Nissan Qashqai (2007-2010). Manual — part 286
ELECTRIC IGNITION SYSTEM
EC-663
< FUNCTION DIAGNOSIS >
[MR20DE (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
ELECTRIC IGNITION SYSTEM
System Diagram
INFOID:0000000000936612
System Description
INFOID:0000000000936613
INPUT/OUTPUT SIGNAL CHART
*1: This signal is 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
Firing order: 1 - 3 - 4 - 2
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the
engine. The ignition timing data is stored in the ECM.
The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) sig-
nal. Computing this information, ignition signals are transmitted to the power transistor.
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
JMBIA0174GB
Sensor
Input Signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Engine speed*
2
Piston position
Ignition timing
control
Ignition coil (with power transis-
tor)
Camshaft position sensor (PHASE)
Mass air flow sensor
Amount of intake air
Engine coolant temperature sensor
Engine coolant temperature
Throttle position sensor
Throttle position
Accelerator pedal position sensor
Accelerator pedal position
Battery
Battery voltage*
2
Knock sensor
Engine knocking condition
Park/neutral position (PNP) switch
Gear position
Combination meter*
1
Vehicle speed
EC-664
< FUNCTION DIAGNOSIS >
[MR20DE (WITH EURO-OBD)]
ELECTRIC IGNITION SYSTEM
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.
Component Parts Location
INFOID:0000000001093563
1.
Ignition coil (with power transistor)
and spark plug
2.
PCV valve
3.
Refrigerant pressure sensor
4.
Fuel injector
5.
Knock sensor
6.
Cooling fan motor
7.
Camshaft position sensor (PHASE)
8.
Engine coolant temperature sensor
9.
IPDM E/R
10. ECM
11.
Mass air flow sensor (with intake
temperature sensor)
12. Electric throttle control actuator
(with built in throttle position sensor
and throttle control motor)
13. EVAP canister purge volume control
solenoid valve
1.
ECM
2.
IPDM E/R
3.
Fuel pump fuse (15A)
JMBIA0338ZZ
JMBIA0340ZZ
ELECTRIC IGNITION SYSTEM
EC-665
< FUNCTION DIAGNOSIS >
[MR20DE (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
1.
Electric throttle control actuator
(with built-in position sensor, throttle
control motor)
2.
Throttle valve
1.
EVAP canister purge volume control
solenoid valve
2.
Mass air flow sensor
(with intake air temperature sensor)
1.
Camshaft position sensor
2.
Engine coolant temperature sensor
JMBIA0341ZZ
JMBIA0342ZZ
JMBIA0343ZZ
EC-666
< FUNCTION DIAGNOSIS >
[MR20DE (WITH EURO-OBD)]
ELECTRIC IGNITION SYSTEM
PBIB2942E
1.
Heated oxygen sensor 1 harness
connector
2.
Heated oxygen sensor 1
3.
Heated oxygen sensor 2
4.
Heated oxygen sensor 2 harness
connector
1.
PCV valve
2.
Ignition coil (with power transistor)
and spark plug
3.
Fuel injection
BBIA0757E
JMBIA0344ZZ
JMBIA0345ZZ
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст