2011 INFINITI QX56 sensor

TM-168
< SYMPTOM DIAGNOSIS >[7AT: RE7R01B]
SYSTEM SYMPTOM
Func-
tion trou-
blePoor
power
trans-
mission
Slip With selector
lever in “D”
position, ac-
celeration is
extremely
poor.
53 334 2 2 2 1
With selector
lever in “R”
position, ac-
celeration is
extremely
poor. 53 334 2 2 2 1
While starting
off by acceler-
ating in 1GR,
engine races. 3 334 2 2 2 1
While acceler-
ating in 2GR,
engine races. 3 334 2 2 22 1
While acceler-
ating in 3GR,
engine races. 3 334 2 2 22 1
While acceler-
ating in 4GR,
engine races. 3 334 2 2 22 1
While acceler-
ating in 5GR,
engine races. 3 334 2 222 2 1
While acceler-
ating in 6GR,
engine races. 3 334 2 22221
While acceler-
ating in 7GR,
engine races. 3 334 2 2 22 2 1
Lock-up 3 334 2 2 1
No creep at
all. 111111111
Extremely
large creep. 1
Symptom
Diagnostic item
Control cable
Output speed sensor
Vehicle speed signal
Accelerator pedal position sensor
Engine speed signal
Input speed sensor
A/T fluid temperature sensor
Battery voltage
Transmission range switch
Manual mode switch
Stop lamp switch
Line pressure solenoid valve
Torque converter clutch solenoid valve
Low brake solenoid valve
Front brake solenoid valve
High and low reverse clutch solenoid valve
Input clutch solenoid valve
Direct clutch solenoid valve
2346 brake solenoid valve
Anti-interlock solenoid valve
Starter relay
CAN communication
TM-101
TM-110TM-138TM-137TM-112TM-109TM-107TM-151TM-106TM-144TM-159TM-131TM-128TM-148TM-136TM-147TM-133TM-150TM-149TM-132TM-104TM-103
Revision: 2010 May2011 QX56

SYSTEM SYMPTOMTM-169
< SYMPTOM DIAGNOSIS > [7AT: RE7R01B]
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M A
B
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N
O P
SYMPTOM TABLE 2
Symptom Diagnostic item
Control cable
Output speed sensor
Vehicle speed signal
Accelerator pedal position sensor
Engine speed signal
Input speed sensor
A/T fluid temperature sensor
Battery voltage
Transmission range switch
Manual mode switch
Stop lamp switch
Line pressure solenoid valve
Torque converter clutch solenoid valve
Low brake solenoid valve
Front brake solenoid valve
High and low reverse clutch solenoid valve
Input clutch solenoid valve
Direct clutch solenoid valve
2346 brake solenoid valve
Anti-interlock solenoid valve
Starter relay
CAN communication
TM-101
TM-110TM-138TM-137TM-112TM-109TM-107TM-151TM-106TM-144TM-159TM-131TM-128TM-148TM-136TM-147TM-133TM-150TM-149TM-132TM-104TM-103
Function
trouble
Power transmis-
sion cannot be
performed Vehicle cannot run in all
position.
3 2 111111111
Driving is not possible in
“D” position. 3 2 111111111
Driving is not possible in
“R” position. 32111
Engine stall 4 5 5 6 3 2 1
Engine stalls when selec-
tor lever shifted “N” → “D”
or “R”. 455 3 2 1
Engine does not start in
“N” or “P” position. 312 1
Engine starts in position
other than “N” or “P”. 32 1
Poor operation Vehicle does not enter
parking condition.
12
Parking condition is not
cancelled. 12
Vehicle runs with A/T in
“P” position. 12
Vehicle moves forward
with the “R” position. 12
Vehicle runs with A/T in
“N” position. 12
Vehicle moves backward
with the “D” position. 12
Revision: 2010 May2011 QX56

CONTROL CABLETM-179
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
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6. Remove retainer mounting bolts ( ) according to the following procedure.
a. Separate propeller shaft assembly (front). Refer to DLN-129,
"Removal and Installation". (For 4WD models)
b. Disconnect heated oxygen sensor 2 connectors (bank 1 and bank 2). Refer to EX-5, "
Exploded View".
c. Remove exhaust front tube (RH and LH). Refer to EX-5,
"Exploded View".
d. Remove heat plates above three way catalyst (RH and LH).
e. Remove control cable mounting bracket from A/T assembly.
f. Remove retainer mounting bolts from dash panel.
7. Remove control cable from the vehicle.
INSTALLATION
Note the following, and install in the reverse order of removal.
When installing control cable (1) to A/T shift selector assembly (2),
check that control cable is fully pressed in with the ribbed (A) surface
facing upward.
Inspection and AdjustmentINFOID:0000000006226896
INSPECTION AFTER INSTALLATION
Check A/T position after adjusting A/T position. Refer to TM-101, "Inspection".
ADJUSTMENT AFTER INSTALLATION
Adjust A/T position. Refer to TM-101, "Adjustment".
JSDIA1677ZZ
JPDIA0609ZZ
Revision: 2010 May2011 QX56

