Toyota CH-R Service Manual: Input / Turbine Speed Sensor "A" Circuit No Signal (P0717,P07BF,P07C0)

Toyota CH-R Service Manual / K114 Cvt / Continuously Variable Transaxle System / Input / Turbine Speed Sensor "A" Circuit No Signal (P0717,P07BF,P07C0)

DESCRIPTION

The ECM receives a signal from the transmission revolution sensor (NT) installed in the continuously variable transaxle to control the lock-up engagement pressure and forward and reverse clutch pressure.

The transmission revolution sensor (NT) detects the continuously variable transaxle input shaft speed and sends a signal to the ECM.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0717

Input / Turbine Speed Sensor "A" Circuit No Signal

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

  • Vehicle is driven with the shift lever in D
  • Output shaft speed is 300 rpm or more
  • No malfunctions are found in the park/neutral position switch
  • Input turbine speed indicated by the transmission revolution sensor (NT) is less than 300 rpm for 2 seconds
  • Wire harness or connector
  • Continuously variable transaxle assembly (Transmission revolution sensor (NT))
  • ECM

Comes on

DTC stored

P07BF

Input/Turbine Speed Sensor "A" Circuit Low

There is no malfunction in transmission revolution sensor (NT) signals, and the transmission revolution sensor (NT) output voltage is less than 0.2 V for 2 seconds (1 trip detection logic).
  • Wire harness or connector
  • Continuously variable transaxle assembly (Transmission revolution sensor (NT))
  • ECM

Comes on

DTC stored

P07C0

Input/Turbine Speed Sensor "A" Circuit High

There is no malfunction in transmission revolution sensor (NT) signals, and the transmission revolution sensor (NT) output voltage is higher than 1.8 V for 2 seconds (1 trip detection logic).
  • Wire harness or connector
  • Continuously variable transaxle assembly (Transmission revolution sensor (NT))
  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

The transmission revolution sensor (NT) detects the transaxle input shaft speed. The ECM determines the necessary gear ratio based on a comparison of the transmission revolution sensor (NT) (input shaft speed) with the transmission revolution sensor (NOUT) (output shaft speed).

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

MONITOR STRATEGY

Related DTCs

P0717: Input speed sensor (NT) / Verify pulse input

P07BF: Input speed sensor (NT) / Range check (Low voltage)

P07C0: Input speed sensor (NT) / Range check (High voltage)

Required sensors/Components

Transmission revolution sensor (NT)

Frequency of operation

Continuous

Duration Conditions

2 seconds

MIL operation

Immediately

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

Battery voltage

8 V or more

Time after Battery voltage 8 V or more

0.5 seconds or more

Write Inhibit

permit

Time after Write status forbiddance to permit

0.5 seconds or more

Ignition switch

ON

Time after Ignition switch OFF to ON

0.5 seconds or more

Starter

OFF

Time after Starter ON to OFF

0.5 seconds or more
P0717 Condition (A):

Park Neutral Position switch

OFF
P0717 Condition (B):

All of the following conditions are met:

-

Output shaft revolution

300 rpm or more

Transmission "R" range switch

OFF

Transmission Range Switch circuit fail (P0705) (Pending + MIL)

Not detected

Engine

Running

Turbine Speed Sensor Range check fail (P07BF, P07C0) (Pending / MIL)

Not detected

Output Speed Sensor revolution

1100 rpm or more

One of the following conditions is met:

-

Command to Shift Solenoid

OFF

Command to Torque Converter Clutch Solenoid

ON

Shift Solenoid circuit fail (P099B, P099C) (Pending + MIL)

Not detected

Torque Converter Clutch Solenoid circuit fail (P2769, P2770) (Pending + MIL)

Not detected

Pressure Control Solenoid circuit fail (P2822, P282B) (Pending + MIL)

Not detected
P07BF, P07C0:

Turbine Speed Sensor pulse input fail (P0717) (Pending / MIL)

Not detected

TYPICAL MALFUNCTION THRESHOLDS

P0717:

Turbine speed (Input speed) sensor revolution

Less than 300 rpm
P07BF:

Turbine speed (Input speed) sensor output voltage

Less than 0.2 V
P07C0:

Turbine speed (Input speed) sensor output voltage

Higher than 1.8 V

COMPONENT OPERATING RANGE

P0717:

Turbine speed (Input speed) sensor revolution

300 rpm or more
P07BF, P07C0:

Turbine speed (Input speed) sensor output voltage

0.2 to 1.8 V

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Perform initialization when parts related to the continuously variable transaxle are replaced.

    Click here

  • Check that no DTCs are stored after performing initialization.

    Click here

  • Perform the universal trip to clear permanent DTCs.

    Click here

HINT:

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. Drive the vehicle for 2 seconds or more at 6 km/h (4 mph) or more with the shift lever in D.
  2. Check for DTCs again.

    Click here

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.

Powertrain > Engine and ECT > Data List

Tester Display

SPD (NT)

NT Sensor Voltage

(e) In accordance with the display on the Techstream, read the Data List.

Powertrain > Engine and ECT > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

SPD (NT)

Input turbine speed

Min.: 0 rpm

Max.: 12750 rpm
  • Input turbine speed (NT) equal to engine speed (NE): Lock-up ON (After warming up engine)
  • Input turbine speed (NT) nearly equal to engine speed (NE): Lock-up OFF (Idling with shift lever in P or N)
  • 0 rpm: Vehicle stopped with shift lever in R

Data is displayed in increments of 50 rpm.

NT Sensor Voltage

Input turbine speed (NT) sensor 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)

-

Result

Proceed to

Data display is not within Normal Condition range

A

Data display is within Normal Condition range

B
B

GO TO STEP 5

A

2.

INSPECT TRANSMISSION REVOLUTION SENSOR (NT)

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

Click here

(b) Connect the battery to the sensor as shown in the illustration.

*1

Battery

-

-

*a

Component without harness connected

(Transmission Revolution Sensor (NT))

*b

Magnet

*c

5 mm or less

*d

Ammeter

(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)

OK

3.

CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NT) - ECM)

(a) Disconnect the C47 transmission revolution sensor (NT) connector.

(b) Disconnect the C63 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C47-1 (NTO) - C63-125 (NTO)

Always

Below 1 Ω

C47-2 (NTB) - C63-126 (NTB)

Always

Below 1 Ω

C47-1 (NTO) or C63-125 (NTO) - Body ground and other terminals

Always

10 kΩ or higher

C47-2 (NTB) or C63-126 (NTB) - Body ground and other terminals

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NT) - ECM)
OK

4.

REPLACE ECM

(a) Replace the ECM.

Click here

NEXT

PERFORM INITIALIZATION

5.

REPLACE ECM

(a) Replace the ECM.

Click here

NEXT

PERFORM INITIALIZATION

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