Input / Turbine Speed Sensor Circuit Malfunction (P0715,P0717)

DESCRIPTION

This sensor detects the rotation speed of the turbine which shows the input revolution (speed) of the transaxle. By comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (NC), the TCM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions, thus, providing smooth gear shifts.

Text in Illustration

*1	Counter Gear	*2	Clutch Drum
*3	Output Speed Sensor NC	*4	Input Speed Sensor NT

DTC No.	DTC Detection Condition	Trouble Area
P0715	When the speed sensor input voltage is either more than 1.9 V or less than 0.1 V for 4.5 seconds or more.(1-trip detection logic)	Transmission revolution sensor (speed sensor NT) Transmission wire TCM
P0717	ECM detects conditions (a), (b) and (c) continuously for 5 sec. or more: (1-trip detection logic) (a) Vehicle speed: 50 km/h or more (b) Park/neutral position switch (R) is OFF (c) Speed sensor (NT): less than 300 rpm

MONITOR DESCRIPTION

The NT terminal of the TCM detects a revolution signal from the speed sensor (NT) (input RPM). The TCM calculates gear shifts comparing the speed sensor (NT) with the speed sensor (NC).

While the vehicle is operating in 2nd, 3rd, 4th or 5th gear with the shift lever in D, if the input shaft revolution (speed) is less than 300 rpm*1 although the output shaft revolution (speed) is more than 1000 rpm*2, the TCM interprets this as a fault, illuminates the MIL and stores the DTC.

*1: Pulse is not output or is irregularly output.

*2: The vehicle speed is 50 km/h or more.

MONITOR STRATEGY

Related DTCs	P0715: Speed sensor (NT)/Range check P0717: Speed sensor (NT)/Verify pulse input
Required sensors/Components	Speed sensor (NT), Speed sensor (NC)
Frequency of operation	Continuous
Duration	P0715: 4.5 sec. P0717: 5 sec.
MIL operation	Immediate
Sequence of operation	None

TYPICAL ENABLING CONDITIONS P0715:

Battery voltage	8 V or more
Ignition switch	ON
Starter	OFF

P0717:

The monitor will run whenever this DTC is not present.	P0500 (VSS) P0748, P0778, P0798 (Shift solenoid valve (range))
Shift change	Shift change is completed before starting next shift change operation
TCM selected gear	2nd, 3rd, 4th, 5th or 6th
Output shaft revolution	1,000 rpm or more
R switch	OFF
NSW switch	OFF
Engine	Running
Battery voltage	8 V or more
Ignition switch	ON
Starter	OFF
Transmission range switch circuit	Not malfunction
Turbine speed sensor range check	Not malfunction

TYPICAL MALFUNCTION THRESHOLDS P0715:

Sensor voltage

Less than 0.1 V or more than 1.9 V

P0717:

Turbine speed sensor revolution

Less than 300 rpm

COMPONENT OPERATING RANGE

Speed sensor (NT)

Turbine speed is equal to engine speed with lock-up ON

WIRING DIAGRAM
CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs (See page ).

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.

1. 1
   Warm up the engine.
2. 2
   Turn the ignition switch off.
3. 3
   Connect the Techstream to the DLC3.
4. 4
   Turn the ignition switch to ON.
5. 5
   Turn the Techstream on.
6. 6
   Enter the following menus: Powertrain / ECT / Data List.
7. 7
   According to the display on the Techstream, read the Data List. TCM

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   SPD (NT)	Input shaft speed/ Min.: 0 rpm Max.: 12750 rpm	Lock-up is ON (after warming up engine): Input turbine speed (NT) is equal to engine speed 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 or more: Sensor trouble, improper installation, or intermittent connection trouble of the circuit.

PROCEDURE

1. INSPECT SPEED SENSOR (SENSOR INSTALLATION)

(a) Remove the valve body assembly.

(b) Make sure that the connector is properly connected, and check the speed sensor installation. OK: The installation bolt is tightened properly and there is no clearance between the sensor and transaxle case.

NG

REPAIR OR REPLACE SPEED SENSOR

OK

1. INSPECT TRANSMISSION WIRE

(a) Remove the TCM.

(b) Disconnect the speed sensor connector from the transmission wire.

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

Standard Resistance:

Tester Condition	Condition	Specified Condition
1 (NTB) sensor side - 1 (NTB) TCM side	Always	Below 1 Ω
2 (NTO) sensor side - 2 (NTO) TCM side	Always	Below 1 Ω
1 (NTB) sensor side - Body ground	Always	10 kΩ or higher
2 (NTO) sensor side - Body ground	Always	10 kΩ or higher
1 (NTB) sensor side - All other terminals except 2 (NTO) sensor side	Always	10 kΩ or higher
2 (NTO) sensor side - All other terminals except 1 (NTB) sensor side	Always	10 kΩ or higher

Text in Illustration

*1	Component without harness connected) (Transmission Wire)
*2	TCM Side
*3	Sensor Side

NG

REPLACE TRANSMISSION WIRE

OK

1. REPLACE SPEED SENSOR

(a) (See page ).

NEXT

1. CHECK IF DTC OUTPUT RECURS (SEE IF DTC P0715 AND/OR P0717 OUTPUT AGAIN)

(a) Connect the Techstream to the DLC3.

(b) Start the engine and turn the Techstream on.

(c) Enter the following menus: Powertrain / ECT / DTC / Clear.

HINT:

Write down the currently output DTCs before clearing them.

(d) Perform the monitor drive pattern (See page ).

(e) Enter the following menus: Powertrain / ECT / DTC.

(f) Read the DTCs using the Techstream.

Display (DTC Output)	Proceed to
Only "P0715 or P0717" is output	A
No output	B

A

REPLACE TCM

B

END