2006 INFINITI QX56 coolant temperature

DTC P1217 ENGINE OVER TEMPERATUREEC-479
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Revision: November 2009 2006 QX56
4. CHECK COOLING SYSTEM FOR LEAK
Apply pressure to the cooling system with a tester, and check if the
pressure drops.
CAUTION:
Higher than the specified pressure may cause radiator damage.
Pressure should not drop.
OK or NG
OK >> GO TO 5.
NG >> Check the following for leak. Refer to CO-10, "
CHECK-
ING COOLING SYSTEM FOR LEAKS" .

Hose

Radiator

Radiator cap

Water pump

Reservoir tank
5. CHECK RESERVOIR TANK CAP
Apply pressure to cap with a tester.
OK or NG
OK >> GO TO 6.
NG >> Replace reservoir tank cap.
6. CHECK THERMOSTAT
1. Check valve seating condition at normal room temperatures. It should seat tightly.
2. Check valve opening temperature and valve lift.
3. Check if valve is closed at 5 °C (9 °F) below valve opening tem-
perature.
For details, refer to CO-21, "
THERMOSTAT AND WATER PIP-
ING" .
OK or NG
OK >> GO TO 7.
NG >> Replace thermostat
7. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-196, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace engine coolant temperature sensor. Testing pressure: 157 kPa (1.6 kg/cm
2 , 23 psi)
PBIC1528E
Reservoir tank cap
relief pressure:
95 - 125 kPa (0.97 - 1.28 kg/cm2
, 14 - 18 psi)
SLC755A
Valve opening temperature: 82 °C (180 °F) [standard]
Valve lift: More than 10.0 mm/95°C
(0.394 in/203 °F)
SLC343

DTC P1217 ENGINE OVER TEMPERATUREEC-481
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Revision: November 2009 2006 QX56
5. CHECK INTERMITTENT INCIDENT
Perform EC-144, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace IPDM E/R. Refer to PG-18, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MOD-
ULE ENGINE ROOM)" .
NG >> Repair or replace harness connectors.
Main 12 Causes of OverheatingUBS00H8Z
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to CO-6, "
OVERHEATING CAUSE ANALYSIS" .
Engine Step Inspection item
EquipmentStandardReference page
OFF 1

Blocked radiator

Blocked condenser

Blocked radiator grille

Blocked bumper

Visual No blocking —
2

Coolant mixture
Coolant tester 50 - 50% coolant mixture MA-11, "RECOM-
MENDED FLUIDS AND
LUBRICANTS"
3
Coolant level
VisualCoolant up to MAX level
in reservoir tank and radi-
ator filler neck MA-13, "Changing
Engine Coolant"
4
Reservoir tank cap
Pressure tester 95 - 125 kPa
(0.97 - 1.28 kg/cm2 , 14 -
18 psi) (Limit) CO-10, "
CHECKING
RESERVOIR CAP"
ON*25
Coolant leaks
Visual
No leaks CO-10, "CHECKING
COOLING SYSTEM FOR
LEAKS"
ON*26
Thermostat
Touch the upper and
lower radiator hosesBoth hoses should be hot
CO-21, "THERMOSTAT
AND WATER PIPING"
ON*17
Cooling fan
CONSULT-IIOperating See trouble diagnosis for
DTC P1217 ( EC-473,
"DTC P1217 ENGINE
OVER TEMPERATURE"
).
OFF 8

Combustion gas leak
Color checker chemical
tester 4 Gas analyzer Negative
—
ON*
39
Coolant temperature
gauge
Visual Gauge less than 3/4
when driving —

Coolant overflow to
reservoir tank
Visual
No overflow during driving
and idling MA-13, "Changing
Engine Coolant"
OFF*410
Coolant return from
reservoir tank to radia-
tor
Visual
Should be initial level in
reservoir tank MA-13, "Changing
Engine Coolant"
OFF 11
Cylinder head
Straight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping) EM-68, "Inspection After
Disassembly"
12
Cylinder block and pis-
tons
Visual
No scuffing on cylinder
walls or piston EM-94, "Inspection After
Disassembly"

SERVICE DATA AND SPECIFICATIONS (SDS)EC-637
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Revision: November 2009 2006 QX56
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-346, "Component Inspection" .
Camshaft Position Sensor (PHASE)UBS00HEI
Refer to EC-353, "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 idle 14.0 - 33.0
At 2,500 rpm 12.0 - 25.0
Supply voltageBattery voltage (11 - 14V)
Output voltage at idle 1.0 - 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) 1.800 - 2.200
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

EM-64Revision: November 2009
CYLINDER HEAD
2006 QX56
Removal and InstallationEBS00RFE
REMOVAL
1. Remove the engine assembly from the vehicle. Refer to EM-74, "Removal and Installation" .
2. Remove the following components and related parts:

Drive belt auto tensioner drive belts and idler pulley. Refer to EM-14, "REMOVAL" .

Thermostat housing and hose. Refer to CO-21, "Removal and Installation" .

Oil pan and oil strainer. Refer to EM-24, "Removal and Installation" .

Fuel tube and fuel injector assembly. Refer to EM-31, "Removal and Installation" .

Intake manifold. Refer to EM-17, "Removal and Installation" .

Ignition coil. Refer to EM-28, "Removal and Installation" .

Rocker cover. Refer to EM-35, "Removal and Installation" .
3. Remove the crankshaft pulley, front cover, oil pump, and timing chain. Refer to EM-37, "
Removal and
Installation" .
4. Remove the camshaft sprockets and camshafts. Refer to EM-46, "
Removal and Installation" .
5. Remove the cylinder head bolts in reverse of order shown.
1. Harness bracket 2. Engine coolant temperature sensor 3. Washer
4. Cylinder head gasket (LH) 5. Cylinder head (RH) 6. Cylinder head bolt
7. Cylinder head gasket (RH) 8. Cylinder head (LH)
KBIA2528E
PBIC0068E

TERMINOLOGYGI-51
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Revision: November 2009 2006 QX56
TERMINOLOGYPFP:00011
SAE J1930 Terminology List EAS001G6
All emission related terms used in this publication in accordance with SAE J1930 are listed. Accordingly, new
terms, new acronyms/abbreviations and old terms are listed in the following chart.
NEW TERMNEW ACRONYM /
ABBREVIATION OLD TERM
Air cleaner ACLAir cleaner
Barometric pressure BARO***
Barometric pressure sensor-BCDD BAROS-BCDD BCDD
Camshaft position CMP***
Camshaft position sensor CMPSCrank angle sensor
Canister ***Canister
Carburetor CARBCarburetor
Charge air cooler CACIntercooler
Closed loop CLClosed loop
Closed throttle position switch CTP switchIdle switch
Clutch pedal position switch CPP switchClutch switch
Continuous fuel injection system CFI system***
Continuous trap oxidizer system CTOX system***
Crankshaft position CKP***
Crankshaft position sensor CKPS***
Data link connector DLC***
Data link connector for CONSULT-II DLC for CONSULT-II Diagnostic connector for CONSULT-II
Diagnostic test mode DTMDiagnostic mode
Diagnostic test mode selector DTM selectorDiagnostic mode selector
Diagnostic test mode I DTM IMode I
Diagnostic test mode II DTM IIMode II
Diagnostic trouble code DTCMalfunction code
Direct fuel injection system DFI system***
Distributor ignition system DI systemIgnition timing control
Early fuel evaporation-mixture heater EFE-mixture heater Mixture heater
Early fuel evaporation system EFE systemMixture heater control
Electrically erasable programmable read
only memory EEPROM
***
Electronic ignition system EI systemIgnition timing control
Engine control EC***
Engine control module ECMECCS control unit
Engine coolant temperature ECTEngine temperature
Engine coolant temperature sensor ECTS Engine temperature sensor
Engine modification EM***
Engine speed RPMEngine speed
Erasable programmable read only memory EPROM ***
Evaporative emission canister EVAP canisterCanister
Evaporative emission system EVAP systemCanister control solenoid valve
Exhaust gas recirculation valve EGR valveEGR valve

IDX-4
ALPHABETICAL INDEX
E
ECM input/output signal ..................... EC-105
, EC-129
ECM power supply ............................. EC-145, EC-453
ECM relay ........................................................ EC-145
ECM/PW - Wiring diagram ............................... EC-454
ECTS - Wiring diagram .................................... EC-194
Electric sunroof .................................................. RF-10
Electric throttle control actuator ......... EC-534, EC-545
Electrical load signal circuit .............................. EC-596
Electrical units location ...................................... PG-65
Electronic ignition (EI) system ........................... EC-26
Engine control circuit diagram ......................... EC-103
Engine control component parts location ........... EC-96
Engine control module (ECM) .......................... EC-457
Engine control system diagram ......................... EC-23
Engine coolant .................................................. CO-10
Engine coolant temperature sensor (ECTS) ... EC-192,
EC-205
Engine fail-safe system ...................................... EC-91
Engine oil ............................................................. LU-7
Engine oil filter replacement ............................. MA-17
Engine oil precautions .......................................... GI-7
Engine oil replacement ..................................... MA-17
Engine removal ................................................. EM-74
Engine room cover ............................................ EM-12
Engine serial number .......................................... GI-49
ETC1 - Wiring diagram .................................... EC-535
ETC2 - Wiring diagram .................................... EC-530
ETC3 - Wiring diagram .................................... EC-541
EVAP canister .................................................... EC-35
EVAP canister purge volume control solenoid valve ....
EC-373
, EC-381
EVAP canister vent control valve ....... EC-388, EC-395
EVAP control system (small leak) diagnosis .. EC-365,
EC-419
, EC-427
EVAP control system pressure sensor .... EC-402, EC-
405, EC-411
EVAP control system purge flow monitoring diagnosis
EC-360
EVAP vapor lines inspection ............................. MA-20
Evaporative emission (EVAP) system ............... EC-32
Evaporator ..................................................... ATC-184
Exhaust manifold .............................................. EM-21
Exhaust system ................................................... EX-3
Exhaust system inspection .................................. EX-3
Expansion valve ............................................. ATC-186
F
F/FOG - Wiring diagram ..................................... LT-71
F/PUMP - Wiring diagram ................................ EC-605
Final drive pre-inspection ................................. FFD-15
Final drive removal and installation .. FFD-12, RFD-13
Flow charts ......................................................... GI-28
Fluid temperature sensor (A/T) ........................ AT-127
Fluids ................................................................ MA-11
Fluorescent leak detector .............................. ATC-187
Fog lamp, front .................................................... LT-69
Fog lamp, front, removal and installation ........... LT-79
Foot lamp ......................................................... LT-135
Freeze frame data ............................... EC-53, EC-118
Front brake solenoid valve ................. AT-143, AT-145
Front bumper ...................................................... EI-13
Front case (Transfer) .......................... TF-149, TF-176
Front combination lamp removal and installation LT-31
Front door ............................. BL-128, BL-131, GW-65
Front Door Trim ................................................... EI-32
Front drive shaft (Transfer) ................. TF-149, TF-176
Front fog lamp .................................................... LT-69
Front fog lamp removal and installation ............. LT-79
Front passenger air bag .................................. SRS-50
Front seat ........................................................... SE-91
Front seat belt ...................................................... SB-3
Front seat belt pre-tensioner ............... SRS-3, SRS-57
Front washer ...................................................... WW-4
Front wiper ......................................................... WW-4
FTS - Wiring diagram ....................................... AT-128
FTTS - Wiring diagram ...................... EC-311, EC-316
Fuel cut control (at no load high engine speed) EC-27
Fuel filter replacement ......................................... FL-6
Fuel gauge ............................................................ DI-5
Fuel injection system (Bank 1) .......... EC-288, EC-299
Fuel injection system (Bank 2) .......... EC-288, EC-299
Fuel injector .................................................... EC-598
Fuel injector and fuel tube ................................. EM-31
Fuel level sensor ................. EC-436, EC-438, EC-440
Fuel line inspection .............................................. FL-4
Fuel precautions ................................................... GI-5
Fuel pressure check .......................................... EC-80
Fuel pressure release ....................................... EC-80
Fuel pump ....................................................... EC-604
Fuel pump and gauge .......................................... FL-6
Fuel system .......................................................... FL-4
Fuel tank ............................................................ FL-10
Fuel tank temperature sensor ........... EC-309, EC-315
Fuel tank vacuum relief valve ........................... EC-35
FUELB1 - Wiring diagram ................. EC-290, EC-301
FUELB2 - Wiring diagram ................. EC-292, EC-303
Fuse ...................................................... PG-17, PG-77
Fuse and fusible link box .................................. PG-77
Fuse block ......................................................... PG-76
Fusible link ............................................ PG-17, PG-77
G
Garage jack and safety stand ............................. GI-41
Gauges ................................................................. DI-5
Generator .......................................................... SC-17
Generic scan tool (GST) ................................. EC-127
Glass ...................................... GW-11, GW-65, GW-68
Glove box lamp ................................................ LT-158
GPS antenna ..................................................... AV-85
Grease .............................................................. MA-11
Ground distribution ............................................ PG-31

LAN-32
[CAN]
CAN COMMUNICATION
Revision: November 20092006 QX56

Ty p e 2
Input/output signal chart
T: Transmit R: Receive
PKIC3015E
SignalsECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor Front air control
ABS actuator and electric unit (control unit) IPDM E/R
A/C compressor request signal T R
Accelerator pedal position signal T RR R
ASCD CRUISE lamp signal TR
ASCD OD cancel request signal T R
ASCD operation signal T R
ASCD SET lamp signal TR
Battery voltage signal T R
Closed throttle position signal T R R
Cooling fan speed request signal T R
Engine coolant temperature signal TRR
Engine speed signal T RRR R R R
Engine status signal TR
Fuel consumption monitor signal TR
TR
ICC steering switch signal TR
Malfunction indicator lamp signal TR
Wide open throttle position signal T R
A/T CHECK indicator lamp signal TR

LAN-36
[CAN]
CAN COMMUNICATION
Revision: November 20092006 QX56
ASCD CRUISE lamp signalTR
ASCD OD cancel request signal T R
ASCD operation signal T R
ASCD SET lamp signal TR
Battery voltage signal T R
Closed throttle position signal T R R
Cooling fan speed request signal T R
Engine coolant temperature signal TRR
Engine speed signal T RRR R R R R
Engine status signal TR
Fuel consumption monitor signal TR
TR
ICC steering switch signal TR
Malfunction indicator lamp signal TR
Wide open throttle position signal T R
A/T CHECK indicator lamp signal TR
A/T fluid temperature sensor signal TR
A/T position indicator lamp signal TR R R
A/T self-diagnosis signal R T
Current gear position signal TR R
Output shaft revolution signal R TR R
P range signal TR R R
Turbine revolution signal R TR
ICC sensor signal T R
Buzzer output signal TR
RT
ICC OD cancel request signal R RT
ICC operation signal R RT
ICC system display signal TR
System setting signal TR
RT
1st position switch signal RT
4th position switch signal RT
Distance to empty signal T R
Signals
ECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor Front air control
Transfer control unit
ABS actuator and electric unit (control unit) IPDM E/R