Nissan Maxima. Manual — part 1174
TM-160
< PERIODIC MAINTENANCE >
[CVT: RE0F09B]
STALL TEST
STALL TEST
Inspection and Judgment
INFOID:0000000010113960
INSPECTION
1. Inspect the amount of engine oil. Replenish the engine oil if necessary.
2. Drive for about 10 minutes to warm up the vehicle so that the
CVT fluid temperature is 50 to 80
°C (122 to 176°F). Inspect the
amount of CVT fluid. Replenish if necessary.
3. Securely engage parking brake so that the tires do not turn.
4. Install a tachometer where it can be seen by driver during test.
NOTE:
It is good practice to mark the point of specified engine rpm on
indicator.
5. Start engine, apply foot brake, and move selector lever to “D”
position.
6. Gradually press down accelerator pedal while holding down the
foot brake.
7. Quickly read off the stall speed, and then quickly remove your
foot from accelerator pedal.
CAUTION:
Never hold down accelerator pedal for more than 5 seconds
during this test.
8. Move selector lever to “N” position.
9. Cool down the CVT fluid.
CAUTION:
Run the engine at idle for at least 1 minute.
10. Repeat steps 6 through 9 with selector lever in “R” position.
JUDGMENT
SAT647B
SCIA7463E
Stall speed
: Refer to
.
SAT514G
Selector lever position
Expected problem location
“D”
“R”
Stall rotation
H
O
• Forward clutch
O
H
• Reverse brake
L
L
• Engine and torque converter one-way clutch
H
H
• Line pressure low
• Primary pulley
• Secondary pulley
• Steel belt
STALL TEST
TM-161
< PERIODIC MAINTENANCE >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
O: Stall speed within standard value position.
H: Stall speed is higher than standard value.
L: Stall speed is lower than standard value.
TM-162
< PERIODIC MAINTENANCE >
[CVT: RE0F09B]
LINE PRESSURE TEST
LINE PRESSURE TEST
Inspection and Judgment
INFOID:0000000010113961
INSPECTION
Line Pressure Test Procedure
1. Inspect the amount of engine oil and replenish if necessary.
2. Drive the car for about 10 minutes to warm it up so that the CVT fluid reaches in the range of 50 to 80
°C
(122 to 176
°F). Then inspect the amount of CVT fluid and replenish if necessary.
NOTE:
The CVT fluid temperature rises in the range of 50 to 80
°C (122 to 176°F) during 10 minutes of driv-
ing.
3. After warming up transaxle assembly, remove oil pressure
detection plug and install Tool.
CAUTION:
When using oil pressure gauge, be sure to use O-ring
attached to oil pressure detection plug.
4. Securely engage parking brake so that the tires do not turn.
5. Start the engine, and then measure the line pressure at both idle
and the stall speed.
CAUTION:
• Keep brake pedal pressed all the way down during mea-
surement.
• When measuring the line pressure at the stall speed.
Refer to
TM-160, "Inspection and Judgment"
.
6. Install oil pressure detection plug and tighten to the specified
torque below after the measurements are complete.
CAUTION:
• Never reuse O-ring.
• Apply CVT fluid to O-ring.
JUDGMENT
Tool number
: — (OTC3492)
SCIA7972E
SCIA7463E
Line pressure
: Refer to
.
Oil pressure detection plug : 7.5 N·m (0.77 kg-m, 66 in-lb)
SAT493G
LINE PRESSURE TEST
TM-163
< PERIODIC MAINTENANCE >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Judgment Possible
cause
Idle speed
Low for all positions
(“P”, “R”, “N”, “D”)
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
position
Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
High
Possible 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 speed
Line 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
position
Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
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