Dtc P0717/67 Input Speed Sensor Circuit No Signal


DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK SPEED SENSOR (INSTALLATION)

INSPECT SPEED SENSOR (NCO)

CHECK WIRE HARNESS (SPEED SENSOR (NCO) - TCM)

DTC P0717/67 Input Speed Sensor Circuit No Signal


DESCRIPTION

The speed sensor (NCO) detects the rotation speed of the O/D input shaft from the rotation speed of the O/D direct clutch drum. Its construction is the same as that of the speed sensor (SP2).
By comparing the speed sensor (NCO) signal with the speed sensor (SP2) signal, the TCM detects the shift timing of the gears and controls the engine torque and hydraulic pressure according to various conditions. As a result, the gears shift smoothly.

DTC Code
DTC Detection Condition
Trouble Area
P0717/67
  1. All conditions below are detected for 5 sec. or more
    (2 trip detection logic):
    1. Gear changes not being performed
    2. Gear position: 1st, 2nd or 3rd
    3. Transmission input shaft rpm: less than 300 rpm
    4. Transmission output shaft rpm: 500 rpm or more
    5. Park/neutral position switch: OFF
    6. Shift solenoid valve S1, S2, and SL, and vehicle speed sensor (SPD1) are operating normally
  1. Open or short in speed sensor (NCO) circuit
  2. Speed sensor (NCO)
  3. TCM

MONITOR DESCRIPTION

The speed sensor (NCO) detects the transmission input shaft speed. The TCM determines the gear shift timing based on a comparison of the speed sensor (NCO) (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 the vehicle is running with the shift lever on D, the TCM will conclude that there is a malfunction in the speed sensor (NCO). The TCM will illuminate the MIL and set the DTC.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340E Automatic Transmission.Automatic Transmission System. Dtc P0717/67 Input Speed Sensor Circuit No Signal


INSPECTION PROCEDURE

1.CHECK SPEED SENSOR (INSTALLATION)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340E Automatic Transmission.Automatic Transmission System. Dtc P0717/67 Input Speed Sensor Circuit No Signal

  1. Check the speed sensor installation.

    OK:
    Installation bolt is tightened properly and there is no clearance between sensor and transmission case.


NG
SECURELY INSTALL SPEED SENSOR OR REPLACE SPEED SENSOR
OK


2.INSPECT SPEED SENSOR (NCO)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340E Automatic Transmission.Automatic Transmission System. Dtc P0717/67 Input Speed Sensor Circuit No Signal

  1. Disconnect the T7 sensor connector from the transmission.



  1. Measure the resistance of the sensor.

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

    HINT:
    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340E Automatic Transmission.Automatic Transmission System. Dtc P0717/67 Input Speed Sensor Circuit No Signal
    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340E Automatic Transmission.Automatic Transmission System. Dtc P0717/67 Input Speed Sensor Circuit No Signal
    Reference: Inspect using an oscilloscope.
    Check the waveform of the TCM connector.
    OK:
    Refer to illustration
    Item
    		Content
    Tester Connection
    		T19-3 (NCO+) - T19-2 (NCO-)
    Tool Setting
    		5 V/DIV, 0.5 msec./DIV.
    Condition
    		Engine is idling


NG
REPLACE SPEED SENSOR (NCO)
OK


3.CHECK WIRE HARNESS (SPEED SENSOR (NCO) - TCM)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.A340E Automatic Transmission.Automatic Transmission System. Dtc P0717/67 Input Speed Sensor Circuit No Signal

  1. Disconnect the T19 TCM connector.

  1. Measure the resistance of the wire harness side connector.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    T19-3 (NCO+) - T19-2 (NCO-)
    		20°C (68°F)
    		560 to 680 Ω
    T19-3 (NCO+) - Body ground
    		Always
    		10 kΩ or higher
    T19-2 (NCO-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TCM