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

K121 CVT  CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM  P072012  Output Speed Sensor Circuit Short to Battery  P072014  Output Speed Sensor Circuit Short to Ground or Open  P072031  Output Speed Sensor No Signal  


DESCRIPTION

The transmission revolution sensor (NOUT) detects the output shaft speed and sends it to the ECM.

The ECM determines if belt mode has been entered by comparing the transmission revolution sensor (NOUT) and (NSS) signals.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from Priority Note
P072012 Output Speed Sensor Circuit Short to Battery The transmission revolution sensor (NOUT) signal is normal but the transmission revolution sensor (NOUT) 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 (NOUT)

·

ECM


Comes on Engine A SAE Code:
P077D
P072014 Output Speed Sensor Circuit Short to Ground or Open The transmission revolution sensor (NOUT) signal is normal but the transmission revolution sensor (NOUT) 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 (NOUT)

·

ECM


Comes on Engine A SAE Code:
P077C
P072031 Output Speed Sensor No Signal Any of the following conditions are met for 5 seconds or more (1-trip detection logic):
·

When the transmission revolution sensor (NSS) signal indicates 350 rpm or more and the SPD signal indicates 11 km/h (7 mph) or more, the transmission revolution sensor (NOUT) signal indicates less than 300 rpm.

·

When the transmission revolution sensor (NC1) signal indicates 1180 rpm or more and the SPD signal indicates 11 km/h (7 mph) or more, the transmission revolution sensor (NOUT) signal indicates less than 300 rpm.


·

Wire harness or connector

·

Transmission revolution sensor (NOUT)

·

ECM


Comes on Engine A SAE Code:
P0722

MONITOR DESCRIPTION

The ECM receives signals from the transmission revolution sensor (NOUT) installed to the continuously variable transaxle and determines the output shaft speed in order to control the gear ratio.

If the ECM detects no signal from the transmission revolution sensor (NOUT) even while the vehicle is being driven, it will determine that the transmission revolution sensor (NOUT) 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: P072012, P072014 or P072031.

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

C481346E15
0.25,2.844 3.771,3.042 3.521,0.198 10 false Transmission Revolution Sensor (NOUT) 5.99,3.063 6.51,3.354 0.521,0.292 10 false ECM 5.677,1.135 6.396,1.49 0.719,0.354 10 false NOB 5.344,1.135 5.802,1.333 0.458,0.198 10 false 150 2.083,1.125 2.542,1.323 0.458,0.198 10 false 2 1.656,1.125 2.219,1.365 0.563,0.24 10 false NOB 1.646,2.104 2.188,2.333 0.542,0.229 10 false NOO 2.073,2.104 2.531,2.302 0.458,0.198 10 false 1 5.365,2.104 5.823,2.302 0.458,0.198 10 false 151 5.677,2.104 6.135,2.302 0.458,0.198 10 false NOO 5.979,2.896 6.438,3.094 0.458,0.198 10 false C71 0.25,2.677 0.708,2.875 0.458,0.198 10 false C36 6.302,0.958 6.76,1.156 0.458,0.198 10 false 12 V

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 (NO 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
NO Sensor Voltage Transmission revolution sensor (NOUT) 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
NO Sensor Voltage
50003 372 928
Result:
Result Proceed to
The value of NO 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 (NO SENSOR SPEED)

B

5.INSPECT TRANSMISSION REVOLUTION SENSOR (NOUT)
2.READ VALUE USING GTS (NO 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
NO Sensor Speed Output shaft speed (NOUT) Min.: 0 rpm
Max.: 65535 rpm 		0 rpm: Vehicle stopped -
Powertrain > Engine > Data List
Tester Display
NO Sensor Speed
50003 372 927
Result:
Result Proceed to
The value of NO Sensor Speed is 0 rpm A
None of the above conditions are met B




A

3.READ VALUE USING GTS (NO SENSOR SPEED)

B

5.INSPECT TRANSMISSION REVOLUTION SENSOR (NOUT)
3.READ VALUE USING GTS (NO 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
NSS Sensor Speed Secondary pulley speed (NSS) Min.: 0 rpm
Max.: 65535 rpm 		Equal to NO Sensor Speed: Vehicle being driven in belt mode -
NO Sensor Speed Output shaft speed (NOUT) Min.: 0 rpm
Max.: 65535 rpm 		Equal to NSS Sensor Speed: Vehicle being driven in belt mode -
Shift Mode Shift mode status Gear Mode or Belt Mode - -
Powertrain > Engine > Data List
Tester Display
NSS Sensor Speed
NO Sensor Speed
Shift Mode
50003 372 925,927,938
Result:
Result Proceed to
The value of NSS Sensor Speed and NO Sensor Speed are the same A
The value of NSS Sensor Speed and NO Sensor Speed are different B




A

4.REPLACE ECM

B

5.INSPECT TRANSMISSION REVOLUTION SENSOR (NOUT)
5.INSPECT TRANSMISSION REVOLUTION SENSOR (NOUT)

Click hereDrivetrain>K121 (CVT)>REVOLUTION SENSOR (NOUT SENSOR)>INSPECTION

Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NOUT) - ECM)

NG

REPLACE TRANSMISSION REVOLUTION SENSOR (NOUT)

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


6.CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NOUT) - ECM)

Pre-procedure1

a.

Disconnect the C36 transmission revolution sensor (NOUT) connector.


b.

Disconnect the C71 ECM connector.


Procedure1

c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
C36-1 (NOO) - C71-151 (NOO) Always Below 1 Ω
C36-2 (NOB) - C71-150 (NOB) Always Below 1 Ω
C36-1 (NOO) or C71-151 (NOO) - Body ground and other terminals Always 10 kΩ or higher
C36-2 (NOB) or C71-150 (NOB) - Body ground and other terminals Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

Connect the C71 ECM connector.


e.

Connect the C36 transmission revolution sensor (NOUT) connector.



OK

7.REPLACE ECM

NG

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