P0717

U241E AUTOMATIC TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: P0717: Input Speed Sensor Circuit No Signal

DTC P0717 - Input Speed Sensor Circuit No Signal

DESCRIPTION

This sensor detects the rotation speed of the turbine, which shows the input revolution speed of the transaxle. By comparing the input speed signal (NT) with the counter gear speed sensor signal (NC), 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.






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 revolving 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 (NC).
While the vehicle is operating in 2nd, 3rd, or 4th gear with the shift lever in D, if the input shaft revolution speed is less than 300 rpm*1 and the output shaft revolution speed 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

1. DATA LIST
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.
NOTICE: 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.

(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Engine and ECT / Data List.
(g) Follow the instructions on the Techstream and read the Data List.





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 NT (INSTALLATION)




(a) Check the speed sensor NT installation.
OK:
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 B31 speed sensor NT connector.
(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) Disconnect the B33 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






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