2006 NISSAN VERSA Workshop Service Repair Manual

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Page 937 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual CVT-40
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
CVT Electrical Parts LocationUCS005Y9
BCIA0033E

Page 938 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual TROUBLE DIAGNOSIS
CVT-41
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Revision: June 20062007 Versa
1. O/D OFF indicator lamp 2. Shift position indicator 3. Accelerator pedal position sensor
4. CVT unit harness connect

Page 939 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual CVT-42
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
Circuit DiagramUCS005YA
BCWA0667E

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NISSAN VERSA 2006 Workshop Service Repair Manual TROUBLE DIAGNOSIS
CVT-43
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Revision: June 20062007 Versa
Inspections before Trouble DiagnosisUCS005YB
CVT FLUID CHECK
Fluid Leakage and Fluid Level Check
Inspect for fluid l

Page 941 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual CVT-44
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
6. While holding down the foot brake, gradually press down the
accelerator pedal.
7. Quickly read off the stall speed, and then quickly remove yo

Page 942 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual TROUBLE DIAGNOSIS
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LINE PRESSURE TEST
Line Pressure Test Port
Line Pressure Test Procedure
1. Inspect the amount of engine oil and replen

Page 943 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual CVT-46
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
Line Pressure
*: Reference values
Judgement of Line Pressure Test
Road TestUCS005YC
DESCRIPTION
The purpose of the test is to determine overall

CVT-46
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
Line Pressure
*: Reference values
Judgement of Line Pressure Test
Road TestUCS005YC
DESCRIPTION
The purpose of the test is to determine overall performance of
CVT and analyze causes of problems.
The road test consists of the following three parts:
1. “Check Before Engine Is Started” CVT-49
.
2. “Check at Idle” CVT-49
.
3. “Cruise Test” CVT-50
.
Engine speed Line pressure kPa (kg/cm
2 , psi)
“R”, “D” and “L” positions
At idle 650 (6.63, 94.3)
At stall 4,250 (43.35, 616.3)*
Judgement Possible cause
Idle speedLow for all positions
(“P”, “R”, “N”, “D”, “L”)Possible causes include malfunctions in the pressure supply system and low oil pump output.
For example
Oil pump wear
Pressure regulator valve or plug sticking or spring fatigue
Oil strainer oil pump pressure regulator valve passage oil leak
Engine idle speed too low
Only low for a specific
positionPossible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
HighPossible causes include a sensor malfunction or malfunction in the line pressure adjustment
function.
For example
Accelerator pedal position signal malfunction
CVT fluid temperature sensor malfunction
Pressure control solenoid A (line pressure solenoid) malfunction (sticking in OFF state, filter
clog, cut line)
Pressure regulator valve or plug sticking
Stall speedLine pressure does
not rise higher than
the line pressure for
idle.Possible causes include a sensor malfunction or malfunction in the pressure adjustment func-
tion.
For example
Accelerator pedal position signal malfunction
TCM malfunction
Pressure control solenoid A (line pressure solenoid) malfunction (shorting, sticking in ON
state)
Pressure regulator valve or plug sticking
The pressure rises,
but does not enter the
standard position.Possible causes include malfunctions in the pressure supply system and malfunction in the
pressure adjustment function.
For example
Accelerator pedal position signal malfunction
Pressure control solenoid A (line pressure solenoid) malfunction (sticking, filter clog)
Pressure regulator valve or plug sticking
Only low for a specific
positionPossible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
SAT7 8 6A

Page 944 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual TROUBLE DIAGNOSIS
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Revision: June 20062007 Versa
Before road test, familiarize yourself with all test procedures and
items to check.
Perform tests on all items until

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