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Infiniti G37 Coupe. Manual - part 1342
LINE PRESSURE TEST
TM-221
< ON-VEHICLE MAINTENANCE >
[5AT: RE5R05A]
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”, “M”)
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
• A/T fluid temperature sensor malfunction
• Line pressure solenoid malfunction (sticking in OFF state, filter clog, cut line)
• Pressure regulator valve or plug sticking
Stall speed
Oil pressure does not
rise higher than the oil
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 breakdown
• Line pressure solenoid malfunction (shorting, sticking in ON state)
• Pressure regulator valve or plug sticking
• Pilot valve sticking or pilot filter clogged
The pressure rises, but
does not enter the stan-
dard position.
Possible causes include malfunctions in the pressure supply system and malfunction in the
pressure adjustment function.
For example
• Accelerator pedal position signal malfunction
• Line pressure solenoid malfunction (sticking, filter clog)
• Pressure regulator valve or plug sticking
• Pilot valve sticking or pilot filter clogged
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.