Nissan Qashqai (2007-2010). Manual — part 196

FUEL INJECTOR

EC-303

< COMPONENT DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors F123, E6
• 10A fuse (No. 58)
• Harness for open or short between fuel injector and fuse

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.

CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between fuel injector harness connector and ECM harness connector.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

4.

CHECK FUEL INJECTOR

Refer to

EC-304, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace malfunctioning fuel injector.

5.

CHECK INTERMITTENT INCIDENT

Refer to

GI-39, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

Component Inspection

INFOID:0000000001056506

1.

CHECK FUEL INJECTOR

1.

Turn ignition switch OFF.

2.

Disconnect fuel injector harness connector.

3.

Check resistance between fuel injector terminals as follows.

Fuel injector

Ground

Voltage

Cylinder

Connector

Terminal

1

F37

1

Ground

Battery voltage

2

F38

1

3

F39

1

4

F40

1

Fuel injector

ECM

Continuity

Cylinder

Connector

Terminal

Connector

Terminal

1

F37

2

F7

31

Existed

2

F38

2

30

3

F39

2

29

4

F40

2

25

EC-304

< COMPONENT DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

FUEL INJECTOR

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning fuel injector.

Terminals

Resistance [at 10 - 60

°

C (50 - 140

°

F)]

1 and 2

11.1 - 14.5

Ω

FUEL PUMP

EC-305

< COMPONENT DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

C

D

E

F

G

H

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J

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A

EC

N

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FUEL PUMP

Description

INFOID:0000000001056507

*: ECM determines the start signal status by the signals of engine speed and battery voltage.

The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a engine speed signal from the crankshaft position sensor and camshaft posi-
tion sensor (PHASE), it knows that the engine is rotating, and causes the pump to operate. If the engine speed
signal is not received when the ignition switch is ON, the engine stalls. The ECM stops pump operation and
prevents battery discharging, thereby improving safety. The ECM does not directly drive the fuel pump. It con-
trols the ON/OFF fuel pump relay, which in turn controls the fuel pump.

Component Function Check

INFOID:0000000001056508

1.

CHECK FUEL PUMP FUNCTION

1.

Turn ignition switch ON.

2.

Pinch fuel feed hose with two fingers.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>>

EC-306, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001116056

1.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 2.

2.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-II

Sensor

Input signal to ECM

ECM Function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

Fuel pump control

Fuel pump relay

↓

Fuel pump

Battery

Battery voltage*

Condition

Fuel pump operation

Ignition switch is turned to ON.

Operates for 1 second.

Engine running and cranking

Operates.

When engine is stopped

Stops in 1.5 seconds.

Except as shown above

Stops.

Fuel pressure pulsation should be felt on the fuel feed
hose for 1 second after ignition switch is turned ON.

JMBIA0415ZZ

ECM

Ground

Voltage

Connector

Terminal

F7

23

Ground

Battery voltage

EC-306

< COMPONENT DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

FUEL PUMP

1.

Turn ignition switch OFF.

2.

Disconnect IDPDM E/R harness connector.

3.

Check the continuity between IPDM E/R harness connector and ECM harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness or connectors E6, F123.
• Harness for open or short to ground and short power.

>> Repair harness or connectors.

4.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-III

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Disconnect “fuel level sensor unit and fuel pump” harness connector.

4.

Turn ignition switch ON.

5.

Check voltage between “fuel level sensor unit and fuel pump” harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 5.

5.

CHECK 10A FUSE

1.

Turn ignition switch OFF.

2.

Disconnect 10A fuse (No. 57) from IPDM E/R.

3.

Check 10A fuse.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace fuse.

6.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT-IV

1.

Disconnect IPDM E/R harness connector.

2.

Check the continuity between IPDM E/R harness connector and “fuel level sensor unit and fuel pump”
harness connector.

3.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 10.

ECM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

F7

23

E13

33

Existed

Fuel level sensor unit

and fuel pump

Ground

Voltage

Connector

Terminal

B40

1

Ground

Battery voltage should exist 1
second after ignition switch is

turn ON.

IPDM E/R

Fuel level sensor unit and

fuel pump

Continuity

Connector

Terminal

Connector

Terminal

F13

42

B40

1

Existed