RM3660EC _52 Drivetrain _080728 K313 CVT _0392261 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM C

K313 CVT  CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM  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

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

The transmission revolution sensor (NT) detects the input turbine speed and sends a signal to the ECM.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P071512 Input/Turbine Speed Sensor "A" Circuit Short to Battery 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

·

Transmission revolution sensor (NT)

·

Transmission wire

·

ECM


Comes on DTC stored SAE Code:
P07C0
P071514 Input/Turbine Speed Sensor "A" Circuit Short to Ground or Open 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

·

Transmission revolution sensor (NT)

·

Transmission wire

·

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):
·

Vehicle is driven with the shift lever in D

·

The SPD signal is 300 rpm or more

·

Output shaft speed indicated by the transmission revolution sensor (NOUT) is 1100 rpm or more

·

No malfunctions are found in the park/neutral position switch assembly

·

Input turbine speed indicated by the transmission revolution sensor (NT) is less than 300 rpm for 2 seconds


·

Wire harness or connector

·

Transmission revolution sensor (NT)

·

Transmission wire

·

ECM


Comes on DTC stored SAE Code:
P0717

MONITOR DESCRIPTION

The transmission revolution sensor (NT) is used to detect the input turbine speed. The ECM 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 ECM will determine that the transmission revolution sensor (NT) is malfunctioning, illuminate the MIL and store a DTC.

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 hereDrivetrain>K313 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>DTC CHECK / CLEAR



1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON and turn the GTS on.

3.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4.

Turn the ignition switch off and wait for 2 minutes or more.

5.

Turn the ignition switch to ON and turn the GTS on.

6.

Start the engine.

7.

Perform the D Position Shift Test inspection in Road Test. [*1]

Click hereDrivetrain>K313 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>ROAD TEST

HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.


8.

Stop the vehicle.

9.

Enter the following menus: Powertrain / Transmission / Utility / All Readiness.

10.

Input the DTC: P071512, P071514 or P071531.

11.

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

C359198E03
5.708,0.854 6.167,1.052 0.458,0.198 10 false NTB 5.719,2.073 6.177,2.271 0.458,0.198 10 false NTO 5.708,2.521 6.167,2.719 0.458,0.198 10 false E1 5.448,2.417 5.906,2.615 0.458,0.198 10 false 53 5.448,2.073 5.906,2.271 0.458,0.198 10 false 72 3.26,0.844 3.719,1.042 0.458,0.198 10 false NTB 6.344,0.677 6.802,0.875 0.458,0.198 10 false 12 V 3.24,2.073 3.698,2.271 0.458,0.198 10 false NTO 3.656,0.844 4.115,1.042 0.458,0.198 10 false 2 3.656,2.073 4.115,2.271 0.458,0.198 10 false 8 5.438,0.854 5.896,1.052 0.458,0.198 10 false 71 2.469,0.844 2.927,1.042 0.458,0.198 10 false 1 2.49,2.052 2.948,2.25 0.458,0.198 10 false 2 2.417,2.49 2.875,2.688 0.458,0.198 10 false C60 2.417,2.656 3.583,2.885 1.167,0.229 10 false Transmission Wire 0.406,2.344 1.917,2.792 1.51,0.448 10 false Transmission Revolution Sensor (NT) 0.635,3.135 3.427,3.615 2.792,0.479 10 false Continuously Variable Transaxle Assembly 6.01,2.854 6.625,3.052 0.615,0.198 10 false C78 6.01,3.01 6.625,3.208 0.615,0.198 10 false ECM

CAUTION / NOTICE / HINT

CAUTION:
·
A371909

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.


·
A356953

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 hereDrivetrain>K313 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>DTC CHECK / CLEAR

·

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

Click hereDrivetrain>K313 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>INITIALIZATION

·

Check that no DTCs are stored after performing initialization.

Click hereDrivetrain>K313 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>DTC CHECK / CLEAR



PROCEDURE

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

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Transmission / Data List.


e.

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.: 12750 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


Data is displayed in increments of 50 rpm.
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
50003 373 174,175

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



A

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

B

6.REPLACE ECM
2.CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
a.

Disconnect the C60 transmission wire connector.


b.

Disconnect the C78 ECM connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
C60-8 (NTO) - C78-72 (NTO) Always Below 1 Ω
C60-2 (NTB) - C78-71 (NTB) Always Below 1 Ω
C78-53 (E1) - Body ground Always Below 1 Ω
C60-8 (NTO) or C78-72 (NTO) - Body ground and other terminals Always 10 kΩ or higher
C60-2 (NTB) or C78-71 (NTB) - Body ground and other terminals Always 10 kΩ or higher



d.

Connect the C78 ECM connector.


e.

Connect the C60 transmission wire connector.


Result:
Proceed to
OK
NG



OK

3.CHECK ECM

NG

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

3.CHECK ECM
a.
C265778C34
0.167,1.01 0.563,1.292 0.396,0.281 1.333,0.958 1.167,0.25 1.167,0.25 0.99,0.25 true 0.25,1.063 0.708,1.26 0.458,0.198 10 false C60 0.688,0.177 1.146,0.375 0.458,0.198 10 false NTB 0.104,0.094 0.417,0.292 0.313,0.198 10 false *a
*a Front view of wire harness connector
(to Transmission Wire)


Disconnect the C60 transmission wire connector.


b.

Turn the ignition switch to ON.


c.

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

Standard Voltage:
Tester Connection Condition Specified Condition
C60-2 (NTB) - Body ground Ignition switch ON 11 to 14 V



d.

Turn the ignition switch off.


e.

Connect the C60 transmission wire connector.


f.
C266347C11
1.438,1.802 1.24,1.802 1.24,1.802 1.052,1.083 true 2.583,1.792 2.385,1.792 2.385,1.792 2.208,1.125 true 0.094,0.073 0.406,0.271 0.313,0.198 10 false *a 2.625,1.708 3.25,1.896 0.625,0.188 10 false 72 (NTO) 1.479,1.719 2.031,1.906 0.552,0.188 10 false 53 (E1)
*a Component without harness connected
(ECM)


Disconnect the C78 ECM connector.


g.

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

Standard Resistance:
Tester Connection Condition Specified Condition
72 (NTO) - 53 (E1) Always 99 to 101 Ω



Result:
Proceed to
OK
NG



OK

4.INSPECT TRANSMISSION WIRE

NG

5.REPLACE ECM
4.INSPECT TRANSMISSION WIRE
a.
C305675C01
1.073,0.906 1.604,1.052 true 1.094,1.5 1.604,1.344 true 2.24,3.281 2.385,2.615 2.385,2.615 2.552,2.615 true 2.229,3.625 2.417,4.219 2.417,4.219 2.583,4.219 true 0.323,0.115 0.635,0.271 0.313,0.156 10 false *1 1.646,0.292 1.958,0.448 0.313,0.156 10 false *a 1.656,2.5 1.969,2.656 0.313,0.156 10 false *b 2.594,2.531 3.052,2.729 0.458,0.198 10 false NTB 2.625,4.135 3.083,4.333 0.458,0.198 10 false NTO 0.948,0.813 1.125,1.01 0.177,0.198 10 false 1 0.958,1.427 1.135,1.625 0.177,0.198 10 false 2
*1 Transmission Wire
*a Transmission Revolution Sensor Side
*b Wire Harness Connector Side


Remove the transmission wire.

Click hereDrivetrain>K313 (CVT)>TRANSMISSION WIRE>REMOVAL


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1 (transmission revolution sensor side) - 2 (NTB) (wire harness connector side) Always Below 1 Ω
2 (transmission revolution sensor side) - 8 (NTO) (wire harness connector side) Always Below 1 Ω
1 (transmission revolution sensor side) or 2 (NTB) (wire harness connector side) - All other terminals Always 10 kΩ or higher
2 (transmission revolution sensor side) or 8 (NTO) (wire harness connector side) - All other terminals Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE TRANSMISSION REVOLUTION SENSOR (NT)

Click hereDrivetrain>K313 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE UNIT>COMPONENTS


NG

REPLACE TRANSMISSION WIRE

Click hereDrivetrain>K313 (CVT)>TRANSMISSION WIRE>COMPONENTS