Drivetrain. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
A750F Automatic Transmission Transaxle. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
INSPECT SPEED SENSOR NT INSTALLATION
CHECK HARNESS AND CONNECTOR (SPEED SENSOR NT - ECM)
DTC P0717 Turbine Speed Sensor Circuit No Signal |
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 counter gear speed sensor signal SP2, the ECM 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.| DTC Code | DTC Detection Condition | Trouble Area |
| P0717 | All conditions are met for 5 sec. or more (1-trip detection logic): (a) Gear change: not performed. (b) Gear position: 4th or 5th. (c) T/M input shaft speed: 300 rpm or less. (d) T/M output shaft speed: 1000 rpm or more. (e) Park/neutral position switch: NSW, R and L input signal are OFF. (f) Shift solenoid valves and park/neutral position switch: in normal operation. |
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Check the waveform of the ECM connector.
- Standard:
Terminal No. (Symbol) Tool Setting Condition Specified Condition C130-35 (NT+) - C130-27 (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 speed sensor NT (turbine (input) speed sensor) or is output only a little. The NT terminal of the ECM detects the pulse signal from the speed sensor NT (input RPM). The ECM outputs a gear shift signal by comparing the input speed sensor NT signal with the output speed sensor SP2 signal.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 ECM detects the trouble, illuminates the MIL and stores the DTC.
- HINT:
- *1: A pulse is not output or is irregularly output.
- *2: The vehicle speed is approximately 50 km/h (30 mph) or more.
WIRING DIAGRAM
INSPECTION PROCEDURE
| DATA LIST |
- HINT:
- Using the intelligent tester 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.
Warm up the engine.
Turn the ignition switch off.
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the intelligent tester on.
Enter the following menus: Powertrain / Engine and ECT / Data List.
According to the display on the tester, read the Data List.
Engine and ECT Tester Display Measurement Item/Range Normal Condition Diagnostic Note SPD (NT) Input shaft speed/
Min.: 0 rpm
Max.: 12750 rpm- Lock-up ON (after warming up engine): Input turbine speed (NT) is equal to engine speed
- Lock-up OFF (idling with shift lever in N): Input turbine speed (NT) is nearly equal to engine speed
Data is displayed in increments of 50 rpm. - HINT:
- 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 (30 mph) or more:
Sensor trouble, improper installation or intermittent connection trouble in the circuit.
- Lock-up ON (after warming up engine): Input turbine speed (NT) is equal to engine speed
| 1.INSPECT SPEED SENSOR NT INSTALLATION |
Check the speed sensor NT installation.
- OK:
- The installation bolt is tightened properly and there is no clearance between the sensor and transmission case.
Text in Illustration *a CORRECT *b INCORRECT
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| OK | |
| 2.INSPECT SPEED SENSOR NT |
Disconnect the speed sensor connector.
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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
Text in Illustration *a Component without harness connected
(Speed Sensor NT)
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| OK | |
| 3.CHECK HARNESS AND CONNECTOR (SPEED SENSOR NT - ECM) |
Disconnect the ECM connector.
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Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition C130-35 (NT+) - C130-27 (NT-) 20°C (68°F) 560 to 680 Ω C130-35 (NT+) - Body ground Always 10 kΩ or higher C130-27 (NT-) - Body ground Always 10 kΩ or higher
Text in Illustration *a Rear view of wire harness connector
(to ECM)
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| OK | ||
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