2009 INFINITI QX56 Factory Service Manual

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Page 3833 of 4171

INFINITI QX56 2009 Factory Service Manual
A/T FLUID COOLERTM-185
< ON-VEHICLE MAINTENANCE >
CEF
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8. Insert the tip of an air gun into the end of the cooler outlet hose.
9. Wrap a shop rag around the air gun tip and

Page 3834 of 4171

INFINITI QX56 2009 Factory Service Manual
TM-186
< ON-VEHICLE MAINTENANCE >
STALL TEST
STALL TEST
Inspection and JudgmentINFOID:0000000003772024
A/T FLUID CHECK
Fluid Leakage and Fluid Level Check
Inspect for fluid leakage and check the f

Page 3835 of 4171

INFINITI QX56 2009 Factory Service Manual
STALL TESTTM-187
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4. Engine start, apply foot brake, and place selector lever in “D” position.
5. While holding down the foot brake, gradu

Page 3836 of 4171

INFINITI QX56 2009 Factory Service Manual
TM-188
< ON-VEHICLE MAINTENANCE >
LINE PRESSURE TEST
LINE PRESSURE TEST
Inspection and JudgmentINFOID:0000000003772025
LINE PRESSURE TEST
Line Pressure Test Port
Line Pressure Test Procedure
1. Insp

Page 3837 of 4171

INFINITI QX56 2009 Factory Service Manual
LINE PRESSURE TESTTM-189
< ON-VEHICLE MAINTENANCE >
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5. Start the engine, then measure the line pressure at both idle and the stall speed.
CAUTION:
Keep the brake peda

LINE PRESSURE TESTTM-189
< ON-VEHICLE MAINTENANCE >
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5. Start the engine, then measure the line pressure at both idle and the stall speed.
CAUTION:
Keep the brake pedal pressed all the way down during
measurement.
When measuring the line pressu re at the stall speed, refer
to TM-186, "Inspection and Judgment"
.
6. After the measurements are complete, install the oil pressure detection plug and tighten to the regulation torque below.
CAUTION:
Do not reuse the O-ring.
Line Pressure
Judgement of Line Pressure Test
Oil pressure detection
plug :7.3 N·m (0.74 kg-m, 65 in-lb)SAT493G
Engine speed
Line pressure [kPa (kg/cm
2, psi)]
R position D position
At idle speed 425 - 465 (4.3 - 4.7, 62 - 67) 379 - 428 (3.9 - 4.4, 55 - 62)
At stall speed 1,605 - 1,950 (16.4 - 19.9, 233 - 283) 1,310 - 1,500 (13.4 - 15.3, 190 - 218)
Judgement Possible cause
Idle speed Low for all positions
(P, R, N, D)
Possible causes include malfunctions in the pressure supply system and low oil pump output.
For example
Oil pump wear
Pressure regulator valve or plug sticking or spring fatigue
Oil strainer
⇒ oil pump ⇒ pressure regulator valve passage oil leak
Engine idle speed too low
Only low for a spe-
cific position Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
High Possible causes include a sensor malfunction or malfunction in the line pressure adjustment func-
tion.
For example
Accelerator pedal position signal malfunction
ATF temperature sensor malfunction
Line pressure solenoid malfunction (sticking in “OFF” state, filter clog, cut line)
Pressure regulator valve or plug sticking
Stall speed Oil pressure does
not rise higher than
the oil pressure for
idle.
Possible causes include a sensor malfunction or malfunction in the pressure adjustment function.
For example
Accelerator pedal position signal malfunction
TCM breakdown
Line pressure solenoid malfunction (shorting, sticking in“ ON” state)
Pressure regulator valve or plug sticking
Pilot valve sticking or pilot filter clogged
The pressure rises,
but does not enter
the standard posi-
tion. Possible causes include malfunctions in the pressure supply system and malfunction in the pres-
sure adjustment function.
For example
Accelerator pedal position signal malfunction
Line pressure solenoid malfunction (sticking, filter clog)
Pressure regulator valve or plug sticking
Pilot valve sticking or pilot filter clogged
Only low for a spe-
cific position Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
Revision: December 20092009 QX56

Page 3838 of 4171

INFINITI QX56 2009 Factory Service Manual
TM-190
< ON-VEHICLE MAINTENANCE >
ROAD TEST
ROAD TEST
DescriptionINFOID:0000000003772026
ROAD TEST
The road test inspects overall performance of the A/T and analyzes possible malfunction causes.

