Nissan Qashqai (2007-2010). Manual - part 371

MULTIPORT FUEL INJECTION SYSTEM

EC-1003

< FUNCTION DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

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EC

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1.

PCV valve

2.

Ignition coil (with power transistor) 
and spark plug

3.

Fuel injection

1.

Refrigerant pressure sensor

2.

Resister

3.

Cooling fan motor

1.

Intake valve timing control solenoid 
valve

2.

Knock sensor

1.

Crankshaft position sensor (POS)

2.

Ground

JMBIA0345ZZ

JMBIA0445ZZ

JMBIA0446ZZ

EC-1004

< FUNCTION DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

MULTIPORT FUEL INJECTION SYSTEM

1.

ASCD clutch switch

2.

Data link connector 

1.

Stop lamp switch

2.

ASCD brake switch

3.

Accelerator pedal position sensor

1.

ASDC steering switch

2.

CANSEL switch

3.

RESUME/ACCCELERATE switch

4.

SET/COAST switch

5.

MAIN SWITCH

6.

1.

Fuel level sensor unit and fuel pump 
harness connector

2.

Fuel level sensor unit and fuel pump 3.

Fuel pressure regulator

JMBIA0347ZZ

JMBIA0348ZZ

JMBIA0349ZZ

JMBIA0346ZZ

MULTIPORT FUEL INJECTION SYSTEM

EC-1005

< FUNCTION DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

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Component Description

INFOID:0000000001094056

Component

Reference

Accelerator pedal position sensor

EC-909, "Description"

Camshaft position sensor (PHASE)

EC-813, "Description"

Crankshaft position sensor (POS)

EC-809, "Description"

Engine coolant temperature sensor

EC-754, "Description"

Fuel injector

EC-923, "Description"

Heated oxygen sensor 1

EC-760, "Description"

Heated oxygen sensor 2

EC-778, "Description"

Intake air temperature sensor

EC-751, "Description"

Knock sensor

EC-807, "Description"

Mass air flow sensor

EC-746, "Description"

Park/neutral position (PNP) switch

EC-892, "Description"

Throttle position sensor

EC-757, "Description"

Vehicle speed sensor

EC-825, "Description"

EC-1006

< FUNCTION DIAGNOSIS >

[MR20DE (WITHOUT EURO-OBD)]

ELECTRIC IGNITION SYSTEM

ELECTRIC IGNITION SYSTEM

System Diagram

INFOID:0000000001094057

System Description

INFOID:0000000001094058

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