2011 INFINITI QX56 engine

TM-96
< BASIC INSPECTION >[7AT: RE7R01B]
A/T FLUID
1. Install the O-ring (315268E000) (A) to the charging pipe
(310811EA5A) (B).
2. Start the engine.
3. Make the ATF temperature approximately 40 °C (104 °F).
NOTE:
The ATF level is greatly affected by the temperature. Always
check the ATF temperature on “ATF TEMP 1” of “Data Monitor”
using CONSULT-III.
4. Park vehicle on level surface and set parking brake.
5. Shift the selector lever through each gear position. Leave selec- tor lever in “P” position.
6. Lift up the vehicle.
7. Check the ATF leakage from transmission.
8. Remove overflow plug from oil pan.
9. Install the charging pipe (A) to the overflow plug hole. CAUTION:
Tighten the charging pipe by hand.
10. Install the bucket pump hose (B) to the charging pipe. CAUTION:
Insert the bucket pump hose all the way to the end of the
charging pipe.
11. Fill approximately 0.5 liters (1/2 US qt, 1/2 lmp qt) of the ATF.
12. Check that the ATF leaks when removing the charging pipe and the bucket pump hose. If the A TF does not leak, refill the ATF.
CAUTION:
Perform “Step 12” with the engine at idle.
13. When the ATF starts to drip, tighten the overflow pl ug to the oil pan to the specified torque. Refer to TM-
182, "Exploded View".
CAUTION:
Never reuse overflow plug.
JSDIA1334ZZ
JSDIA1335ZZ
Revision: 2010 May2011 QX56

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

A/T POSITIONTM-101
< BASIC INSPECTION > [7AT: RE7R01B]
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A/T POSITION
InspectionINFOID:0000000006226794
1. Place selector lever in “P” position, and turn ignition switch ON (engine stop).
2. Check that selector lever can be shifted to other than “P” position when brake pedal is depressed. Also
check that selector lever can be shifted from “P” position only when brake pedal is depressed.
3. Shift the selector lever and check for excessive effort, sticking, noise or rattle.
4. Confirm that the selector lever stops at each pos ition by feeling the engagement when it is moved through
all the positions. Check whether or not the actual pos ition the selector lever matches the position shown
by the shift position indicator and the A/T body.
5. The method of operating the lever to individual positions cor- rectly is shown in the figure.
6. When selector button is pressed in “P”, “R”, or “N” position with-
out applying forward/backward force to selector lever, check but-
ton operation for sticking.
7. Confirm that the back-up lamps illuminate only when lever is placed in the “R” position. Confirm that the back-up lamps do not
illuminate when selector lever is pushed against “R” position in
the “P” or “N” position.
8. Confirm that the engine can only be started with the selector lever in the “P” and “N” positions. (With selector lever in the “P”
position, engine can be started even when selector lever is
moved forward and backward.)
9. Make sure that A/T is locked completely in “P” position.
10. When selector lever is set to manual shift gate, ma ke sure that manual mode is displayed on combination
meter.
In addition, a set shift position must be changed when t he selector lever is shifted to the “+” or “−” side in
the manual mode. (Only while driving.)
AdjustmentINFOID:0000000006379166
1. Shift selector lever in “P” position.
2. Loosen nut (1).
3. Turn the manual lever (2) all the way in the “P” range direction
[ (A)].
4. Hold and push the control cable (3 ) in the vehicle front direction
[ (B)], and tighten the nut by hand with cable set in free condi-
tion.
CAUTION:
Be careful not put any load to manual lever.
NOTE:
Press control cable with a force of 9.8 N (approximately 1 kg, 2.2
lb).
5. Tighten nut to specified torque. Refer to TM-178, "
Exploded View".
JSDIA0790GB
JSDIA1587ZZ
Revision: 2010 May2011 QX56

U1000 CAN COMM CIRCUITTM-103
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000006226798
CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle mul-
tiplex communication line with high data communica tion speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicl e, and each control unit shares information and links
with other control units during operation (not independently ). In CAN communication, control units are con-
nected with 2 communication lines (CAN-H line, CAN-L li ne) allowing a high rate of information transmission
with less wiring. Each control unit transmits/recei ves data but selectively reads required data only.
DTC LogicINFOID:0000000006226799
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Run engine for at least 2 cons ecutive seconds at idle speed.
3. Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”
Is
“U1000” detected?
YES >> Go to TM-103, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226800
Go to LAN-18, "Trouble Diagnosis Flow Chart".
DTC Trouble diagnosis name DTC is detected if... Possible cause
U1000 CAN Communication Line TCM is not transmitting or re-
ceiving CAN communication
signal for 2 seconds or more. Harness or connectors
(CAN communication line is
open or shorted.)
TCM
Revision: 2010 May2011 QX56