TM-190
< ON-VEHICLE MAINTENANCE >
ROAD TEST
ROAD TEST
DescriptionINFOID:0000000003772026
ROAD TEST
The road test inspects overall performance of the A/T and analyzes possible malfunction causes.
The road test is carried out in the following three stages.
1. Check before engine is started. Refer to TM-190
.
2. Check at idle. Refer to TM-190
.
3. Cruise test Inspect all the items from Part 1 to Part 3. Refer to TM-191
, TM-193, TM-194.
Before beginning the road test, check t he test procedure and inspection items.
Test all inspection items until the symptom is unc overed. Diagnose NG items when all road tests are com-
plete.
Check Before Engine Is StartedINFOID:0000000003772027
1.CHECK AT CHECK INDICATOR LAMP
1. Park vehicle on level surface.
2. Move selector lever to “P” position.
3. Turn ignition switch to “OFF” position and wait at least 10 seconds.
4. Turn ignition switch to “ON” position. (Do not start engine.)
Does AT CHECK indicator lamp light up for about 2 seconds?
YES >> 1. Turn ignition switch to “OFF” position. 2. Carry out the self-diagnostics and record al l NG items on the diagnostics worksheet. Refer to
TM-32, "CONSULT-III Function (TRANSMISSION)"
.
3. Go to TM-190, "Check At Idle"
.
NO >> Stop the road test and go to TM-119, "A/T Check Indicator Lamp Does Not Come On"
.
Check At IdleINFOID:0000000003772028
1.CHECK STARTING THE ENGINE
1. Park vehicle on level surface.
2. Move selector lever to “P” or “N” position.
3. Turn ignition switch to “OFF” position.
4. Turn ignition switch to “START” position.
Does the engine start?
YES >> GO TO 2.
NO >> Stop the road test and go to TM-119, "Engine Cannot Be Started in "P" or "N" Position"
.
2.CHECK STARTING THE ENGINE
1. Turn ignition switch to “ON” position.
2. Move selector lever in “D”,“4”, “3”, “2”, “1” or “R” position.
3. Turn ignition switch to “START” position.
Does the engine start in either position?
YES >> Stop the road test and go to TM-119, "Engine Cannot Be Started in "P" or "N" Position".
NO >> GO TO 3.
3.CHECK “P” POSITION FUNCTIONS
1. Move selector lever to “P” position.
2. Turn ignition switch to “OFF” position.
3. Release the parking brake.
4. Push the vehicle forward or backward.
5. Engage the parking brake.
When you push the vehicle with disengaging the parking brake, does it move?
Revision: December 20092009 QX56

Page 3839 of 4171

INFINITI QX56 2009 Factory Service Manual
ROAD TESTTM-191
< ON-VEHICLE MAINTENANCE >
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YES >> Enter a check mark at “In “P” Position V ehicle Moves When Pushed” on the diagnostics work-
sheet, then contin

