Nissan Sentra B18 (2020-2025) Service Manual: Symptom Diagnosis. Cvt Control System
Cvt Control System
Symptom Table
Symptom Table
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The diagnosis item number indicates the order of check. Start checking in the order from 1.
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Perform diagnoses of symptom table 1 before symptom table 2.
Symptom Table 1
|
Diagnostic item |
Reference |
Symptom |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Shift Shock |
Slips/Will Not Engage |
Other |
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|
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. |
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|
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 |
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|
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 |
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|
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 |
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|
Manual mode position |
1 |
|||||||||||||||||||||||||||||||
|
Stall test |
Work Procedure |
4 |
4 |
4 |
7 |
7 |
7 |
2 |
2 |
7 |
5 |
3 |
3 |
3 |
7 |
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|
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 |
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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. |
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|
Torque converter |
Exploded View |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
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|
Transmission range switch |
Exploded View |
2 |
2 |
3 |
4 |
3 |
3 |
3 |
4 |
6 |
5 |
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|
Oil pump |
1 |
1 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
1 |
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|
Forward clutch |
1 |
2 |
2 |
4 |
4 |
4 |
4 |
4 |
2 |
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|
Reverse brake |
1 |
2 |
3 |
5 |
5 |
4 |
4 |
3 |
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|
Planetary gear |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
2 |
1 |
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|
Bearings |
5 |
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|
Parking mechanism |
3 |
6 |
5 |
5 |
1 |
1 |
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