Lexus ES: Input/Turbine Speed Sensor "A" Circuit Short to Battery (P071512,P071514,P071531)

Lexus ES (XZ10) Service Manual / Drivetrain / Ua80e (automatic Transmission / Transaxle) / Automatic Transaxle System / Input/Turbine Speed Sensor "A" Circuit Short to Battery (P071512,P071514,P071531)

DESCRIPTION

The transmission revolution sensor (NT) detects the input shaft rotation speed and sends it to the ECM.

Based on the transmission revolution sensor (NT) signal and the transmission revolution sensor (NC) signals, the ECM controls engine torque and shift timing. Based on the input shaft rotation speed and the engine speed signal, lock-up control is performed.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P071512	Input/Turbine Speed Sensor "A" Circuit Short to Battery	All of the following conditions are met (1-trip detection logic): The battery voltage is 8 V or more. The engine switch is on (IG). The starter is off. Transmission revolution sensor (NT) input voltage is more than 1.9 V for 4.5 seconds.	Transmission revolution sensor (NT) Transmission wire Harness and connector ECM	Comes on	DTC stored	SAE Code: P07C0
P071514	Input/Turbine Speed Sensor "A" Circuit Short to Ground or Open	All of the following conditions are met (1-trip detection logic): The battery voltage is 8 V or more. The engine switch is on (IG). The starter is off. Transmission revolution sensor (NT) input voltage is less than 0.1 V for 4.5 seconds or more.	Transmission revolution sensor (NT) Transmission wire Harness and connector ECM	Comes on	DTC stored	SAE Code: P07BF
P071531	Input/Turbine Speed Sensor "A" No Signal	All of the following conditions are met (1-trip detection logic): The battery voltage is 8 V or more. The park/neutral position switch D input signal is ON. The speed indicated by transmission revolution sensor (NC) is 490 rpm or more. The vehicle speed is 25 km/h (16 mph) or more. The vehicle is being driven in 1st, 2nd, 3rd, 4th, 5th, 6th, 7th or 8th gear. The speed indicated by transmission revolution sensor (NT) is less than 300 rpm for 5 seconds or more.	Transmission revolution sensor (NT) Transmission wire Harness and connector ECM	Comes on	DTC stored	SAE Code: P0717

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P071512

Input/Turbine Speed Sensor "A" Circuit Short to Battery

All of the following conditions are met (1-trip detection logic):

The battery voltage is 8 V or more.
The engine switch is on (IG).
The starter is off.
Transmission revolution sensor (NT) input voltage is more than 1.9 V for 4.5 seconds.

Transmission revolution sensor (NT)
Transmission wire
Harness and connector
ECM

Comes on

DTC stored

SAE Code:

P07C0

P071514

Input/Turbine Speed Sensor "A" Circuit Short to Ground or Open

All of the following conditions are met (1-trip detection logic):

The battery voltage is 8 V or more.
The engine switch is on (IG).
The starter is off.
Transmission revolution sensor (NT) input voltage is less than 0.1 V for 4.5 seconds or more.

Transmission revolution sensor (NT)
Transmission wire
Harness and connector
ECM

Comes on

DTC stored

SAE Code:

P07BF

P071531

Input/Turbine Speed Sensor "A" No Signal

All of the following conditions are met (1-trip detection logic):

The battery voltage is 8 V or more.
The park/neutral position switch D input signal is ON.
The speed indicated by transmission revolution sensor (NC) is 490 rpm or more.
The vehicle speed is 25 km/h (16 mph) or more.
The vehicle is being driven in 1st, 2nd, 3rd, 4th, 5th, 6th, 7th or 8th gear.
The speed indicated by transmission revolution sensor (NT) is less than 300 rpm for 5 seconds or more.

Transmission revolution sensor (NT)
Transmission wire
Harness and connector
ECM

Comes on

DTC stored

SAE Code:

P0717

MONITOR DESCRIPTION

The NT terminal of the ECM detects a pulse signal from the transmission revolution sensor (NT) (input RPM). The ECM calculates gear shifts by comparing input signals of the transmission revolution sensor (NT) with the transmission revolution sensor (NC).

While the vehicle is being driven in 1st, 2nd, 3rd, 4th, 5th, 6th, 7th or 8th gear with the shift lever in D, if the input shaft revolution (speed) is less than 300 rpm* when the vehicle speed is 25 km/h (16 mph) or more, the ECM interprets this as a malfunction, illuminates the MIL and stores a DTC.

*: Pulse is not output or is irregularly output.

MONITOR STRATEGY

Related DTCs	P0717: Speed sensor (NT)/Verify pulse input P07BF: Speed sensor (NT)/Range check (Low voltage) P07C0: Speed sensor (NT)/Range check (High voltage)
Required sensors/components	Speed sensor (NT), Speed sensor (NC)
Frequency of operation	Continuous
Duration	P0717: 5 sec. P07BF, P07C0: 4.5 sec.
MIL operation	Immediate
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

All

Battery voltage	8 V or more
Engine switch	On (IG)
Starter	OFF

P0717

The monitor will run whenever the following DTCs are not stored	None
Turbine speed sensor range check fail (P07BF, P07C0) (Pending / MIL)	Not detected
Vehicle speed sensor	25 km/h (15.54 mph) or more
Intermediate shaft speed sensor revolution	490 rpm or more
Shift change is completed and before starting next shift change operation	-
Park/neutral position switch	OFF
R range position switch	OFF
D range position switch	ON
Engine	Running
Pressure control solenoid circuit fail (P08C1, P08C2, P0962, P0963, P0966, P0967, P0970, P0971, P2720, P2721, P2814, P2815, P281D, P281E) (Pending + MIL)	Not detected
Torque converter clutch pressure control solenoid circuit fail (P2763, P2764) (Pending + MIL)	Not detected
Torque converter clutch solenoid circuit fail (P2769, P2770) (Pending + MIL)	Not detected
Vehicle speed sensor monitor condition is met	-

P07BF, P07C0

The monitor will run whenever the following DTCs are not stored

None

Turbine speed sensor pulse input fail (P0717)

(Pending / MIL)

Not detected

Vehicle speed sensor monitor condition judgment:

Intermediate shaft speed sensor revolution	300 rpm or more
Shift change is completed and before starting next shift change operation	-
R range position switch	OFF
D range position switch	ON
Park/neutral position switch	OFF
Engine	Running
Pressure control solenoid circuit fail (P08C1, P08C2, P0962, P0963, P0966, P0967, P0970, P0971, P2720, P2721, P2814, P2815, P281D, P281E) (Pending + MIL)	Not detected
Torque converter clutch pressure control solenoid circuit fail (P2763, P2764) (Pending + MIL)	Not detected
Torque converter clutch solenoid circuit fail (P2769, P2770) (Pending + MIL)	Not detected

One of the following conditions is met: Condition (A), (B), (C), (D), (E), (F), (G) or (H)

Condition (A)

ECM selected gear

1st

Turbine speed sensor revolution

1450 rpm or more

Condition (B)

ECM selected gear

2nd

Turbine speed sensor revolution

840 rpm or more

Condition (C)

ECM selected gear

3rd

Turbine speed sensor revolution

540 rpm or more

Condition (D)

ECM selected gear

4th

Turbine speed sensor revolution

400 rpm or more

Condition (E)

ECM selected gear

5th

Turbine speed sensor revolution

330 rpm or more

Condition (F)

ECM selected gear

6th

Turbine speed sensor revolution

300 rpm or more

Condition (G)

ECM selected gear

7th

Turbine speed sensor revolution

300 rpm or more

Condition (H)

ECM selected gear

8th

Turbine speed sensor revolution

300 rpm or more

Either of the following conditions is met: Condition (I) or (J)

Condition (I)

ECT

20°C (68°F) or more

ECT sensor circuit fail (P0117, P0118)

(Pending + MIL)

Not detected

Time after park/neutral position switch ON to OFF

2 sec. or more

Condition (J)

Either of the following conditions is met	(a) or (b)
(a) ECT	Less than 20°C (68°F)
(b) ECT sensor circuit fail (P0117, P0118) (Pending + MIL)	Detected
Time after park/neutral position switch ON to OFF	30 sec. or more

TYPICAL MALFUNCTION THRESHOLDS

P0717

Turbine speed sensor revolution

Less than 300 rpm

P07BF

Turbine speed sensor voltage

Less than 0.1 V

P07C0

Turbine speed sensor voltage

More than 1.9 V

COMPONENT OPERATING RANGE

Turbine speed sensor revolution	300 rpm or more
Turbine speed sensor voltage	0.1 V or more and 1.9 V or less

CONFIRMATION DRIVING PATTERN

CAUTION:

When performing the D Position Shift Test inspection in Road Test, 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.
When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.
Click here

Connect the Techstream to the DLC3.
Turn the engine switch on (IG) and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for 2 minutes or more.
Turn the engine switch on (IG) and turn the Techstream on.
Start the engine.
Perform the D Position Shift Test inspection in Road Test. [*1]
Click here

HINT:

[*1] : Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
Stop the vehicle.
Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
Input the DTC: P071512, P071514 or P071531.

Check the DTC judgment result.

Techstream 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 normal judgment procedure again.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

Strictly observe posted speed, limits, traffic laws and road conditions.
Do not drive the vehicle with the cable of the Techstream contacting the pedals, shift lever or steering wheel.
Driving the vehicle with the cable of the Techstream contacting these areas could impede vehicle control, resulting in a serious accident.

Do not operate the Techstream while driving the vehicle.
Operating the Techstream while driving the vehicle will prevent you from paying sufficient attention to vehicle surroundings, and could result in a serious accident.

