2011 INFINITI QX56 low oil pressure

TM-100
< BASIC INSPECTION >[7AT: RE7R01B]
STALL TEST
STALL TEST
Inspection and JudgmentINFOID:0000000006226793
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 A/T fluid temperature is 50 to 80°C (122 to
176 °F). Inspect the amount of AT F. Replenish if necessary.
3. Securely engage the parking brake so that the tires do not turn.
4. Start the engine, apply foot brake, and place selector lever in “D” position.
5. Gradually press down the accelerator pedal while holding down the foot brake.
6. Quickly read off the stall speed, and quickly release the accelerator pedal. CAUTION:
Never hold down the accelerator pedal for more than 5 seconds during this test.
7. Shift the selector lever to “N” position.
8. Cool down the ATF. CAUTION:
Run the engine at idle for at least 1 minute.
9. Repeat steps 5 through 8 with selector lever in “R” position.
JUDGMENT OF STALL TEST
O: Stall speed within standard value position
H: Stall speed higher than standard value
L: Stall speed lower than standard value
Stall test standard value position
Stall speed : Refer to TM-297, "Stall Speed".
Selector lever position
Possible location of malfunction
“D” and “M” “R”
Stal l s pe ed HO
 Low brake
 1st one-way clutch
 2nd one-way clutch
OH  Reverse brake
 1st one-way clutch
 2nd one-way clutch
L L  Engine and torque converter one-way clutch
H H  Line pressure low
Does not shift-up “D” or “M” position 1 → 2 Slipping in 2GR, 3GR, 4GR or 6GR 2346 brake slippage
Does not shift-up “D” or “M” position 2 → 3 Slipping in 3GR, 4GR or 5GR Direct clutch slippage
Does not shift-up “D” or “M” position 3 → 4 Slipping in 4GR, 5GR, 6GR or 7GR High and low reverse clutch slippage
Does not shift-up “D” or “M” position 4 → 5 Slipping in 5GR, 6GR or 7GR Input clutch slippage
Does not shift-up “D” or “M” position 5 → 6 Slipping in 2GR, 3GR, 4GR or 6GR 2346 brake slippage
Does not shift-up “D” or “M” position 6 → 7 Slipping in 7GR Front brake slippage
Revision: 2010 May2011 QX56

TM-198
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
OUTPUT SPEED SENSOR
- Tighten rear extension assembly bolts to the specified torque.
 Refer to the followings when installing oil pan (2) (with oil pan gas-
ket) and clips (1) to transmission case.
CAUTION:
 Never reuse oil pan gasket and oil pan mounting bolts.
 Install oil pan gasket in the di rection to align hole position.
 Install it so that drain plug comes to the position as shown
in the figure.
 Be careful not to pinch harnesses.
 Completely remove all moisture, oil and ol d gasket, etc. from oil pan mounting surface.
- Tighten oil pan mounting bolts to the specified torque in numerical
order shown in the figure after temporarily tightening them. Tighten
necessary oil pan mounting bolts with specified torque.
2WD : Inspection and AdjustmentINFOID:0000000006228121
INSPECTION AFTER REMOVAL
Check foreign materials in oil pan to help determine causes of mal-
function. If the ATF is very dark, smells burned, or contains foreign
particles, the frictional material (clutches, band) may need replace-
ment. A tacky film that will not wipe clean indicates varnish build up.
Varnish can cause valves, servo, and clutches to stick and can
inhibit pump pressure.
If frictional material is det ected, perform A/T fluid cooler
cleaning. Refer to TM-97, "
Cleaning".
INSPECTION AFTER INSTALLATION
Check A/T fluid leakage Refer to TM-175, "Inspection".
1: Bracket
A: Bolt
B : Self-sealing bolt
JSDIA1845ZZ
: Vehicle front
: Oil pan mounting bolt
: Vehicle front
JSDIA1591ZZ
JSDIA1592GB
SCIA5199E
Revision: 2010 May2011 QX56

TM-240
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
52. Remove needle bearing from drum support edge surface.
53. Remove reverse brake piston (1) from transmission case with
compressed air. Refer to TM-222, "
Oil Channel".
CAUTION:
Care should be taken not to ab ruptly blow air. It makes pis-
tons incline, as the result, it becomes hard to disassemble
the pistons.
54. Remove D-rings from reverse brake piston.
55. Remove manual shaft retaining pin with pair of nippers. CAUTION:
Be careful not to cut retaining pin.
SCIA2796E
A : Reverse brake pressure hole
JSDIA1819ZZ
SCIA6330E
SCIA2329E
Revision: 2010 May2011 QX56

TM-272
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
OIL PUMP, 2346 BRAKE, FRONT BRAKE PISTON
7. Remove 2346 brake spring retainer (1) from oil pump assembly.
8. Remove front brake piston (1) from oil pump assembly with
compressed air. Refer to TM-222, "
Oil Channel".
CAUTION:
Care should be taken not to ab ruptly blow air. It makes pis-
ton incline, as the result, it becomes hard to disassemble
the piston.
9. Remove D-ring (inner) (1) and D-ring (outer) (2) from front brake piston.
JPDIA1096ZZ
A : Front brake pressure hole
JPDIA1097ZZ
JPDIA1098ZZ
Revision: 2010 May2011 QX56

OIL PUMP, 2346 BRAKE, FRONT BRAKE PISTONTM-273
< UNIT DISASSEMBLY AND ASSEMBLY > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
10. Remove 2346 brake piston (1) from oil pump assembly with compressed air. Refer to TM-222, "
Oil Channel".
CAUTION:
Care should be taken not to ab ruptly blow air. It makes pis-
ton incline, as the result, it becomes hard to disassemble
the piston.
11. Remove D-ring (large) (1) and D-ring (small) (2) from 2346 brake piston.
12. loosen bolts in numerical order shown in the figure and remove oil pump housing from oil pump cover.
13. Remove oil pump housing oil seal using a flat-bladed screw- driver.
CAUTION:
Be careful not to scratch oil pump housing.
A : 2346 brake pressure hole
JPDIA1099ZZ
JPDIA1100ZZ
: Bolt
JPDIA1101ZZ
SCIA2840E
Revision: 2010 May2011 QX56

TM-278
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
OIL PUMP, 2346 BRAKE, FRONT BRAKE PISTON
Set a dial indicator (A) as shown in the figure. Blow air into 2346
brake oil pressure hole (B), and measure 2346 brake clearance. If
clearance is outside the specified value, adjust clearance by select-
ing an appropriate snap ring (1). Refer to
TM-222, "
Oil Channel".
CAUTION:
Never exceed the specified air pressure value.
Air pressure
: 300kPa (3.06 kg/cm
2, 43.5 psi)
2346 brake
clearance : Refer to
TM-298, "
2346 Brake Clear-
ance".
JPDIA1148ZZ
Revision: 2010 May2011 QX56

WCS-8
< SYSTEM DESCRIPTION >
SYSTEM
LIGHT REMINDER WARNING CHIME
LIGHT REMINDER WARNING CHIME : System DiagramINFOID:0000000006222543
LIGHT REMINDER WARNING CHIME : System DescriptionINFOID:0000000006222544
WARNING CHIME OPERATION CONDITIONS
If all of the following conditions are fulfilled.
WARNING CHIME CANCEL CONDITIONS
Warning lamp/indicator lampABS warning lamp
The lamp turns ON by suspending communication.
VDC warning lamp
Brake warning lamp
IBA OFF indicator lamp
4WD warning lamp
Malfunction indicator lamp
VDC OFF indicator lamp
CRUISE warning lamp
Low tire pressure warning lamp The lamp blinking caused by suspending communication.
High beam indicator lamp
The lamp turns OFF by suspending communication.
Turn signal indicator lamp
Tail lamp indicator lamp
A/T CHECK indicator lamp
Key warning lamp
ATP warning lamp
Lane departure warning lamp
LDP ON indicator lamp
CRUISE indicator lamp
Oil pressure warning lamp
SNOW mode indicator lamp
TOW mode indicator lamp
CK SUSP indicator lamp
BSW indicator lamp
Function Specifications
JSNIA2421GB
Operation conditions
Ignition switch OFF or ACC position
Combination switch (Lighting
switch) 1st or 2nd position
Driver door Open [front door switch (driver side) ON]
Revision: 2010 May2011 QX56

