cooling NISSAN TEANA 2014 Workshop Manual

COOLING FANEC-501
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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6.CHECK COOLING FAN MOTOR CIRCUIT-3
1. Check the continuity between cooling f an relay-2, -3 harness connectors and ground.
2. Also check harness for short to ground and to power.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace error-detected parts.
7.CHECK COOLING FAN MOTOR CIRCUIT-4
1. Check the continuity between cooli ng fan motor-2 harness connector and ground.
2. Also check harness for short to ground and to power.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair or replace error-detected parts.
8.CHECK COOLING FAN RELAY-2 AND -3
Refer to EC-502, "Component Inspection (Cooling Fan Relay)"
.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace malfunctioning cooling fan relay.
9.CHECK COOLING FAN MOTORS-1 AND -2
Refer to EC-501, "Component Inspection (Cooling Fan Motor)"
.
Is the inspection result normal?
YES >> GO TO 10.
NO >> Replace malfunctioning cooling fan motor. Refer to CO-18, "Removal and Installation"
.
10.CHECK INTERMITTENT INCIDENT
Perform GI-43, "Intermittent Incident"
.
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-32, "Removal and Installation".
NO >> Repair or replace error-detected parts.
Component Inspection (Cooling Fan Motor)INFOID:0000000009462433
1.CHECK COOLING FAN MOTOR
1. Turn ignition switch OFF.
2. Disconnect cooling fan motor harness connector.
+
−Continuity
Cooling fan relay
Connector Terminal E42
(cooling fan relay-2) 6
Ground Existed
E43
(cooling fan relay-3) 6
+
−Continuity
Cooling fan motor-2
Connector Terminal
E221 3
Ground Existed
4
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EC-502
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
COOLING FAN
3. Supply cooling fan motor terminals with battery voltage and
check operation.
Check that cooling fan speed of cond ition B is higher than that of A.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace cooling fan motor. Refer to CO-18, "Removal and Installation"
.
Component Inspection (Cooling Fan Relay)INFOID:0000000009462434
1.CHECK COOLING FAN RELAYS
1. Turn ignition switch OFF.
2. Remove cooling fan relay-2, -3.
3. Check the continuity between cooling fan relay-2, -3 terminals as per the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace cooling fan relay.
Cooling fan motor
Condition
Te r m i n a l
+– 1 3 and 4
A
2 3 and 4
1 and 2 3
1 and 2 4 1, 2 3, 4 B
SEF734W
Cooling fan relay-2, -3 Conditions Continuity
+ −
Te r m i n a l
35 12V direct current supply between termi-
nals 1 and 2 Existed
No current supply Not existed
67 12V direct current supply between termi-
nals 1 and 2 Existed
No current supply Not existed
PBIB0439E
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ENGINE CONTROL SYSTEMEC-531
< SYMPTOM DIAGNOSIS > [QR25DE]
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1 - 6: The numbers refer to the order of inspection. Va l v e
mecha-
nism Timing chain
55555 55 5 EM-62
Camshaft
EM-47
Intake valve timing controlEM-62
Intake valve
3EM-78
Exhaust valve
Exhaust Exhaust manifold/Tube/Muf- fler/Gasket 55555 55 5 EM-33
, EX-6
Three way catalyst
Lubrica-
tion Oil pan/Oil strainer/Oil pump/
Oil filter/Oil gallery/Oil cooler 55555 55 5 EM-36
,
LU-9,
LU-11
, LU-7,
LU-17
Oil level (Low)/Filthy oil LU-9
Cooling Radiator/Hose/Radiator filler
cap
55555 55 45 CO-17
Thermostat 5
CO-22
Water pumpCO-20
Water galleryCO-7
Cooling fan
5CO-18
Coolant level (Low)/Contami-
nated coolant CO-11
NVIS (NISSAN Vehicle Immobilizer Sys-
tem — NATS) 11
SEC-63
SYMPTOM
Reference page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code A AAB AC AD AE AF AG AH AJ AK AL AM HA
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EC-548
< SYSTEM DESCRIPTION >[VQ35DE]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
ENGINE CONTROL SYSTEM
ENGINE CONTROL SYSTEM :
Component Parts LocationINFOID:0000000009462480
ENGINE ROOM
ALBIA0805ZZ
No. Component Function
1. Power valve actuator 1 EC-561, "Power Valve Actuator 1 and 2"
2. Electronic controlled engine mount control solenoid valveEC-556, "Electronic Controlled Engine Mount"
3. Cooling fan motor-2EC-554, "Cooling Fan"
4. Cooling fan motor-1EC-554, "Cooling Fan"
5. ECMEC-555, "ECM"
6. Refrigerant pressure sensorEC-562, "Refrigerant
Pressure Sensor"Refer to HAC-9, "Component Part Location" for detailed installa-
tionlocation.
