Nissan Altima L32. Instruction — part 488
MULTIPORT FUEL INJECTION SYSTEM
EC-1073
< FUNCTION DIAGNOSIS >
[VQ35DE]
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Component Description
INFOID:0000000004361968
1.
ASCD brake switch
2.
Stop lamp switch
3.
Brake pedal
4.
ASCD steering switch
5.
ASCD clutch switch (M/T models)
6.
Clutch pedal
ALBIA0105ZZ
Component
Reference
A/F sensor 1
Accelerator pedal position sensor
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)
Engine coolant temperature sensor
Fuel injector
Heated oxygen sensor 2
Intake air temperature sensor
EC-1074
< FUNCTION DIAGNOSIS >
[VQ35DE]
MULTIPORT FUEL INJECTION SYSTEM
Knock sensor
Mass air flow sensor
Park/neutral position (PNP) switch (M/T)
Power steering pressure sensor
TCM (CVT)
Throttle position sensor
Component
Reference
ELECTRIC IGNITION SYSTEM
EC-1075
< FUNCTION DIAGNOSIS >
[VQ35DE]
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ELECTRIC IGNITION SYSTEM
System Diagram
INFOID:0000000004361969
System Description
INFOID:0000000004361970
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM via the CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
Ignition order: 1 - 2 - 3 - 4 - 5 - 6
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
JMBIA1967GB
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Engine speed*
2
Piston position
Ignition timing
control
Ignition coil
(with power transistor)
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
TCM (CVT)
Park/neutral position (PNP) switch (M/T)
Gear position
Battery
Battery voltage*
2
Knock sensor
Engine knocking
Unified meter and A/C amp.
Vehicle speed*
1
EC-1076
< FUNCTION DIAGNOSIS >
[VQ35DE]
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:0000000004404404
1.
Power valve actuator 1
2.
Intake valve timing control solenoid
valve (bank 1)
3.
Power steering pressure sensor
4.
Intake valve timing control solenoid
valve (bank 2)
5.
VIAS control solenoid valves 1 and 2 6.
Fuel injector (bank 2)
7.
Ignition coil (with power transistor)
and spark plug (bank 2)
8.
Crankshaft position sensor (POS)
9.
Engine coolant temperature sensor
10. Camshaft position sensor (PHASE)
(bank 2)
11. ECM
12. Refrigerant pressure sensor
13. Battery current sensor
14. PNP switch
15. Condenser-2
16. Mass air flow sensor (with intake air
temperature sensor)
17. EVAP service port
18. Camshaft position sensor (PHASE)
(bank 1)
ALBIA0110ZZ
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