ELECTRIC IGNITION SYSTEM : System Description
SYSTEM DIAGRAM
*1: CVT models
*2: M/T models
Input/output signal chart
Sensor | Input Signal to ECM | ECM function | Actuator | |
Crankshaft position sensor (POS) |
|
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 | |||
Transmission range switch*1 | Gear position | |||
Park/neutral position (PNP) switch*2 | ||||
Battery | Battery voltage*3 | |||
Knock sensor | Engine knocking condition | |||
Combination meter | CAN communication | Vehicle speed signal |
*1: CVT models
*2: M/T models
*3: 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) signal.
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.
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.
Manual transmission (if so equipped)
WARNING
Do not downshift abruptly on slippery
roads. This may cause a loss of control.
Do not over-rev the engine when shifting
to a lower gear. This may cause a
loss of control or engine damage.
Do not shift to the N (Neutral) position
while driving. Doing so may ...
Battery
Exploded view
Battery frame
Battery rods
Battery cover
Battery bracket
Battery tray
Battery
Front
Removal and installation (battery)
Removal
Loosen the battery terminal nuts and disconnect both battery negative
and positive terminals.
Caution:
To prevent damage to t ...
Owner’s Manual/Service Manual order information
Genuine NISSAN Service Manuals for this model
year and prior can be purchased. A genuine
NISSAN Service Manual is the best source of
service and repair information for your vehicle.
This manual is the same one used by the factorytrained
technicians working at NISSAN dealerships.
Genuine NI ...