INFINITI QX56 2009 Factory Service Manual

ROAD TESTTM-193
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NO >> Enter a check mark at “A/T Does Not Hold Lock-up Condition” on the diagnostics worksheet, then
continue the road test.
8.CHECK LOCK-UP RELEASE
Check lock-up cancellation by depressi ng brake pedal lightly to decelerate.
With CONSULT-III
Select “TCC SOLENOID 0.00A” with the “MAIN SIGNAL” mode for A/T.
Does lock-up cancel?
YES >> GO TO 9.
NO >> Enter a check mark at “Lock-up Is Not Rel eased” on the diagnostics worksheet, then continue the
road test.
9.CHECK SHIFT-DOWN D5 → D4
Decelerate by pressing lightly on the brake pedal. With CONSULT-III
Read the gear position and engine speed.
When the A/T shift-down D5
→ D4, does the engine speed drop smoothly back to idle?
YES >> 1. Stop the vehicle. 2. Go to Cruise test - Part 2 (Refer to AT 58).
NO >> Enter a check mark at “Engine Speed Does Not Return to Idle” on the diagnostics worksheet, then continue the road test. Go to Cruise test - Part 2 (Refer to AT 58).
Cruise Test - Part 2INFOID:0000000003772030
1.CHECK STARTING FROM D1
1. Move selector lever the “D” position.
2. Accelerate at half throttle. With CONSULT-III
Read the gear position.
Does it start from D1?
YES >> GO TO 2.
NO >> Enter a check mark at “Vehicle Cannot Be St arted From D1” on the diagnostics worksheet, then
continue the road test.
2.CHECK SHIFT-UP D1 → D2
Press the accelerator pedal down all the way and inspect whether or not the transmission shifts up (D1 → D2)
at the correct speed.
 Refer to TM-290, "Vehicle Speed at Which Gear Shifting Occurs"
.
With CONSULT-III
Read the gear position, thrott le position and vehicle speed.
Does the A/T shift-up D1
→ D2 at the correct speed?
YES >> GO TO 3.
NO >> Enter a check mark at “Vehicle Does Not Shift: D1 → D2” on the diagnostics worksheet, then con-
tinue the road test.
3.CHECK SHIFT-UP D2 → D3
Press the accelerator pedal down all the way and inspect whether or not the transmission shifts up (D2 → D3)
at the correct speed.
 Refer to TM-290, "Vehicle Speed at Which Gear Shifting Occurs"
.
With CONSULT-III
Read the gear position, thrott le position and vehicle speed.
Does the A/T shift-up D2
→ D3 at the correct speed?
YES >> GO TO 4.
NO >> Enter a check mark at “Vehicle Does Not Shift: D2 → D3” on the diagnostics worksheet, then con-
tinue the road test.
4.CHECK SHIFT-UP D3 → D4 AND ENGINE BRAKE
Revision: December 20092009 QX56

TM-194
< ON-VEHICLE MAINTENANCE >
ROAD TEST
When the transmission changes speed D3 → D4, return the accelerator pedal.
Does the A/T shift-up D3
→ D4 and apply the engine brake?
YES >> 1. Stop the vehicle. 2. See TM-194, "Cruise Test - Part 3"
.
NO >> Enter a check mark at “Vehicle Does Not Shift: D3 → D4” on the diagnostics worksheet, then con-
tinue the road test.
Cruise Test - Part 3INFOID:0000000003772031
1.CHECK SHIFT-DOWN
During D
5 driving, move gear selector from D → 4 → 3 → 2 → 1.
With CONSULT-III
Read the gear position.
Is downshifting correctly performed?
YES >> GO TO 2.
NO >> Enter a check mark at “Vehicle does not shift” at the corresponding position (5th → 4th, 4th → 3rd,
3rd → 2nd, 2nd → 1st) on the diagnostics worksheet, then continue the road test.
2.CHECK ENGINE BRAKE
Does engine braking effectively reduce speed in 1
1 position?
YES >> 1. Stop the vehicle. 2. Carry out the self-diagnostics. Refer to TM-32, "CONSULT-III Function (TRANSMISSION)"
.
NO >> Enter a check mark at “Vehicle Does Not Decelerate By Engine Brake” on the diagnostics work- sheet, then continue trouble diagnosis.
Vehicle Speed When Shifting GearsINFOID:0000000003772032
Refer to TM-290, "Vehicle Speed at Which Gear Shifting Occurs".
Vehicle Speed When Performing a nd Releasing Complete Lock-upINFOID:0000000003772033
Refer to TM-291, "Vehicle Speed at Which Lock-up Occurs/Releases".
Revision: December 20092009 QX56

A/T POSITIONTM-195
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A/T POSITION
Adjustment of A/T PositionINFOID:0000000004187477
1. Loosen nut of control cable.
2. Place the manual lever and selector lever in “P” position.
3. Push the control cable in the direction shown with a force of 9.8 N (1kg, 2.2 lb), and release it. This is in the natural state, tighten
control cable nut to specifications.
Checking of A/T PositionINFOID:0000000004187478
With the selector lever in the “P” position, turn t he ignition switch to the ON position with the engine OFF.
Confirm that the following conditions apply.
 The selector lever can be shifted from the “P ” position only when the brake pedal is depressed.
 The selector lever stops at each position with the f eel of engagement when it is moved through all the posi-
tions.
 There is no excessive effort, sticking, noise or rattle.
 The actual position of the selector lever matches the position shown by the shift position indicator and the A/
T body.
 The back-up lamps illuminate only when the selector lever is placed in the “R” position.
 The back-up lamps do not illuminate when the selector lever is pushed against the “R” position when in the
“P” or “N” position.
 The engine can only be started with the sele ctor lever in the “P” and “N” positions.
 The A/T is locked completely when in the “P” position. Control cable nut : 14.5 N·m (1.5 kg-m, 11 ft-lb)
SCIA6532E
Revision: December 20092009 QX56

TM-196
< ON-VEHICLE REPAIR >
SHIFT CONTROL SYSTEM
ON-VEHICLE REPAIR
SHIFT CONTROL SYSTEM
A/T Shift Selector Removal and InstallationINFOID:0000000004187479
REMOVAL
1. Remove A/T finisher. Refer to IP-19, "Removal and Installation".
2. Disconnect A/T shift selector control cable.
3. Disconnect A/T shift selector harness connector.
4. Remove A/T shift selector assembly.
INSTALLATION
Installation is in reverse order of removal. Be careful of the following:
 After installation is completed, adjust and check A/T position. Refer to TM-195, "Adjustment of A/T Position"
,
TM-195, "Checking of A/T Position"
.
1. Select lever handle 2. A/T console finisher 3. A/T shift selector
4. Position lamp 5. A/T shift selector control cable 6. Lock plate
LCIA0348E
Revision: December 20092009 QX56

AIR BREATHER HOSETM-197
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AIR BREATHER HOSE
2WD
2WD : Removal and InstallationINFOID:0000000005892370
CAUTION:
 Install air breather hose with paint mark at upper side.
 When installing the air breather hose, do not crush or block by folding or bending the hose.
 When inserting the hose to the tran smission tube, be sure to insert it fully until its end reaches the
tube bend portion.
 Make sure clip is securely installed to bracket.
4WD
4WD : Removal and InstallationINFOID:0000000005892369
REMOVAL
A. Set air breather hose with
paint mark at upper side B. Clip (set securely to bracket)
AWDIA0554GB
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TM-198
< ON-VEHICLE REPAIR >
AIR BREATHER HOSE
INSTALLATION
CAUTION:
Make sure there are no pinched or restricted areas on each air breather hose caused by folding or
bending when installing it.
1. Install each air breather hose into the breather tube (4). Set
each air breather hose with paint mark facing upward.
 A/T breather hose (1)
 Transfer breather hose (2)
 Actuator/transfer motor breather hose (3)
 Paint marks (A)
2. Install actuator/transfer motor air breather hose (1) and transfer air breather hose (2) on clip (A) with the paint mark (B) facing
upward.
 :Front
1. Breather tube 2. Clip A 3. Clip B
4. Clip C 5. Clip D 6. Actuator
7. Air breather hose clamp 8. Clip E 9. Transfer motor
10. Breather tube (transfer) Vehicle front
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AIR BREATHER HOSETM-199
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3. Install clip (B) on actuator/transfer motor air breather hose (1) and transfer air breather hose (2) with the paint mark (A)
matched.
 :Front
4. Install actuator/transfer motor air breather hose (1) and transfer air breather hose (2) on clip (B) and clip (C) with the paint mark
(A) and (D) facing upward.
 :Front
5. Install the actuator air breather hose into the actuator (case con-
nector) until the hose end reaches the base of the tube. Set
actuator air breather hose with paint mark facing leftward.
6. Install clip (B) on transfer motor air breather hose (2) and trans- fer air breather hose (1) with the paint mark (A) matched.
 :Front
7. Install the transfer air breather hose into the breather tube (transfer, metal connector) until the hose end reaches the base
of the tube. Set transfer air breather hose with paint mark facing
upwards.
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TM-200
< ON-VEHICLE REPAIR >
AIR BREATHER HOSE
8. Install the transfer motor air breather hose into the transfermotor (case connector) until the hose end reaches the end of
the curved section. Set transfer motor air breather hose with
paint mark facing leftward.
SDIA3194E
Revision: December 20092009 QX56

OIL PANTM-201
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OIL PAN
Oil PanINFOID:0000000005880214
REMOVAL AND INSTALLATION
Removal
1. Drain A/T fluid. Refer to TM-181, "Changing the A/T Fluid (ATF)".
2. Remove oil pan clips (1).
3. Remove oil pan (2).
4. Remove oil pan gasket.  : Vehicle front
 : Oil pan bolts
 Drain plug (3)
5. Check foreign materials in oil pan to help determine c ause of malfunction. If the A/T fluid is very dark, has
some burned smell, or contains foreign particles, friction material (clutches, band) may need replacement.
A tacky film that will not wipe clean indicates varnis h build up. Varnish can cause valves, servo, and
clutches to stick and can inhibit pump pressure.
CAUTION:
If friction material is detected, flush th e transmission cooler after repair. Refer to TM-183, "A/T
Fluid Cooler Cleaning".
6. Remove magnets from oil pan.
Installation
1. Install the oil pan magnets as shown.
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TM-202
< ON-VEHICLE REPAIR >
OIL PAN
2. Install the oil pan and new oil pan gasket. : Vehicle front
 : Oil pan bolts
 Clips (1)
 Drain plug (3)
CAUTION:
 Be sure the oil pan drain plug hole is located to the rear ofthe transmission assembly.
 Before installing oil pan bolts, remove any traces of old sealant from the sealing su rfaces and threaded holes.
 Do not reuse the oil pan gasket.
 Always replace the oil pan bolts as they are self-sealing.
 Partially install the oil pan bolts in a criss- cross pattern to prevent dislocation of the gasket.
3. Install new oil pan bolts and clips tighten in numerical order as shown.
4. Install drain plug with new gasket to oil pan and tighten to speci- fication.
CAUTION:
Do not reuse the drain plug gasket.
5. Refill the A/T with fluid and check for fluid leakage. Refer to TM-
179, "Checking the A/T Fluid (ATF)".
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Oil pan bolts : 7.9 N·m (0.81 kg-m, 70 in-lb)
Drain plug : 34 N·m (3.5 kg-m, 25 ft-lb)
SCIA4113E
Revision: December 20092009 QX56