer to illustration






MONITOR DESCRIPTION

This DTC indicates that a pulse is not output from the speed sensor NT (input speed sensor) or is output only a little. The NT terminal of the ECM detects the pulse signal from the speed sensor (NT) (input RPM). The ECM outputs a gear shift signal comparing the input speed sensor (NT) with the output speed sensor (SP2).
While the vehicle is operating in 4th, 5th or 6th gear with the shift lever on D, if the input shaft revolution is less than 300 rpm*1 and the output shaft revolution is 1,000 rpm or more*2, the ECM detects the trouble, illuminates the MIL and stores the DTC.
HINT:
*1: Pulse is not output or is irregularly output.
*2: The vehicle speed is approximately 50 km/h (31 mph) or more.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.
NOTE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

1 Connect the Techstream to the DLC3.
2 Turn the ignition switch to ON.
3 Turn the Techstream on.
4 Enter the following menus: Powertrain / Engine and ECT / Data List.
5 According to the display on the Techstream, read the Data List.

Engine and ECT





HINT:
- SPD (NT) is always 0 rpm while driving:
Open or short in the sensor or circuit.
- SPD (NT) is always more than 0 rpm 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.

PROCEDURE

1. INSPECT SPEED SENSOR (INSTALLATION)




(a) Check the speed sensor NT installation.
OK:
Installation bolt is tightened properly and there is no clearance between the sensor and transmission case.
NG -- SECURELY INSTALL SPEED SENSOR OR REPLACE SPEED SENSOR
OK -- Continue to next step.
2. INSPECT SPEED SENSOR NT
(a) Disconnect the T27 sensor connector from the transmission.




(b) Measure the resistance of the sensor.
Standard resistance:






NG -- REPLACE SPEED SENSOR NT
OK -- Continue to next step.
3. CHECK WIRE HARNESS (SPEED SENSOR - ECM)




(a) Disconnect the E3 ECM connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE ECM