СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ, Diagnostic DTC:P0717

DESCRIPTION

This sensor detects the rotation speed of the turbine which indicates the input speed of the transmission. By comparing the input turbine speed signal NT with the output shaft speed sensor signal SP2, the TCM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. As a result, the gears shift smoothly.

Reference: Inspect using an oscilloscope.

Check the waveform of the TCM connector.

Standard
Terminal No. (Symbol) Tool Setting Condition Specified Condition C77-3 (NT+) - C77-2 (NT-) 1 V/DIV., 2 msec./ DIV. Engine idling (shift lever in P or N) Refer to illustration

MONITOR DESCRIPTION

This DTC indicates that a pulse is not output from the transmission revolution sensor (NT) or is output only a little. The NT terminal of the TCM detects the pulse signal from the transmission revolution sensor (NT). The TCM outputs a gear shift signal by comparing the transmission revolution sensor (NT) with the transmission revolution sensor (SP2).

While the vehicle is operating in 4th or 5th gear with the shift lever in D, if the input shaft speed is less than 300 rpm*1 although the output shaft speed is 1000 rpm or more*2, the TCM detects the trouble, illuminates the MIL and stores the DTC.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

1. DATA LIST

   Tech Tips

   Using the GTS 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. Warm up the engine.

   2. Turn the ignition switch off.

   3. Connect the GTS to the DLC3.

   4. Turn the ignition switch to ON.

   5. Turn the GTS on.

   6. Enter the following menus: Powertrain / ECT / Data List.

   7. According to the display on the GTS, read the Data List.

      
      Powertrain > ECT > Data List

      Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
      SPD (NT)	Input turbine speed (transmission revolution sensor (NT))	Min.: 0 rpm Max.: 12750 rpm	Lock-up on (after warming up the engine): Value from transmission revolution sensor (NT) equal to engine speed Lock-up off (idling with shift lever in N): Value from transmission revolution sensor (NT) nearly equal to engine speed	The data is displayed in increments of 50 rpm.

      
      Powertrain > ECT > Data List

      Tester Display
      SPD (NT)

      Tech Tips

      
      

      • 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 in the circuit.

PROCEDURE

1. INSPECT TRANSMISSION REVOLUTION SENSOR (NT) INSTALLATION

   
   
   1. 

      *a	CORRECT
      *b	INCORRECT

      Check the transmission revolution sensor (NT) installation.

      OK
      The installation bolt is tightened properly and there is no clearance between the sensor and transmission case.

      Result
      Proceed to OK NG

   
   

   NG

   SECURELY INSTALL OR REPLACE TRANSMISSION REVOLUTION SENSOR (NT) Click here

   OK

2. INSPECT TRANSMISSION REVOLUTION SENSOR (NT)

   
   
   1. 

      *a	Component without harness connected (Transmission Revolution Sensor (NT))

      Disconnect the transmission revolution sensor (NT) connector.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 560 to 680 Ω

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE TRANSMISSION REVOLUTION SENSOR (NT) Click here

   OK

3. CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NT) - TCM)

   
   
   1. 

      *a	Rear view of wire harness connector (to TCM)

      Disconnect the TCM connector.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition C77-3 (NT+) - C77-2 (NT-) 20°C (68°F) 560 to 680 Ω C77-3 (NT+) - Body ground Always 10 kΩ or higher C77-2 (NT-) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE TCM Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR