Nissan Qashqai J11. Manual - part 350

 

  Index      Nissan     Nissan Qashqai J11 - Service and Repair Manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  348  349  350  351   ..

 

 

Nissan Qashqai J11. Manual - part 350

 

 

LOW PRESSURE FUEL PUMP

ECM-377

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

LOW PRESSURE FUEL PUMP

Component Function Check

INFOID:0000000010703063

1.

CHECK LOW PRESSURE 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

>> Proceed to 

ECM-377, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010703064

1.

CHECK FUEL PUMP RELAY POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between ECM harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector.

3.

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

4.

Also check harness for short to power.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

3.

CHECK FUEL PUMP POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Reconnect ECM harness connector.

3.

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

4.

Turn ignition switch ON.

5.

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

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

JSBIA0601ZZ

+

Voltage

ECM

Connector

Terminal

Connector

Terminal

F16

87

E57

128

Battery voltage

+

Continuity

ECM

IPDM E/R

Connector

Terminal

Connector

Terminal

F16

87

F90

106

Existed

ECM-378

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

LOW PRESSURE FUEL PUMP

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect  IPDM E/R harness connector.

3.

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

4.

Also check harness for short to power.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

5.

CHECK FUEL PUMP GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

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

3.

Also check harness for short to ground and to power.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace malfunctioning part.

6.

CHECK FUEL PUMP

Check fuel pump. Refer to 

ECM-378, "Component Inspection (Fuel Pump)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Replace “fuel level sensor unit and fuel pump”. Refer to 

FL-19, "Removal and Installation"

.

Component Inspection (Fuel Pump)

INFOID:0000000010703065

1.

CHECK FUEL PUMP

1.

Turn ignition switch OFF.

2.

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

3.

Check the resistance between “fuel level sensor unit and fuel pump” terminals as follows.

+

Voltage

Fuel level sensor unit and fuel 

pump

Connector

Terminal

B72

1

Ground

Battery voltage should exist 1 second after igni-
tion switch is turn ON.

+

Continuity

Fuel level sensor unit and fuel 

pump

IPDM E/R

Connector

Terminal

Connector

Terminal

B72

1

E39

48

Existed

+

Continuity

Fuel level sensor unit and fuel pump

Connector

Terminal

B72

3

Ground

Existed

LOW PRESSURE FUEL PUMP

ECM-379

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace “fuel level sensor unit and fuel pump”. Refer to 

FL-19, "Removal and Installation"

.

Fuel level sensor unit and fuel pump

Resistance

+

Terminal

1

3

0.2 - 5.0 

 [at 25

°

C (77

°

F)]

ECM-380

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

HIGH PRESSURE FUEL PUMP

HIGH PRESSURE FUEL PUMP

Component Function Check

INFOID:0000000010703066

1.

CHECK HIGH PRESSURE FUEL PUMP FUNCTION

With CONSULT

1.

Start engine.

2.

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 the voltage between ECM terminals as per the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

ECM-380, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010703067

1.

CHECK HIGH PRESSURE FUEL PUMP POWER SUPPLY

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

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

Voltage

+

Terminal

F16

51

52

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

NOTE:
The pulse cycle changes depending on 
rpm at idle.

Battery voltage

(11 - 14 V)  

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

Battery voltage

(11 - 14 V)  

JPBIA4722ZZ

JPBIA4723ZZ

+

Voltage

ECM

Connector

Terminal

F16

50

Ground

Battery voltage

 

 

 

 

 

 

 

Content   ..  348  349  350  351   ..