INFINITI QX56 2007 Factory Service Manual

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-201
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1. Remove oil pan. Refer to AT-210, "Control Valve with TCM and A/T Fluid Temperature Sensor 2".
2. Check A/T fluid condition. Refer to AT-51, "
Inspections Before
Trouble Diagnosis".
OK or NG
OK >> GO TO 6.
NG >> GO TO 9.
6.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-60,
"Symptom Chart" (Symptom No.53).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK SYMPTOM
Check again. Refer to AT-59, "
Cruise Test - Part 3".
OK or NG
OK >>INSPECTION END
NG >> GO TO 8.
8.PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT-82, "
TCM Input/Output Signal Reference
Va l u e".
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
9.DETECT MALFUNCTIONING ITEM
• Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-60,
"Symptom Chart" (Symptom No.53).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
SCIA5199E

AT-202
< SERVICE INFORMATION >
A/T SHIFT LOCK SYSTEM
A/T SHIFT LOCK SYSTEM
DescriptionINFOID:0000000003532469
• The electrical key interlock mechanism also operates as a shift lock:
With the ignition switch turned to ON, the selector lever cannot be shifted from “P” (parking) to any other
position unless the brake pedal is depressed.
With the key removed, the selector lever cannot be shifted from “P” to any other position.
The key cannot be removed unless the selector lever is placed in “P”.
• The shift lock and key interlock mechanisms are controlled by the ON-OFF operation of the shift lock sole-
noid and by the operation of the rotator and slider located inside the key cylinder, respectively.
Shift Lock System Electrical Parts LocationINFOID:0000000003532470
LCIA0326E

A/T SHIFT LOCK SYSTEM
AT-203
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Wiring Diagram - AT - SHIFTINFOID:0000000003532471
BCWA0502E

AT-204
< SERVICE INFORMATION >
A/T SHIFT LOCK SYSTEM
Shift Lock Control Unit Reference Value
INFOID:0000000003532472
SHIFT LOCK HARNESS CONNECTOR TERMINALS LAYOUT
SHIFT LOCK CONTROL UNIT INSPECTION TABLE
Data are reference values.
NOTE:
Confirm that the pointer swings only momentarily because the output time is so short. If the inspection is done with an oscilloscope, it
should be observed that the power source voltage lasts for 3.5 to 10 ms.
Component InspectionINFOID:0000000003532473
SHIFT LOCK SOLENOID
WCIA0550E
TER-
MINAL
NO.WIRE
COLORITEM CONDITIONVOLTAGE
(Approx.)
1Y/RPower sourceIgnition switch: “ON” Battery voltage
Ignition switch: “OFF” Battery voltage
2L/R Detention switch (for
key)When selector lever is not in "P" position with key inserted. Battery voltage
Except the above 0V
3GRDetention switch (for
shift)When selector lever is not in "P" position Battery voltage
Except the above 0V
4 R/G Stop lamp switchWhen brake pedal is depressed Battery voltage
When brake pedal is released 0V
5 W/R Vehicle speed signal — —
6 G/R Ignition signalIgnition switch: “OFF” 0V
Ignition switch: “ON” Battery voltage
7 R/W Shift lock solenoidWhen brake pedal is depressed with ignition switch "ON". 0V
When brake pedal is depressed. Battery voltage
8 B Ground Always 0V
9 G/W Key lock solenoidWhen the selector lever is set to a position other than the “P” po-
sition, and the key switch is turned from “ON” to “OFF”Battery voltage for ap-
prox. 0.1 sec. (Note)
Except the above 0V
10 W/G Key unlock solenoidWhen ignition switch is not in "ON” position with key inserted.Battery voltage for ap-
prox. 0.1 sec. (Note)
Except the above 0V

A/T SHIFT LOCK SYSTEM
AT-205
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• Check operation by applying battery voltage to A/T device terminal
9 and ground to terminal 10.
CAUTION:
Be sure to apply the voltage of the correct polarity to the
respective terminals. Otherwise, the part may be damaged.
DETENTION SWITCH
For key:
• Check continuity between terminals of the A/T device.
DETENTION SWITCH
For shift:
• Check continuity between terminals of the A/T device.
KEY LOCK SOLENOID
Key lock
• Check operation by applying battery voltage to key switch and key
lock solenoid terminal 1 and ground to terminal 2.
CAUTION:
Be careful not to cause burnout of the harness.
Key unlock
LCIA0328E
Condition Terminal No. Continuity
When selector lever is “P” position.
5 - 6No
When selector lever is not “P” position. Yes
LIIA1599E
Condition Terminal No. Continuity
When selector lever is “P” position.
3 - 4No
When selector lever is not “P” position. Yes
WCIA0401E
WCIA0240E

AT-206
< SERVICE INFORMATION >
A/T SHIFT LOCK SYSTEM
• Check operation by applying battery voltage to key switch and key
lock solenoid terminal 2 and ground to terminal 1.
CAUTION:
Be careful not to cause burnout of the harness.
KEY SWITCH
• Check continuity between terminals of the key switch and key lock
solenoid.
STOP LAMP SWITCH
• Check continuity between terminals of the stop lamp switch con-
nector.
Check stop lamp switch after adjusting brake pedal.
WCIA0241E
Condition Terminal No. Continuity
Key inserted
3 - 4Ye s
Key withdrawn No
SCIA5662E
Condition Terminal No. Continuity
When brake pedal is depressed
3 - 4Ye s
When brake pedal is released No
WCIA0559E

SHIFT CONTROL SYSTEM
AT-207
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SHIFT CONTROL SYSTEM
Control Device Removal and InstallationINFOID:0000000003532474
REMOVAL
1. Remove negative battery terminal. Refer to SC-4.
2. Remove A/T finisher. Refer to IP-10, "
Removal and Installation".
3. Disconnect selector control cable.
4. Disconnect A/T device harness connector.
5. Remove control device assembly.
INSTALLATION
Installation is in reverse order of removal. Be careful of the following:
• After installation is completed, adjust and check A/T position.
1. Select lever knob 2. A/T console finisher 3. Control device assembly
4. Position lamp 5. A/T selector control cable 6. Lock plate
LCIA0348E

AT-208
< SERVICE INFORMATION >
SHIFT CONTROL SYSTEM
Adjustment of A/T Position
INFOID:0000000003532475
1. Loosen nut of control cable.
2. Place PNP switch and selector lever in “P” position.
3. After pushing the control cable in the direction shown with a
force of 9.8 N·m (1kg-m, 2.2 lb-ft), release it. This is in the natu-
ral state, tighten control cable nut to specifications.
Checking of A/T PositionINFOID:0000000003532476
1. Place selector lever in “P” position, and turn ignition switch ON
(engine stop).
2. Make sure selector lever can be shifted to other than “P” position
when brake pedal is depressed. Also make sure selector lever
can be shifted from “P” position only when brake pedal is
depressed.
3. Move the selector lever and check for excessive effort, sticking,
noise or rattle.
4. Confirm the selector lever stops at each position with the feel of
engagement when it is moved through all the positions. Check
whether or not the actual position the selector lever is in
matches the position shown by the shift position indicator and
the transmission body.
5. The method of operating the lever to individual positions correctly should be as shown.
6. Confirm the back-up lamps illuminate only when lever is placed in the “R” position. Confirm the back-up
lamps does not illuminate when selector lever is pushed against “R” position in the “P” or “N” position.
7. Confirm the engine can only be started with the selector lever in the “P” and “N” positions.
8. Make sure transmission is locked completely in “P” position.Control cable nut : 14.5 N·m (1.5 kg-m, 11 ft-lb)
LCIA0345E
LCIA0325E

ON-VEHICLE SERVICE
AT-209
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ON-VEHICLE SERVICE
Oil PanINFOID:0000000003532477
REMOVAL AND INSTALLATION
Removal
1. Drain A/T fluid. Refer to AT-13, "Changing Automatic Transmission Fluid (ATF)".
2. Remove oil pan clips (1).
3. Remove oil pan (2).
4. Remove oil pan gasket.
• : Front
• : Oil pan bolts
• Drain plug (3)
5. Check foreign materials in oil pan to help determine cause 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 varnish build up. Varnish can cause valves, servo, and
clutches to stick and can inhibit pump pressure.
CAUTION:
If friction material is detected, flush the transmission cooler after repair. Refer to AT-15, "
A/T Fluid
Cooler Cleaning".
6. Remove magnets from oil pan.
Installation
1. Install the oil pan magnets as shown.
AWDIA0023ZZ
SCIA5200E
SCIA5200E

AT-210
< SERVICE INFORMATION >
ON-VEHICLE SERVICE
2. Install the oil pan (2) and new oil pan gasket.
• Oil pan clips (1)
• Drain plug (3)
• : Front
• : Oil pan bolts
CAUTION:
• Do not reuse the oil pan gasket.
• Completely remove all moisture, oil and old gasket from
the oil pan gasket mating surfaces and holes.
• Always replace the oil pan bolts as they are self-sealing.
• Be sure the oil pan drain plug hole is located to the rear of
the transmission assembly.
• Partially install the oil pan bolts in a criss-cross pattern to prevent dislocation of the gasket.
• Be careful not to pinch harnesses.
3. Tighten new oil pan bolts in numerical order as shown.
4. Install drain plug in oil pan with new gasket.
CAUTION:
Do not reuse the drain plug gasket.
5. Refill the transmission assembly with fluid. Refer to AT-13, "
Changing Automatic Transmission Fluid
(ATF)".
Control Valve with TCM and A/T Fluid Temperature Sensor 2INFOID:0000000003532478
COMPONENTS
AWDIA0023ZZ
Oil pan bolts : 7.9 N·m (0.81 kg-m, 70 in-lb)
SCIA4113E
Drain plug : 34 N·m (3.5 kg-m, 25 ft-lb)