2014 NISSAN TEANA engine overheat

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ENGINE
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CONTENTS
ENGINE COOLING SYSTEM
QR25DE
PRECAUTION ................ ...............................
3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution for Liquid Gasket .....................................3
PREPARATION ............................................5
PREPARATION .............................................. .....5
Special Service Tool ........................................... ......5
Commercial Service Tool ..........................................5
SYSTEM DESCRIPTION ..............................7
COOLING SYSTEM ....................................... .....7
Cooling Circuit ..................................................... ......7
Schematic .................................................................8
OVERHEATING CAUSE ANALYSIS ..................9
Troubleshooting Chart ...............................................9
PERIODIC MAINTENANCE .........................11
ENGINE COOLANT ....................................... ....11
System Inspection ............................................... ....11
Changing Engine Coolant .......................................12
REMOVAL AND INSTALLATION ...............16
RADIATOR ..................................................... ....16
Exploded View .................................................... ....16
Removal and Installation .........................................17
Inspection ............................................................ ....17
COOLING FAN ...................................................18
Exploded View .................................................... ....18
Removal and Installation .........................................18
WATER PUMP ............................................... ....20
Exploded View ..................................................... ....20
Removal and Installation .........................................20
THERMOSTAT AND THERMOSTAT HOUS-
ING ....................................................................
22
Exploded View ..................................................... ....22
Removal and Installation .........................................22
WATER OUTLET AND WATER PIPING ..........24
Exploded View .........................................................24
Removal and Installation .........................................24
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .............................................
26
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
26
Capacity ............................................................... ....26
Thermostat ..............................................................26
Radiator ...................................................................26
VQ35DE
PRECAUTION ...... ........................................
27
PRECAUTIONS .................................................27
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
27
Precaution for Liquid Gasket ...................................27
PREPARATION ...........................................29
PREPARATION .................................................29
Special Service Tool ............................................ ....29
Commercial Service Tool ........................................29
SYSTEM DESCRIPTION .............................31
COOLING SYSTEM ..........................................31
Cooling Circuit ..................................................... ....31
Schematic ................................................................32
Revision: November 20132014 Altima NAM

CO-2
OVERHEATING CAUSE ANALYSIS ................33
Troubleshooting Chart ......................................... ...33
PERIODIC MAINTENANCE ..................... ...35
ENGINE COOLANT ........................................ ...35
System Inspection ............................................... ...35
Changing Engine Coolant .......................................36
REMOVAL AND INSTALLATION ...............40
RADIATOR ..................................................... ...40
Exploded View ..................................................... ...40
Removal and Installation ........................................41
Inspection ...............................................................41
COOLING FAN ..................................................42
Exploded View ..................................................... ...42
Removal and Installation ........................................42
WATER PUMP ...................................................44
Exploded View ..................................................... ...44
Removal and Installation .........................................44
THERMOSTAT AND THERMOSTAT HOUS-
ING .................................................................. ...
49
Exploded View ..................................................... ...49
Removal and Installation .........................................49
WATER OUTLET AND WATER PIPING ....... ...51
Exploded View ..................................................... ...51
Removal and Installation .........................................51
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... ...........................................
53
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
53
Capacity ............................................................... ...53
Thermostat ..............................................................53
Radiator ..................................................................53
Revision: November 20132014 Altima NAM

OVERHEATING CAUSE ANALYSISCO-9
< SYSTEM DESCRIPTION > [QR25DE]
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OVERHEATING CAUSE ANALYSIS
Troubleshooting ChartINFOID:0000000009460389
Symptom Check items
Cooling sys-
tem parts
malfunction Poor heat transfer
Water pump malfunction Worn or loose drive belt
—
Thermostat stuck closed Coolant circulation
Damaged fins Dust contamination or rock
clogging
Mechanical damage
Clogged radiator cooling
tube Excess foreign material
(rust, dirt, sand, etc.)
Reduced air flow Cooling fan does not oper-
ate
Engine cooling fans —
High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud — Radiator shroud —
Improper coolant mixture
ratio — Coolant viscosity —
Poor coolant quality — Periodic maintenance —
Insufficient coolant Coolant leaks Cooling hose
Loose clamp
Cracked hose
Water pump Poor sealing
Radiator cap Loose
Poor sealing
Radiator O-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tank Exhaust gas leaks into cool-
ing system Cylinder head deterioration
Cylinder head gasket deteri-
oration
Revision: November 20132014 Altima NAM

CO-10
< SYSTEM DESCRIPTION >[QR25DE]
OVERHEATING CAUSE ANALYSIS
Except cool-
ing system
parts mal-
function — Overload on engine
Abusive driving
High engine rpm under no
load
Driving in low gear for ex-
tended time
Driving at extremely high
speed
Powertrain sy stem malfunc-
tion
—
Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flow Blocked radiator grille Installed car brassiere
—
Mud contamination or paper
clogging
Blocked bumper
Blocked radiator
Blocked condenser
Installed large fog lamp
Symptom Check items
Revision: November 20132014 Altima NAM

CO-34
< SYSTEM DESCRIPTION >[VQ35DE]
OVERHEATING CAUSE ANALYSIS
Except cool-
ing system
parts mal-
function — Overload on engine
Abusive driving
High engine rpm under no
load
Driving in low gear for ex-
tended time
Driving at extremely high
speed
Powertrain sy stem malfunc-
tion
—
Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flow Blocked bumper Blocked air flow
—
Blocked radiator grille
Installed car brassiere
Mud contamination or paper
clogging
Blocked radiator Blocked air flow
Blocked condenser
Installed large fog lamp
Symptom Check items
Revision: November 20132014 Altima NAM

EC-86
< SYSTEM DESCRIPTION >[QR25DE]
DIAGNOSIS SYSTEM (ECM)
*: Leaving cooling fan OFF with CONSULT while engine is running may cause the engine to overheat.
DTC WORK SUPPORT MODE
DTC WORK SUPPORT Mode
ALTERNATOR
DUTY • Engine: Idle
• Change duty ratio using CON-
SULT. Battery voltage changes.
• Harness and connectors
•IPDM E/R
•Alternator
FUEL PUMP RELAY • Ignition switch: ON (Engine
stopped)
• Turn the fuel pump relay “ON”
and “OFF” using CONSULT and
listen to operating sound. Fuel pump relay makes the operat-
ing sound. • Harness and connectors
• Fuel pump relay
VIAS S/V-1 • Ignition switch: ON
• Turn intake manifold tuning valve
“ON” and “OFF” using CONSULT
and listen to operating sound. Intake manifold tuning valve motor
makes an operating sound. • Harness and connectors
• Intake manifold tuning valve mo- tor
TUMBLE CONTROL
VA LV E • Ignition switch: ON
• Turn intake manifold runner con-
trol valve “ON” and “OFF” using
CONSULT and listen to operating
sound. Intake Manifold Runner control
valve motor makes an operating
sound. • Harness and connectors
• Intake Manifold Runner control valve motor
IGNITION TIMING • Engine: Return to the original
trouble condition
• Timing light: Set
• Retard the ignition timing using
CONSULT. If trouble symptom disappears, see
CHECK ITEM. • Perform Idle Air Volume Learn-
ing.
POWER BALANCE • Engine: After warming up, idle the
engine.
• A/C switch OFF
• Selector lever: P or N
• Cut off each fuel injector signal one at a time using CONSULT. Engine runs rough or stops. • Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil
VENT CONTROL/V • Ignition switch: ON (Engine
stopped)
• Turn solenoid valve “ON” and “OFF” using CONSULT and listen
to operating sound. Solenoid valve makes an operating
sound. • Harness and connectors
• Solenoid valve
INT V/T ASSIGN AN-
GLE • Engine: Return to the original
trouble condition
• Change intake valve timing using
CONSULT. If trouble symptom disappears, see
CHECK ITEM. • Harness and connectors
• Intake valve timing control sole- noid valve
EXH V/T ASSIGN
ANGLE • Engine: Return to the original
trouble condition
• Change exhaust valve timing us- ing CONSULT. If trouble symptom disappears, see
CHECK ITEM. • Harness and connectors
• Exhaust valve timing control so-
lenoid valve
COOLING FAN* • Ignition switch: ON
• Turn the cooling fan “LOW”, “HI” and “OFF” using CONSULT. Cooling fan moves and stops. • Harness and connectors
• IPDM E/R (Cooling fan relay)
• Cooling fan motor
Test item Condition Judgment Check item (Remedy)
Test mode Test item Corresponding DTC No. Reference page
EVAPORATIVE SYSTEM PURG FLOW P0441 P0441
EC-337
PURG VOL CN/V P1444 P0443EC-342
A/F SEN1 A/F SEN1(B1) P1276 P0130 EC-258
HO2S2HO2S2(B1) P1146 P0138
EC-274HO2S2(B1) P1147 P0137EC-268
HO2S2(B1) P0139 P0139EC-282
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

ECM
EC-105
< ECU DIAGNOSIS INFORMATION > [QR25DE]
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DTC IndexINFOID:0000000009462124
×
:Applicable —: Not applicable
2 P0031, P0032 Air fuel ratio (A/F) sensor 1 heater
P0037, P0038 Heated oxygen sensor 2 heater
P0075 Intake valve timing control solenoid valve/Intake valve timing
intermediate lock control solenoid valve
P0078 Exhaust valve timing control solenoid valve
P0130, P0131, P0132, P014 C, P014D, P015A, P015B,
P117A, P2096, P2097 Air fuel ratio (A/F) sensor 1
P0137, P0138, P0139 Heated oxygen sensor 2
P0441 EVAP control system purge flow monitoring
P0443, P0444, P0445 EVAP canister purge volume control solenoid valve
P0447, P0448 EVAP canister vent control valve
P0451, P0452, P0453 EVAP control system pressure sensor
P1217 Engine over temperature (OVERHEAT)
P1800 Intake manifold tuning valve
P1805 Brake switch
P2004 Intake manifold runner control valve
P2100, P2103 Throttle control motor relay
P2101 Electric thrott le control function
P2118 Throttle control motor
3 P0011, P052A, P052B Intake valve timing control
P0014 Exhaust valve timing control
P0171, P0172 Fuel injection system function
P0300, P0301, P0302, P0303, P0304 Misfire
P0420 Three way catalyst function
P0456 EVAP control system
P0506, P0507 Idle speed control system
P050A, P050B, P050E Cold start control
P0524 Engine oil pressure
P1148 Closed loop control
P1212 TCS communication line
P1564 ASCD steering switch
P1572 ASCD brake switch
P1574 ASCD vehicle speed sensor
P1715 Input speed sensor
P2119 Electric throttle control actuator
Priority DTC Detected items
DTC*1
Items
(CONSULT screen terms) SRT
code Trip MIL Permanent
DTC group*4Reference page
CONSULT
GST
*2ECM*3
U0101 0101*5CAN COMM CIRCUIT — 1 ×BEC-207
U1001
1001*5CAN COMM CIRCUIT — 2 — — EC-208
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0125 ECT SENSOREC-251
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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P0125 ECT SENSOR
DTC LogicINFOID:0000000009462204
DTC DETECTION LOGIC
NOTE:
• If DTC P0125 is displayed with P0 116, first perform the trouble diagnosis for DTC P0116. Refer to EC-
243, "DTC Logic".
• If DTC P0125 is displayed with P0117 or P0118, fi rst perform the trouble diagnosis for DTC P0117 or
P0118. Refer to EC-245, "DTC Logic"
.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.CHECK ENGINE COOLANT TEMPERATURE SENSOR FUNCTION
With CONSULT
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode of “ENGINE” using CONSULT.
3. Check that “COOLAN TEMP/S” is above 10 °C (50 °F).
With GST
Follow the procedure “With CONSULT” above.
Is it above 5
°C (41°F)?
YES >> INSPECTION END
NO >> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Start engine and run it for 65 minutes at idle speed.
2. Check 1st tip DTC.
If “COOLAN TEMP/S” indicatio n increases to more than 10°C (50 °F) within 65 minutes, stop engine
because the test resu lt will be OK.
CAUTION:
Be careful not to overheat engine.
With GST
Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected?
YES >> Proceed to EC-251, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000009462205
1.CHECK ENGINE COOLANT TEMPERATURE SENSOR
DTC No. CONSULT screen terms
(Trouble diagnosis content) DTC detecting condition Possible cause
P0125 ECT SENSOR
(Insufficient coolant tempera-
ture for closed loop fuel control) • Voltage sent to ECM from the sensor is not
practical, even when some time has
passed after starting the engine.
• Engine coolant temperature is insufficient
for closed loop fuel control. • Harness or connectors
(High resistance in the circuit)
• Engine coolant temperature sensor
•Thermostat
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM