2007 INFINITI QX56 brake

AT-184
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
Do the self-diagnostic results indicate ATF pressure switch 1, ATF pressure switch 3, front brake solenoid
valve, input clutch solenoid valve, accelerator pedal position sensor, vehicle speed sensor A/T (revolution sen-
sor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT-150, AT- 1 5 2' AT-130, AT-134, AT- 11 7' AT-105' AT-
124.
NO >> GO TO 3.
3.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-13, "
Checking Automatic Trans-
mission Fluid (ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT-51,
"Inspections Before Trouble Diagnosis".
OK or NG
OK >> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.
5.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
- Power train system. Refer to AT-240, "
Disassembly".
- Transmission case. Refer to AT-240, "
Disassembly".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sensor 2".
SAT638A
SAT494G

AT-186
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
Do the self-diagnostic results indicate ATF pressure switch 1, ATF pressure switch 5, front brake solenoid
valve, direct clutch solenoid valve, accelerator pedal position sensor, turbine revolution sensor, vehicle speed
sensor A/T (revolution sensor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT-150' AT-154, AT-134' AT-138' AT- 11 7' AT-103, AT-
105' AT-124.
NO >> GO TO 3.
3.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-13, "
Checking Automatic Trans-
mission Fluid (ATF)".
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4.CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT-51,
"Inspections Before Trouble Diagnosis".
OK or NG
OK >> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.
5.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2".
2. Disassemble A/T. Refer to AT-240, "
Disassembly".
3. Check the following items:
- Oil pump assembly. Refer to AT-258, "
Oil Pump".
- Power train system. Refer to AT-240, "
Disassembly".
- Transmission case. Refer to AT-240, "
Disassembly".
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sensor 2".
SAT638A
SAT494G

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-191
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
The lock-up condition cannot be cancelled even after releasing the accelerator pedal.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-83, "
CONSULT-II Function (A/T)".
Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, turbine rev-
olution sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to AT- 111' AT-109' AT-103' AT- 9 1.
NO >> GO TO 2.
2.CHECK SYMPTOM
Check again. Refer to AT-55, "
Check at Idle".
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
3.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.
Engine Speed Does Not Return to IdleINFOID:0000000003532463
SYMPTOM:
When a shift-down is performed, the engine speed does not smoothly return to the idling speed.
DIAGNOSTIC PROCEDURE
1.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-13, "
Checking Automatic Trans-
mission Fluid (ATF)".
OK or NG
OK >> GO TO 2.
NG >> Refill ATF.
2.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-83, "
CONSULT-II Function (A/T)".
Do the self-diagnostic results indicate front brake solenoid valve, direct clutch solenoid valve, ATF pressure
switch 1, ATF pressure switch 5, accelerator pedal position sensor, vehicle speed sensor A/T (revolution sen-
sor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT-134' AT-138, AT-150' AT-154' AT- 11 7, AT-105' AT-
124.
NO >> GO TO 3.
3.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-210, "
Control Valve with TCM and A/T Fluid Temperature Sensor 2".
SAT638A

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-199
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
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.17).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK SYMPTOM
Check again. Refer to AT-58, "
Cruise Test - Part 2".
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.17).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
Vehicle Does Not Decelerate By Engine BrakeINFOID:0000000003532468
SYMPTOM:
No engine brake is applied when the gear is shifted from the 22 to 11.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis.
Do the self-diagnosis results indicate PNP switch, ATF pressure switch 5?
YES >> Check the malfunctioning system. Refer to AT- 9 9' AT-154.
NO >> GO TO 2.
2.CHECK 1ST POSITION SWITCH CIRCUIT
With CONSULT-II
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

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

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

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