DTC    P0715    Input/Turbine Speed Sensor "A" Circuit

DTC    P0717    Input/Turbine Speed Sensor "A" Circuit No Signal

for Preparation Click here


DESCRIPTION

The ECM receives a signal from the turbine speed sensor (transmission revolution sensor (NT)) installed in the continuously variable transaxle to control the lock up engagement pressure and forward clutch pressure.
The transmission revolution sensor (NT) detects the continuously variable transaxle input shaft speed and sends it to the ECM.

DTC No.
DTC Detection Condition
  1. Diagnosis Condition
  2. Malfunction Status
  3. Malfunction Time
  4. Other
Trouble Area
P0715
  1. Transmission revolution sensor (NT) signal malfunction is not detected
  2. Transmission revolution sensor (NT) input voltage is less than 0.1 V, or more than 1.9 V
  3. 2 seconds
  4. 1-trip detection logic
  1. Open or short speed sensor NT circuit
  2. Transmission revolution sensor (NT)
  3. ECM
P0717
  1. Driving with the shift lever in D, output shaft speed of 300 rpm or more, and no error detected from the park/neutral switch
  2. Transmission revolution sensor (NT) Speed: Less than 300 rpm
  3. 2 seconds
  4. 1-trip detection logic
  1. Open or short speed sensor NT circuit
  2. Transmission revolution sensor (NT)
  3. ECM

MONITOR DESCRIPTION

The turbine speed sensor detects the transaxle input shaft speed. The ECM determines the gear shift timing based on a comparison of the turbine speed sensor (input shaft speed) with the output speed sensor (output shaft speed).
When the output shaft speed is higher than the expected value and the input shaft speed is less than 300 rpm while running with the shift lever in the D position, the ECM will conclude that there is malfunction of the transmission revolution sensor (NT). The ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM


C195846E01


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (SPD (NT) AND NT SENSOR VOLTAGE)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List.

  1. In accordance with the display on the tester, read the Data List.

    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    SPD (NT)
    		Input turbine speed/
    display: 50 rpm
    min.: 0 rpm
    max.: 12750 rpm
    		Lock-up ON (After warming up engine): Input turbine speed (NT) equal to engine speed
    		-
    Lock-up OFF (Idling at P or N position):
    Input turbine speed (NT) nearly equal to engine speed
    Vehicle stopped in R position: 0 rpm
    NT Sensor Voltage
    		Input speed sensor output voltage/
    min.: 0 V
    max.: 5 V
    		Engine idling:
    Constantly changes between 0.8 to 1.6 V and 2.4 to 3.2 V
    		-
    Result 
    Result
    		Proceed to
    Data display is not within Normal Condition range
    		A
    Data display is within Normal Condition range
    		B



B
Go to step 4
A


2.INSPECT TRANSMISSION REVOLUTION SENSOR (NT)

  1. Remove the transmission revolution sensor (NT) (Click here) and then connect the battery.



  1. Wave a magnetic object left and right in front of the transmission revolution sensor tip (5 mm gap or closer) to change the high/low signals while measuring the current.


    C154686E01

NOTICE:
Make sure to wave the magnetic object during the inspection. Current will not change without waving the magnetic object as indicated by the arrow in the illustration.

  1. Measure the current according to the value(s) in the table below.

    Standard Current:

    Tester Connection
    		Condition
    		Specified Condition
    1 (NTO) - 2 (NTB)
    		Low signal
    		4 to 8 mA
    High signal
    		12 to 16 mA



NG
REPLACE TRANSMISSION REVOLUTION SENSOR (NT) (Click here)
OK


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


    C193936E01

  1. Disconnect the ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B16-1 (NTO) - B8-124 (NTO)
    		Always
    		Below 1 Ω
    B16-2 (NTB) - B8-123 (NTB)
    		Always
    		Below 1 Ω
    B8-123 (NTB) - Body ground
    		Always
    		10 kΩ or higher
    B8-124 (NTO) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector:
    (to Transmission Revolution Sensor (NT))
    *2
    		Front view of wire harness connector:
    (to ECM)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.REPLACE ECM

  1. Replace the ECM (Click here).


NEXT


5.PERFORM INITIALIZATION

NOTICE:
  1. Performing reset memory/initialization will clear the learned values of both the yaw rate and acceleration sensor (deceleration sensor 0 point calibration) and the CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate and acceleration sensor 0 point calibration, and CVT oil pressure calibration when replacing any of the parts shown in the following table:
    Replaced Part
    1. Continuously variable transaxle assembly
    2. ECM
    3. Oil pressure sensor
    4. Yaw rate and acceleration sensor
  2. After reset memory, always perform yaw rate and acceleration sensor (deceleration sensor 0 point) calibration first, and then the CVT oil pressure calibration.
  3. Always perform the 0 point calibration with the vehicle on level ground.
  4. Do not shake or vibrate the vehicle during the 0 point calibration.

  1. Using the intelligent tester, perform the reset memory, deceleration sensor 0 point calibration and CVT oil pressure calibration (Click here).

  1. Check for DTCs again (Click here).


NEXT

END