2006 INFINITI QX56 Factory Service Manual

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Page 1689 of 3383

INFINITI QX56 2006 Factory Service Manual EC-478Revision: November 2009
DTC P1217 ENGINE OVER TEMPERATURE
2006 QX56
Diagnostic ProcedureUBS00H8Y
1. INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >> GO TO 2.
No >> GO TO 3.
2. CHEC

Page 1690 of 3383

INFINITI QX56 2006 Factory Service Manual 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 th

Page 1691 of 3383

INFINITI QX56 2006 Factory Service Manual EC-480Revision: November 2009
DTC P1217 ENGINE OVER TEMPERATURE
2006 QX56
8. CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to EC-481, "
Main 12 Causes of Overheating" .
>> INSPECTION END
P

Page 1692 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P1217 ENGINE OVER TEMPERATUREEC-481
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5. CHECK INTERMITTENT INCIDENT
Perform EC-144, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK

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 mixtureCoolant tester 50 - 50% coolant mixture MA-11, "RECOM-
MENDED FLUIDS AND
LUBRICANTS"
3Coolant levelVisualCoolant up to MAX level
in reservoir tank and radi-
ator filler neck MA-13, "Changing
Engine Coolant"
4Reservoir tank capPressure tester 95 - 125 kPa
(0.97 - 1.28 kg/cm2 , 14 -
18 psi) (Limit) CO-10, "
CHECKING
RESERVOIR CAP"
ON*25Coolant leaksVisual
No leaks CO-10, "CHECKING
COOLING SYSTEM FOR
LEAKS"
ON*26ThermostatTouch the upper and
lower radiator hosesBoth hoses should be hot
CO-21, "THERMOSTAT
AND WATER PIPING"
ON*17Cooling fanCONSULT-IIOperating See trouble diagnosis for
DTC P1217 ( EC-473,
"DTC P1217 ENGINE
OVER TEMPERATURE"
).
OFF 8
Combustion gas leakColor checker chemical
tester 4 Gas analyzer Negative
—
ON*
39Coolant temperature
gaugeVisual Gauge less than 3/4
when driving —
Coolant overflow to
reservoir tankVisual
No overflow during driving
and idling MA-13, "Changing
Engine Coolant"
OFF*410Coolant return from
reservoir tank to radia-
torVisual
Should be initial level in
reservoir tank MA-13, "Changing
Engine Coolant"
OFF 11Cylinder headStraight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping) EM-68, "Inspection After
Disassembly"
12Cylinder block and pis-
tonsVisual
No scuffing on cylinder
walls or piston EM-94, "Inspection After
Disassembly"

Page 1693 of 3383

INFINITI QX56 2006 Factory Service Manual EC-482Revision: November 2009
DTC P1217 ENGINE OVER TEMPERATURE
2006 QX56
Component InspectionUBS00H90
COOLING FAN MOTOR
1. Disconnect cooling fan motor harness connector.
2. Supply cooling fan motor

Page 1694 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P1225 TP SENSOREC-483
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Revision: November 2009 2006 QX56
DTC P1225 TP SENSORPFP:16119
Component DescriptionUBS00H91
Electric throttle control actuator consists of throttle

Page 1695 of 3383

INFINITI QX56 2006 Factory Service Manual EC-484Revision: November 2009
DTC P1225 TP SENSOR
2006 QX56
Diagnostic ProcedureUBS00H94
1. CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct

Page 1696 of 3383

INFINITI QX56 2006 Factory Service Manual DTC P1226 TP SENSOREC-485
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Revision: November 2009 2006 QX56
DTC P1226 TP SENSORPFP:16119
Component DescriptionUBS00H96
Electric throttle control actuator consists of throttle

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