4WD INFINITI QX56 2011 Factory Service Manual

TM-16
< SYSTEM DESCRIPTION >[7AT: RE7R01B]
STRUCTURE AND OPERATION
STRUCTURE AND OPERATION
TRANSMISSION
TRANSMISSION : Cross-Sectional ViewINFOID:0000000006226762
2WD MODELS
4WD MODELS
1. Low brake 2. Drum support 3. Reverse brake
4. Direct clutch 5. High and low reverse clutch 6. 2nd one-way clutch
7.
*1Rear carrier 8. Mid carrier 9. Input clutch
10.
*2Front sun gear 11 .*3Front carrier 12. Under drive carrier
13. 1st one-way clutch 14. Front brake 15. 2346 brake
16.
*4Input shaft 17. Torque converter 18. Oil pump
19.
*2Under drive sun gear 20.*3Under drive internal gear21.*4Front internal gear
22. Mid sun gear 23.
*1Mid internal gear 24. Rear sun gear
25. Rear internal gear 26. High and low reverse clutch hub 27. Control valve & TCM
28. Parking gear 29. Adapter case 30. Output shaft
*1: 7 and 23 are one unit.
*2: 10 and 19 are one unit.
*3: 11 and 20 are one unit.
*4: 16 and 21 are one unit.
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Revision: 2010 May2011 QX56

P2713 PRESSURE CONTROL SOLENOID DTM-147
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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P2713 PRESSURE CONTROL SOLENOID D
DTC LogicINFOID:0000000006226867
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 “BATTERY VOLT”, “MANU MODE SW”, “GEAR” and “VHCL/S SE-A/T” in “Data Monitor” in
“TRANSMISSION”.
3. Drive the vehicle and maintain the following conditions for 5 seconds or more.
4. Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P2713” detected?
YES >> Go to TM-147, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226868
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-208, "4WD : Exploded View".
NO >> Repair or replace damaged parts.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P2713 Pressure Control Solenoid D The high and low reverse clutch
solenoid valve monitor value is
0.4 A or less when the high and
low reverse clutch solenoid
valve command value is more
than 0.75 A. Harness or connectors
(Solenoid valve circuit is
open or shorted.)
 High and low reverse clutch solenoid valve
BATTERY VOLT : 9 V or more
MANU MODE SW : ON
GEAR : 3rd
VHCL/S SE-A/T : 10 km/h (7 MPH) or more
Revision: 2010 May2011 QX56

TM-148
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P2722 PRESSURE CONTROL SOLENOID E
P2722 PRESSURE CONTROL SOLENOID E
DTC LogicINFOID:0000000006226869
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 “BATTERY VOLT”, “MANU MODE SW”, “G EAR” and “VHCL/S SE-A/T” in “Data Monitor” in
“TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 5 seconds or more.
4. Perform “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P2722” detected?
YES >> Go to TM-148, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226870
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-208, "4WD : Exploded View".
NO >> Repair or replace damaged parts.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P2722 Pressure Control Solenoid E The low brake solenoid valve
monitor value is 0.4 A or less
when the low brake solenoid
valve command value is more
than 0.75 A. Harness or connectors
(Solenoid valve circuit is
open or shorted.)
 Low brake solenoid valve
BATTERY VOLT : 9 V or more
MANU MODE SW : ON
GEAR : 1st
VHCL/S SE-A/T : 10 km/h (7 MPH) or more
Revision: 2010 May2011 QX56

TM-150
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P2807 PRESSURE CO
NTROL SOLENOID G
P2807 PRESSURE CONTROL SOLENOID G
DTC LogicINFOID:0000000006226873
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 “BATTERY VOLT”, “MANU MODE SW”, “G EAR” and “VHCL/S SE-A/T” in “Data Monitor” in
“TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 5 seconds or more.
4. Perform “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P2807” detected?
YES >> Go to TM-150, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226874
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-208, "4WD : Exploded View".
NO >> Repair or replace damaged parts.
DTC Trouble diagnosis name DTC is detected is... Possible cause
P2807 Pressure Control Solenoid G The direct clutch solenoid valve
monitor value is 0.4 A or less
when the direct clutch solenoid
valve command value is more
than 0.75 A. Harness or connectors
(Solenoid valve circuit is
open or shorted.)
 Direct clutch solenoid valve
BATTERY VOLT : 9 V or more
MANU MODE SW : ON
GEAR : 1st
VHCL/S SE-A/T : 10 km/h (7 MPH) or more
Revision: 2010 May2011 QX56

TOW MODE SYSTEMTM-153
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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TOW MODE SYSTEM
Component Function CheckINFOID:0000000006226876
1.CHECK TOW MODE INDICATOR LAMP FUNCTION
1. Turn ignition switch ON.
2. Check that tow mode indicator lamp turn s ON/OFF when tow mode switch is operated.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to TM-153, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006226877
NOTE:
Tow mode switch is integrated in to SNOW MODE/T OW MODE/VDC OFF switch assembly (2WD models) or
4WD switch assembly (4WD models).
1.CHECK DTC OF TCM
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “Self-Diagnostic Results” in “TRANSMISSION”.
Is any DTC detected?
YES >> Check DTC detect ed item. Refer to TM-78, "DTC Index".
NO >> GO TO 2.
2.CHECK DTC OF COMBINATION METER
With CONSULT-III
Perform “Self-Diagnostic Re sults” in “METER/M&A”.
Is any DTC detected?
YES >> Check DTC detect ed item. Refer to MWI-43, "DTC Index".
NO >> GO TO 3.
3.CHECK COMBINATION METER
With CONSULT-III
1. Select “TOW MODE IND” in “Data Monitor” in “METER/M&A”.
2. Check that “TOW MODE IND” turns ON/OFF when tow mode switch is operated.
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Exploded View".
NO >> GO TO 4.
4.CHECK TOW MODE SWITCH SIGNAL
With CONSULT-III
1. Select “TOW MODE SW” in “Data Monitor” in “TRANSMISSION”.
2. Check that “TOW MODE SW” turns ON /OFF when tow mode switch is operated.
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Exploded View".
NO >> GO TO 5.
5.CHECK TOW MODE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect SNOW MODE/TOW MODE/VDC OFF switch assembly (2WD models) or 4WD switch assem-
bly connector (4WD models).
3. Turn ignition switch ON.
4. Check voltage between SNOW MODE/TOW MODE/VDC OFF switch assembly (2WD models) or 4WD
switch assembly connector (4WD models) vehicle side harness connector terminals.
Revision: 2010 May2011 QX56

TM-154
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
TOW MODE SYSTEM
*1: 2WD models
*2: 4WD models
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 9.
6.CHECK TOW MODE SWITCH
Check tow mode switch. Refer to TM-155, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace damaged parts.
7.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair or replace damaged parts.
8.CHECK TOW MODE SYSTEM
1. Replace the control valve & TCM. Refer to TM-182, "
Exploded View".
2. Reinstall any parts removed.
3. Check tow mode system. Refer to TM-153, "
Component Function Check".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace combination meter. Refer to TM-182, "
Exploded View".
9.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between SNOW MODE/TOW MODE/VDC OFF switch as sembly (2WD models) or 4WD
switch assembly connector (4WD models) vehicle side harness connector terminal and ground.
*1: 2WD models
*2: 4WD models
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair or replace damaged parts.
10.CHECK HARNESS BETWEEN SNOW MODE/TOW MODE/VDC OFF SWITCH ASSEMBLY (2WD MOD-
ELS) OR 4WD SWITCH ASSEMBLY (4WD MODELS) AND COMBINATION METER (PART 1)
1. Disconnect combination meter connector.
2. Check continuity between SNOW MODE/TOW MODE/VDC OFF switch as sembly (2WD models) or 4WD
switch assembly connector (4WD models) vehicl e side harness connector terminal and combination
meter vehicle side harness connector terminal.
SNOW MODE/TOW MODE/VDC OFF sw itch assembly (2WD models) or 4WD switch assembly
(4WD models) Voltage (Approx.)
Connector Te r m i n a l
+–
M54
*1
M147*223 20 Battery voltage
SNOW MODE/TOW MODE/VDC O FF switch assembly (2WD
models) or 4WD switch assembly (4WD models)
GroundContinuity
Connector Terminal
M54
*1
M147*220 Existed
Revision: 2010 May2011 QX56

TOW MODE SYSTEMTM-155
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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*1: 2WD models
*2: 4WD models
Is the inspection result normal?
YES >> GO TO 11.
NO >> Repair or replace damaged parts.
11 .CHECK HARNESS BETWEEN SNOW MODE/TOW MODE/VDC OFF SWITCH ASSEMBLY (2WD MOD-
ELS) OR 4WD SWITCH ASSEMBLY (4WD MODELS) AND COMBINATION METER (PART 2)
Check continuity between SNOW MODE/TOW MODE/V DC OFF switch assembly (2WD models) or 4WD
switch assembly connector (4WD models) vehicle side harness connector terminal and ground.
*1: 2WD models
*2: 4WD models
Is the inspection result normal?
YES >> GO TO 12.
NO >> Repair or replace damaged parts.
12.CHECK COMBINATION METER
1. Reconnect all the connectors.
2. Check combination meter input/output signal. Refer to MWI-35, "
Reference Value".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent Incident".
NO >> Replace combination meter. Refer to MWI-85, "
Exploded View".
Component InspectionINFOID:0000000006226878
NOTE:
Tow mode switch is integrated in to SNOW MODE/T OW MODE/VDC OFF switch assembly (2WD models) or
4WD switch assembly (4WD models).
1.CHECK TOW MODE SWITCH
Check continuity between SNOW MODE/TOW MODE/V DC OFF switch assembly (2WD models) or 4WD
switch assembly (4WD models) connector terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace tow mode switch. Refer to TM-181, "
Removal and Installation".
SNOW MODE/TOW MODE/VDC OFF switch as-
sembly (2WD models) or 4WD switch assembly (4WD models) Combination meter
Continuity
Connector Terminal Connector Terminal M54
*1
M147*223 M34 7 Existed
SNOW MODE/TOW MODE/VDC OF F switch assembly (2WD
models) or 4WD switch assembly (4WD models)
GroundContinuity
Connector Terminal
M54
*1
M147*223 Not existed
SNOW MODE/TOW MODE/VDC OF F switch assembly (2WD
models) or 4WD switch assembly (4WD models) Condition Continuity
Te r m i n a l
23 20 Tow mode switch is depressed Existed
Tow mode switch is released Not existed
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".
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Revision: 2010 May2011 QX56

TOW MODE SWITCHTM-181
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
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TOW MODE SWITCH
Removal and InstallationINFOID:0000000006226898
NOTE:
Tow mode switch is integrated in to SNOW MODE/T OW MODE/VDC OFF switch assembly (2WD models) or
4WD switch assembly (4WD models).
REMOVAL
1. Remove console finisher assembly from center console assembly. Refer to IP-25, "Removal and Installa-
tion".
2. Disconnect SNOW MODE/TOW MODE /VDC OFF switch assembly (2WD models) or 4WD switch
assembly (4WD models) harness connector.
3. Press SNOW MODE/TOW MODE/VDC OFF switch a ssembly (2WD models) or 4WD switch assembly
(4WD models) fixing pawls, and remove SNOW MO DE/TOW MODE/VDC OFF switch assembly (2WD
models) or 4WD switch assembly (4WD models) from console finisher assembly.
INSTALLATION
Install in the reverse order of removal.
Revision: 2010 May2011 QX56

REAR OIL SEALTM-193
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
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2WD : InspectionINFOID:0000000006228062
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".
4WD
4WD : Exploded ViewINFOID:0000000006226902
4WD : Removal and InstallationINFOID:0000000006226903
REMOVAL
1. Remove transfer assembly from A/T assembly. Refer to DLN-137, "Removal and Installation".
2. Remove rear oil seal (1) with a flat-bladed screwdriver (A). CAUTION:
Never scratch adapter case assembly.
INSTALLATION
Note the following, and install in the reverse order of removal.
1. A/T 2. Rear oil seal
Refer to GI-4, "
Components" for symbols in the figure.
JSDIA1726ZZ
JPDIA0038ZZ
Revision: 2010 May2011 QX56