2006 INFINITI M35 coolant reservoir

EC-522
[VQ35DE]
DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2006 January2006 M35/M45
17. DETECT MALFUNCTIONING PART
Check the following.
10A fuse
Fuse block (J/B) connector E102
50A fusible link
Harness for open or short between cooling fan relay and fuse
Harness for open or short between cooling fan relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
18. CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E9.
3. Check harness continuity between the following;
Cooling fan relay terminal 2 and IPDM E/R terminal 56,
Cooling fan relay terminal 5 and cooling fan control module terminal 3.
Refer to wiring diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 19.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
19. CHECK COOLING FAN RELAY
Refer to EC-524, "
Component Inspection" .
OK or NG
OK >> GO TO 20.
NG >> Replace cooling fan relay.
20. CHECK INTERMITTENT INCIDENT
Perform EC-165, "
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 OverheatingNBS00538
Continuity should exist.
Engine Step Inspection item Equipment Standard Reference page
OFF 1
Blocked radiator
Blocked condenser
Blocked radiator grille
Blocked bumper
Visual No blocking —
2
Coolant mixtureCoolant tester 50 - 50% coolant mixtureMA-13, "Anti-Freeze
Coolant Mixture Ratio"
3Coolant levelVisual Coolant up to MAX level
in reservoir tank and radi-
ator filler neckMA-15, "Changing
Engine Coolant"
4Radiator capPressure tester 59 - 98 kPa
(0.6 - 1.0 kg/cm2 , 9 - 14
psi) (Limit)CO-16, "
Checking Radia-
tor Cap"

DTC P1217 ENGINE OVER TEMPERATURE
EC-523
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EC
Revision: 2006 January2006 M35/M45
*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-7, "
OVERHEATING CAUSE ANALYSIS" . ON*
25Coolant leaksVisual No leaksCO-11, "LEAK CHECK"
ON*26ThermostatTouch the upper and
lower radiator hosesBoth hoses should be hotCO-29, "WATER INLET
AND THERMOSTAT
ASSEMBLY"
ON*17Cooling fanCONSULT-II Operating See trouble diagnosis for
DTC P1217 (EC-512
).
OFF 8
Combustion gas leakColor checker chemical
tester 4 Gas analyzerNegative —
ON*
39Coolant temperature
gaugeVisual Gauge less than 3/4
when driving—
Coolant overflow to
reservoir tankVisual No overflow during driving
and idlingMA-15, "Changing
Engine Coolant"
OFF*410Coolant return from
reservoir tank to radia-
torVisual Should be initial level in
reservoir tankMA-15, "Changing
Engine Coolant"
OFF 11Cylinder headStraight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping)EM-101, "CYLINDER
HEAD"
12Cylinder block and pis-
tonsVisual No scuffing on cylinder
walls or pistonEM-123, "CYLINDER
BLOCK"
Engine Step Inspection item Equipment Standard Reference page

DTC P1217 ENGINE OVER TEMPERATURE
EC-1241
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EC
Revision: 2006 January2006 M35/M45
WITH CONSULT-II
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
3. Turn ignition switch ON.
4. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with
CONSULT-II.
5. Make sure that cooling fan speed varies according to the per-
cent.
6. If the results are NG, go to EC-1244, "
Diagnostic Procedure" .
WITH GST
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-1244,
"Diagnostic Procedure" .
3. Perform IPDM E/R auto active test and check cooling fan motors
operation, refer to PG-24, "
Auto Active Test" .
4. If NG, go to EC-1244, "
Diagnostic Procedure" .
SEF621W
PBIB2737E
SEF621W

DTC P1217 ENGINE OVER TEMPERATURE
EC-1249
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Revision: 2006 January2006 M35/M45
19. CHECK INTERMITTENT INCIDENT
Perform EC-878, "
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 13 Causes of OverheatingNBS005KW
*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-36, "
OVERHEATING CAUSE ANALYSIS" .
Component InspectionNBS005KX
COOLING FAN MOTORS -1 AND -2
Models With Sub Harneess
1. Disconnect cooling fan motor harness connector.
Engine Step Inspection item Equipment Standard Reference page
OFF 1
Blocked radiator
Blocked condenser
Blocked radiator grille
Blocked bumper
Visual No blocking —
2
Coolant mixtureCoolant tester 50 - 50% coolant mixtureMA-13
3Coolant levelVisual Coolant up to MAX level
in reservoir tank and radi-
ator filler neckCO-40
4Radiator capPressure tester 59 - 98 kPa
(0.6 - 1.0 kg/cm2 , 9 - 14
psi) (Limit)CO-45
ON*25Coolant leaksVisual No leaksCO-40
ON*26ThermostatTouch the upper and
lower radiator hosesBoth hoses should be hotCO-55
ON*17Cooling fanCONSULT-II Operating See trouble diagnosis for
DTC P1217 (EC-1239
).
OFF 8
Combustion gas leakColor checker chemical
tester 4 Gas analyzerNegative —
ON*
39Coolant temperature
gaugeVisual Gauge less than 3/4
when driving—
Coolant overflow to
reservoir tankVisual No overflow during driving
and idlingCO-40
OFF*410Coolant return from
reservoir tank to radia-
torVisual Should be initial level in
reservoir tankCO-40
OFF 11Water control valveRemove and inspect
the valveWithin the specified valueCO-55
OFF 12Cylinder headStraight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping)EM-233
13Cylinder block and pis-
tonsVisual No scuffing on cylinder
walls or pistonEM-249

EM-14
[VQ35DE]
ENGINE ROOM COVER
Revision: 2006 January2006 M35/M45
ENGINE ROOM COVERPFP:14049
ComponentsNBS004MS
Removal and InstallationNBS004MT
REMOVAL
CAUTION:
Do not damage or scratch cover when installing or removing.
Refer to EM-19, "INTAKE MANIFOLD COLLECTOR" for removal and installation of engine cover.
Refer to EM-17, "AIR CLEANER AND AIR DUCT" for removal and installation of air duct (inlet).
Remove the washer tank cap before removing the engine room cover (RH).
Remove the engine room covers (RH and LH) by lifting the clipped point using a clip driver.
Major parts and inspection points under each cover are as follows; (numbered as in figure)
1. Upper side of engine assembly
2. Battery, relay box
3. Power steering fluid reservoir tank, engine coolant reservoir tank, relay box
4. Engine assembly front side, drive belts, cooling fan
5. Mass air flow sensor, air cleaner case
6. Brake master cylinder, brake booster
INSTALLATION
Installation is the reverse order of removal.
1. Engine cover 2. Battery cover 3. Engine room cover (RH)
4. Air duct (inlet) 5. Engine room cover (LH) 6. Brake master cylinder cover
A. Clip (secure at back surface)
PBIC3824E

EM-114
[VQ35DE]
ENGINE ASSEMBLY
Revision: 2006 January2006 M35/M45
REMOVAL
Outline
At first, remove the engine and the transmission assembly with front suspension member from vehicle down-
ward. Then separate the engine from transmission.
Preparation
1. Release fuel pressure. Refer to EC-98, "FUEL PRESSURE RELEASE" .
2. Drain engine coolant from radiator. Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:
Perform this step when engine is cold.
Do not spill engine coolant on drive belts.
3. Disconnect both battery cables. Refer to SC-4, "
BATTERY" .
4. Remove the following parts:
Engine room cover (RH and LH); Refer toEM-14, "ENGINE ROOM COVER" .
Engine cover; Refer to EM-19, "INTAKE MANIFOLD COLLECTOR" .
Front road wheel and tires (power tool)
Front and rear engine undercover (power tool)
Cowl top cover (RH); Refer to EI-18, "COWL TOP" .
Air duct and air cleaner case assembly; EM-17, "AIR CLEANER AND AIR DUCT" .
5. Discharge refrigerant from A/C circuit. Refer to ATC-151, "
REFRIGERANT LINES" .
6. Remove radiator hoses (upper and lower). Refer to CO-14, "
RADIATOR" .
Engine Room LH
1. Disconnect heater hose from vehicle-side, and fit a plug onto hose end to prevent engine coolant leak.
2. Disconnect wire bonding (between vehicle to left bank cylinder head).
3. Disconnect A/C piping from A/C compressor, and temporarily fasten it on vehicle with a rope. Refer to
AT C - 1 5 1 , "
REFRIGERANT LINES" .
4. Disconnect brake booster vacuum hose.
Engine Room RH
1. Disconnect battery positive cable at vehicle side and temporarily fasten it on engine.
2. Disconnect grounding cable.
3. Disconnect fuel feed hose (with damper) and EVAP hose. Refer to EM-45, "
FUEL INJECTOR AND FUEL
TUBE" .
CAUTION:
Fit plugs onto disconnected hoses to prevent fuel leak.
4. Remove reservoir tank of power steering oil pump and piping from vehicle, and temporarily secure them
on engine. Refer to PS-29, "
POWER STEERING OIL PUMP" .
CAUTION:
When temporarily securing, keep the reservoir tank upright to avoid a fluid leak.
Vehicle inside
Follow procedure below to disconnect engine room harness connectors at passenger room side, and tempo-
rarily secure them on engine.
1. Remove passenger-side kicking plate, dash side finisher, and glove box. Refer to EI-37, "
BODY SIDE
TRIM" and IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Disconnect engine room harness connectors at unit sides TCM, ECM and other.
3. Disengage intermediate fixing point. Pull out engine room harnesses to engine room side, and temporarily
secure them on engine.
CAUTION:
When pulling out harnesses, take care not to damage harnesses and connectors.
After temporarily securing, cover connectors with vinyl or similar material to protect against for-
eign material adhesion.

ENGINE ASSEMBLY
EM-119
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Revision: 2006 January2006 M35/M45
If items or work required are not covered by the engine section, refer to the applicable sections.
Always use the support point specified for lifting.
Use either 2-pole lift type or separate type lift as best you can. If board-on type is used for
unavoidable reasons, support at rear axle jacking point with transmission jack or similar tool
before starting work, in preparation for the backward shift of center of gravity.
For supporting points for lifting and jacking point at rear axle, refer to GI-42, "Garage Jack and
Safety Stand and 2-Pole Lift" .
REMOVAL
Outline
At first, remove the engine, the transmission assembly, the transfer assembly and the front final drive assem-
bly with front suspension member from vehicle downward. Then separate the engine, the transmission assem-
bly, the transfer and the front final drive assembly.
Preparation
1. Release fuel pressure. Refer to EC-98, "FUEL PRESSURE RELEASE" .
2. Drain engine coolant from radiator. Refer to CO-11, "
Changing Engine Coolant" .
CAUTION:
Perform this step when engine is cold.
Do not spill engine coolant on drive belts.
3. Disconnect both battery terminals. Refer to SC-4, "
BATTERY" .
4. Remove the following parts:
Engine room cover (RH and LH); Refer to EM-14, "ENGINE ROOM COVER" .
Engine cover; Refer to EM-19, "INTAKE MANIFOLD COLLECTOR" .
Front road wheel and tires (power tool)
Front and rear engine undercover (power tool)
Front cross bar; Refer to FSU-23, "FRONT SUSPENSION ASSEMBLY" .
Cowl top cover (RH); Refer to EI-18, "COWL TOP" .
Air duct and air cleaner case assembly; EM-17, "AIR CLEANER AND AIR DUCT" .
5. Discharge refrigerant from A/C circuit. Refer to ATC-151, "
REFRIGERANT LINES" .
6. Remove radiator hoses (upper and lower). Refer to CO-14, "
RADIATOR" .
Engine Room LH
1. Disconnect heater hose from vehicle-side, and fit a plug onto hose end to prevent engine coolant leak.
2. Disconnect wire bonding (between vehicle to left bank cylinder head).
3. Disconnect A/C piping from A/C compressor, and temporarily fasten it on vehicle with a rope. Refer to
AT C - 1 5 1 , "
REFRIGERANT LINES" .
4. Disconnect brake booster vacuum hose.
Engine Room RH
1. Disconnect battery positive cable vehicle side and temporarily fasten it on engine.
2. Disconnect grounding cables.
3. Disconnect fuel feed hose (with damper) and EVAP hose. Refer to EM-45, "
FUEL INJECTOR AND FUEL
TUBE" .
CAUTION:
Fit plugs onto disconnected hoses to prevent fuel leak.
4. Remove reservoir tank of power steering oil pump and piping from vehicle, and temporarily secure them
on engine. Refer to PS-29, "
POWER STEERING OIL PUMP" .
CAUTION:
When temporarily securing, keep the reservoir tank upright to avoid a fluid leak.
Vehicle inSide
Follow procedure below to disconnect engine room harness connectors at passenger room side, and tempo-
rarily secure them on engine.

ENGINE ROOM COVER
EM-173
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Revision: 2006 January2006 M35/M45
ENGINE ROOM COVERPFP:14049
ComponentsNBS004OI
Removal and InstallationNBS004OJ
REMOVAL
CAUTION:
Do not damage or scratch cover when installing or removing.
Refer to EM-179, "INTAKE MANIFOLD" for removal and installation of engine cover.
Refer to EM-177, "AIR CLEANER AND AIR DUCT" for removal and installation of air duct (inlet).
Remove the washer tank cap before removing the engine room cover (RH).
Remove the engine room covers (RH and LH) by lifting the clipped point using a clip driver.
Major parts and inspection points under each cover are as follows; (numbered as in the figure)
1. Upper side of engine assembly
2. Battery, relay box
3. Power steering fluid reservoir tank, engine coolant reservoir tank, relay box
4. Engine assembly front side, drive belts, cooling fan
5. Mass air flow sensor, air cleaner case
6. Brake master cylinder, brake booster
INSTALLATION
Installation is the reverse order of removal.
1. Engine cover 2. Battery cover 3. Engine room cover (RH)
4. Air duct (inlet) 5. Engine room cover (LH) 6. Brake master cylinder cover
A. Clip (secure at back surface)
PBIC3294E