P0717

U341E AUTOMATIC TRANSAXLE: AUTOMATIC TRANSAXLE 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 input turbine. By comparing the input turbine speed signal (NT) with the output shaft speed, the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions, thus providing smooth gear shift.






MONITOR DESCRIPTION

The input speed sensor detects the transmission input shaft speed. The ECM determines the gear shift timing based on a comparison of the input 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 input turbine speed sensor (NT). The ECM will illuminate the MIL and store the DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT SPEED SENSOR INSTALLATION




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




(a) Disconnect the speed sensor NT connector from the transaxle.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






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




(a) Connect the speed sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):






Standard resistance (Check for short):






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