2008 NISSAN LATIO Service Repair Manual

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Page 873 of 2771

NISSAN LATIO 2008 Service Repair Manual CVT-34
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
44-3.Cruise testCVT-43
❏CVT-157, "Vehicle Speed Does Not Change in "L" Position"
❏CVT-158, "Vehicle Speed Does Not Change in ov

Page 874 of 2771

NISSAN LATIO 2008 Service Repair Manual TROUBLE DIAGNOSIS
CVT-35
< SERVICE INFORMATION >
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CVT
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CVT Electrical Parts LocationINFOID:0000000001703454
1. O/D OFF indicator lamp 2. Shift position indicator 3. Accelera

Page 875 of 2771

NISSAN LATIO 2008 Service Repair Manual CVT-36
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Circuit Diagram
INFOID:0000000001703455
Inspections before Trouble DiagnosisINFOID:0000000001703456
CVT FLUID CHECK
Fluid Leakage and Fluid Level Check

Page 876 of 2771

NISSAN LATIO 2008 Service Repair Manual TROUBLE DIAGNOSIS
CVT-37
< SERVICE INFORMATION >
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• Inspect for fluid leakage and check the fluid level. Refer to MA-19, "Checking CVT Fluid" .
Fluid Conditio

Page 877 of 2771

NISSAN LATIO 2008 Service Repair Manual CVT-38
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
6. While holding down the foot brake, gradually press down the
accelerator pedal.
7. Quickly read off the stall speed, and then quickly remove your
foo

Page 878 of 2771

NISSAN LATIO 2008 Service Repair Manual TROUBLE DIAGNOSIS
CVT-39
< SERVICE INFORMATION >
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The CVT fluid temperature rises in the range of 50 - 80°C (122 - 176°F) during 10 minutes of driving.
3. After warmi

Page 879 of 2771

NISSAN LATIO 2008 Service Repair Manual CVT-40
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Road Test
INFOID:0000000001703457
DESCRIPTION
• The purpose of the test is to determine overall performance of CVT
and analyze causes of problems.
�

CVT-40
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Road Test
INFOID:0000000001703457
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-41
.
2. “Check at Idle”CVT-41
.
3. “Cruise Test”CVT-43
.
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
Sta ll sp ee dLine 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 pres-
sure 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.
SAT786A

Page 880 of 2771

NISSAN LATIO 2008 Service Repair Manual TROUBLE DIAGNOSIS
CVT-41
< SERVICE INFORMATION >
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CVT
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• Before road test, familiarize yourself with all test procedures and
items to check.
• Perform tests on all items

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