TM-106
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P0705 TRANSMISSION RANGE SWITCH A
P0705 TRANSMISSION RANGE SWITCH A
DTC LogicINFOID:0000000006226804
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “ACCELE POSI” and “VHCL/S SE-A/T” in “Data Monitor” in “TRANSMISSION”.
3. Shift the selector lever throughout the entire shift positi on from “P” to “D”. (Hold the selector lever at each
position for 2 seconds or more)
4. Drive vehicle and maintain the following conditions for 2 seconds or more.
5. Perform “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P0705” detected?
YES >> Go to TM-106, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226805
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-182, "Exploded View".
NO >> Repair or replace damaged parts.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P0705 Transmission Range Switch A
Circuit (PRNDL Input) The TCM detects an ON/OFF
combination pattern other than
that of the transmission range
switches 1, 2, 3 and 4. (For ON/
OFF combination patterns of
transmission range switches,
refer to
TM-12, "
A/T CONTROL
SYSTEM : Transm ission Range
Switch".)  Harness or connectors
(Transmission range switch-
es 1, 2, 3, 4 and TCM circuit
is open or shorted.)
 Transmission range switches
1, 2, 3 and 4
ACCELE POSI : More than 1.0/8
VHCL/S SE-A/T : 10 km/h (7 MPH) or more
Revision: 2010 May2011 QX56

P0710 TRANSMISSION FLUID TEMPERATURE SENSOR A
TM-107
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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P0710 TRANSMISSION FLUI D TEMPERATURE SENSOR A
DTC LogicINFOID:0000000006226806
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “SLCT LVR POSI” and “VHCL/S SE-A/T ” in “Data Monitor” in “TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 14 minutes or more.
4. Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P0710” detected?
YES >> Go to TM-107, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226807
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-182, "Exploded View".
DTC Trouble diagnosis name DTC is detected if... Possible cause
P0710 Transmission Fluid Tempera-
ture Sensor A Circuit TCM judges that the A/T fluid temperature is -40
°C (-40
° F) or less continuously for 5 seconds while driving at 10
km/h (7 MPH) or more.  Harness or connectors
(Sensor circuit is open.)
 A/T fluid temperature sensor
TCM judges that the A/T fluid temperature is 180 °C (356
° F) or more continuously for 5 seconds.  Harness or connectors
(Sensor circuit is short.)
 A/T fluid temperature sensor
TCM judges the following conditions while driving the ve-
hicle at 10 km/h (7 MPH) or more:
 The time required for A/T fluid temperature to rise by 1 °C (1.8 °F) exceeds 14 minutes when A/T fluid tem-
perature is -20 °C (-4 °F) or less.
 The time required for A/T fluid temperature to rise by 1 °C (1.8 °F) exceeds 7 minutes when A/T fluid tem-
perature is between -19 °C (-2 °F) and 0 °C (32 °F).
 The time required for A/T fluid temperature to rise by 1 °C (1.8 °F) exceeds 4 minutes when A/T fluid tem-
perature is between 1 °C (34 °F) and 20 °C (68 °F).  Harness or connectors
(Sensor circuit is stuck.)
 A/T fluid temperature
sensor
SLCT LVR POSI : D
VHCL/S SE-A/T : 10 km/h (7 MPH) or more
Revision: 2010 May2011 QX56

P0717 INPUT SPEED SENSOR ATM-109
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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P0717 INPUT SPEED SENSOR A
DTC LogicINFOID:0000000006226808
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “SLCT LVR POSI”, “GEAR”, “VHCL/S SE-A/ T”, “W/O THL POS” and “ENGINE SPEED” in “Data
Monitor” in “TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 5 seconds or more. CAUTION:
Keep the same gear position.
NOTE:
Driving the vehicle uphill (increased engine load) will hel p maintain the driving conditions required for this
test.
4. Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P0717” detected?
YES >> Go to TM-109, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226809
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-182, "Exploded View".
NO >> Repair or replace damaged parts.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P0717 Input/Turbine Speed Sensor A
Circuit No Signal The revolution of input speed
sensor 1 and/or 2 is 270 rpm or
less. Harness or connectors
(Sensor circuit is open.)
 Input speed sensor 1 and/or 2
SLCT LVR POSI : D
GEAR : 2nd, 3rd, 4th, 5th or 6th
VHCL/S SE-A/T : More than 40 km/h (25 MPH)
W/O THL POS : ON
ENGINE SPEED : More than 1,500 rpm
Revision: 2010 May2011 QX56

TM-110
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P0720 OUTPUT SPEED SENSOR
P0720 OUTPUT SPEED SENSOR
DTC LogicINFOID:0000000006226810
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
 Always drive vehicle at a safe speed.
 Be careful not to rev engine into
the red zone on the tachometer.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “ESTM VSP SIG” in “Data Monitor” in “TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 60 seconds or more.
4. Perform “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P0720” detected?
YES >> Go to TM-110, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226811
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
DTC Trouble diagnosis name DTC is detected if... Possible cause
P0720 Output Speed Sensor Circuit  The vehicle speed detected
by the output speed sensor is
5 km/h (3MPH) or less when
the vehicle speed transmitted
from the combination meter
to TCM is 20 km/h or more.
(Only when starts after the ig-
nition switch is turned ON.)
 The vehicle speed transmit- ted from the combination
meter to TCM does not de-
crease despite the 36 km/h
(23 MPH) or more of deceler-
ation in vehicle speed detect-
ed by the output speed
sensor. when the vehicle
speed detected by the output
speed sensor is 36 km/h (23
MPH) or more and the vehicle
speed transmitted from the
combination meter to TCM is
24 (15 MPH) or more.  Harness or connectors
(Sensor circuit is open.)
 Output speed sensor
ESTM VSP SIG : 40 km/h (25 MPH) or more
Revision: 2010 May2011 QX56