Toyota Tacoma (2015-2018) Service Manual: Input Speed Sensor Circuit No Signal (P0717,P07BF,P07C0)
DESCRIPTION
This sensor detects the rotation speed of the turbine which shows the input turbine speed of the transmission. By comparing the input turbine speed signal (NT) with the output shaft 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 No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
P0717 |
All conditions are met for 5 seconds or more (1 trip detection logic): (a) Park/neutral position switch D input signal is ON. (b) Gear position is 2nd, 3rd, 4th, 5th or 6th. (c) Transmission output shaft speed is 1000 rpm or more. (d) The vehicle speed is 25.00534 km/h (15.5376009944065 mph) or more. (e) Transmission revolution sensor (NT) value is less than 300 rpm. |
|
|
P07BF |
When the transmission revolution sensor (NT) input voltage is below 0.2 V for 4.5 seconds or more (1 trip detection logic). |
|
|
P07C0 |
When the transmission revolution sensor (NT) input voltage is higher than 1.8 V for 4.5 seconds or more (1 trip detection logic). |
|
MONITOR DESCRIPTION
The transmission revolution sensor (NT) detects the transmission input shaft speed. The ECM calculates gear shifts comparing the transmission revolution sensor (NT) with the transmission revolution sensor (SP2).
While the vehicle is operating in 2nd, 3rd, 4th, 5th or 6th gear with the shift lever in D, if the input shaft speed is less than 300 rpm*1 and the output shaft speed is more than 1000 rpm*2, the ECM 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 25.00534 km/h (15.5376009944065 mph) or more.
MONITOR STRATEGY
|
Related DTCs |
P0717: Transmission revolution sensor (NT)/Verify pulse input P07BF: Transmission revolution sensor (NT)/Range check (Low voltage) P07C0: Transmission revolution sensor (NT)/Range check (High voltage) |
|
Required sensors/Components |
Transmission revolution sensor (NT), Transmission revolution sensor (SP2) |
|
Frequency of operation |
Continuous |
|
Duration |
P0717: 5 sec. P07BF and P07C0: 4.5 sec. |
|
MIL operation |
Immediately |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
All:|
Battery voltage |
8 V or higher |
|
Ignition switch |
ON |
|
Starter |
OFF |
|
The monitor will run whenever the following DTCs are not stored |
P0746, P0748 (Shift solenoid valve SL1 circuit) P0776, P0778 (Shift solenoid valve SL2 circuit) P0796, P0798 (Shift solenoid valve SL3 circuit) P2808, P2810 (Shift solenoid valve SL4 circuit) |
|
Park/neutral position switch (NSW) |
OFF |
|
Shift change |
Shift change is completed before starting next shift change operation |
|
ECM selected gear |
Not 1st |
|
Output shaft revolution |
1000 rpm or more |
|
R position switch |
OFF |
|
Engine |
Running |
|
Vehicle speed |
25.00534 km/h (15.5376009944065 mph) or more |
|
Transmission range switch circuit fail (P0705) (Pending + MIL) |
Not detected |
|
Turbine speed sensor range check fail (P07BF, P07C0) (Pending / MIL) |
Not detected |
|
Turbine speed sensor pulse input fail (P0717) (Pending / MIL) |
Not detected |
TYPICAL MALFUNCTION THRESHOLDS
P0717:|
Turbine speed sensor revolution |
Less than 300 rpm |
|
Turbine speed sensor voltage |
Below 0.2 V |
|
Turbine speed sensor voltage |
Higher than 1.8 V |
COMPONENT OPERATING RANGE
|
Transmission revolution 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
.gif)
). - Perform registration and/or initialization when parts related to the
automatic transmission are replaced (See page
).
HINT:
After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
- Perform the D Position Shift Test in Road Test and drive the vehicle
for 5 seconds or more at 25 km/h (15.54 mph) or more (See page
).
- Check for DTCs again (See page ).
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) According to the display on the Techstream, 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 |
|
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 25 km/h (15.54 mph) or more: Sensor trouble, improper installation, or intermittent connection trouble of the circuit.
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (SPD (NT) AND NT SENSOR VOLTAGE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Data List
(e) In accordance with the display on the Techstream, 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 |
|
Data is displayed in increments of 50 rpm |
|
NT Sensor Voltage |
Transmission revolution sensor (NT) output voltage/ Min.: 0.000 V Max.: 4.999 V |
0.1 to 1.9 V: Engine idling |
- |
|
Result |
Proceed to |
|---|---|
|
Data display is not within Normal Condition range |
A |
|
Data display is within Normal Condition range |
B |
| B | .gif) |
REPLACE ECM |
|
.gif)
|
2. |
INSPECT TRANSMISSION REVOLUTION SENSOR (NT) |
(a) Remove the transmission revolution sensor (NT) (See page
).
(b) Connect the battery to the sensor as shown in the illustration.
Text in Illustration
|
*1 |
Transmission Revolution Sensor (NT) |
*2 |
Ammeter |
|
*3 |
Battery |
*4 |
Magnet |
|
*a |
5 mm (0.197 in.) or less |
- |
- |
(c) Wave a magnetic object left and right in front of the transmission revolution sensor (NT) tip (5 mm (0.197 in.) or less) to change the high/low signals while measuring the current.
NOTICE:
Make sure to wave the magnetic object during the inspection. The current will not change without waving the magnetic object as indicated by the arrow in the illustration.
(d) Measure the current according to the value(s) in the table below.
Standard Current:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1 (NTO) - 2 (NTB) |
Low signal |
4 to 8 mA |
|
1 (NTO) - 2 (NTB) |
High signal |
12 to 16 mA |
| NG | |
REPLACE TRANSMISSION REVOLUTION SENSOR (NT) |
|
|
3. |
CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NT) - ECM) |
(a) Disconnect the T6 transmission revolution sensor (NT) connector.
(b) Disconnect the E19 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T6-2 (NTB) - E19-29 (NTB) |
Always |
Below 1 Ω |
|
T6-1 (NTO) - E19-19 (NTO) |
Always |
Below 1 Ω |
|
T6-2 (NTB) - Body ground |
Always |
10 kΩ or higher |
|
T6-1 (NTO) - Body ground |
Always |
10 kΩ or higher |
| OK | |
REPLACE ECM |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Pressure Control Solenoid "B" Performance (Shift Solenoid Valve SL2) (P0776)
SYSTEM DESCRIPTION
The ECM uses the vehicle speed signal and signals from the transmission revolution
sensors (NT, SP2) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear).
The ECM com ...
Output Speed Sensor Circuit No Signal (P0722,P077C,P077D)
DESCRIPTION
This sensor detects the rotation speed of the transmission output shaft and sends
signals to the ECM. By comparing the input turbine speed signal (NT) with the output
shaft speed sens ...
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ILLUSTRATION
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
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(a) Operate the washer nozzle sub-assembly and check the position that the washer
fluid hits the windshield.
Standard:
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USB Device Malfunction (B1585)
DESCRIPTION
This DTC is stored when a malfunction occurs in a connected device.
DTC No.
DTC Detection Condition
Trouble Area
B1585
USB Device Malfunction
Non mass-storage class or incompatible protocol USB device
...
Terminals Of Ecu
TERMINALS OF ECU
1. AIR CONDITIONING AMPLIFIER ASSEMBLY
HINT:
Check from the rear of the connector while it is connected to the air conditioning
amplifier assembly.
Terminal No.
(Symbol)
Wiring Color
Terminal Description
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