NISSAN TEANA 2008 Service Manual

EC-60
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN CONTROL
COOLING FAN CONTROL
System DiagramINFOID:0000000003856482
System DescriptionINFOID:0000000003856483
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 through CAN communication line.
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].
JMBIA1324GB
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
1
Cooling fan
controlIPDM E/R
↓
Cooling fan relay
↓
Cooling fan motor Battery
Battery voltage*
1
ABS actuator and electric unit (control unit)
Vehicle speed*2
Engine coolant temperature sensor Engine coolant temperature
BCM
Air conditioner ON signal*
2
Refrigerant pressure sensor Refrigerant pressure

COOLING FAN CONTROL
EC-61
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
C
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P O Cooling Fan Operation
Cooling Fan Relay Operation
The ECM controls cooling fan relays in the IPDM E/R through CAN communication line.
JMBIA0179GB
Cooling fan speedCooling fan relay
123
Stop (OFF) OFF OFF OFF
Low (LOW) ON OFF OFF
Middle (MID) OFF ON OFF
High (HI) OFF ON ON

EC-62
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN CONTROL
Component Parts Location
INFOID:0000000003857775
1. Intake valve timing control solenoid
valve (bank 1)2. Intake valve timing control solenoid
valve (bank 2)3. Electronic controlled engine mount
control solenoid valve
4. Fuel injector (bank 2) 5. Cooling fan motor-2 6. A/F sensor 1 (bank 2)
7. Ignition coil (with power transistor)
and spark plug (bank 2)8. Camshaft position sensor (PHASE)
(bank 2)9. Crankshaft position sensor (POS)
10. Engine coolant temperature sensor 11. Cooling fan motor-1 12. ECM
13. Refrigerant pressure sensor 14. Battery current sensor 15. IPDM E/R
16. Mass air flow sensor (with intake air
temperature sensor)17. Electric throttle control actuator 18. Power valve actuator 2 (VQ35DE
models)
19. EVAP canister purge volume control
solenoid valve20. Camshaft position sensor (PHASE)
(bank 1)21. Ignition coil (with power transistor)
and spark plug (bank 1)
22. A/F sensor 1 (bank 1) 23. Fuel injector (bank 1) 24. VIAS control solenoid valve 1 and 2
(VQ35DE models)
25. Power valve actuator 1
JMBIA1373ZZ

COOLING FAN CONTROL
EC-63
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
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1. Mass air flow sensor (with intake air
temperature sensor)2. Electric throttle control actuator
: Vehicle front
1. Ignition coil (with power transistor)
and spark plug (bank 1)2. Fuel injector (bank 1) 3. Fuel injector (bank 2)
4. Ignition coil (with power transistor)
and spark plug (bank 2)5. EVAP canister
: Vehicle front
1. Knock sensor (bank 1) 2. Knock sensor (bank 2) 3. Knock sensor
: Vehicle front
JMBIA1374ZZ
JMBIA1375ZZ
JMBIA1376GB
JMBIA1377ZZ

EC-64
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN CONTROL
1. Crankshaft position sensor (POS) 2. Camshaft position sensor (PHASE)
(bank 2)3. Camshaft position sensor (PHASE)
(bank 1)
: Vehicle front
1. Refrigerant pressure sensor 2. Battery current sensor
: Vehicle front
1. ECM 2. Fuel pump fuse 3. IPDM E/R
: Vehicle front
JMBIA1378ZZ
JMBIA1379ZZ
PBIB1686E

COOLING FAN CONTROL
EC-65
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
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1. A/F sensor 1 (bank 1) harness con-
nector2. A/F sensor 1 (bank 1) 3. A/F sensor 1 (bank 2) harness con-
nector
4. A/F sensor 1 (bank 2)
: Vehicle front
1. HO2S2 (bank 1) 2. HO2S2 (bank 2) 3. HO2S2 (bank 2) harness connector
4. Tie-rod (RH) 5. Power steering pressure sensor 6. HO2S2 (bank 1) harness connector
: Vehicle front
1. Electronic controlled engine mount
control solenoid valve2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
4. EVAP canister purge volume control
solenoid valve
JMBIA1116ZZ
JMBIA1380ZZ
JMBIA1381GB

EC-66
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
COOLING FAN CONTROL
1. Electronic controlled engine mount
control solenoid valve2. VIAS control solenoid valve 3. EVAP canister purge volume control
solenoid valve
1. Intake valve timing control solenoid
valve (bank 1)2. Intake valve timing control solenoid
valve (bank 2)3. Data link connector
1. Stop lamp switch 2. ASCD brake switch 3. Accelerator pedal position sensor
1. ASCD steering switch 2. CANCEL switch 3. RESUME/ACCELERATE switch
4. SET/COAST switch 5. MAIN switch
JMBIA1382GB
JMBIA1383ZZ
JMBIA1384ZZ
JMBIA1120ZZ

COOLING FAN CONTROL
EC-67
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
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Component DescriptionINFOID:0000000003856485
1. Fuel level sensor unit and fuel pump
harness connector2. Fuel pressure regulator 3. Fuel level sensor unit and fuel pump
: Vehicle front
JMBIA1385ZZ
Component Reference
Camshaft position sensor (PHASE)EC-222, "
Description"
Crankshaft position sensor (POS)EC-218, "Description"
Cooling fan motorEC-324, "Description"
Engine coolant temperature sensorEC-157, "Description"
Refrigerant pressure sensorEC-348, "Description"

EC-68
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
ELECTRONIC CONTROLLED ENGINE MOUNT
ELECTRONIC CONTROLLED ENGINE MOUNT
System DiagramINFOID:0000000003856486
1. Power valve actuator 1 2. VIAS control solenoid valve 1 3. VIAS control solenoid valve 2
4. Power valve actuator 2 5. Intake manifold collector
: From next figure
JMBIA0182ZZ

ELECTRONIC CONTROLLED ENGINE MOUNT
EC-69
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
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NOTE:
Do not use soapy water or any type of solvent while installing vacuum hose.
System DescriptionINFOID:0000000003856487
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
1. Electronic controlled engine mount
control solenoid valve2. Front electronic controlled engine
mount3. Rear electronic controlled engine
mount
: To previous figure
JMBIA0183ZZ
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed
Engine mount
controlElectronic controlled en-
gine mount control solenoid
valve
ABS actuator and electric unit (control unit) Vehicle speed*