7. Battery current sensor (with battery temperature sensor) EC-553, "Battery Current Sensor (With Battery Temperature Sen-
sor)"
8. Cooling fan motor relay-2
EC-554, "Cooling Fan"
9. Cooling fan motor relay-3EC-554, "Cooling Fan"
10. IPDM E/RIPDM E/R activates the internal control circuit to perform the relay
ON-OFF control according to the input signals from various sen-
sors and the request signals received from control units via CAN
communication.
Refer to PCS-4, "Component Parts Location"
for detailed installa-
tionlocation.
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EC-554
< SYSTEM DESCRIPTION >[VQ35DE]
COMPONENT PARTS
Camshaft Position Sensor (PHASE)
INFOID:0000000009462485
The camshaft position sensor (P HASE) senses the retraction of
intake camshaft to identify a particular cylinder. The camshaft posi-
tion sensor (PHASE) sens es the piston position.
When the crankshaft position sensor (POS) system becomes inoper-
ative, the camshaft position sensor (PHASE) provides various con-
trols of engine parts instead, utilizing timing of cylinder identification
signals.
The sensor consists of a permanent magnet and Hall IC.
When engine is running, the high and low parts of the teeth cause
the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to
change.
Due to the changing magnetic field, the voltage from the sensor changes.
ECM receives the signals as shown in the figure.
Cooling FanINFOID:0000000009462486
DESCRIPTION
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
Refer to EC-575, "COOLING FAN CONTRO L : System Description"
for cooling fan operation.
COOLING FAN MOTOR RELAY
Power supply for the cooling fan motor is provided via cooling fan motor relay.
Crankshaft Position Sensor (POS)INFOID:0000000009462487
The crankshaft position sensor (POS) is located on the oil pan facing
the gear teeth (cogs) of the signal pl ate. It detects the fluctuation of
the engine revolution.
The sensor consists of a permanent magnet and Hall IC.
When the engine is running, the high and low parts of the teeth
cause the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to
change.
Due to the changing magnetic field, the voltage from the sensor
changes.
The ECM receives the voltage signal and detects the fluctuation of
the engine revolution.
JMBIA0064ZZ
JMBIA0001GB
JMBIA0062ZZ
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EC-562
< SYSTEM DESCRIPTION >[VQ35DE]
COMPONENT PARTS
Refrigerant Pressure Sensor
INFOID:0000000009462508
The refrigerant pressure sensor is installed at the c ondenser of the air conditioner system. The sensor uses an
electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.
Stop Lamp Switch & Brake Pedal Position SwitchINFOID:0000000009462509
Stop lamp switch and brake pedal position switch are installed to brake pedal bracket.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).
VIAS Control Solenoid Valve 1 and 2INFOID:0000000009462510
The VIAS control solenoid valve cuts the intake manifold vacuum signal for power valve control. It responds to
ON/OFF signals from the ECM. When the solenoid is OFF, the vacuum signal from the intake manifold is cut.
When the ECM sends an ON signal the coil pulls the plunger downward and sends the vacuum signal to the
power valve actuator.
PBIB2657E
Brake pedal Brake pedal position switch Stop lamp switch
Released ON OFF
Depressed OFF ON
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EC-566
< SYSTEM DESCRIPTION >[VQ35DE]
SYSTEM
ECM controls the engine by various functions.
ENGINE CONTROL SYSTEM : Fail-safeINFOID:0000000009462514
NON DTC RELATED ITEM
DTC RELATED ITEM
Function Reference
Multiport fuel injection system EC-568, "MULTIPORT FUEL INJE
CTION SYSTEM : System De-
scription"
Electric ignition system EC-571, "ELECTRIC IGNITION SYSTEM : System Description"
Air conditioning cut control EC-573, "AIR CONDITIONING CUT
CONTROL : System Descrip-tion"
Automatic speed control device (ASCD) EC-574, "AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Description"
Cooling fan control
EC-575, "COOLING FAN CONTROL : System Description"
Electronic controlled engine mount EC-577, "ELECTRONIC CONTROLLED ENGINE MOUNT : Sys-tem Description"
Evaporative emission systemEC-580, "EVAPORATIVE EMISSI
ON SYSTEM : System Descrip-tion"
Throttle control EC-581, "THROTTLE CONTROL : System Description"
Intake valve timing control EC-583, "INTAKE VALVE TIMING
CONTROL : System Descrip-tion"
Engine protection control at low engine oil pressure EC-583, "ENGINE PROTECTION
CONTROL AT LOW ENGINE OIL PRESSURE : System Description"
Fuel filler cap warning system EC-585, "FUEL FILLER CAP WARNING SYSTEM : System De-scription"
Variable induction air systemEC-586, "VARIABLE INDUCTION AI
R SYSTEM : System Descrip-tion"
Integrated control of engine, CVT, and ABS EC-588, "INTEGRATED CONTROL OF ENGINE, CVT, AND ABS : System Description"
Alternator power generation voltage variable control systemEC-588, "ALTERNATOR POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM
: System Description"
CAN communication EC-588, "CAN COMMUNICATION : System Description"
Engine operating condi-
tion in fail-safe mode Detected items Remarks Reference
page
Engine speed will not
rise more than 2,500 rpm
due to the fuel cut Malfunction indicator
lamp circuit When there is an open circuit on MIL circuit, the ECM cannot warn the
driver by illuminating MIL when there is malfunction on engine control
system.
