RM36D0EC _52 Drivetrain _138176 K121 CVT _0584691 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM C

K121 CVT  CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM  P274512  Intermediate Shaft Speed Sensor "B" Circuit Short to Battery  P274514  Intermediate Shaft Speed Sensor "B" Circuit Short to Ground or Open  P274531  Intermediate Shaft Speed Sensor "B" No Signal  


DESCRIPTION

The transmission revolution sensor (NC1) detects the intermediate shaft (C1 clutch) speed and sends it to the ECM.

The ECM determines if gear mode should be entered by comparing the transmission revolution sensor (NT) and (NC1) signals.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from Priority Note
P274512 Intermediate Shaft Speed Sensor "B" Circuit Short to Battery The transmission revolution sensor (NC1) signal is normal but the transmission revolution sensor (NC1) output voltage is higher than 1.8 V for 4.5 seconds or more (1-trip detection logic).
·

Wire harness or connector

·

Transmission revolution sensor (NC1)

·

ECM

·

Transmission wire


Comes on Engine A SAE Code:
P07C8
P274514 Intermediate Shaft Speed Sensor "B" Circuit Short to Ground or Open The transmission revolution sensor (NC1) signal is normal but the transmission revolution sensor (NC1) output voltage is less than 0.2 V for 4.5 seconds or more (1-trip detection logic).
·

Wire harness or connector

·

Transmission revolution sensor (NC1)

·

ECM

·

Transmission wire


Comes on Engine A SAE Code:
P07C7
P274531 Intermediate Shaft Speed Sensor "B" No Signal Any of the following conditions are met and the SPD signal indicates 10 km/h (6 mph) or more and the transmission revolution sensor (NC1) signal indicates less than 300 rpm for 5 seconds or more (1-trip detection logic).
·

When driving in gear mode, the transmission revolution sensor (NT) signal indicates 350 rpm or more

·

When driving in belt mode with the S1 synchronizer engaged, the transmission revolution sensor (NSS) signal indicates 780 rpm or more


·

Wire harness or connector

·

Transmission revolution sensor (NC1)

·

ECM

·

Transmission wire


Comes on Engine A SAE Code:
P2747

MONITOR DESCRIPTION

The ECM receives signals from the transmission revolution sensor (NC1) installed to the continuously variable transaxle and determines the intermediate shaft (C1 clutch) speed.

If the ECM detects no signal from the transmission revolution sensor (NC1) even while the vehicle is being driven, it will determine that in the transmission revolution sensor (NC1) 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>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>DTC CHECK / CLEAR



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.

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

Click hereDrivetrain>K121 (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.


4.

Stop the vehicle.

5.

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

6.

Input the DTC: P274512, P274514 or P274531.

7.

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

for SFTM Made
C501249E03
5.865,0.865 6.323,1.063 0.458,0.198 10 false NC1B 5.865,2.094 6.323,2.292 0.458,0.198 10 false NC1O 5.865,2.552 6.323,2.75 0.458,0.198 10 false E1 5.542,2.385 6,2.583 0.458,0.198 10 false 22 5.531,1.99 5.99,2.188 0.458,0.198 10 false 98 3.146,0.844 3.604,1.042 0.458,0.198 10 false NC1B 6.49,0.677 6.948,0.875 0.458,0.198 10 false 12 V 3.135,2.063 3.594,2.26 0.458,0.198 10 false NC1O 3.656,0.833 4.115,1.031 0.458,0.198 10 false 16 3.656,2.063 4.115,2.26 0.458,0.198 10 false 17 5.531,0.76 5.99,0.958 0.458,0.198 10 false 97 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 C34 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 (NC1) 0.635,3.135 3.427,3.615 2.792,0.479 10 false Continuously Variable Transaxle Assembly 6.115,2.896 6.729,3.094 0.615,0.198 10 false ECM 5.5,0.948 6.115,1.146 0.615,0.198 10 false C71 5.51,2.188 6.125,2.385 0.615,0.198 10 false C71 5.469,2.563 6.083,2.76 0.615,0.198 10 false A116

for GTMC Made
C501249E04
5.865,0.865 6.323,1.063 0.458,0.198 10 false NC1B 5.865,2.094 6.323,2.292 0.458,0.198 10 false NC1O 5.865,2.552 6.323,2.75 0.458,0.198 10 false E1 5.542,2.385 6,2.583 0.458,0.198 10 false 22 5.531,1.99 5.99,2.188 0.458,0.198 10 false 98 3.146,0.844 3.604,1.042 0.458,0.198 10 false NC1B 6.49,0.677 6.948,0.875 0.458,0.198 10 false 12 V 3.135,2.063 3.594,2.26 0.458,0.198 10 false NC1O 3.656,0.833 4.115,1.031 0.458,0.198 10 false 16 3.656,2.063 4.115,2.26 0.458,0.198 10 false 17 5.531,0.76 5.99,0.958 0.458,0.198 10 false 97 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 C34 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 (NC1) 0.635,3.135 3.427,3.615 2.792,0.479 10 false Continuously Variable Transaxle Assembly 6.115,2.896 6.729,3.094 0.615,0.198 10 false ECM 5.5,0.948 6.115,1.146 0.615,0.198 10 false C71 5.51,2.188 6.125,2.385 0.615,0.198 10 false C71 5.458,2.563 6.073,2.76 0.615,0.198 10 false A125

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>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>DTC CHECK / CLEAR

·

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

Click hereDrivetrain>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>PRECAUTION

·

Check that no DTCs are stored after performing initialization.

Click hereDrivetrain>K121 (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>DTC CHECK / CLEAR



PROCEDURE

1.READ VALUE USING GTS (NC1 SENSOR VOLTAGE)
a.

According to the display on the GTS, read the Data List.

Powertrain > Engine > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
NC1 Sensor Voltage Transmission revolution sensor (NC1) 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 > Engine > Data List
Tester Display
NC1 Sensor Voltage
50003 372 541
Result:
Result Proceed to
The value of NC1 Sensor Voltage is between 0.2 and 1.8 V A
None of the above conditions are met B




A

2.READ VALUE USING GTS (NC1 SENSOR SPEED)

B

5.CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
2.READ VALUE USING GTS (NC1 SENSOR SPEED)
a.

According to the display on the GTS, read the Data List.

Powertrain > Engine > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
NC1 Sensor Speed Intermediate shaft (C1 clutch) speed (NC1) Min.: 0 rpm
Max.: 65535 rpm 		0 rpm: Vehicle stopped and synchronizer engaged -
Status of Synchronize Synchronizer status OFF or ON
·

OFF: Synchronizer not engaged

·

ON: Synchronizer engaged


-
Powertrain > Engine > Data List
Tester Display
NC1 Sensor Speed
Status of Synchronize
50003 372 540,934
Result:
Result Proceed to
The value of NC1 Sensor Speed is 0 rpm A
None of the above conditions are met B




A

3.READ VALUE USING GTS (NC1 SENSOR SPEED)

B

5.CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
3.READ VALUE USING GTS (NC1 SENSOR SPEED)
a.

According to the display on the GTS, read the Data List.

Powertrain > Engine > 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 NC1 Sensor Speed: Vehicle being driven in gear mode -
NC1 Sensor Speed Intermediate shaft (C1 clutch) speed (NC1) Min.: 0 rpm
Max.: 65535 rpm 		Equal to NT Sensor Speed: Vehicle being driven in gear mode -
Shift Mode Shift mode status Gear Mode or Belt Mode - -
Powertrain > Engine > Data List
Tester Display
NT Sensor Speed
NC1 Sensor Speed
Shift Mode
50003 372 929,540,938
Result:
Result Proceed to
The value of NT Sensor Speed and NC1 Sensor Speed are the same A
The value of NT Sensor Speed and NC1 Sensor Speed are different B




A

4.REPLACE ECM

B

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

Pre-procedure1

a.

Disconnect the C34 transmission wire connector.


b.

for SFTM Made:

Disconnect the A116 and C71 ECM connector.


c.

for GTMC Made:

Disconnect the A125 and C71 ECM connector.


Procedure1

d.

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

Standard Resistance (for SFTM Made):
Tester Connection Condition Specified Condition
C34-16 (NC1B) - C71-97 (NC1B) Always Below 1 Ω
C34-17 (NC1O) - C71-98 (NC1O) Always Below 1 Ω
A116-22 (E1) - Body ground Always Below 1 Ω
C34-16 (NC1B) or C71-97 (NC1B) - Body ground and other terminals Always 10 kΩ or higher
C34-17 (NC1O) or C71-98 (NC1O) - Body ground and other terminals Always 10 kΩ or higher


Standard Resistance (for GTMC Made):
Tester Connection Condition Specified Condition
C34-16 (NC1B) - C71-97 (NC1B) Always Below 1 Ω
C34-17 (NC1O) - C71-98 (NC1O) Always Below 1 Ω
A125-22 (E1) - Body ground Always Below 1 Ω
C34-16 (NC1B) or C71-97 (NC1B) - Body ground and other terminals Always 10 kΩ or higher
C34-17 (NC1O) or C71-98 (NC1O) - Body ground and other terminals Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

e.

for SFTM Made:

Connect the A116 and C71 ECM connector.


f.

for GTMC Made:

Connect the A125 and C71 ECM connector.


g.

Connect the C34 transmission wire connector.



OK

6.CHECK ECM

NG

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

6.CHECK ECM

Pre-procedure1

a.

Disconnect the C34 transmission wire connector.


b.

Turn the ignition switch to ON.


Procedure1

c.
C399576C20
1.594,0.135 2.01,0.385 0.417,0.25 0.938,1.833 1.604,1.5 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 0.542,1.76 1.156,1.958 0.615,0.198 10 false NC1B 1.677,0.188 2.135,0.385 0.458,0.198 10 false C34
*a Front view of wire harness connector (to Transmission Wire)


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

Standard Voltage:
Tester Connection Condition Specified Condition
C34-16 (NC1B) - Body ground Ignition switch ON 11 to 14 V



Post-procedure1

d.

Turn the ignition switch off.


e.

Connect the C34 transmission wire connector.


Pre-procedure2

f.

for SFTM Made:

Disconnect the A116 and C71 ECM connector.


g.

for GTMC Made:

Disconnect the A125 and C71 ECM connector.


Procedure2

h.

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

C499421C01
4.5,0.906 5.083,2.417 true 2.479,2.375 2.948,1.323 true 0.167,0.167 0.479,0.323 0.313,0.156 10 false *a 5.188,2.417 5.5,2.615 0.313,0.198 10 false E1 2.146,2.406 2.76,2.604 0.615,0.198 10 false NC1O
*a Component without harness connected
(ECM) 		- -


Standard Resistance:
Tester Connection Condition Specified Condition
98 (NC1O) - 22 (E1) Always 99 to 101 Ω


Result:
Proceed to
OK
NG



Post-procedure2

i.

for SFTM Made:

Connect the A116 and C71 ECM connector.


j.

for GTMC Made:

Connect the A125 and C71 ECM connector.



OK

7.INSPECT TRANSMISSION WIRE

NG

8.REPLACE ECM
7.INSPECT TRANSMISSION WIRE

Pre-procedure1

a.

Disconnect the C34 transmission wire connector.


b.

Disconnect the transmission wire connector from the transmission revolution sensor (NC1).

HINT:

Click hereDrivetrain>K121 (CVT)>REVOLUTION SENSOR (NC1 SENSOR)>REMOVAL



Procedure1

c.
C398926C01
1.021,0.719 1.604,1.052 true 1.031,1.667 1.615,1.333 true 2.01,3.875 2.594,3.542 true 1.833,3.938 2.583,4.271 true 0.188,0.177 0.5,0.333 0.313,0.156 10 false *1 1.667,0.26 1.979,0.417 0.313,0.156 10 false *a 1.604,2.26 1.917,2.417 0.313,0.156 10 false *b 2.635,3.458 3.25,3.656 0.615,0.198 10 false NC1B 2.635,4.198 3.25,4.396 0.615,0.198 10 false NC1O 0.917,0.635 1.531,0.833 0.615,0.198 10 false 1 0.906,1.594 1.521,1.792 0.615,0.198 10 false 2
*1 Transmission Wire
*a Transmission Revolution Sensor Side
*b Wire Harness Connector Side


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

Standard Resistance:
Tester Connection Condition Specified Condition
1 (transmission revolution sensor side) - 16 (NC1B) (wire harness connector side) Always Below 1 Ω
2 (transmission revolution sensor side) - 17 (NC1O) (wire harness connector side) Always Below 1 Ω
1 (transmission revolution sensor side) or 16 (NC1B) (wire harness connector side) - All other terminals Always 10 kΩ or higher
2 (transmission revolution sensor side) or 17 (NC1O) (wire harness connector side) - All other terminals Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

None



OK

REPLACE TRANSMISSION REVOLUTION SENSOR (NC1)

Click hereDrivetrain>K121 (CVT)>REVOLUTION SENSOR (NC1 SENSOR)>REMOVAL


NG

REPLACE TRANSMISSION WIRE

Click hereDrivetrain>K121 (CVT)>TRANSMISSION WIRE>REMOVAL