ROAD TESTTM-191
< ON-VEHICLE MAINTENANCE >
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YES >> Enter a check mark at “In “P” Position V ehicle Moves When Pushed” on the diagnostics work-
sheet, then continue the road test.
NO >> GO TO 4.
4.CHECK “N” POSITION FUNCTIONS
1. Start the engine.
2. Move selector lever to “N” position.
3. Release the parking brake.
Does vehicle move forward or backward?
YES >> Enter a check mark at “In “N” Position Ve hicle Moves” on the diagnostics worksheet, then con-
tinue the road test.
NO >> GO TO 5.
5.CHECK SHIFT SHOCK
1. Engage the brake.
2. Move selector lever to “D” position.
When the transmission is shifted from
“N” to “D”, is there an excessive shock?
YES >> Enter a check mark at “Large Shock ("N" to "D" Position) on the diagnostics worksheet, then con-
tinue the road test.
NO >> GO TO 6.
6.CHECK “R” POSITION FUNCTIONS
1. Engage the brake.
2. Move selector lever to “R” position.
3. Release the brake for 4 to 5 seconds.
Does the vehicle creep backward?
YES >> GO TO 7.
NO >> Enter a check mark at “Vehicle Does Not Creep Backward In "R" Position” on the diagnostics worksheet, then continue the road test.
7.CHECK “D” POSITION FUNCTIONS
Inspect whether the vehicle creeps forward when the transmission is put into the “D” position.
Does the vehicle creep forward in the
“D” positions?
YES >> Go to TM-191, "Cruise Test - Part 1", TM-193, "Cruise Test - Part 2", and TM-194, "Cruise Test -
Part 3".
NO >> Enter a check mark at “Vehicle Does Not Creep Forward in "D" Position” on the diagnostics work- sheet, then continue the road test.
Cruise Test - Part 1INFOID:0000000003772029
1.CHECK STARTING OUT FROM D1
1. Drive the vehicle for about 10 minutes to warm up the engine oil and ATF. Appropriate temperature for the ATF: 50 - 80 °C (122 - 176 °F)
2. Park the vehicle on a level surface.
3. Move selector lever to “P” position.
4. Start the engine.
5. Move selector lever to “D” position.
6. Press the accelerator pedal about half way down to accelerate the vehicle.
With CONSULT-III
Read off the gear positions.
Starts from D1?
YES >> GO TO 2.
NO >> Enter a check mark at “Vehicle Cannot be Started From D1” on the diagnostics worksheet, then
continue the road test.
2.CHECK SHIFT-UP D1 → D2
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D1 → D2) at the appropri-
ate speed.
Revision: December 20092009 QX56

Page 3840 of 4171

INFINITI QX56 2009 Factory Service Manual
TM-192
< ON-VEHICLE MAINTENANCE >
ROAD TEST
Refer to TM-290, "Vehicle Speed at Which Gear Shifting Occurs".
With CONSULT-III
Read the gear position, throttle degree of opening, and vehicle speed.
D

TM-192
< ON-VEHICLE MAINTENANCE >
ROAD TEST
Refer to TM-290, "Vehicle Speed at Which Gear Shifting Occurs".
With CONSULT-III
Read the gear position, throttle degree of opening, 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 “A/T Does Not Shift: D1 → D2” on the diagnostics worksheet, then continue
the road test.
3.CHECK SHIFT-UP D2 → D3
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D2 → D3) at the appropri-
ate speed.
Refer to TM-290, "Vehicle Speed at Which Gear Shifting Occurs"
.
With CONSULT-III
Read the gear position, throttle degree of opening, 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 “A/T Does Not Shift: D2 → D3” on the diagnostics worksheet, then continue
the road test.
4.CHECK SHIFT-UP D3 → D4
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D3 → D4) at the appropri-
ate speed.
Refer to TM-290, "Vehicle Speed at Which Gear Shifting Occurs"
.
With CONSULT-III
Read the gear position, throttle degree of opening, and vehicle speed.
Does the A/T shift-up D3
→ D4 at the correct speed?
YES >> GO TO 5.
NO >> Enter a check mark at “A/T Does Not Shift: D3 → D4” on the diagnostics worksheet, then continue
the road test.
5.CHECK SHIFT-UP D4 → D5
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D4 → D5) at the appropri-
ate speed.
Refer to TM-290, "Vehicle Speed at Which Gear Shifting Occurs"
.
With CONSULT-III
Read the gear position, throttle degree of opening, and vehicle speed.
Does the A/T shift-up D4
→ D5 at the correct speed?
YES >> GO TO 6.
NO >> Enter a check mark at “A/T Does Not Shift: D4 → D5” on the diagnostics worksheet, then continue
the road test.
6.CHECK LOCK-UP
When releasing accelerator pedal from D5, check lock-up from D5 to L/U.
Refer to TM-290, "Vehicle Speed at Which Gear Shifting Occurs"
.
With CONSULT-III
Select “TCC SOLENOID 0.00A” with the “MAIN SIGNAL” mode for A/T.
Does it lock-up?
YES >> GO TO 7.
NO >> Enter a check mark at “A/T Does Not Pe rform Lock-up” on the diagnostics worksheet, then con-
tinue the road test.
7.CHECK LOCK-UP HOLD
Does it maintain lock-up status?
YES >> GO TO 8.
Revision: December 20092009 QX56

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