2010 INFINITI QX56 steering

HEATED STEERING WHEELST-7
< FUNCTION DIAGNOSIS >
C
DE
F
H I
J
K L
M A
B
ST
N
O P
FUNCTION DIAGNOSIS
HEATED STEERING WHEEL
System DiagramINFOID:0000000005147859
System DescriptionINFOID:0000000005147860
The heated steering wheel switch controls the heated steeri ng relay. When the switch is turned on, the relay is
energized and the heated steering system will operate. T he heated steering system will turn off when the
steering wheel temperature reaches approximately 86 ° F (30 ° C). Heated steering system operation can also
be canceled by pressing the heated steering wheel switch again.
NOTE:
If the surface temperature of the steering wheel is below 68 ° F (20 ° C), the system will heat the steering wheel
to approximately 86 ° F (30 ° C), and cycle off and on to maintain a temperature above 68 ° F (20 ° C). The indi-
cator light will remain on as long as the system is on. Push the switch again to turn the heated steering wheel
system off manually. The indicator light will go off.
Component Parts LocationINFOID:0000000005147861
AWGIA0022GB
1. Heated steering relay M71 2. Combination switch (spiral cable) M52 3. Heated steering wheel M114
4. Heated steering wheel switch M260
ALGIA0030ZZ
Revision: April 20092010 QX56

ST-8
< FUNCTION DIAGNOSIS >
HEATED STEERING WHEEL
Component Description
INFOID:0000000005147862
Heated steering wheel switch • Controls the heated steering relay and operates the heated steering system.
• Turns the indicator lamp ON when the system is activated.
Heated steering relay • Operates the heated steering system with the control signal from the heated steering
wheel switch.
Heated steering wheel • Heats the heating element with the power supplied from the heated steering relay.
Revision: April 20092010 QX56

HEATED STEERING WHEELST-9
< COMPONENT DIAGNOSIS >
C
DE
F
H I
J
K L
M A
B
ST
N
O P
COMPONENT DIAGNOSIS
HEATED STEERING WHEEL
Wiring DiagramINFOID:0000000005147863
ABGWA0009GB
Revision: April 20092010 QX56

ST-10
< COMPONENT DIAGNOSIS >
HEATED STEERING WHEEL
ABGIA0026GB
Revision: April 20092010 QX56

HEATED STEERING WHEELST-11
< COMPONENT DIAGNOSIS >
C
DE
F
H I
J
K L
M A
B
ST
N
O P
ABGIA0027GB
Revision: April 20092010 QX56

ST-12
< SYMPTOM DIAGNOSIS >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000005147864
Use chart below to help you find the cause of the symp tom. If necessary, repair or replace these parts.
×: ApplicableReference page
ST-13, "
Checking Fluid Level
"
ST-13, "
Air Bleeding Hydraulic System
"
ST-36ST-36ST-36ST-13ST-35ST-37
EM-13, "
Checking Drive Belts
"
ST-35ST-35ST-37ST-35ST-20ST-37
DLN-184, "
NVH Troubleshooting Chart
"
DLN-208, "
NVH Troubleshooting Chart
"
FAX-5, "
NVH Troubleshooting Chart
"
FSU-5, "
NVH Troubleshooting Chart
"
WT-43, "
NVH Troubleshooting Chart
"
WT-43, "
NVH Troubleshooting Chart
"
FAX-5, "
NVH Troubleshooting Chart
"
BR-6, "
NVH Troubleshooting Chart
"
Possible cause and suspect-
ed parts
Fluid level
Air in hydraulic system
Outer socket ball joint swinging force
Outer socket ball joint rotating torque
Outer socket ball joint end play
Steering fluid leakage
Steering wheel play
Steering gear rack sliding force
Drive belt looseness
Improper steering wheel
Improper installation or looseness of tilt lock lever
Mounting rubber deterioration
Steering column deformation or damage
Improper installation or looseness of steering column
Steering linkage looseness
PROPELLER SHAFT
FRONT FINAL DRIVE
WHEEL HUB
SUSPENSION
TIRES
ROAD WHEEL
DRIVE SHAFT
BRAKES
Symptom
Noise
× × ××××× × × ××××××× ×
Shake ×××× ××××× ×
Vibration ××××× × ××× ×
Shimmy ××× × ×××× ×
Shudder × × ×××× ×
Revision: April 20092010 QX56

POWER STEERING FLUIDST-13
< ON-VEHICLE MAINTENANCE >
C
DE
F
H I
J
K L
M A
B
ST
N
O P
ON-VEHICLE MAINTENANCE
POWER STEERING FLUID
Checking Fluid LevelINFOID:0000000005147865
Check power steering fluid level with engine off, referring to the scale
on reservoir tank.
Use HOT range for fluid temperatures of 50 ° – 80 °C (122 ° – 176 °F).
Use COLD range for fluid temperatures of 0 ° – 30 °C (32° – 86°F).
CAUTION:
• Do not overfill.
• Do not reuse any used power steering fluid.
• Recommended fluid is Genuine NISSAN PSF or equivalent. Refer to MA-13, "
Fluids and Lubricants".
Checking Fluid LeakageINFOID:0000000005147866
Check the hydraulic piping lines for improper attachment and for
leaks, cracks, damage, loose connec tions, chafing or deterioration.
1. Run engine until fluid temperature reaches 50 ° – 80° C (122° –
176° F) in reservoir tank. Keep engine speed idle.
2. Turn steering wheel right-to-left several times.
3. Hold steering wheel at each “lock” position for five seconds to check fluid leakage.
CAUTION:
Do not hold steering wheel in a locked position for more
than 10 seconds. (There is the possibility that oil pump may
be damaged.)
4. If fluid leakage at connections is noticed, then loosen flare nut and then retighten. Do not over tighten con- nector as this can damage O-ring, washer and connector.
5. If fluid leakage from oil pump is noticed, check oil pump. Refer to ST-17
.
6. Check steering gear boots for accumulation of fluid indicating a leak from the steering gear.
Air Bleeding Hydraulic SystemINFOID:0000000005147867
NOTE:
• When vehicle is stationary or while steering wheel is being turned slowly, some noise may be heard from oil pump or gear. This noise is normal and does not affect any system.
• Incomplete air bleeding causes the fo llowing. When this happens, bleed air again.
- Air bubbles in reservoir tank.
- Clicking noise in oil pump.
- Excessive buzzing in oil pump.
1. Stop engine, and then turn steering wheel fully to right and left several times. CAUTION:
Do not allow steering fluid reservoir tank to go below the MIN level line. Check tank frequently and
add fluid as needed.
2. Run engine at idle speed. Turn steering wheel fully right and then fully left, hold for about three seconds.
Then check for fluid leakage.
3. Repeat step 2 several times at about three second intervals. CAUTION:
Do not hold steeri ng wheel in the locked position for more than 10 seconds. (There is the possibil-
ity that oil pump may be damaged.)
4. Check for air bubbles or cloudy fluid.
5. If air bubbles or cloudiness still exists, stop engine, perform steps 2 and 3 again until air bubbles or cloud-
iness does not exist.
LGIA0021E
SGIA0506E
Revision: April 20092010 QX56

ST-14
< ON-VEHICLE MAINTENANCE >
POWER STEERING FLUID
6. Stop engine, check fluid level.
Revision: April 20092010 QX56