2014 NISSAN TEANA heating

CO-50
< REMOVAL AND INSTALLATION >[VQ35DE]
THERMOSTAT AND THERMOSTAT HOUSING
8. Remove engine coolant inlet, thermostat assembly and gasket.
•Do not disassemble engine cool ant inlet and thermostat.
Replace them as a unit, if necessary.
• Do not reuse gasket.
INSPECTION AFTER REMOVAL
• Place a thread so that it is caught in the valves of the thermostat.
Immerse fully in a container filled with water. Heat while stirring.
• The valve opening temperature is the temperature at which the
valve opens and the thermostat falls from the thread.
• Continue heating. Check the full-open lift amount. NOTE:
The full-open lift amount standard temperature for the thermostat is
the reference value.
• After checking the full-open lift amount, lower the water tempera-
ture and check the valve closing temperature.
• If valve setting at measured values are out of standard range, replace thermostat.
INSTALLATION
Installation is in the reverse order of removal.
• Install thermostat with jiggle valve facing upward.
• After installation refill engine coolant and check for leaks. Refer to
CO-36, "Changing Engine Coolant"
and CO-35, "System Inspec-
tion".
CAUTION:
• Do not spill coolant in engi ne compartment. Use a shop
cloth to absorb coolant.
• Do not reuse gasket.
SLC962AA
SLC949A
Thermostat Standard Values
Valve opening temperature Refer to CO-53, "Thermostat"
Full-open lift amount Refer to CO-53, "Thermostat"
Valve closing temperature Refer to CO-53, "Thermostat"
SLC948A
Revision: November 20132014 Altima NAM

DEF-6
< SYSTEM DESCRIPTION >
COMPONENT PARTS
Component Description
INFOID:0000000009463023
1: With auto A/C
2: With manual A/C
3: With heated mirrors Component Description
BCM • Operates the rear window defogger with the operation of rear window defogger switch.
• Performs the timer control of rear window defogger.
Rear window defogger relay • Operates the rear window defogger and the door mirror defogger with the control signal from
BCM.
A/C auto amp
1• Displays the rear window defogger ON to the display when detecting the operation of the rear window defogger.
A/C switch assembly
1 (rear
window defogger switch) • The rear window defogger switch is turned ON.
Front air control
2 (rear window
defogger switch) • The rear window defogger switch is turned ON.
• Turns the indicator lamp ON when detecting the operation of rear window defogger.
Rear window defogger • Heats the heating wire with the power supply from the rear window defogger relay to prevent
the rear window from fogging up.
Door mirror defogger
3• Heats the heating wire with the power supply from the rear window defogger relay to prevent the door mirror from fogging up.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DEF-28
< DTC/CIRCUIT DIAGNOSIS >
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
REAR WINDOW DEFOGGER POWER SUPPLY AND GROUND CIRCUIT
DescriptionINFOID:0000000009463041
Heats the heating wire with the power supply from the rear window defogger relay to prevent the rear window
from fogging up.
Component Function CheckINFOID:0000000009463042
1. CHECK REAR WINDOW DEFOGGER
Check that the heating wire of rear window defogger is heated when turning the rear window defogger switch
ON.
Is the inspection result normal?
YES >> Rear window defogger is OK.
NO >> Refer to DEF-28, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000009463043
Regarding Wiring Diagram information, refer to DEF-11, "Wiring Diagram".
1. CHECK FUSES
Check if any of the following fuses in fuse block (J/B) are blown.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit.
2. CHECK REAR WINDOW DEFOGGER POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between fuse block (J/B) connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Perform rear window defogger diagnosis. Refer to DEF-26, "Diagnosis Procedure"
.
3. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between rear window defogger connector and ground.
COMPONENT PARTS AMPERE FUSE NO.
Fuse block (J/B) 15A 23
15A 24
(+) (–) Condition Voltage (V)
(Approx.)
Fuse block (J/B)
Connector Terminal
B13 3T, 5T Ground Rear window de-
fogger switch ON Battery voltage
OFF 0
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DEF-30
< DTC/CIRCUIT DIAGNOSIS >
DRIVER SIDE DOOR MIRROR DEFOGGER
DRIVER SIDE DOOR MIRROR DEFOGGER
DescriptionINFOID:0000000009463045
Heats the heating wire with the power supply from the rear window defogger relay to prevent the door mirror
from fogging up.
Component Function CheckINFOID:0000000009463046
1. CHECK DOOR MIRROR DEFOGGER LH
Check that heating wire of door mirror defogger LH is heated when turning the rear window defogger switch
ON.
Is the inspection result normal?
YES >> Door mirror defogger is OK.
NO >> Refer to DEF-30, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000009463047
Regarding Wiring Diagram information, refer to DEF-11, "Wiring Diagram".
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door mirror LH.
3. Turn ignition switch ON.
4. Check voltage between door mirror LH connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace harness.
2. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between door mirror LH connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3. CHECK DOOR MIRROR DEFOGGER LH
Check door mirror defogger LH.
Refer to DEF-31, "Component Inspection"
.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace door mirror. Refer to MIR-20, "Removal and Installation"
.
(+)
(–) Condition Voltage (V)
(Approx.)
Door mirror LH
Connector Terminal
D4 1 Ground Rear window de-
fogger switch ON Battery voltage
OFF 0
Door mirror LH GroundContinuity
Connector Terminal
D4 5 Yes
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DEF-32
< DTC/CIRCUIT DIAGNOSIS >
PASSENGER SIDE DOOR MIRROR DEFOGGER
PASSENGER SIDE DOOR MIRROR DEFOGGER
DescriptionINFOID:0000000009463049
Heats the heating wire with the power supply from the rear window defogger relay to prevent the door mirror
from fogging up.