NOTICE:

Perform the universal trip to clear permanent DTCs.
Click here
Perform registration and/or initialization when parts related to the automatic transaxle are replaced.
Click here

DATA LIST

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.

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.

(a) Warm up the engine.

(b) Turn the engine switch off.

(d) Turn the engine switch on (IG).

(e) Turn the Techstream on.

(f) Enter the following menus: Powertrain / Transmission / Data List / NT Sensor Speed.

(g) Read the Data List according to the display on the Techstream.

Powertrain > Transmission > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
NT Sensor Speed	Input shaft speed	Min.: 0 rpm Max.: 12750 rpm	Equal to engine speed: Lock-up on (after warming up engine) Nearly equal to engine speed: Lock-up off (idling with shift lever in N)	Data is displayed in increments of 50 rpm

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

NT Sensor Speed

Input shaft speed

Min.: 0 rpm

Max.: 12750 rpm

Equal to engine speed: Lock-up on (after warming up engine)
Nearly equal to engine speed: Lock-up off (idling with shift lever in N)

Data is displayed in increments of 50 rpm

Powertrain > Transmission > Data List

Tester Display
NT Sensor Speed

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

1.	READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Enter the following menus: Powertrain / Transmission / Data List / NT Sensor Speed and NT Sensor Voltage.

(e) Read the Data List according to the display on the Techstream.

Powertrain > Transmission > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
NT Sensor Speed	Input shaft speed	Min.: 0 rpm Max.: 12750 rpm	Equal to engine speed: Lock-up on (after warming up engine) Nearly equal to engine speed: Lock-up off (idling with shift lever in N)	Data is displayed in increments of 50 rpm
NT Sensor Voltage	NT sensor voltage	Min.: 0.000 V Max.: 4.999 V	0.1 to 1.9 V: Engine idling	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

NT Sensor Speed

Input shaft speed

Min.: 0 rpm

Max.: 12750 rpm

Equal to engine speed: Lock-up on (after warming up engine)
Nearly equal to engine speed: Lock-up off (idling with shift lever in N)

Data is displayed in increments of 50 rpm

NT Sensor Voltage

NT sensor voltage

Min.: 0.000 V

Max.: 4.999 V

0.1 to 1.9 V: Engine idling

Powertrain > Transmission > Data List

Tester Display
NT Sensor Speed
NT Sensor Voltage

Result	Proceed to
Data List values are normal	A
Data List values are not normal	B

GO TO STEP 5

2.	INSPECT TRANSMISSION REVOLUTION SENSOR (NT)

(a) Disconnect the C30 transmission wire connector.

*a	Front view of wire harness connector (to Transmission Wire)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
C30-11 (NTO) - Body ground	Always	99 to 101 Ω

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
C30-12 (NTB) - Body ground	Engine switch on (IG)	11 to 14 V

GO TO STEP 4

3.	INSPECT TRANSMISSION WIRE (TRANSMISSION REVOLUTION SENSOR (NT))

(a) Disconnect the transmission revolution sensor (NT) connector.

Click here

*1	Transmission Wire
*a	Transmission Revolution Sensor (NT) Side
*b	Wire Harness Connector Side

(b) Disconnect the C30 transmission wire connector.

Standard Resistance

Tester Connection	Condition	Specified Condition
1 (transmission revolution sensor (NT) side) - 12 (NTB) (wire harness connector side)	Always	Below 1 Ω
2 (transmission revolution sensor (NT) side) - 11 (NTO) (wire harness connector side)	Always	Below 1 Ω
1 (transmission revolution sensor (NT) side) or 12 (NTB) (wire harness connector side) - Body ground and other terminals	Always	10 kΩ or higher
2 (transmission revolution sensor (NT) side) or 11 (NTO) (wire harness connector side) - Body ground and other terminals	Always	10 kΩ or higher

REPLACE TRANSMISSION REVOLUTION SENSOR (NT)

REPAIR OR REPLACE TRANSMISSION WIRE

4.	CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

(a) Disconnect the C30 transmission wire connector.

(b) Disconnect the C32 ECM connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
C30-12 (NTB) - C32-75 (NTB)	Always	Below 1 Ω
C30-11 (NTO) - C32-74 (NTO)	Always	Below 1 Ω
C30-12 (NTB) or C32-75 (NTB) - Body ground and other terminals	Always	10 kΩ or higher
C30-11 (NTO) or C32-74 (NTO) - Body ground and other terminals	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)

5.	REPLACE ECM

(a) Replace the ECM.

Click here

PERFORM REGISTRATION

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ECM selected gear	1st
Turbine speed sensor revolution	1450 rpm or more

ECM selected gear	2nd
Turbine speed sensor revolution	840 rpm or more

ECM selected gear	3rd
Turbine speed sensor revolution	540 rpm or more

ECM selected gear	4th
Turbine speed sensor revolution	400 rpm or more

ECM selected gear	5th
Turbine speed sensor revolution	330 rpm or more