Nissan Tiida C11. Manual - part 516

EC-714

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ELECTRIC IGNITION SYSTEM

ELECTRIC IGNITION SYSTEM

System Diagram

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System Description

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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

ELECTRIC IGNITION SYSTEM

EC-715

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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

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1.

Ignition coil (with power transistor) 
and spark plug

2.

Intake valve timing control solenoid 
valve

3.

Refrigerant pressure sensor

4.

Knock sensor

5.

Fuel injector

6.

Cooling fan motor

7.

Camshaft position sensor (PHASE)

8.

IPDM E/R

9.

ECM

10. Mass air flow sensor (with intake 

temperature sensor)

11.

Engine coolant 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

PBIB3261E

EC-716

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ELECTRIC IGNITION SYSTEM

1.

Mass air flow sensor
(with intake air temperature sensor)

2.

Engine coolant temperature sensor

3.

Electric throttle control actuator
(with built in throttle position sensor, 
throttle control motor)

4.

PCV valve

5.

Cooling fan motor

6.

Resistor

7.

Refrigerant pressure sensor

BBIA0724E

ELECTRIC IGNITION SYSTEM

EC-717

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1.

Intake valve timing control solenoid 
valve

2.

Knock sensor

3.

IPDM E/R

4.

Fuel pump fuse

5.

Fuel level sensor unit and fuel pump 
harness connector
(view with inspection hole cover re-
moved)

6.

Fuel level sensor unit and fuel pump

7.

Fuel pressure regulator

8.

Fuel level sensor

9.

Fuel tank temperature sensor

10. Ignition coil

11.

Fuel injector

BBIA0735E