Therefore, when electrical controlled throttle and part of ECM related
diagnoses are continuously detected as NG for 5 trips, ECM warns the
driver that engine control system malfunctions and MIL circuit is open
by means of operating the fail-safe function.
The fail-safe function also operates when above diagnoses except MIL
circuit are detected and demands the driver to repair the malfunction. EC-973
DTC No. Detected items Engine operating condition in fail-safe mode
P0011
P0021 Intake valve timing control The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
P0101
P0102
P0103 Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
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SYSTEMEC-567
< SYSTEM DESCRIPTION > [VQ35DE]
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P0117
P0118 Engine coolant tempera-
ture sensor circuit Engine coolant temperature will be determined by ECM based on the following condition.
CONSULT displays the engine coolant temperature decided by ECM.
Condition Engine coolant temperature decided
(CONSULT display)
Just as ignition switch is turned ON
or START 40
°C (104 °F)
Approx 4 minutes or more after en-
gine starting 80
°C (176 °F)
Except as shown above 40 - 80
°C (104 - 176 °F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135 Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
Therefore, the acceleration will be poor.
P0196
P0197
P0198 Engine oil temperature
sensor Intake valve timing control does not function.
P0500 Vehicle speed sensor The cooling fan operates (Highest) while engine is running.
P0524 Engine oil pressure • ECM illuminates oil pressure warning lamp on the combination meter.
• Engine speed will not rise more than 4,000 rpm due to the fuel cut.
• Fail-safe is canceled when ignition switch OFF → ON.
P0605 ECM (When ECM calculation function is malfunctioning:) ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
ECM deactivates ASCD operation.
P0643 Sensor power supply ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
P1805 Brake switch ECM controls the electric throttle control actuator by regulating the throttle opening to a small range.
Therefore, acceleration will be poor.
Vehicle condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration
P2100
P2103 Throttle control motor relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2101 Electric th rottle control
function ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2118 Throttle control motor ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring.
DTC No. Detected items Engine operating condition in fail-safe mode
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SYSTEMEC-575
< SYSTEM DESCRIPTION > [VQ35DE]
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• More than 2 switches at ASCD steer
ing switch are pressed at the same time (Set speed will be cleared)
• Brake pedal is depressed
• Selector lever is in the N, P, R position
• Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed
• TCS system is operated
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.
• Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE lamp may
blink slowly.
When the engine coolant temperature decreases to t he normal operating temperature, CRUISE lamp will
stop blinking and the cruise operation will be able to work by pressing SET/COAST switch or RESUME/
ACCELERATE switch.
• Malfunction for some self-diagnoses regarding ASCD control: SET indicator will blink quickly.
If MAIN switch is turned to OFF while ASCD is acti vated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.
COAST OPERATION
When the SET/COAST switch is pressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will maintain the new set speed.
RESUME OPERATION
When the RESUME/ACCELERATE switch is pressed afte r cancel operation other than pressing MAIN switch
is performed, vehicle speed will return to last set s peed. To resume vehicle set speed, vehicle condition must
meet following conditions.
• Brake pedal is released
• A/T selector lever is in the P and N positions
• Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH)
COOLING FAN CONTROL
COOLING FAN CONTROL : System DescriptionINFOID:0000000009462519
SYSTEM DIAGRAM
Automatic Air Conditioning System
JSBIA1589GB
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EC-576
< SYSTEM DESCRIPTION >[VQ35DE]
SYSTEM
Manual Air Conditioning System
INPUT/OUTPUT SIGNAL CHART
*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to ECM via the CAN communication line.
*3: Automatic air conditioning system
*4: Manual air conditioning system
SYSTEM DESCRIPTION
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
JSBIA0321GB
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
1
Piston position
Cooling fan
control IPDM E/R
↓
Cooling fan relay
↓
Cooling fan motor
Engine coolant temperature sensor Engine coolant temperature
Refrigerant pressure sensor Refrigerant pressure
Battery Battery voltage*
1
Combination meter
Vehicle speed signal*2
A/C auto amp.*3• A/C ON signal
• Blower fan ON signal
BCM
*4
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM