2011 INFINITI QX56 check engine

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

P2731 PRESSURE CONTROL SOLENOID FTM-149
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
P2731 PRESSURE CONTROL SOLENOID F
DTC LogicINFOID:0000000006226871
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 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
“P2731” detected?
YES >> Go to TM-149, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226872
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
P2731 Pressure Control Solenoid F The 2346 brake solenoid valve
monitor value is 0.4 A or less
when the 2346 brake solenoid
valve command value is more
than 0.75 A. Harness or connectors
(Solenoid valve circuit is
open or shorted.)
 2346 brake solenoid valve
BATTERY VOLT : 9 V or more
MANU MODE SW : ON
GEAR : 2nd
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

TM-156
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
SHIFT POSITION INDICATOR CIRCUIT
SHIFT POSITION INDICATOR CIRCUIT
DescriptionINFOID:0000000006226879
TCM transmits a shift position signal to the combination meter via CAN communication line. While the vehicle
is running, the combination meter displays a shift position in the information display, according to this signal.
Refer to
MWI-9, "
METER SYSTEM : System Diagram".
Component Function CheckINFOID:0000000006226880
1.CHECK A/T INDICATOR
CAUTION:
Always drive vehicle at a safe speed.
1. Start the engine.
2. Check the actual selector lever position (“P”, “R”, “N” and “D”) and the indication of the shift position indi-
cator mutually coincide.
3. Drive vehicle in the manual mode, and then check that the actual gear position and the indication of the
shift position indicator mutually coincide when the sele ctor lever is shifted to “UP (+ side)” or “DOWN (−
side)” side (1GR ⇔ 7GR).
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to TM-156, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006226881
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start the engine.
2. Select “SLCT LVR POSI” in “Data Monitor” in “TRANSMISSION”.
3. Check the actual selector lever position (“P”, “R”, “N” and “D”) and the indication of the “SLCT LVR POSI”
mutually coincide. Refer to TM-68, "
Reference Value".
4. Drive vehicle in the manual mode, and then check that the actual gear position and the indication of the
“SLCT LVR POSI” mutually coincide when the selector lever is shifted to the “UP (+ side)” or “DOWN (−
side)” side (1GR ⇔ 7GR). Refer to TM-68, "
Reference Value".
Is the inspection result normal?
YES >> INSPECTION END
NO-1 [The actual gear position does not change, or sh ifting into the manual mode is not possible (no gear
shifting in the manual mode possible). Or the shift position indicator is not indicated.]>>Check manual
mode switch. Refer to TM-146, "
Component Inspection (Manual Mode Switch)".
 Check A/T main system (Fai l-safe function actuated).
- Perform “Self Diagnostic Results” in “TRANSMISSION”. Refer to TM-78, "
DTC Index".
NO-2 (The actual gear position changes, but the shift pos ition indicator is not indicated.)>>Perform “Self
Diagnostic Results” in “TRANSMISSION”. Refer to TM-78, "
DTC Index".
NO-3 (The actual gear position and the indication on t he shift position indicator do not coincide.)>>Perform
“Self Diagnostic Results” in “TRANSMISSION”. Refer to TM-78, "
DTC Index".
NO-4 (Only a specific position or positions is/are not indicated on the shift position indicator.)>>Check the
combination meter. Refer to MWI-35, "
Reference Value".
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-207
< UNIT REMOVAL AND INSTALLATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
 When installing A/T assembly to the engine, be sure to check dimension “A” to ensure it is within the reference value limit.
 When installing A/T assembly to the engine, attach the fixing bolts in accordance with the following standard.
*: Tightening the bolt with bracket (and washer). Refer to TM-199, "2WD : Exploded View".
 Align the positions of tightening bolts for drive plate with those of the torque converter, and temporarily
tighten the bolts. Then, tighten the bolts with the specified torque.
CAUTION:
 When turning crankshaft, turn it clockwise as viewed from the front of the engine.
 When tightening the tightening bolts for the torq ue converter after fixing the crankshaft pulley
bolts, be sure to confirm the tightening torque of the crankshaft pulley mounting bolts. Refer to
EM-62, "
Removal and Installation".
 Rotate crankshaft several turns and check to be sure that A/T rotates freely without binding after
converter is installed to drive plate.
2WD : Inspection and AdjustmentINFOID:0000000006233265
INSPECTION AFTER INSTALLATION
 Check A/T fluid leakage. Refer to TM-175, "Inspection".
 Check A/T position after adjusting A/T position. Refer to TM-101, "
Inspection".
ADJUSTMENT AFTER INSTALLATION
 Adjust A/T fluid level. Refer to TM-95, "Adjustment".
 Adjust A/T position. Refer to TM-101, "
Adjustment".
 Perform decel G sensor calibration when replacing A/T assembly. Refer to TM-91, "
Special Repair Require-
ment".
4WD
B: Scale
C : Straightedge
Dimension “A” : Refer to TM-297, "Torque Convert-
er".
JPDIA0042ZZ
Bolt symbol A
Insertion direction A/T assembly to engine
Number of bolts 9
Bolt length “L”
mm (in) 70 (2.76)
Tightening torque
N·m (kg-m, ft-lb) 113 (12, 83)
JSDIA1598ZZ
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

TM-210
< UNIT REMOVAL AND INSTALLATION >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
 When installing A/T assembly to the engine, attach the fixing bolts
in accordance with the following standard.
*: Tightening the bolt with bracket (and washer). Refer to TM-200, "4WD : Exploded View".
 Align the positions of tightening bolts for drive plate with those of the torque converter, and temporarily
tighten the bolts. Then, tighten the bolts with the specified torque.
CAUTION:
 When turning crankshaft, turn it clockwi se as viewed from the front of the engine.
 When tightening the tightening bolts for the torque converter after fixing the crankshaft pulley
bolts, be sure to confirm the tightening torque of the crankshaft pulley mounting bolts. Refer to
EM-62, "
Removal and Installation".
 Rotate crankshaft several turns and check to be sure that A/T rotates freely without binding after
converter is installed to drive plate.
4WD : Inspection and AdjustmentINFOID:0000000006226912
INSPECTION AFTER INSTALLATION
 Check A/T fluid leakage.
 Check A/T position after adjusting A/T position. Refer to TM-101, "
Inspection".
ADJUSTMENT AFTER INSTALLATION
 Adjust A/T fluid level. Refer to TM-95, "Adjustment".
 Adjust A/T position. Refer to TM-101, "
Inspection".
 Perform decel G sensor calibration w hen replacing A/T assembly. Refer to TM-91, "
Special Repair Require-
ment".
Bolt symbol A
Insertion direction A/T assembly to engine
Number of bolts 9
Bolt length “L”
mm (in) 70 (2.76)
Tightening torque
N·m (kg-m, ft-lb) 113 (12, 83)
JSDIA1598ZZ
Revision: 2010 May2011 QX56