2008 INFINITI QX56 Factory Service Manual

fuel consumption transmission oil start stop button differential four wheel drive open gas tank

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INFINITI QX56 2008 Factory Service Manual TM-190
< ON-VEHICLE MAINTENANCE >
ROAD TEST
YES >> Enter a check mark at “In “P” Position Vehicle Moves When Pushed” on the diagnostics work-sheet, then continue the road test.
NO >> GO TO 4.

TM-190
< ON-VEHICLE MAINTENANCE >
ROAD TEST
YES >> Enter a check mark at “In “P” Position Vehicle 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 Vehicle 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-190, "Cruise Test - Part 1", TM-192, "Cruise Test - Part 2", and TM-193, "Cruise Test -
Part 3".
NO >> Enter a check mark at “Vehicle Does Not Cr eep Forward in "D" Position” on the diagnostics work-
sheet, then continue the road test.
Cruise Test - Part 1INFOID:0000000001696161
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 St arted 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: March 2010 2008 QX56

Page 3738 of 4083

INFINITI QX56 2008 Factory Service Manual ROAD TESTTM-191
< ON-VEHICLE MAINTENANCE >
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• Refer to TM-291, "Vehicle Speed at Which Gear Shifting Occurs".
With CONSULT-III
Read the gear position, throttle degree

ROAD TESTTM-191
< ON-VEHICLE MAINTENANCE >
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• Refer to TM-291, "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-291, "
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-291, "
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-291, "
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-291, "
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 Perform 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: March 2010 2008 QX56

Page 3739 of 4083

INFINITI QX56 2008 Factory Service Manual TM-192
< ON-VEHICLE MAINTENANCE >
ROAD TEST
NO >> Enter a check mark at “A/T Does Not Hold Lock-up Condition” on the diagnostics worksheet, thencontinue the road test.
8.CHECK LOCK-UP RELEASE
Chec

TM-192
< ON-VEHICLE MAINTENANCE >
ROAD TEST
NO >> Enter a check mark at “A/T Does Not Hold Lock-up Condition” on the diagnostics worksheet, thencontinue the road test.
8.CHECK LOCK-UP RELEASE
Check lock-up cancellation by depressing 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 Released” 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:0000000001696162
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 Started 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 ins pect whether or not the transmission shifts up (D1 → D2)
at the correct speed.
• Refer to TM-291, "
Vehicle Speed at Which Gear Shifting Occurs".
With CONSULT-III
Read the gear position, throttle 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 ins pect whether or not the transmission shifts up (D2 → D3)
at the correct speed.
• Refer to TM-291, "
Vehicle Speed at Which Gear Shifting Occurs".
With CONSULT-III
Read the gear position, throttle 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: March 2010 2008 QX56

Page 3740 of 4083

INFINITI QX56 2008 Factory Service Manual ROAD TESTTM-193
< ON-VEHICLE MAINTENANCE >
CEF
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When the transmission changes speed D3 → D4, return the accelerator pedal.
Does the A/T shift-up D3
→ D4 and apply the e

Page 3741 of 4083

INFINITI QX56 2008 Factory Service Manual TM-194
< ON-VEHICLE MAINTENANCE >
A/T POSITION
A/T POSITION
Checking of A/T PositionINFOID:0000000004917429
With the shift selector in the “P” position, turn the ignition switch to the ON position

Page 3742 of 4083

INFINITI QX56 2008 Factory Service Manual SHIFT CONTROL SYSTEMTM-195
< ON-VEHICLE REPAIR >
CEF
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ON-VEHICLE REPAIR
SHIFT CONTROL SYSTEM
A/T Shift Selector Removal and InstallationINFOID:0000000004917430
REMOVAL
1. Rem

Page 3743 of 4083

INFINITI QX56 2008 Factory Service Manual TM-196
< ON-VEHICLE REPAIR >
SHIFT CONTROL SYSTEM
Checking of A/T Position
INFOID:0000000004917432
1. Place shift selector in “P” position, and turn ignition switch ON (engine stop).
2. Make sure

Page 3744 of 4083

INFINITI QX56 2008 Factory Service Manual AIR BREATHER HOSETM-197
< ON-VEHICLE REPAIR >
CEF
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AIR BREATHER HOSE
Removal and InstallationINFOID:0000000004917433
VK56DE Models 2WD
CAUTION:
• Install air breather hose

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