2011 INFINITI QX56 manual transmission

TM-166
< SYMPTOM DIAGNOSIS >[7AT: RE7R01B]
SYSTEM SYMPTOM
SymptomDiagnostic 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 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
Func-
tion
trouble
Gear
does no
change “D” position Locks in 1GR 1 1 1 1
Locks in 2GR
Locks in 3GR
Locks in 4GR
Locks in 5GR 1
Locks in 6GR
Locks in 7GR
1GR
→ 2GR 1 1 1 1
2GR → 3GR 1
3GR → 4GR 2 22 2222 1
4GR → 5GR 1 1
5GR → 6GR 1
6GR → 7GR 1 1 1 1 1
5GR → 4GR 1
4GR → 3GR 1 1 1
3GR → 2GR 1 1
2GR → 1GR 1 1 1
Does not lock-up 2 22245 32222222 2 2 1
“M” posi-
tion 1GR
⇔ 2GR 3 33 32 3333333 3 3 1
2GR ⇔ 3GR 3 33 32 3333333 3 3 1
3GR ⇔ 4GR 3 33 32 3333333 3 3 1
4GR ⇔ 5GR 3 33 32 3333333 3 3 1
5GR ⇔ 6GR 3 33 32 3333333 3 3 1
6GR ⇔ 7GR 3 33 32 3333333 3 3 1
Revision: 2010 May2011 QX56

SYSTEM SYMPTOMTM-167
< SYMPTOM DIAGNOSIS > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
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
Func-
tion trou-
ble
Poor
shiftingSlip
When
shifting
gears1GR
⇔ 2GR 3 3 3 4 2 2 1
2GR ⇔ 3GR 3 3 3 4 2 2 1
3GR ⇔ 4GR 3 3 3 4 2 2 2 2 1
4GR ⇔ 5GR 3 3 3 4 2 2 2 1
5GR ⇔ 6GR 3 3 3 4 2 2 2 1
6GR ⇔ 7GR 3 3 3 4 2 2 2 1
Engine
brake
does
not
work “D” position
→ “M” posi-
tion 5556423 33 1
“M” po-
sition 7GR
→ 6GR 5 5 5 6 4 2 3 3 3 1
6GR → 5GR 5 5 5 6 4 2 3 3 3 1
5GR → 4GR 5 5 5 6 4 2 3 3 3 1
4GR → 3GR 5 5 5 6 4 2 3 3 3 3 1
3GR → 2GR 5 556423 33 1
2GR → 1GR 5 5 5 6 4 2 3 3 3 1
Revision: 2010 May2011 QX56

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]
C
EF
G H
I
J
K L
M A
B
TM
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

TM-184
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
CONTROL VALVE & TCM
9. Remove bolts and clip (1) from the control valve & TCM.
*: Reamer bolt
10. Remove the control valve & TCM from transmission case.
CAUTION:
When removing, be careful wi th the manual valve (1) notch
and manual plate (2) height. Remove it vertically.
11. Remove joint connector (1) from the control valve & TCM using a flat-bladed screwdriver (A).
12. Disconnect TCM connector (A). CAUTION:
Be careful not to damage connector.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
 Be careful not to damage connector when installing any connector.
 Never reuse joint connector.
 Apply ATF to O-ring of joint connector.
 Never reuse drain plug and drain plug gasket. In addition, install new drain plug and drain plug gas-
ket after adjustment of A/T fluid filling.
 Refer to the following when installing the control valve & TCM to transmission case.
: 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
JPDIA1105ZZ
JPDIA0012ZZ
JSDIA1718ZZ
JSDIA1813ZZ
Revision: 2010 May2011 QX56

