Nissan Sentra B18 (2020-2025) Service Manual: Symptom Diagnosis. Cvt Control System
Cvt Control System
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 |
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|
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 |
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|
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 |
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|
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 |
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|
Line pressure sensor (P0746-00, P0747-00, P0846-00, P084B-00, P0870-00, P0871-00, P0872-00, P0873-00) |
5 |
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|
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 |
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|
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 |
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|
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 |
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|
Power supply |
Diagnosis Procedure |
12 |
12 |
13 |
13 |
13 |
12 |
12 |
12 |
5 |
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|
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 |
||||||||
|
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 |
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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 |
||||||||||||||||||||||||||
|
Parking mechanism |
3 |
6 |
5 |
5 |
1 |
1 |
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Shift Lock System
Without Remote Engine Start
Component Function Check
Component Function Check
CHECK SHIFT LOCK OPERATION (PART
1)
Igni ...
Other materials:
Basic Inspection
Diagnosis and Repair Workflow
Work Flow
Work Flow
OVERALL SEQUENCE
Reference 1··· Refer to CONSULT Function.
Reference 2··· Refer to DTC Index.
Reference 3··· Refer to Symptom Table.
DETAILED FLOW
INTERVIEW AND S ...
Rear door
Door assembly
DOOR ASSEMBLY : Removal and Installation
CAUTION:
Use two people when removing or installing the rear door assembly
due to its heavy weight.
When removing and installing rear door assembly, support rear door
with a suitable tool.
REMOVAL
Remove rear do ...
Evaporative emission system
Inspection
EVAP CANISTER
1.CHECK EVAP CANISTER
Block port (B).
Blow air into port (A) and check that it flows freely out of port (C).
Release blocked port (B).
Apply vacuum pressure to port (B) and check that vacuum pressure
exists at the ports (A) and (C).
Block port (A) and (B).
...