Toyota Corolla Cross Owners & Service Manuals

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

Toyota Corolla Cross (2022-2024) Service Manual / Drivetrain / K120f (cvt) / Continuously Variable Transaxle System / 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.

    Click here

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

    Click here

  • Check that no DTCs are stored after performing initialization.

    Click here

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).

Click here

(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 REVOLUTION SENSOR (NT)

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

Click here

NEXT

PERFORM REGISTRATION AND INITIALIZATION

for Registration: Click here

for Initialization: Click here

    READ NEXT:

     Output Speed Sensor Circuit Short to Battery (P072012,P072014,P072031)

    DESCRIPTION The transmission revolution sensor (NOUT) detects the output shaft speed and sends it to the TCM. The TCM determines if belt mode has been entered by comparing the transmission revol

     Pressure Control Solenoid "A" Circuit Short to Battery (P074512)

    DESCRIPTION Using current from the TCM, the shift solenoid valve SL1 controls the C1 clutch pressure in accordance with the requested shift mode. DTC No. Detection Item

     Pressure Control Solenoid "A" Circuit Short to Ground or Open (P074514)

    DESCRIPTION Refer to DTC P074512. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory No

    SEE MORE:

     Wireless Starter Component Internal Failure (B277A96)

    DESCRIPTION If the remote engine start ECU does not respond to the certification ECU (smart key ECU assembly) or the remote engine start ID is not registered, this DTC is stored. HINT: Registration status of the remote engine start ECU ID can be checked using the "Wireless C Code" item in the Data

     Precaution

    PRECAUTION NOTICE: When disassembling the headlight assembly, use static electricity countermeasures SST (desktop anti-static mat set) and observe all precautions to prevent damage to the system by electrostatic discharge (ESD). STATIC ELECTRICITY COUNTERMEASURES SST SST: Desktop antistatic mat set

    © 2020-2024 Copyright www.tcorollacross.com