CONTROL VALVE & TCMTM-185
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
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-206
< UNIT REMOVAL AND INSTALLATION >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
8. Remove exhaust front tube (RH and LH) and main muffler. Refer to
EX-5, "Exploded View".
9. Separate propeller shaft assembly. Refer to DLN-144, "
Removal and Installation".
NOTE:
Cap or plug opening to prevent fluid from spilling.
10. Remove front under cover with a power tool. Refer to EXT-25, "
Removal and Installation".
11. Remove protector A and B. Refer to SCS-32, "
FRONT TUBE ASSEMBLY : Exploded View".
12. Remove front suspension rear cross member.
13. Remove crankshaft position sensor (POS) from A/T assembly. Refer to EM-106, "
Exploded View".
CAUTION:
 Never subject it to impact by dropping or hitting it.
 Never disassemble.
 Never allow metal filings, etc. to ge t on the sensor's front edge magnetic area.
 Never place in an area affected by magnetism.
14. Remove rear plate cover. Refer to EM-54, "
Exploded View".
15. Turn crankshaft, and remove the four tight ening bolts for drive plate and torque converter.
CAUTION:
When turning the crankshaft, turn it clockw ise as viewed from the front of the engine.
16. Remove A/T fluid cooler tube A and D. Refer to TM-202, "
Exploded View".
NOTE:
Cap or plug openings to prevent fluid from spilling.
17. Remove bolts fixing A/T assembly to engine with a power tool.
18. Disconnect connector from A/T assembly.
19. Remove harness and brackets from A/T assembly.
20. Remove A/T assembly from the vehicle. CAUTION:
 Secure torque converter to prevent it from dropping.
 Secure A/T assembly to a transmission jack.
21. Remove air breather hose and bracket. Refer to TM-199, "
2WD
: Exploded View".
22. Remove manual lever from A/T assembly. Refer to TM-178,
"Exploded View".
INSTALLATION
Note the following, and Install in the reverse order of removal.
 Check fitting of dowel pin ( ).
ATA0025D
JSDIA1597ZZ
Revision: 2010 May2011 QX56

TRANSMISSION ASSEMBLYTM-209
< UNIT REMOVAL AND INSTALLATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
12. Remove crankshaft position sensor (POS) from A/T assembly. Refer to EM-106, "Exploded View".
CAUTION:
 Never subject it to impact by dropping or hitting it.
 Never disassemble.
 Never allow metal filings, etc. to get on the sensor's front edge magnetic area.
 Never place in an area affected by magnetism.
13. Remove rear plate cover. Refer to EM-54, "
Exploded View".
14. Turn crankshaft, and remove the four tightening bolts for drive plate and torque converter. CAUTION:
When turning the crankshaft, turn it clock wise as viewed from the front of the engine.
15. Remove A/T fluid cooler tube A and D. Refer to TM-202, "
Exploded View".
NOTE:
Cap or plug openings to prevent fluid from spilling.
16. Support transfer assembly with a transmission jack.
17. Remove bolts fixing A/T assembly to engine with a power tool.
18. Disconnect connectors from A/T assembly and transfer assembly.
19. Remove harness and brackets from A/T assembly and transfer assembly.
20. Remove A/T assembly with transfer assembly from the vehicle. CAUTION:
 Secure torque converter to prevent it from dropping.
 Secure A/T assembly to a transmission jack.
21. Remove air breather hoses and bracket. Refer to TM-200, "
4WD
: Exploded View" (for A/T) and DLN-121, "Removal and Installa-
tion" (for transfer).
22. Remove manual lever from A/T assembly. Refer to TM-178,
"Exploded View".
23. Remove transfer assembly from A/T assembly with power tool. Refer to DLN-121, "
Removal and Installation".
NOTE:
Cap or plug opening to prevent fluid from spilling.
INSTALLATION
Note the following, and Install in the reverse order of removal.
 Check fitting of dowel pin ( ).
 When installing A/T assembly to the engine, be sure to check dimension “A” to ensure it is within the reference value limit.
SCIA2203E
JSDIA1597ZZ
B: Scale
C : Straightedge
Dimension “A” : Refer to TM-297, "Torque Convert-
er".
JPDIA0042ZZ
Revision: 2010 May2011 QX56