Nissan Qashqai J11. Manual - part 351

HIGH PRESSURE FUEL PUMP

ECM-381

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

YES

>> GO TO 8.

NO

>> GO TO 2.

2.

CHECK HIGH PRESSURE FUEL PUMP POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect high pressure fuel pump relay harness connector.

4.

Check the continuity between ECM harness connector and high pressure fuel pump relay harness con-
nector.

5.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part.

3.

CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY (CONTACT SIDE)

Check the voltage between high pressure fuel pump relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Perform the trouble diagnosis for power supply circuit.

4.

CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY (EXCITATION COIL SIDE)

1.

Install all removed parts.

2.

Turn ignition switch ON.

3.

Check the voltage between high pressure fuel pump relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK HIGH PRESSURE FUEL PUMP RELAY POWER SUPPLY CIRCUIT (EXCITATION COIL SIDE)

1.

Turn ignition switch OFF.

2.

Disconnect high pressure fuel pump relay harness connector.

3.

Disconnect IPDM E/R harness connector.

4.

Check the continuity between IPDM E/R harness connector and high pressure fuel pump relay harness
connector.

+

−

Continuity

ECM

High pressure fuel pump relay

Connector

Terminal

Connector

Terminal

F16

50

F161

5

Existed

+

−

Voltage

High pressure fuel pump relay

Connector

Terminal

F161

3

Ground

Battery voltage

+

−

Voltage

High pressure fuel pump relay

Connector

Terminal

F161

1

Ground

Battery voltage

ECM-382

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

HIGH PRESSURE FUEL PUMP

5.

Also check harness for short to power.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

6.

CHECK HIGH PRESSURE FUEL PUMP RELAY GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect high pressure fuel pump relay harness connector.

3.

Check the continuity between high pressure fuel pump relay harness connector and ground.

4.

Also check harness for short to ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace malfunctioning part.

7.

CHECK HIGH PRESSURE FUEL PUMP RELAY

Check high pressure fuel pump relay. Refer to 

ECM-384, "Component Inspection (High Pressure Fuel Pump

Relay)"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace high pressure fuel pump relay. Refer to 

ECM-103, "Wiring Diagram"

 for connector num-

ber, 

PG-103, "LHD : Engine Room Harness"

 (LHD) 

PG-120, "RHD : Engine Room Harness"

(RHD) for relay location.

8.

CHECK HIGH PRESSURE FUEL PUMP CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector and high pressure fuel pump relay harness connector.

3.

Check the continuity between ECM harness connector and high pressure fuel pump harness connector.

4.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace malfunctioning part.

9.

CHECK HIGH PRESSURE FUEL PUMP

Check high pressure fuel pump. Refer to 

ECM-383, "Component Inspection (High Pressure Fuel Pump)"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Replace high pressure fuel pump. Refer to 

EM-159, "Removal and Installation"

.

+

−

Continuity

IPDM E/R

High pressure fuel pump relay

Connector

Terminal

Connector

Terminal

F90

96

F161

1

Existed

+

−

Continuity

High pressure fuel pump relay

Connector

Terminal

F161

2

Ground

Existed

+

−

Continuity

ECM

High pressure fuel pump

Connector

Terminal

Connector

Terminal

F16

51

F161

1

Existed

52

2

HIGH PRESSURE FUEL PUMP

ECM-383

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

10.

CHECK HIGH PRESSURE FUEL PUMP INSTALLATION

1.

Turn ignition switch OFF.

2.

Check high pressure fuel pump for improper attachment or looseness.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair or replace malfunctioning part.

11.

CHECK CAMSHAFT

1.

Remove camshaft. Refer to 

EM-197, "Removal and Installation"

.

2.

Check camshaft. Refer to 

EM-200, "Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Replace camshaft. Refer to 

EM-197, "Removal and Installation"

.

Component Inspection (High Pressure Fuel Pump)

INFOID:0000000010703068

1.

CHECK HIGH PRESSURE FUEL PUMP-1

1.

Turn ignition switch OFF.

2.

Disconnect high pressure fuel pump harness connector.

3.

check the resistance between high pressure fuel pump terminals as per the following conditions.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace high pressure fuel pump. Refer to 

EM-159, "Removal and Installation"

.

2.

CHECK HIGH PRESSURE FUEL PUMP-2

With CONSULT

1.

Reconnect high pressure fuel pump harness connector.

2.

Start engine.

3.

Select “FUEL PRES SEN V” in “DATA MONITOR” mode of “ENGINE” using CONSULT and check the
indication as per the following conditions.

Without CONSULT

1.

Start engine.

2.

Check fuel rail pressure sensor signal voltage.

High pressure fuel pump

Condition

Resistance

+

−

Terminal

1

2

Temperature [

°

C (

°

F)]

20 - 30 (68 - 86)

0.46 - 0.51 

Ω

Monitor item

Condition

Indication

FUEL PRES SEN V

At idle

820 - 1,140 mV

Revving engine up to 4,000 rpm quickly.

 820 - 2,900 mV

ECM

Condition

Voltage

(Approx.)

Connector

+

−

Terminal

F15

33

39

[Engine is running]
• Warm-up condition
• Idle speed

0.82 – 1.14 V

[Engine is running]
• Warm-up condition
• Engine speed: Revving engine from idle to 4,000 rpm

0.82 – 2.9 V

ECM-384

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

HIGH PRESSURE FUEL PUMP

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace high pressure fuel pump. Refer to 

EM-159, "Removal and Installation"

.

Component Inspection (High Pressure Fuel Pump Relay)

INFOID:0000000010703069

1.

CHECK HIGH PRESSURE FUEL PUMP RELAY

1.

Turn ignition switch OFF.

2.

Remove high pressure fuel pump relay. Refer to 

ECM-14, "ENGINE CONTROL SYSTEM : Component

Parts Location"

.

3.

Check the continuity between high pressure fuel pump relay ter-
minals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace high pressure fuel pump relay. Refer to 

ECM-14, "ENGINE CONTROL SYSTEM : Com-

ponent Parts Location"

.

+

−

Condition

Continuity

High pressure fuel 

pump relay

Terminal

3

5

12 V direct current supply between 
terminals 1 and 2

Existed

No current supply

Not existed

PBIB0098E