AC60E AUTOMATIC TRANSMISSION / TRANSAXLE AUTOMATIC TRANSMISSION SYSTEM(for 7GR-FKS) P071512 Input/Turbine Speed Sensor "A" Circuit Short to Battery P071514 Input/Turbine Speed Sensor "A" Circuit Short to Ground or Open P071531 Input/Turbine Speed Sensor "A" No Signal
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. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P071512 | Input/Turbine Speed Sensor "A" Circuit Short to Battery | When the transmission revolution sensor (NT) input voltage is higher than 1.9 V for 4.5 seconds or more (1 trip detection logic). | ·
Harness or connector ·
Transmission revolution sensor (NT) ·
ECM |
Comes on | DTC stored | SAE Code:
P07C0 |
| P071514 | Input/Turbine Speed Sensor "A" Circuit Short to Ground or Open | When the transmission revolution sensor (NT) input voltage is below 0.1 V for 4.5 seconds or more (1 trip detection logic). | ·
Harness or connector ·
Transmission revolution sensor (NT) ·
ECM |
Comes on | DTC stored | SAE Code:
P07BF |
| P071531 | Input/Turbine Speed Sensor "A" No Signal | All conditions are met for 5 seconds or more (1 trip detection logic):
·
Park/neutral position switch D input signal is ON. ·
Gear position is 2nd, 3rd, 4th, 5th or 6th. ·
Transmission output shaft speed is 1000 rpm or more. ·
The vehicle speed is 25 km/h (15.5 mph) or more. ·
Transmission revolution sensor (NT) value is less than 300 rpm. |
·
Harness or connector ·
Transmission revolution sensor (NT) ·
ECM |
Comes on | DTC stored | SAE Code:
P0717 |
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 50 km/h (31 mph) or more.
CONFIRMATION DRIVING PATTERN
- CAUTION:
-
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
- HINT:
-
After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the GTS on.
Start the engine.
Perform the D Position Shift Test in Road Test and drive the vehicle for 5 seconds or more at 50 km/h (31 mph) or more.
Stop the vehicle.
Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
Input the DTC: P071512, P071514 or P071531.
Check the DTC judgment result.
| GTS Display | Description |
|---|---|
| NORMAL | ·
DTC judgment completed ·
System normal |
| ABNORMAL | ·
DTC judgment completed ·
System abnormal |
| INCOMPLETE | ·
DTC judgment not completed ·
Perform driving pattern after confirming DTC enabling conditions |
| N/A | ·
Unable to perform DTC judgment ·
Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit |
- HINT:
- ·
If the judgment result shows NORMAL, the system is normal.
·If the judgment result shows ABNORMAL, the system has a malfunction.
·If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
-
Perform registration and/or initialization when parts related to the automatic transmission are replaced.
DATA LIST
- HINT:
-
Using the GTS 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 GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Transmission / Data List / NT Sensor Speed.
Read the Data List according to the display on the GTS.
- Powertrain > Transmission > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note NT Sensor Speed Input turbine speed Min.: 0 rpm
Max.: 12750 rpm·Lock-up on (after warming up the engine): Value from transmission revolution sensor (NT) equal to engine speed
·Lock-up off (idling with shift lever in N): Value from transmission revolution sensor (NT) nearly equal to engine speed
Data is displayed in increments of 50 rpm.
- Powertrain > Transmission > Data List
-
Tester Display NT Sensor Speed - 50003 373 174
- HINT:
- ·
NT Sensor Speed is always 0 while driving: Open or short in the sensor or circuit.
·NT Sensor Speed is always more than 0 and less than 300 rpm while driving the vehicle at 50 km/h (31 mph) or more: Sensor malfunction, improper installation or intermittent connection malfunction in the circuit.
PROCEDURE
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Transmission / Data List / NT Sensor Speed, NT Sensor Voltage.
Read the Data List according to the display on the GTS.
- Powertrain > Transmission > Data List
-
Tester Display Measurement Item Range Normal Condition Diagnostic Note NT Sensor Speed Input turbine speed Min.: 0 rpm
Max.: 12750 rpm·Lock-up on (after warming up the engine): Value from transmission revolution sensor (NT) equal to engine speed
·Lock-up off (idling with shift lever in N): Value from transmission revolution sensor (NT) nearly equal to engine speed
Data is displayed in increments of 50 rpm. NT Sensor Voltage Transmission revolution sensor (NT) output voltage Min.: 0.000 V
Max.: 4.999 V0.1 to 1.9 V: Engine idling -
- Powertrain > Transmission > Data List
-
Tester Display NT Sensor Speed NT Sensor Voltage - 50003 373 174,175
- Result:
Result Proceed to Data display is not within Normal Condition range A Data display is within Normal Condition range B
A
B
Remove the transmission revolution sensor (NT).
Connect the battery to the sensor as shown in the illustration.
| *1 | Transmission Revolution Sensor (NT) | *2 | Ammeter |
| *3 | Battery | *4 | Magnet |
| *a | 5 mm (0.197 in.) or less | - | - |
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.
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
- Result:
Proceed to OK NG
OK
NG
Disconnect the transmission revolution sensor (NT) connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition E38-2 (NTB) - E4-32 (NTB) Always Below 1 Ω E38-1 (NTO) - E4-31 (NTO) Always Below 1 Ω E38-2 (NTB) - Body ground Always 10 kΩ or higher E38-1 (NTO) - Body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG