2011 INFINITI QX56 oil level

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P0300, P0301, P0302, P0303, P0304, P0305,
P0306, P0307, P0308 MISFIRE ..................... ..
291
DTC Logic ........................................................... ..291
Diagnosis Procedure .............................................292
P0327, P0328, P0332, P0333 KS ....................297
DTC Logic ........................................................... ..297
Diagnosis Procedure .............................................297
Component Inspection (Knock Sensor) ................298
P0335 CKP SENSOR .......................................299
DTC Logic ........................................................... ..299
Diagnosis Procedure .............................................299
Component Inspection (Crankshaft Position Sen-
sor) ........................................................................
301
P0340, P0345 CMP SENSOR ..........................303
DTC Logic ........................................................... ..303
Diagnosis Procedure .............................................304
Component Inspection (Camshaft Position Sen-
sor) ........................................................................
306
P0420, P0430 THREE WAY CATALYST
FUNCTION .......................................................
307
DTC Logic ........................................................... ..307
Component Function Check ..................................308
Diagnosis Procedure .............................................309
P0441 EVAP CONTROL SYSTEM ..................312
DTC Logic ........................................................... ..312
Component Function Check ..................................313
Diagnosis Procedure .............................................314
P0443 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE .......................
317
DTC Logic ........................................................... ..317
Diagnosis Procedure .............................................318
Component Inspection (EVAP Canister Purge
Volume Control Solenoid Valve) ...........................
320
P0444, P0445 EVAP CANISTER PURGE
VOLUME CONTROL SOLENOID VALVE .......
322
DTC Logic ........................................................... ..322
Diagnosis Procedure .............................................322
Component Inspection (EVAP Canister Purge
Volume Control Solenoid Valve) ...........................
323
P0447 EVAP CANISTER VENT CONTROL
VALVE ..............................................................
325
DTC Logic ........................................................... ..325
Diagnosis Procedure .............................................325
Component Inspection (EVAP Canister Vent Con-
trol Valve) ............................................................ ..
327
P0448 EVAP CANISTER VENT CONTROL
VALVE ..............................................................
329
DTC Logic ........................................................... ..329
Diagnosis Procedure .............................................329
Component Inspection (EVAP Canister Vent Con-
trol Valve) ............................................................ ..
331
P0451 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
333
DTC Logic ............................................................ ..333
Diagnosis Procedure .............................................333
Component Inspection (EVAP Control System
Pressure Sensor) ................................................. ..
335
P0452 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
336
DTC Logic ..............................................................336
Diagnosis Procedure .............................................337
Component Inspection (EVAP Control System
Pressure Sensor) ................................................. ..
339
P0453 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
341
DTC Logic ..............................................................341
Diagnosis Procedure .............................................342
Component Inspection (EVAP Control System
Pressure Sensor) ................................................. ..
345
P0456 EVAP CONTROL SYSTEM .................346
DTC Logic ..............................................................346
Diagnosis Procedure .............................................347
Component Inspection (Fuel Filler Cap) ................350
P0460 FUEL LEVEL SENSOR .......................352
DTC Logic ............................................................ ..352
Diagnosis Procedure .............................................352
P0461 FUEL LEVEL SENSOR .......................353
DTC Logic ..............................................................353
Component Function Check ..................................353
Diagnosis Procedure .............................................354
P0462, P0463 FUEL LEVEL SENSOR ...........355
DTC Logic ..............................................................355
Diagnosis Procedure .............................................355
P0500 VSS ......................................................356
Description ........................................................... ..356
DTC Logic ..............................................................356
Component Function Check ..................................357
Diagnosis Procedure .............................................357
P0506 ISC SYSTEM ........................................358
Description .............................................................358
DTC Logic ..............................................................358
Diagnosis Procedure .............................................358
P0507 ISC SYSTEM ........................................360
Description .............................................................360
DTC Logic ..............................................................360
Diagnosis Procedure .............................................360
P050E COLD START CONTROL ...................362
Description .............................................................362
DTC Logic ..............................................................362
Diagnosis Procedure .............................................362
P0524 ENGINE OIL PRESSURE ....................364
Revision: 2010 May2011 QX56

COMPONENT PARTSEC-19
< SYSTEM DESCRIPTION > [VK56VD]
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Component DescriptionINFOID:0000000006217657
1. ASCD steering switch
ICC steering switch 2. Snow mode switch 3. Fuel level sensor unit and fuel pump
assembly (with fuel tank temperature
sensor)
4. Fuel pump control module (FPCM) 5. EVAP canister vent control valve 6. EVAP canister
7. EVAP control system pressure sen- sor 8. Stop lamp switch 9. ASCD brake switch
ICC brake switch
10. Accelerator pedal position sensor
JSBIA0606ZZ
Component Reference
ECM EC-23, "
ECM"
Malfunction indicator lamp (MIL)EC-30, "Malfunction Indicator Lamp (MIL)"
Ignition coil with power transistorEC-29, "Ignition Coil With Power Transistor"
Accelerator pedal position sensorEC-21, "Accelerator Pedal Position Sensor"
Mass air flow sensor
EC-31, "Mass Air Flow Sensor (With Intake Air Temperature Sen-
sor)"Intake air temperature sensor
Electric throttle control actuator
EC-23, "
Electric Throttle Control Actuator"Throttle control motor relay
Throttle control motor
Throttle position sensor
Crankshaft position sensorEC-23, "
Crankshaft Position Sensor"
Camshaft position sensorEC-22, "Camshaft Position Sensor"
Engine coolant temperature sensorEC-25, "Engine Coolant Temperature Sensor"
Revision: 2010 May2011 QX56

EC-20
< SYSTEM DESCRIPTION >[VK56VD]
COMPONENT PARTS
High pressure fuel pump
EC-28, "High Pressure Fuel Pump"
Low pressure fuel pumpEC-30, "Low Pressure Fuel Pump"
Fuel pump control module (FPCM)EC-27, "Fuel Pump Control Module"
Fuel rail pressure sensorEC-27, "Fuel Rail Pressure Sensor"
Low fuel pressure sensorEC-30, "Low Fuel Pressure Sensor"
Fuel injectorEC-26, "Fuel Injector"
Fuel level sensorEC-26, "Fuel Level Sensor"
Fuel tank temperature sensorEC-27, "Fuel Tank Temperature Sensor"
A/F sensor 1
EC-21, "Air Fuel Ratio (A/F) Sensor 1"A/F sensor 1 heater
Heated oxygen sensor 2EC-27, "
Heated Oxygen Sensor 2"Heated oxygen sensor 2 heater
Manifold absolute pressure sensorEC-31, "
Manifold Absolute Pressure Sensor"
Knock sensorEC-30, "Knock Sensor"
Engine oil temperature sensorEC-25, "Engine Oil Temperature Sensor"
Power steering pressure sensorEC-31, "Power Steering Pressure (PSP) Sensor"
Electrically-controlled cooling fan coupling EC-24, "Electrically-controlled cooling fan coupling"
Intake valve timing control solenoid valveEC-29, "Intake Valve Timing Control Solenoid Valve"
VVEL control moduleEC-32, "VVEL Control Module"
VVEL actuator motor relayEC-32, "VVEL Actuator Motor Relay"
VVEL actuator motorEC-32, "VVEL Actuator Motor"
VVEL control shaft position sensor EC-32, "VVEL Control Shaft Position Sensor"
EVAP control system pressure sensor EC-26, "EVAP Control System Pressure Sensor"
EVAP canister vent control valveEC-26, "EVAP Canister Vent Control Valve"
EVAP canister purge volume control solenoid valveEC-26, "EVAP Canister Purge Volume Control Solenoid Valve"
Battery current sensor (with battery temperature sensor)EC-22, "Battery Current Sensor (With Battery Temperature Sen-
sor)"
Refrigerant pressure sensor
EC-32, "Refrigerant Pressure Sensor"
Stop lamp switch
EC-21, "ASCD Brake Switch & Stop Lamp Switch"ASCD brake switch
ASCD steering switchEC-21, "
ASCD Steering Switch"
Information displayEC-49, "AUTMATIC SPEED CONTROL DEVICE (ASCD) : Switch
Name and Function"
Stop lamp switch
EC-29, "ICC Brake Switch & Stop Lamp Switch"ICC brake switch
ICC steering switchEC-29, "
ICC Steering Switch"
Component Reference
Revision: 2010 May2011 QX56

EC-26
< SYSTEM DESCRIPTION >[VK56VD]
COMPONENT PARTS
EVAP Control System Pressure Sensor
INFOID:0000000006256476
The EVAP control system pressure s ensor detects pressure in the
purge line. The sensor output voltage to the ECM increases as pres-
sure increases.
EVAP Canister Vent Control ValveINFOID:0000000006256477
The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows “EVAP
Control System” diagnosis.
EVAP Canister Purge Volume Control Solenoid ValveINFOID:0000000006217671
The EVAP canister purge volume control solenoid valve is used to
control the flow rate of fuel vapor from the EVAP canister. The EVAP
canister purge volume control solenoid valve is moved by ON/OFF
pulses from the ECM. The longer the ON pulse, the greater the
amount of fuel vapor that will flow through the valve.
Fuel InjectorINFOID:0000000006217672
For the fuel injector, a high pressure fuel injector is used and this
enables a high-pressure fuel injection at a high voltage within a short
time. The ECM is equipped with an injector driver unit and actuates
the fuel injector at a high volt age (approximately 65 V at the maxi-
mum).
Fuel Level SensorINFOID:0000000006217673
The fuel level sensor is mounted in the fuel level sensor unit.
PBIB3370E
PBIB1263E
JMBIA0069ZZ
JSBIA0287ZZ
Revision: 2010 May2011 QX56

ECM
EC-97
< ECU DIAGNOSIS INFORMATION > [VK56VD]
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Priority Detected items (DTC)
1  U0101 CAN communication line  U0113 U1003 CAN communication line
 U1001 CAN communication line
 U1024 VVEL CAN communication line
 P006A P0101 P0102 P0103 Mass air flow sensor
 P010A Manifold absolute pressure sensor
 P0112 P0113 P0127 Intake air temperature sensor
 P0116 P0117 P0118 P0125 Engine coolant temperature sensor
 P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor
 P0128 Thermostat function
 P0181 P0182 P0183 Fuel tank temperature sensor
 P0196 P0197 P0198 Engine oil temperature sensor
 P0327 P0328 P0332 P0333 Knock sensor
 P0335 Crankshaft position sensor
 P0340 P0345 Camshaft position sensor
 P0460 P0461 P0462 P0463 Fuel level sensor
 P0500 Vehicle speed sensor
 P0527 Cooling fan speed sensor
 P0605 P0607 P0611 P062B ECM
 P0643 Sensor power supply
 P0700 TCM
 P0705 P0850 Transmission range switch
 P1089 P1092 P1608 VVEL control shaft position sensor
 P1197 Out of gas*
 P1220 Fuel pump control module (FPCM)
 P1421 P1423 P1424 Cold start control
 P1550 P1551 P1552 P1553 P1554 Battery current sensor
 P1556 P1557 Battery temperature sensor
 P1606 P1607 VVEL control module
 P1610 - P1615 NATS
 P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor
 P2539 P2541 P2542 Low fuel pressure sensor
Revision: 2010 May2011 QX56

ECM
EC-101
< ECU DIAGNOSIS INFORMATION > [VK56VD]
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OP0327 0327 KNOCK SEN/CIRC-B1 — 2 —
EC-297
P0328 0328 KNOCK SEN/CIRC-B1 — 2 —
P0332 0332 KNOCK SEN/CIRC-B2 — 2 —
P0333 0333 KNOCK SEN/CIRC-B2 — 2 —
P0335 0335 CKP SEN/CIRCUIT — 2×EC-299
P0340 0340 CMP SEN/CIRC-B1 — 2 ×
EC-303
P0345 0345 CMP SEN/CIRC-B2 — 2 ×
P0420 0420 TW CATALYST SYS-B1 ×2 ×
EC-307
P0430 0430 TW CATALYST SYS-B2 ×2 ×
P0441 0441 EVAP PURG FLOW/MON ×2 ×EC-312
P0443 0443 PURG VOLUME CONT/V — 2 ×EC-317
P0444 0444 PURG VOLUME CONT/V — 2 ×
EC-322
P0445 0445 PURG VOLUME CONT/V — 2 ×
P0447 0447 VENT CONTROL VALVE — 2 ×EC-325
P0448 0448 VENT CONTROL VALVE — 2 ×EC-329
P0451 0451 EVAP SYS PRES SEN — 2 ×EC-333
P0452 0452 EVAP SYS PRES SEN — 2 ×EC-336
P0453 0453 EVAP SYS PRES SEN — 2 ×EC-341
P0456 0456 EVAP VERY SML LEAK
×*82 ×EC-346
P0460 0460 FUEL LEV SEN SLOSH — 2 ×EC-352
P0461 0461 FUEL LEVEL SENSOR — 2 ×EC-353
P0462 0462 FUEL LEVL SEN/CIRC — 2 ×EC-355
P0463 0463 FUEL LEVL SEN/CIRC — 2 ×EC-355
P0500 0500
VEH SPEED SEN/CIRC*5—2 ×EC-356
P0506 0506 ISC SYSTEM — 2 ×EC-358
P0507 0507 ISC SYSTEM — 2 ×EC-360
P050E 050E COLD START CONTROL — 2 ×EC-362
P0524 0524 ENGINE OIL PRESSURE — 2 ×EC-364
P0527 0527 COOLING FAN SPD SEN — 2 — EC-367
P0550 0550 PW ST P SEN/CIRC — 2 —EC-371
P0603 0603 ECM BACK UP/CIRCUIT — 2×EC-374
P0605 0605 ECM — 1 or 2 × or — EC-376
P0607 0607 ECM — 1 ×EC-378
P0611 0611 FIC MODULE — 2 ×EC-379
P062B 062B ECM — 2 × or — EC-380
P0643 0643 SENSOR POWER/CIRC — 1 ×EC-381
P0705 0705 T/M RANGE SENSOR A — 2 ×TM-106
P0710 0710
FLUID TEMP SENSOR*7—2 ×TM-107
P0717 0717 INPUT SPEED SENSOR A — 2 ×TM-109
P0720 0720
OUTPUT SPEED SENSOR*5—2 ×TM-110
P0729 0729
6GR INCORRECT RATIO*7—2 ×TM-114
P0730 0730 INCORRECT GR RATIO — 2 ×TM-116
DTC*1
Items
(CONSULT-III screen terms) SRT code Trip MIL Reference
page
CONSULT-III
GST*
2ECM*3
Revision: 2010 May2011 QX56

EC-166
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
1. Check for the cause of large engine friction. Refer to the following.
- Engine oil level is too high
- Engine oil viscosity
- Belt tension of power steering, alternat
or, A/C compressor, etc. is excessive
- Noise from engine
- Noise from transmission, etc.
2. Check for the cause of insufficient combustion. Refer to the following.
- Valve clearance malfunction
- Intake valve timing control function malfunction
- Camshaft sprocket installation malfunction, etc.
>> Repair or replace malfunctioning part, and then GO TO 27.
16.CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
 Crushed air ducts
 Malfunctioning seal of air cleaner element
 Uneven dirt of air cleaner element
 Improper specification of intake air system
Is the inspection result normal?
YES >> GO TO 18.
NO >> Repair or replace malfunctioning part, and then GO TO 17.
17.CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2” AND “B/FUEL SCHDL”
Select “A/F ALPHA-B1”, “A/F ALPHA-B2” and “B/FUE L SCHDL” in “SPEC” of “DATA MONITOR” mode, and
check that each indication is within the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> “B/FUEL SCHDL” is more, “A/F ALPHA-B1” and “A /F ALPHA-B2” are less than the SP value: GO
TO 18.
18.DISCONNECT AND RECONNECT MASS AIR FLOW SENSOR HARNESS CONNECTOR
1. Stop the engine.
2. Disconnect mass air flow sensor harness connector. Check pin terminal and connector for damage and then reconnect it again.
>> GO TO 19.
19.CHECK “A/F ALPHA-B1” AND “A/F ALPHA-B2”
1. Start engine.
2. Select “A/F ALPHA-B1” and “A/F ALPHA-B2” in “ SPEC” of “DATA MONITOR” mode, and check that each
indication is within the SP value.
Is the measurement value within the SP value?
YES >> Detect malfunctioning part of mass air flow sensor circuit and repair it. Refer to EC-201, "Diagno-
sis Procedure". Then GO TO 26.
NO >> GO TO 20.
20.CHECK “MAS A/F SE-B1”
Select “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP
value.
Is the measurement value within the SP value?
YES >> GO TO 21.
NO >> More than the SP value: Replace malfuncti oning mass air flow sensor, and then GO TO 26.
21.REPLACE ECM
1. Replace ECM.
2. Perform EC-143, "
Work Procedure".
Revision: 2010 May2011 QX56

TROUBLE DIAGNOSIS - SPECIFICATION VALUEEC-167
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
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>> GO TO 26.
22.CHECK INTAKE SYSTEM
Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.
 Crushed air ducts
 Malfunctioning seal in air cleaner element
 Uneven dirt in air cleaner element
 Improper specification in intake air system
Is the inspection result normal?
YES >> GO TO 24.
NO >> Repair or replace malfunctioning part, and then GO TO 23.
23.CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and check t hat the indication is within the SP
value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Less than the SP value: GO TO 24.
24.CHECK “MAS A/F SE-B1”
Select “MAS A/F SE-B1” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP
value.
Is the measurement value within the SP value?
YES >> GO TO 25.
NO >> Less than the SP value: Replace malfunctioning mass air flow sensor, and then GO TO 27.
25.CHECK INTAKE SYSTEM
Check for the cause of air leakage after the mass air flow sensor. Refer to the following.
 Disconnection, looseness, and cracks in air duct
 Looseness of oil filler cap
 Disconnection of oil level gauge
 Open stuck, breakage, hose disconnection, or cracks in PCV valve
 Disconnection or cracks in EVAP purge hose, stuc k open EVAP canister purge volume control solenoid
valve
 Malfunctioning seal in rocker cover gasket
 Disconnection, looseness, or cracks in hoses, such as a vacuum hose, connecting to intake air system parts
 Malfunctioning seal in intake air system, etc.
>> GO TO 27.
26.CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2” AND “B/FUEL SCHDL”
Select “A/F ALPHA-B1”, “A/F ALPHA-B2” and “B/FUE L SCHDL” in “SPEC” of “DATA MONITOR” mode, and
check that each indication is within the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Detect malfunctioning part according to EC-524, "
Symptom Table".
27.CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and then check that the indication is within
the SP value.
Is the measurement value within the SP value?
YES >> INSPECTION END
NO >> Detect malfunctioning part according to EC-524, "
Symptom Table".
Revision: 2010 May2011 QX56