2010 INFINITI QX56 oil pressure

SCS-12
< COMPONENT DIAGNOSIS >
C1804 HEIGHT ADJUSTING MALFUNCTION (COMPRESSOR)
C1804 HEIGHT ADJUSTING MA LFUNCTION (COMPRESSOR)
DescriptionINFOID:0000000005148160
The compressor motor relay is controlled by the sus pension control unit. The suspension control unit supplies
voltage to the coil side of the relay to activate it. T he compressor motor relay, when activated, supplies power
to the suspension air compressor.
DTC LogicINFOID:0000000005148161
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000005148162
1.CHECK COMPRESSOR MOTOR RELAY OPERATION
CAUTION:
The "COMPRESSOR" active test will remain ON until it is turned off using CONSULT-III. Allowing the
compressor to run for an extended period of time may cause damage to the air levelizer system com-
ponents due to excessive air pressure.
CONSULT-III
1. Turn ignition ON.
2. Select "COMPRESSOR" of AIR LEVELIZER active test items.
3. While operating test item, check that the suspension air compressor turns ON.
Does the suspension air compressor operate properly?
YES >> Compressor motor relay and suspension air compressor are operating normally.
NO >> Refer to SCS-20, "
Diagnosis Procedure".
DTC CONSULT-III Diagnostic item is detected when ... Probable malfunction location
C1804 VEHICLE HEIGHT AD-
JUSTING MALFUNC-
TION (COMPRESSOR) Continuous compressor relay ON time is more
than 120 seconds.
Compressor motor relay. Refer to
SCS-20,
"Component Function Check".
ON : Compressor turns ON
OFF : Compressor turns OFF
Revision: April 20092010 QX56

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
SEC-111
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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26 P/L Headlamp aiming mo-
tors
Output —Lighting
switch 2nd
position or
AUTO, head-
lamp aiming
switch in po-
sition OFF
0V
ON Battery voltage
27 W/B Fuse 38
(With trailer tow)
Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
30 W Fuse 53 Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
32 L Wiper low speed sig-
nal
OutputON or
START Wiper switch OFF
Battery voltage
LO or INT 0V
35 L/B Wiper high speed sig-
nal
OutputON or
START Wiper switch OFF, LO, INT Battery voltage
HI 0V
37 Y Power generation
command signal Output —Ignition switch ON
6.3 V
40% is set on "Active test,"
"ALTERNATOR DUTY" of
"ENGINE" 3.8 V
40% is set on "Active test,"
"ALTERNATOR DUTY" of
"ENGINE" 1.4 V
38 B Ground Input ——0V
39 L CAN-H — ON— —
40 P CAN-L — ON— —
41 Y/B Hood switch Input —Hood closed OFF
0V
Hood open ON Battery voltage
42 GR Oil pressure switch Input — Engine running
Battery voltage
Engine stopped 0V
Te r m i n a l
Wire
color Signal name Signal
input/
output Measuring condition
Reference value(Approx.)
Igni-
tion
switch Operation or condition
JPMIA0001GB
JPMIA0002GB
JPMIA0003GB
Revision: April 20092010 QX56

PREPARATIONST-5
< PREPARATION >
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PREPARATION
PREPARATION
Special Service ToolINFOID:0000000005147857
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name Description
HT72520000
(J-25730-A)
Ball joint remover Removing ball joint
KV40107300
(—)
Band clamp pliers Crimping boot clamps
1. KV48105300-4 and 5295262U10
(—
Connector A and O-ring
2. KV48105300-3 and 5295262U00
(—)
Eye-bolt and O-ring
3. KV48103500
(J-26357 and J-26357-10)
Pressure gauge and shut-off valve
4. KV48105300-1 and 5295262U00
(—)
Connector B and O-ring
5. KV48105300-2 —— )
Nut Measuring oil pump relief pressure
ST27180001
(J-25726-A)
Steering wheel puller Removing steering wheel
NT146
ZZA1229D
SGIA0427E
ZZA0819D
Revision: April 20092010 QX56

POWER STEERING OIL PUMPST-17
< ON-VEHICLE REPAIR >
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POWER STEERING OIL PUMP
On-Vehicle Inspection and ServiceINFOID:0000000005147869
CHECKING RELIEF OIL PRESSURE
CAUTION:
Before starting work, confirm belt tension is proper.
1. Connect Tool between oil pump discharge connector and high pressure hose and then bleed air from the hydraulic circuit.
2. Start engine. Allow engine to run until tank temperature reaches 50 °– 80° C (122° – 176°F).
CAUTION:
• Warm up engine with shut-off valve fully opened. If engine is started with shut-off valve closed,
fluid pressure in power steering pump increases to maximum. This will raise fluid temperature
excessively.
• Be careful not to contact hose with belt when engine is started.
3. With engine at idle, close shut-off valve and read the relief oil pressure.
CAUTION:
Do not close shut-off valve of pressure gauge for more than 10 seconds.
4. After measurement, open shut-off valve slowly. • If relief oil pressure is outside the specification, repair or replace oil pump. Refer to ST-34, "
Disassembly
and Assembly" .
5. After inspection, disconnect oil pressure gauge and oil pressure gauge adapter from hydraulic circuit, con-
nect oil pump discharge connector and high pressure hose. Add fluid and bleed air from hydraulic circuit
thoroughly. Refer to ST-13, "
Air Bleeding Hydraulic System" .
Tool number:
Pressure gauge and shut-off valve KV48103500
(J26357 and J26357-10)
Oil pump side Connector A and O-
ring
KV48105300-4 and 5295262U10
(—)
Eye-bolt and O-ring KV48105300-3 and 5295262U00
(—)
High pressure
piping side Connector B and O-
ring
KV48105300-1 and 5295262U00
(—)
Nut KV48105300-2
( — )
SGIA0570E
Relief oil pressure : Refer to
ST-37, "Oil Pump".
Revision: April 20092010 QX56