WCS
DIAGNOSIS SYSTEM (COMBINATION METER)
WCS-15
< SYSTEM DESCRIPTION >
C
D E
F
G H
I
J
K L
M B A
O P
FR FOG IND
[Off] This item is displayed, but cannot be monitored.
RR FOG IND
[Off] This item is displayed, but cannot be monitored.
LIGHT IND
[On/Off] Status of light indicator lamp detected from position light request signal is received
from BCM via CAN communication.
OIL W/L
[On/Off] Status of oil pressure warning lamp detected from oil pressure switch signal is re-
ceived from BCM via CAN communication.
MIL
[On/Off] Status of malfunction indicator lamp detected from malfunctioning indicator lamp
signal is received from ECM via CAN communication.
GLOW IND
[Off] This item is displayed, but cannot be monitored.
CRUISE IND
[On/Off]  Status of CRUISE indicator detected from ASCD status signal is received from
ECM via CAN communicat ion. (ASCD models)
 Status of CRUISE indicator de tected from meter display signal is received from
ADAS control unit via CAN communication. (ICC models)
SET IND
[On/Off] Status of SET indicator detected from meter display signal is received from ADAS
control unit via CAN communication.
CRUISE W/L
[On/Off] Status of CRUISE warning lamp
judged from ICC warning lamp signal received
from ADAS control unit with CAN communication line.
BA W/L
[On/Off] Status of IBA OFF indicator lamp judged from IBA OFF indicator lamp signal re-
ceived from ADAS control unit with CAN communication line.
ATC/T-AMT W/L
[On/Off] Status of A/T CHECK warning lamp judged
from A/T CHECK indicator lamp signal
received from TCM with CAN communication line.
ATF TEMP W/L
[Off] This item is displayed, but cannot be monitored.
4WD W/L
[On/Off] Status of 4WD warning lamp judged from 4WD warning lamp signal received from
4WD control unit with
CAN communication line.
FUEL W/L
[On/Off] Low-fuel warning lamp status detected by the identified fuel level.
WASHER W/L
[On/Off] Status of low washer fluid warning judged from washer level switch input to com-
bination meter.
AIR PRES W/L
[On/Off] Status of low tire pressure warning lamp judged from low tire pressure warning
lamp signal received from BCM with CAN communication line.
KEY G/Y W/L
[On/Off] Status of KEY warning lamp
(Green/Yellow) detected from KEY warning lamp sig-
nal is received from BCM via CAN communication.
KEY KNOB W/L
[Off] This item is displayed, but cannot be monitored.
AFS OFF IND
[On/Off] Status of AFS OFF indicator lamp judged from AFS OFF indicator lamp signal re-
ceived from AFS control unit with CAN communication line.
DDS
* W/L
[Off] This item is displayed, but cannot be monitored.
LANE W/L
[On/Off] Status of lane departure warning lamp judged from lane departure warning lamp
signal received from ADAS control unit with CAN communication line.
LDP IND
[On/Off] Status of LDP ON indicator lamp judged from LDP ON indicator lamp signal re-
ceived from ADAS control unit with CAN communication line.
AT P W / L
[On/Off] Status of ATP warning lamp judged from ATP warning lamp signal received from
4WD control unit with
CAN communication line.
DCA IND
[Off] This item is displayed, but cannot be monitored.
CHECK SUS IND
[On/Off] Status of CK SUSP indicator lamp judged from CK SUSP indicator lamp signal re-
ceived from E-SUS control unit with CAN communication line.
Display item [Unit]
MAIN
SIGNALS Description
Revision: 2010 May2011 QX56