sensor INFINITI QX4 2005 Factory Service Manual

EC-646Revision: October 2005
REFRIGERANT PRESSURE SENSOR
2005 QX56
3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between refrigerant pressure sensor terminal 1
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E5, F14

Harness for open or short between ECM and refrigerant pressure sensor
>> Repair harness or connectors.
5. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 3 and ECM terminal 67.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E5, F14

Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
BBIA0445E
Voltage: Approximately 5V
PBIB0188E
Continuity should exist.

REFRIGERANT PRESSURE SENSOR
EC-647
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7. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E5, F14

Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK INTERMITTENT INCIDENT
Refer to EC-156, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationUBS00HDK
REFRIGERANT PRESSURE SENSOR
Refer to ATC-185, "Removal and Installation for Refrigerant Pressure Sensor" . Continuity should exist.

SERVICE DATA AND SPECIFICATIONS (SDS)
EC-669
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SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
Fuel PressureUBS00HE9
Idle Speed and Ignition TimingUBS00HEA
*: Under the following conditions:

Air conditioner switch: OFF

Electric load: OFF (Lights and heater fan)

Steering wheel: Kept in straight-ahead position
Calculated Load ValueUBS00HEB
Mass Air Flow SensorUBS00HEC
*: Engine is warmed up to normal operating temperature and running under no load.
Intake Air Temperature SensorUBS00HED
Engine Coolant Temperature SensorUBS00HEE
A/F Sensor 1 HeaterUBS00HEF
Heated Oxygen sensor 2 HeaterUBS00HEG
Crankshaft Position Sensor (POS)UBS00HEH
Refer to EC-290, "Component Inspection" .
Camshaft Position Sensor (PHASE)UBS00HEI
Refer to EC-297, "Component Inspection" .
Throttle Control MotorUBS00HEJ
Fuel pressure at idling kPa (kg/cm2 , psi)Approximately 350 (3.57, 51)
Target idle speed
No-load* (in P or N position)650±50 rpm
Air conditioner: ON In P or N position 700 rpm or more
Ignition timing In P or N position 15° ± 5° BTDC
Condition Calculated load value % (Using CONSULT-II or GST)
At idle14.0 - 33.0
At 2,500 rpm12.0 - 25.0
Supply voltage Battery voltage (11 - 14V)
Output voltage at idle1.0 - 1.3V*
Mass air flow (Using CONSULT-II or GST)3.0 - 9.0 g·m/sec at idle*
9.0 - 28.0 g·m/sec at 2,500 rpm*
Temperature °C (°F) Resistance kΩ
25 (77)1.94 - 2.06
80 (176)0.295 - 0.349
Temperature °C (°F) Resistance kΩ
20 (68)2.1 - 2.9
50 (122)0.68 - 1.00
90 (194)0.236 - 0.260
Resistance [at 25°C (77°F)] 2.3 - 4.3Ω
Resistance [at 25°C (77°F)] 5.0 - 7.0Ω
Resistance [at 25°C (77°F)] Approximately 1 - 15Ω

EI-16
REAR BUMPER
Revision: October 20052005 QX56
1. Remove quarter panel trim covers LH and RH.
2. Disconnect sonar sensor harness connector under rear fascia assembly.
3. Release retainer clips on both sides of rear fascia assembly with a 1/4 turn and top S clips and remove
fascia assembly.
4. Remove energy absorber.
5. Remove reinforcement assembly.
6. Remove nuts and remove retainer assembly.

Remove S clips from retainer assembly.
7. Disconnect sonar sensors from sonar sensor retainers.
8. Remove sonar sensors and harness from rear fascia assembly.

Disconnect sonar sensors from harness.

Remove sonar sensor retainers from rear fascia assembly.
9. Remove bolts on each side of tow hitch and remove tow hitch.
10. Remove drafter duct from under LH quarter panel.
Installation is in the reverse order of removal.
1. Retainer assembly 2. Plastic clip 3. S clip
4. Reinforcement assembly 5. Energy absorber 6. Sonar sensor
7. Quarter panel trim cover LH 8. Drafter duct 9. Retainer clip
10. Rear fascia assembly 11. Sonar sensor retainer 12. Tow hitch
13. Sonar sensor harness 14. Quarter panel trim cover RH

EI-36
BODY SIDE TRIM
Revision: October 20052005 QX56
Installation is in the reverse order of removal.
CENTER PILLAR LOWER FINISHER
Removal and Installation
1. Remove front and rear door welts.
2. Remove seat belt anchor. Refer to SB-3, "
Removal and Installation of Front Seat Belt" .

On RH side, disconnect seat belt tension sensor.
3. Remove front and rear kicking plates. Refer to EI-36, "
KICKING PLATES" .
4. Remove center pillar lower finisher.
Installation is in the reverse order of removal.
CENTER PILLAR UPPER FINISHER
Removal and Installation
1. Remove center pillar lower finisher. Refer to EI-36, "CENTER PILLAR LOWER FINISHER" .
2. Remove assist grip.
3. Remove center pillar upper finisher.
Installation is in the reverse order of removal.
FRONT PILLAR FINISHER
Removal and Installation
1. Remove assist grip.
2. Remove front pillar finisher.
Installation is in the reverse order of removal.
KICKING PLATES
Removal and Installation
Release clips and remove front and/or rear kicking plates.
Installation is in the reverse order of removal.
MUDGUARD FINISHERS
Removal and Installation
Release clips and remove front and/or rear mudguard finishers.
Installation is in the reverse order of removal.
DOOR PARTING SEALS
Removal and Installation
1. Open front and/or rear doors fully.
2. Release clips and remove parting seals.
Installation is in the reverse order of removal.

PREPARATION
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PREPARATIONPFP:00002
Special Service ToolsEBS00LLR
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
KV10111100
(J-37228)
Seal cutterRemoving steel oil pan and rear timing chain
case
—
(J-44626)
Air fuel sensor SocketLoosening or tightening air fuel ratio A/F sen-
sor
a: 22 mm (0.87 in)
EG15050500
(J-45402)
Compression gauge adapterInspecting compression pressure
KV10116200
(J-26336-A)
Valve spring compressor
1. KV10115900
(J-26336-20)
Attachment
2. KV10109220
(—)
AdapterDisassembling valve mechanism
Part (1) is a component of KV10116200
(J26336-A), but part (2) is not.
KV10112100
(BT-8653-A)
Angle wrenchTightening bolts for cylinder head, main bear-
ing cap and connecting rod cap
KV10107902
(J-38959)
Valve oil seal pullerRemoving valve oil seal
S-NT046
LBIA0444E
ZZA1225D
PBIC1650E
S-NT014
S-NT011

EM-8Revision: October 2005
PREPARATION
2005 QX56
Valve guide reamer 1: Reaming valve guide hole
2: Reaming hole for oversize valve guide
Intake & Exhaust:
d
1 : 6.0 mm (0.236 in) dia.
d
2 : 10.175 - 10.196 mm (0.4006 - 0.4014 in)
dia.
Front oil seal drift Installing front oil seal
Rear oil seal drift Installing rear oil seal
(J-43897-18)
(J-43897-12)
Oxygen sensor thread cleanerReconditioning the exhaust system threads
before installing a new A/F sensor and heated
oxygen sensor (Use with anti-seize lubricant
shown below.)
a: J-43897-18 (18 mm dia.) for zirconia
heated oxygen sensor
b: J-43897-12 (12 mm dia.) for titania heat-
ed oxygen sensor
Anti-seize lubricant (Permatex 133AR
or equivalent meeting MIL specifica-
tion MIL-A-907)Lubricating A/F sensors and heated oxygen
sensor thread cleaning tool when recondition-
ing exhaust system threads (Kent-Moore No.)
Tool nameDescription
S-NT016
ZZA0012D
ZZA0025D
AEM488
AEM489

EXHAUST MANIFOLD AND THREE WAY CATALYST
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EXHAUST MANIFOLD AND THREE WAY CATALYSTPFP:14004
Removal and InstallationEBS00LM2
REMOVAL
WA RN ING:
Perform the work when the exhaust and cooling system have cooled sufficiently.
1. Remove the air duct and resonator assembly. Refer to EM-14, "
REMOVAL" .
2. Drain the engine coolant from the radiator. Refer to MA-13, "
DRAINING ENGINE COOLANT" .
3. Remove the engine undercover using power tool.
4. Remove the radiator and radiator hoses. Refer to CO-12, "
RADIATOR" .
5. Remove the drive belts. Refer to EM-12, "
Removal" .
6. Remove the air fuel ratio A/F sensors (right bank, left bank).

Follow steps below to remove each air fuel ratio A/F sensor.
a. Remove the engine room cover using power tool. Refer to EM-11, "
REMOVAL" .
b. Remove the harness connector of each air fuel ratio A/F sensor, and harness from bracket and middle
clamp.
1. Air fuel ratio (A/F) sensor 1 (bank 2) 2. Exhaust manifold cover (bank 2) 3. Exhaust manifold (bank 2)
4. Gaskets 5. Exhaust manifold (left bank 1) 6. Exhaust manifold cover (bank 1)
7. Air fuel ratio (A/F) sensor 1 (bank 1)
WBIA0466E

EM-20Revision: October 2005
EXHAUST MANIFOLD AND THREE WAY CATALYST
2005 QX56
c. Remove the air fuel ratio A/F sensors from both left and right
exhaust manifolds using Tool.
CAUTION:

Be careful not to damage the air fuel ratio A/F sensors

Discard any air fuel ratio A/F sensor which has been
dropped from a height of more than 0.5m (19.7 in) onto a
hard surface such as a concrete floor. Replace it with a
new one.
7. Remove the front cross bar.
8. Remove the exhaust manifold (left bank) following the steps
below.
a. Remove the exhaust front tube. Refer to EX-3, "
Removal and
Installation" .
b. Remove the exhaust manifold cover.
c. Loosen the nuts in reverse order of illustration using power tool.
d. Remove the exhaust studs from positions 2, 4, 6, 8 and remove
left exhaust manifold
9. Remove the exhaust manifold (right bank) following the steps
below.
a. Remove the exhaust front tube. Refer to EX-3, "
Removal and
Installation" .
b. Remove the oil level gauge guide. Refer to EM-22, "
OIL PAN
AND OIL STRAINER" .
c. Remove the exhaust manifold cover.
d. Loosen the nuts in reverse order of illustration using power tool.
e. Remove the exhaust studs from positions 2, 4, 6, 8 and remove right exhaust manifold.
INSPECTION AFTER REMOVAL
Surface Distortion

Check the flatness of each exhaust manifold flange surface
using suitable tools.

If measurement exceeds the limit, replace the exhaust manifold.
INSTALLATION
Installation is in the reverse order of removal.

Install new exhaust manifold gasket with the top of the triangular
up mark on it facing up and its coated face (gray side) toward
the exhaust manifold side.Tool number : — (J-44626)
WBIA0630E
KBIA2464E
Flatness limit : 0.3 mm (0.012 in)
KBIA2504E
KBIA2553E

EXHAUST MANIFOLD AND THREE WAY CATALYST
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Tighten the exhaust manifold nuts in the numerical order shown.
Then recheck the torque of the nuts.

Before installing new air fuel ration A/F sensors, clean the exhaust system threads using Tool and apply
anti-seize lubricant.
CAUTION:

Do not over tighten the air fuel ratio A/F sensors. Doing so may cause damage to the sensor,
resulting in the MIL coming on.
KBIA2464E
Tool number : ( — ) J-43879-12
: ( — ) J-43897-18