ST-24
< REMOVAL AND INSTALLATION >
POWER STEERING GEAR AND LINKAGE
7. Remove steering outer socket from steering knuckle using Tool.Be careful not to damage ball joint boot.
CAUTION:
Temporarily tighten nut to prevent damage to threads and
to prevent Tool from coming off.
8. Remove oil piping (high pressure side and low pressure side) from steering gear assembly, then drain fluid from piping.
9. Remove lower joint bolt of lower joint shaft.
10. Remove nuts of steering gear assembly using power tool, then remove bolts and steering gear assembly.
INSTALLATION
Installation is in the reverse order of removal.
• After removing/installing or replacing steering components, check wheel alignment. Refer to FSU-6, "
Front
Wheel Alignment".
• After adjusting wheel alignment, adjust neutral position of steering angle sensor. Refer to BRC-8, "
ADJUST-
MENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement".
Tool number : HT72520000 (J-25730-A)
WGIA0130E
LGIA0032E
LGIA0029E
LGIA0024E
Revision: April 20092010 QX56

ST-26
< REMOVAL AND INSTALLATION >
POWER STEERING OIL PUMP
POWER STEERING OIL PUMP
Removal and InstallationINFOID:0000000005147874
REMOVAL
1. Drain power steering fluid from reservoir tank.
2. Remove engine room cover. Refer to EM-24, "
Removal and Installation".
3. Remove air duct assembly. Refer to EM-25, "
Removal and Installation".
4. Remove power steering reservoir tank.
5. Remove serpentine drive belt belt from auto tensioner and power steering pump. Refer to EM-13,
"Removal and Installation".
6. Disconnect pressure sensor electrical connector.
7. Remove high pressure and low pressure piping from power steering oil pump. Refer to ST-27
.
8. Remove bolts, then remove power steering pump.
INSTALLATION
Installation is in the reverse order of removal. Refer to ST-27 for tightening torque.
• After installation, bleed air. Refer to ST-13, "
Air Bleeding Hydraulic System".
NOTE:
Belt tension is automatic and requires no adjustment.
Revision: April 20092010 QX56

HYDRAULIC LINEST-27
< REMOVAL AND INSTALLATION >
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HYDRAULIC LINE
Removal and InstallationINFOID:0000000005147875
Refer to the following illustration for hydralic line removal.
Installation is in the reverse order of removal.
1. Reservoir tank 2. Suction hose 3. High pressure hose
4. Oil cooler 5. Steering gear assembly 6. Reservoir tank bracket
7. Eye bolt 8. O-rings
AWGIA0115GB
Revision: April 20092010 QX56

ST-34
< DISASSEMBLY AND ASSEMBLY >
POWER STEERING OIL PUMP
POWER STEERING OIL PUMP
Disassembly and AssemblyINFOID:0000000005147878
INSPECTION BEFORE DISASSEMBLY
Disassemble the power steering oil pump only if the following items are found.
• Deformed or damaged pulley, bracket, connector or suction pipe.
• Oil leakage from the suction pipe or connector.
DISASSEMBLY
NOTE:
Mount the power steering oil pump in a vise as needed.
1. Remove the connector bolt, connector and copper washers. CAUTION:
Do not reuse the copper washers.
2. Remove the suction pipe and O-ring. CAUTION:
Do not reuse the O-ring.
3. Remove the pulley nut and pulley.
4. Remove the bracket bolts and bracket.
INSPECTION AFTER DISASSEMBLY
Body Assembly Inspection
Check the power steering oil pump body assembly fo r damage. If any damage is found, replace with a new
power steering oil pump assembly.
ASSEMBLY
Assembly is in the reverse order of disassembly.
CAUTION:
• Do not reuse the copper gaskets
• Do not reuse the O-ring. Apply a coat of Ge nuine Nissan PSF or equivalent to the O-ring.
1. Bracket 2. Spring washer3. Pulley
4. Power steering pump 5. High pressure hose bracket 6. O-ring
7. Suction pipe Front
LGIA0038E
Revision: April 20092010 QX56