Nissan Teana J32. Manual — part 378
EC-50
< FUNCTION DIAGNOSIS >
[VQ25DE, VQ35DE]
AIR CONDITIONING CUT CONTROL
Component Description
INFOID:0000000003856476
1.
Fuel level sensor unit and fuel pump
harness connector
2.
Fuel pressure regulator
3.
Fuel level sensor unit and fuel pump
: Vehicle front
JMBIA1385ZZ
Component
Reference
Accelerator pedal position sensor
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)
Engine coolant temperature sensor
Power steering pressure sensor
Refrigerant pressure sensor
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-51
< FUNCTION DIAGNOSIS >
[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
System Diagram
INFOID:0000000003856477
System Description
INFOID: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
control
Electric 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*
EC-52
< FUNCTION DIAGNOSIS >
[VQ25DE, VQ35DE]
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
• Brake pedal is depressed
• Selector lever position is N, P or R
• Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed
• TCS system is operated
• CVT control system has a malfunction. Refer to
.
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 the 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 lamp will blink quickly.
If MAIN switch is turned to OFF while ASCD is activated, 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 after cancel operation other than pressing MAIN switch
is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition must
meet following conditions.
• Brake pedal is released
• Selector lever position is other than P and N
• Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH)
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-53
< FUNCTION DIAGNOSIS >
[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Component Parts Location
INFOID: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 valve
20. 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
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