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Nissan Sentra B18 (2020-2025) Service Manual: Symptom Diagnosis. Cvt Control System

Cvt Control System

Symptom Table

Symptom Table

  • The diagnosis item number indicates the order of check. Start checking in the order from 1.

  • Perform diagnoses of symptom table 1 before symptom table 2.

Symptom Table 1

Diagnostic item

Reference

Symptom

Shift Shock

Slips/Will Not Engage

Other

Large shock (N→ D position)

Large shock (N→ R position)

Shock is too large for lock-up.

Nissan Sentra Vehicle cannot be started from D position.

Nissan Sentra Vehicle cannot be started from R position.

Does not lock-up.

Does not hold lock-up condition.

Lock-up is not released.

When shifted to D position, acceleration is extremely poor.

When shifted to R position, acceleration is extremely poor.

Slips at lock-up.

No creep at all.

Nissan Sentra Vehicle cannot run in all positions.

When shifted to D position, driving is not possible.

When shifted to R position, driving is not possible.

Judder occurs during lockup.

Strange noise in D position.

Strange noise in R position.

Strange noise in N position.

Nissan Sentra Vehicle does not decelerate by engine brake.

Maximum speed low.

When shifted to P position, Nissan Sentra vehicle does not enter parking condition or, with shifted to another position, parking condition is not cancelled.

Nissan Sentra Vehicle runs with CVT in P position.

Vehicle runs with CVT in N position.

Engine stall.

Engine stalls when shifted to N → D or R.

Engine speed does not return to idle.

Does not shift.

Cannot be changed to manual mode.

Engine does not start in N or P position.

Engine starts in positions other than N or P.

Engine system

  

1

7

2

1

2

8

8

2

2

2

3

3

2

2

8

8

8

2

2

2

2

      

2

2

2

2

      

CAN communication line

Work Flow

4

3

3

4

3

3

3

6

6

6

4

4

6

4

      

6

3

3

3

      

6

6

4

4

4

    

Transmission range switch (P0705–00,P0706–00)

DTC Index

8

    

8

      

8

8

  

5

5

8

3

2

2

2

        

1

1

1

        

2

3

3

Input speed sensor (P0715–00, P0717–00, P0718–00)

  

4

5

    

5

5

3

3

3

7

7

3

7

5

5

5

3

            

3

3

  

5

      

Primary speed sensor (P0791–00, P0793–00, P0794–00)

  

5

6

    

6

6

4

4

4

8

8

4

8

6

6

6

4

            

4

4

  

6

6

    

Secondary speed sensor (P2765–00, P2767–00, P2768–00)

  

6

7

    

7

7

10

10

  

9

9

10

9

7

7

7

5

                

3

7

6

    

Line pressure sensor (P0746-00, P0747-00, P0846-00, P084B-00, P0870-00, P0871-00, P0872-00, P0873-00)

                                        

5

                    

CVT fluid temperature sensor (P0711–00, P0712–00, P0713–00)

3

    

3

  

9

9

9

9

  

12

12

9

10

9

9

9

                            

Primary pressure sensor (P084C–00, P084D–00)

    

8

    

10

10

11

11

  

10

10

11

11

10

10

10

              

8

            

Secondary pressure sensor (P0841–00, P0847–00, P0848–00)

    

9

    

11

11

12

12

  

11

11

12

12

11

11

11

              

9

            

Torque converter clutch solenoid valve (P0740–00, P0741–00, P0742–00, P0743–00, P0744–00)

6

  

11

6

6

    

5

5

5

    

5

        

7

            

5

5

          

Electric oil pump (P188E-00, P27A1-00, P27A3-00, P27A4-00, P27A5-00, P27A6-00, P28ED-00, P28EE-00, U0287-00)

                    

4

              

6

4

4

                    

Manual mode position

                                                        

1

    

Stall test

Work Procedure

   

4

    

4

4

7

7

7

2

2

7

5

3

3

3

              

7

            

CVT position

Inspection

2

2

  

2

1

2

2

      

6

6

  

6

4

4

4

        

2

3

3

      

2

3

2

2

Power supply

Diagnosis Procedure

         

12

12

      

13

13

  

13

12

12

12

                      

5

    

Control valve

Removal and Installation

9

8

10

9

5

13

13

13

13

8

14

14

13

14

13

13

13

8

4

4

4

  

4

4

10

7

5

8

      

CVT fluid level and state

Inspection

5

1

1

5

4

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

  

2

2

1

1

1

1

      

Ignition switch and starter

Wiring Diagram ,Work Flow (With 165-DSS-5000P) ,Work Flow (Without 165-DSS-5000P) ,Work Flow (Without 165-DSS-5000P)

                                                        

1

1

1

Symptom Table 2

 

Symptom

Diagnostic item

Reference

Shift Shock

Slips/Will Not Engage

Other

Large shock (N→ D position)

Large shock (N→ R position)

Shock is too large for lock-up.

Nissan Sentra Vehicle cannot be started from D position.

Nissan Sentra Vehicle cannot be started from R position.

Does not lock-up.

Does not hold lock-up condition.

Lock-up is not released.

When shifted to D position, acceleration is extremely poor.

When shifted to R position, acceleration is extremely poor.

Slips at lock-up.

No creep at all.

Nissan Sentra Vehicle cannot run in all positions.

When shifted to D position, driving is not possible.

When shifted to R position, driving is not possible.

Judder occurs during lockup.

Strange noise in D position.

Strange noise in R position.

Strange noise in N position.

Maximum speed low.

When shifted to P position, Nissan Sentra vehicle does not enter parking condition or, with shifted to another position, parking condition is not cancelled.

Nissan Sentra Vehicle runs with CVT in P position.

Vehicle runs with CVT in N position.

Engine stall.

Engine stalls when shifted to N → D or R.

Does not shift.

Torque converter

Exploded View

   

1

    

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

      

1

1

Transmission range switch

Exploded View

2

2

  

3

4

3

3

  

3

4

  

6

              

5

          

Oil pump

      

1

1

2

2

2

  

2

2

2

2

2

2

  

2

2

2

2

          

1

Forward clutch

1

    

2

        

2

    

4

4

4

    

4

    

4

    

2

    

Reverse brake

  

1

    

2

        

3

  

5

5

  

4

    

4

        

3

    

Planetary gear

                      

3

3

3

3

  

3

3

3

3

  

2

1

    

Bearings

                                

5

                

Parking mechanism

        

3

              

6

5

5

          

1

1

      
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