Toyota Corolla Cross: Input/Turbine Speed Sensor "A" Circuit Short to Battery (P071512,P071514,P071531)

DESCRIPTION

The TCM uses signals from the transmission revolution sensor (NT) installed to the continuously variable transaxle to control the lock-up engagement pressure.

The transmission revolution sensor (NT) detects the input turbine speed and sends it to the TCM.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P071512	Input/Turbine Speed Sensor "A" Circuit Short to Battery	The transmission revolution sensor (NT) signal is normal but the transmission revolution sensor (NT) output voltage is higher than 1.8 V for 2 seconds or more (1-trip detection logic).	Wire harness or connector Transmission revolution sensor (NT) TCM	Comes on	DTC stored	SAE Code: P07C0
P071514	Input/Turbine Speed Sensor "A" Circuit Short to Ground or Open	The transmission revolution sensor (NT) signal is normal but the transmission revolution sensor (NT) output voltage is less than 0.2 V for 2 seconds or more (1-trip detection logic).	Wire harness or connector Transmission revolution sensor (NT) TCM	Comes on	DTC stored	SAE Code: P07BF
P071531	Input/Turbine Speed Sensor "A" No Signal	When transmission revolution sensor (NSS) and (NOUT) signals both indicate 780 rpm or more, the transmission revolution sensor (NT) signal indicates less than 300 rpm for 5 seconds or more (1-trip detection logic).	Wire harness or connector Transmission revolution sensor (NT) TCM	Comes on	DTC stored	SAE Code: P0717

MONITOR DESCRIPTION

The transmission revolution sensor (NT) is used to detect the input turbine speed. The TCM determines the necessary gear ratio based on a comparison of the transmission revolution sensor (NT) (input turbine speed) and transmission revolution sensor (NOUT) (output shaft speed) signals.

When the output shaft speed is higher than the expected value and the input turbine speed is less than 300 rpm while driving with the shift lever in D, the TCM will determine that the transmission revolution sensor (NT) is malfunctioning, illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs	P0717: Turbine speed sensor (Transmission revolution sensor (NT))/Verify pulse input P07BF: Turbine speed sensor (Transmission revolution sensor (NT))/Range check (Low voltage) P07C0: Turbine speed sensor (Transmission revolution sensor (NT))/Range check (High voltage)
Required sensors/Components	Transmission revolution sensor (NT) Transmission revolution sensor (NSS) Transmission revolution sensor (NOUT)
Frequency of operation	Continuous
Duration	P0717: 5 sec. P07BF, P07C0: 2 sec.
MIL operation	Immediate
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

All

Auxiliary battery voltage	8 V or more
Ignition switch	ON
Starter	OFF

P0717

Turbine speed sensor range check fail (P07BF, P07C0) (Pending / MIL)	Not detected
D range position switch	ON
R range position switch	OFF
Park position switch	OFF
Neutral position switch	OFF
Engine	Running
Pressure control solenoid circuit fail (P08CA, P08CB, P0962, P0963, P0966, P0967, P2826, P2827, P282F, P2830) (Pending + MIL)	Not detected
Torque converter clutch pressure control solenoid circuit fail (P2763, P2764) (Pending + MIL)	Not detected
Intermediate shaft speed sensor for belt drive revolution	780 rpm or more
Output speed sensor revolution	780 rpm or more

Vehicle speed sensor monitor condition judgment:

D range position switch	ON
R range position switch	OFF
Park position switch	OFF
Neutral position switch	OFF
Pressure control solenoid circuit fail (P08CA, P08CB, P0962, P0963, P0966, P0967, P2826, P2827, P282F, P2830) (Pending + MIL)	Not detected
Torque converter clutch pressure control solenoid circuit fail (P2763, P2764) (Pending + MIL)	Not detected
Output speed sensor revolution	380 rpm or more
Intermediate shaft speed sensor for belt drive revolution	380 rpm or more
One of the following conditions is met	-
- Speed sensor monitor driving mode	Belt mode (Synchronizer engaged)
- Speed sensor monitor driving mode	Belt mode (Synchronizer released)

One of the following conditions is met: Condition (A) or (B)

• Condition (A)

  ECT	20°C (68°F) or more
  ECT sensor circuit fail (P0117, P0118) (Pending + MIL)	Not detected
  All of the following conditions are met	2 sec. or more
  - Park position switch	OFF
  - Neutral position switch	OFF

  Condition (B)

  One of the following conditions is met	-
  - ECT	Less than 20°C (68°F)
  - ECT sensor circuit fail (P0117, P0118) (Pending + MIL)	Detected
  All of the following conditions are met	30 sec. or more
  - Park position switch	OFF
  - Neutral position switch	OFF

P07BF, P07C0

Turbine speed sensor pulse input fail (P0717) (Pending / MIL)

Not detected

TYPICAL MALFUNCTION THRESHOLDS

P0717

Turbine speed sensor revolution

Less than 300 rpm

P07BF

Turbine speed sensor voltage

Less than 0.2 V

P07C0

Turbine speed sensor voltage

More than 1.8 V

COMPONENT OPERATING RANGE

P0717

Turbine speed sensor revolution

300 rpm or more

P07BF, P07C0

Turbine speed sensor voltage

0.2 V or more and 1.8 V or less

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.
• When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.

  Click here

1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
2. Turn the ignition switch off and wait for 2 minutes or more.
3. Turn the ignition switch to ON and turn the GTS on.
4. Start the engine.
5. 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.

6. Stop the vehicle.
7. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
8. Input the DTC: P071512, P071514 or P071531.
9. 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 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 GTS contacting the pedals, shift lever or steering wheel.
• Driving the vehicle with the cable of the GTS contacting these areas could impede vehicle control, resulting in a serious accident.

• Do not operate the GTS while driving the vehicle.
• Operating the GTS 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.

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• Perform registration and/or initialization when parts related to the continuously variable transaxle system are replaced.

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• Check that no DTCs are stored after performing initialization.

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PROCEDURE

1.	READ VALUE USING GTS (NT SENSOR SPEED AND NT SENSOR VOLTAGE)

(a) Enter the following menus:

(b) According to the display on the GTS, read the Data List.

Powertrain > Transmission > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
NT Sensor Speed	Input turbine speed (NT)	Min.: 0 rpm Max.: 65535 rpm	Equal to engine speed (NE): Lock-up ON (After warming up engine) Nearly equal to engine speed (NE): Lock-up OFF (Engine idling with shift lever in P or N) 0 rpm: Vehicle stopped with shift lever in R	-
NT Sensor Voltage	Transmission revolution sensor (NT) output voltage	Min.: 0.000 V Max.: 4.999 V	0.2 to 1.8 V: Engine idling (Vehicle stopped with shift lever in P or N)	-

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

B

GO TO STEP 3

A

2.	REPLACE TCM

Click here

NEXT

PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here for Initialization: Click here

3.	INSPECT TRANSMISSION REVOLUTION SENSOR (NT)

(a) Remove the transmission revolution sensor (NT).

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(b) Connect the auxiliary battery to the transmission revolution sensor (NT) as shown in the illustration.

*1	Auxiliary battery	*2	Ammeter
*a	Component without harness connected (Transmission Revolution Sensor (NT))	*b	Magnet
*c	5 mm or less	-	-

(c) Wave a magnet left and right 5 mm (0.197 in.) or less from the tip of the transmission revolution sensor (NT) to output a high/low signal while measuring the current.

NOTICE:

Make sure to wave the magnet during the inspection. The current will not change unless the magnet is moved as shown 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 WIRE

OK

4.	CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NT) - TCM)

(a) Disconnect the C67 transmission revolution sensor (NT) connector.

(b) Disconnect the C80 TCM connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
C67-2 (NTB) - C80-25 (NTB)	Always	Below 1 Ω
C67-1 (NTO) - C80-9 (NTO)	Always	Below 1 Ω
C67-2 (NTB) or C80-25 (NTB) - Body ground and other terminals	Always	10 kΩ or higher
C67-1 (NTO) or C80-9 (NTO) - Body ground and other terminals	Always	10 kΩ or higher

(d) Connect the C80 TCM connector.

(e) Connect the C67 transmission revolution sensor (NT) connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NOUT) - TCM)

OK

5.	REPLACE TCM

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NEXT

PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here for Initialization: Click here

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