CONTROL VALVE & TCMTM-183
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
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2. Remove clips (1).
3. Remove oil pan (2) and oil pan gasket.
4. Remove magnets (1) from oil pan.
5. Remove snap ring (1) from joint connector (2).
6. Push joint connector (1).
7. Disconnect output speed sensor connector (A). CAUTION:
Be careful not to damage connector.
8. Disengage terminal clip ( ).
: Vehicle front
: Oil pan mounting bolt
JSDIA1591ZZ
JPDIA0009ZZ
JSDIA1756ZZ
JSDIA1757ZZ
JPDIA1104ZZ
Revision: 2010 May2011 QX56

CONTROL VALVE & TCMTM-185
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
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CAUTION:
 Make sure that turbine revolution sensor securely installs input speed sensor holes (A).
 Hang down output speed senso r harness toward outside so
as not to disturb installation of the control valve & TCM.
 Adjust A/T assembly harness connector of the control valve
& TCM to terminal hole of transmission case.
 Assemble it so that manual valve (1) cutout is engaged with manual plate (2) projection.
- Install bolts and clip (1) to the control valve & TCM. Tighten bolt (E) to the specified torque before tightening the other than bolts.
*: Reamer bolt
 Refer to the following when installing oil pan to transmission case.CAUTION:
 Clean foreign materials (gear wear particles) that adhere on the inside of the oil pan and on the
magnet, and then assembly.
 Completely remove all moisture, oil and old gasket, etc. from oil pan gasket mounting surface of
transmission case and oil pan.
 Never reuse oil pan gasket and oil pan mounting bolts.
 Install oil pan gasket in the di rection to align hole position.
- Tighten the oil pan mounting bolts to the specified torque in the numerical order as shown in the figure after temporarily tightening
them.
JPDIA1106ZZ
JPDIA0012ZZ
: Vehicle front
Bolt symbol Length mm (in) Number of bolts A 43 (1.69) 3
B 40 (1.57) 2
C 54 (2.13) 6
D 50 (1.97) 2
E* 50 (1.97) 1
: Vehicle front
JPDIA1105ZZ
JSDIA1592GB
Revision: 2010 May2011 QX56

TM-186
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
CONTROL VALVE & TCM
Inspection and Adjustment
INFOID:0000000006226901
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".
ADJUSTMENT AFTER INSTALLATION
 Adjust A/T fluid level. Refer to TM-95, "Adjustment".
 Perform decel G sensor calibration when replacing control valve & TCM. Refer to TM-92, "
Special Repair
Requirement".
SCIA5199E
Revision: 2010 May2011 QX56

OUTPUT SPEED SENSORTM-195
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
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OUTPUT SPEED SENSOR
2WD
2WD : Exploded ViewINFOID:0000000006228119
2WD : Removal and InstallationINFOID:0000000006228120
REMOVAL
1. Disconnect the battery cabl e from the negative terminal.
2. Drain ATF through drain plug.
3. Separate propeller shaft assembly. Refer to DLN-143, "
Exploded View".
1. A/T 2. Oil pan gasket 3. Oil pan
4. Clip 5. Oil pan mounting bolt 6. Overflow plug
7. Drain plug 8. Drain plug gasket 9. Magnet
10. Output speed sensor 11. Self-sealing bolt 12. Bracket
13. Rear extension
*: Apply Genuine Anaerobic Liquid Gasket or equivalent. Refer to GI-22, "Recommended Chemical Products and Sealants".
Refer to GI-4, "
Components" for symbols not described on the above.
JSDIA1925GB
Revision: 2010 May2011 QX56

TM-196
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
OUTPUT SPEED SENSOR
4. Remove clips (1).
5. Remove oil pan (2) and oil pan gasket.
6. Support A/T assembly with a transmission jack.
CAUTION:
When setting transmission j ack, place wooden blocks to
prevent from damaging control valve & TCM and transmis-
sion case.
7. Remove rear engine mounting cross member with power tool. Refer to TM-205, "
2WD : Exploded View".
8. Remove engine mounting insulator (rear). Refer to TM-205, "
2WD : Exploded View".
9. Remove tightening bolts for rear extension assembly and trans- mission case.
10. Tap rear extension assembly with a soft hammer (A). CAUTION:
Be careful not to damage rear extension case.
11. Remove rear extension assembly (with needle bearing) from transmission case.
: Vehicle front
: Oil pan mounting bolt
1 : Bracket
A: Bolt
B : Self-sealing bolt
JSDIA1591ZZ
JSDIA1845ZZ
JPDIA0027ZZ
SCIA3431E
Revision: 2010 May2011 QX56