sensor NISSAN TEANA 2008 Service Manual

AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-51
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
System DiagramINFOID:0000000003856477
System DescriptionINFOID:0000000003856478
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 144 km/h (89 MPH).
ECM controls throttle angle of electric throttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE lamp and SET lamp in combination meter. If any malfunc-
tion occurs in the ASCD system, it automatically deactivates control.
NOTE:
Always drive vehicle in a safe manner according to traffic conditions and obey all traffic laws.
SET OPERATION
Press MAIN switch. (The CRUISE lamp in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press SET/COAST switch. (Then SET lamp in combination meter illuminates.)
ACCELERATE OPERATION
If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until
the switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will maintain the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.
 CANCEL switch is pressed
 More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)
JMBIA1494GB
Sensor Input signal to ECM ECM function Actuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed
controlElectric throttle control
actuator Stop lamp switch Brake pedal operation
ASCD steering switch ASCD steering switch operation
TCM (VQ35DE engine)
Park/neutral position (PNP) switch (VQ25DE
engine)Gear position
Powertrain revolution*
ABS actuator and electric unit (control unit) Vehicle speed*

AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-53
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
Component Parts LocationINFOID:0000000003857774
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

EC-54
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
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

AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-55
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
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

EC-56
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
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

AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-57
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
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

EC-58
< FUNCTION DIAGNOSIS >[VQ25DE, VQ35DE]
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Component Description
INFOID:0000000003856480
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
ASCD steering switchEC-270, "
Description"
ASCD brake switchEC-273, "Description"
ASCD clutch switchEC-273, "Description"
Stop lamp switchEC-291, "Description"
Electric throttle control actuatorEC-302, "Description"
ASCD indicatorEC-323, "Description"

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

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]
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
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