Component Function CheckINFOID:0000000009463050
1.CHECK DOOR MIRROR DEFOGGER RH
Check that the heating wire of door mirror defogger RH is heated when turning the rear window defogger
switch ON.
Is the inspection result normal?
YES >> Door mirror defogger RH is OK.
NO >> Refer to DEF-32, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000009463051
Regarding Wiring Diagram information, refer to DEF-11, "Wiring Diagram".
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door mirror RH.
3. Turn ignition switch ON.
4. Check voltage between door mirror RH connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace harness.
2. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between door mirror RH connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3. CHECK PASSENGER SIDE DOOR MIRROR DEFOGGER
Check door mirror defogger RH.
Refer to DEF-33, "Component Inspection"
.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace door mirror RH. Refer to MIR-20, "Removal and Installation"
.
(+)
(–) Condition Voltage (V)
(Approx.)
Door mirror RH
Connector Terminal
D107 1 Ground Rear window de-
fogger switch ON Battery voltage
OFF 0
Door mirror RH GroundContinuity
Connector Terminal
D107 5 Yes
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-244
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0116 ECT SENSOR
Is 1st trip DTC detected?
YES >> Proceed to
EC-244, "Diagnosis Procedure".
NO >> INSPECTION END
Component Function CheckINFOID:0000000009462195
1.CHECK ENGINE COOLANT TE MPERATURE (ECT) SENSOR
1. Turn ignition switch OFF.
2. Disconnect ECT sensor harness connector.
3. Remove ECT sensor. Refer to CO-24, "Exploded View"
.
4. Check resistance between ECT sensor terminals by heating with hot water as shown in the figure.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Proceed to EC-244, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000009462196
1.CHECK ENGINE COOLANT TE MPERATURE (ECT) SENSOR
Check ECT sensor. Refer to EC-244, "Component Inspection"
.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Replace ECT sensor. Refer to CO-24, "Exploded View"
.
Component InspectionINFOID:0000000009462197
1.CHECK ENGINE COOLANT TEMPERATURE (ECT) SENSOR
1. Turn ignition switch OFF.
2. Disconnect ECT sensor harness connector.
3. Remove ECT sensor.
4. Check resistance between ECT sensor terminals by heating
with hot water as shown in the figure.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace engine coolant temperature sensor. Refer to CO-24, "Exploded View"
.
ECT sensor
Condition Resistance (k Ω)
+ −
Te r m i n a l
12 Temperature [
°C
( ° F)] 20 (68) 2.37 – 2.63
50 (122) 0.68 – 1.00
90 (194) 0.236 – 0.260
JMBIA0080ZZ
ECT sensor ConditionResistance
(kΩ)
+
−
Te r m i n a l
1 2 Temperature [ °C ( °F)] 20 (68) 2.37 - 2.63
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
JMBIA0080ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-246
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0117, P0118 ECT SENSOR
*1: Except for California
*2: For California
4. Also check harness for short to ground.
Is the inspection result normal?
YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
3.CHECK ENGINE COOLANT TEMPERATURE SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between ECT sensor harness connector and ECM harness connector.
*1: Except for California
*2: For California
4. Also check harness for short to ground to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Check the engine coolant temperature sensor. Refer to EC-244, "Component Inspection"
.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Replace engine coolant temperature sensor. Refer to CO-24, "Exploded View"
.
Component InspectionINFOID:0000000009462200
1.CHECK ENGINE COOLANT TEMPERATURE (ECT) SENSOR
1. Turn ignition switch OFF.
2. Disconnect ECT sensor harness connector.
3. Remove ECT sensor.
4. Check resistance between ECT sensor terminals by heating
with hot water as shown in the figure.
Is the inspection result normal?
+ −
Continuity
ECT sensor ECM
Connector Terminal Connector Terminal
F54 1 F14
*1
F91*228 Existed
+
−
Continuity
ECT sensor ECM
Connector Terminal Connector Terminal
F54 2 F14
*1
F91*227 Existed
ECT sensor
ConditionResistance
(kΩ)
+
−
Te r m i n a l
1 2 Temperature [ °C ( °F)] 20 (68) 2.37 - 2.63
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
JMBIA0080ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-252
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
P0125 ECT SENSOR
Check the engine coolant temperature sensor. Refer to
EC-244, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace engine coolant temperature sensor. Refer to CO-24, "Exploded View"
.
2.CHECK THERMOSTAT OPERATION
When the engine is cold [lower than 70 °C (158 °F)] condition, grasp lower radiator hose and confirm the engine
coolant does not flow.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> Repair or replace thermostat. Refer to CO-22, "Removal and Installation"
.
Component InspectionINFOID:0000000009462206
1.CHECK ENGINE COOLANT TEMPERATURE (ECT) SENSOR
1. Turn ignition switch OFF.
2. Disconnect ECT sensor harness connector.
3. Remove ECT sensor.
4. Check resistance between ECT sensor terminals by heating
with hot water as shown in the figure.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace engine coolant temperature sensor. Refer to CO-24, "Exploded View"
.
ECT sensor
ConditionResistance
(kΩ)
+
−
Te r m i n a l
1 2 Temperature [ °C ( °F)] 20 (68) 2.37 - 2.63
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
JMBIA0080ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM