Nissan Almera Tino V10. Manual — part 304
EC-42
[QG (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM
SYSTEM DESCRIPTION
The ignition timing is controlled by the ECM to maintain the best air-
fuel ratio for every running condition of the engine. The ignition tim-
ing data is stored in the ECM. This data forms the map shown.
The ECM receives information such as the injection pulse width and
camshaft position sensor signal. Computing this information, ignition
signals are transmitted to the power transistor.
e.g., N: 1,800 rpm, Tp: 1.50 msec
A
°
BTDC
During the following conditions, the ignition timing is revised by the
ECM according to the other data stored in the ECM.
●
At starting
●
During warm-up
●
At idle
●
At low battery voltage
●
During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
Air Conditioning Cut Control
EBS00QGH
INPUT/OUTPUT SIGNAL CHART
*1: These signals are sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.
●
When the accelerator pedal is fully depressed.
●
When cranking the engine.
●
At high engine speeds.
●
When the engine coolant temperature becomes excessively high.
●
When operating power steering during low engine speed or low vehicle speed.
●
When engine speed is excessively low.
●
When refrigerant pressure is excessively low or high.
SEF742M
Sensor
Input Signal to ECM
ECM Function
Actuator
Air conditioner switch*
1
Air conditioner “ON” signal
Air conditioner
cut control
Air conditioner relay
Throttle position sensor
Throttle valve opening angle
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed
*2
Engine coolant temperature sensor
Engine coolant temperature
Battery
Battery voltage
*2
Refrigerant pressure sensor
Refrigerant pressure
Power steering pressure sensor
Power steering operation
Vehicle speed signal
*1
Vehicle speed
ENGINE CONTROL SYSTEM
EC-43
[QG (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Fuel Cut Control (at No Load and High Engine Speed)
EBS00QGI
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
If the engine speed is above 3,950 rpm with no load (for example, in neutral and engine speed over 3,950
rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed.
Fuel cut will operate until the engine speed reaches 1,500 rpm, then fuel cut is cancelled.
NOTE:
This function is different from deceleration control listed under “Multiport Fuel Injection (MFI) System”,
.
CAN Communication
EBS00QGJ
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
A/T MODELS WITH ESP
System diagram
Input/output signal chart
T: Transmit R: Receive
Sensor
Input Signal to ECM
ECM Function
Actuator
Park/neutral position (PNP) switch
Neutral position
Fuel cut control
Fuel injectors
Throttle position sensor
Throttle position
Accelerator pedal position sensor
Accelerator pedal position
Engine coolant temperature sensor
Engine coolant temperature
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed
Vehicle speed signal
*1
Vehicle speed
YEL465E
Signals
ECM
TCM
ESP/TCS/
ABS control
unit
Smart
entrance
control unit
Steering
angle sensor
Combination
meter
Engine speed signal
T
R
R
Brake switch signal
R
T
Rear window defogger signal
R
T
Heater fan switch signal
R
T
Air conditioner switch signal
R
T
MI signal
T
R
Engine coolant temperature signal
T
R
Fuel consumption signal
T
R
EC-44
[QG (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM
M/T MODELS WITH ESP
System diagram
Input/output signal chart
T: Transmit R: Receive
Vehicle speed signal
T
R
R
T
Seat belt reminder signal
R
T
Headlamp switch signal
T
R
Flashing indicator signal
T
R
Engine cooling fan speed signal
T
R
Door switches state signal
T
R
A/C compressor signal
T
R
A/C compressor feedback signal
T
R
Accelerator pedal position signal
T
R
Output shaft revolution signal
R
T
OD OFF switch signal
R
T
OD OFF indicator signal
T
R
A/T self-diagnosis signal
R
T
P range signal
T
R
Steering angle sensor signal
R
T
A/T position indicator signal
R
T
R
R
ABS warning lamp signal
T
R
Slip indicator lamp signal
T
R
VDC Off indicator lamp signal
T
R
Brake warning lamp signal
T
R
N range switch signal
R
T
P range switch signal
R
T
Signals
ECM
TCM
ESP/TCS/
ABS control
unit
Smart
entrance
control unit
Steering
angle sensor
Combination
meter
YEL466E
Signals
ECM
ESP/TCS/ABS
control unit
Smart entrance
control unit
Steering angle
sensor
Combination
meter
Engine speed signal
T
R
R
Rear window defogger signal
R
T
Heater fan switch signal
R
T
Air conditioner switch signal
R
T
MI signal
T
R
Engine coolant temperature signal
T
R
ENGINE CONTROL SYSTEM
EC-45
[QG (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
A/T MODELS WITHOUT ESP
System diagram
Input/output signal chart
T: Transmit R: Receive
Fuel consumption signal
T
R
Vehicle speed signal
T
R
R
T
Seat belt reminder signal
R
T
Headlamp switch signal
T
R
Flashing indicator signal
T
R
Engine cooling fan speed signal
T
R
Door switches state signal
T
R
A/C compressor signal
T
R
A/C compressor feedback signal
T
R
Accelerator pedal position signal
T
R
Steering angle sensor signal
R
T
ABS warning lamp signal
T
R
Slip indicator lamp signal
T
R
VDC off indicator lamp signal
T
R
Brake warning lamp signal
T
R
Signals
ECM
ESP/TCS/ABS
control unit
Smart entrance
control unit
Steering angle
sensor
Combination
meter
YEL468E
Signals
ECM
TCM
ABS actuator
and electric
unit (control
unit)
Smart entrance
control unit
Combination
meter
Engine speed signal
T
R
Brake switch signal
R
T
Rear window defogger signal
R
T
Heater fan switch signal
R
T
Air conditioner switch signal
R
T
MI signal
T
R
Engine coolant temperature signal
T
R
Fuel consumption signal
T
R
Vehicle speed signal
T
R
R
T
Seat belt reminder signal
R
T
Headlamp switch signal
T
R
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