Nissan Qashqai J11. Manual - part 349

 

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Nissan Qashqai J11. Manual - part 349

 

 

FUEL INJECTOR

ECM-373

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

4.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part.

3.

CHECK FUEL INJECTOR DRIVER POWER SUPPLY

1.

Disconnect ECM harness connector.

2.

Turn ignition switch ON.

3.

Check the continuity between ECM harness connector and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> GO TO 4.

4.

CHECK FUEL INJECTOR DRIVER POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect fuel injector relay harness connector.

4.

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

5.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace malfunctioning part.

5.

CHECK FUEL INJECTOR RELAY POWER SUPPLY (CONTACT SIDE)

Check the voltage between fuel injector relay harness connector and ground.

+

Continuity

Fuel injector

ECM

Cylinder

Connector

Terminal

Connector

Terminal

1

F29

1

F15

1

Existed

2

F30

1

2

3

F31

1

3

4

F32

1

4

+

Voltage

ECM

Connector

Terminal

F16

49

Ground

Battery voltage

53

+

Continuity

ECM

Fuel injector relay

Connector

Terminal

Connector

Terminal

F16

49

F49

5

Existed

53

7

+

Voltage

Fuel injector relay

Connector

Terminal

F49

3

Ground

Battery voltage

6

ECM-374

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

FUEL INJECTOR

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Perform trouble diagnosis for power supply circuit.

6.

CHECK FUEL INJECTOR RELAY POWER SUPPLY (EXCITATION COIL SIDE)

1.

Install all removed parts.

2.

Turn ignition switch ON.

3.

Check the voltage between fuel injector relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

CHECK FUEL INJECTOR RELAY POWER SUPPLY (EXCITATION COIL SIDE)

1.

Turn ignition switch OFF.

2.

Disconnect fuel injector relayharness connector.

3.

Disconnect IPDM E/R harness connector.

4.

Check the continuity between IPDM E/R harness connector and fuel injector relay harness connector.

5.

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.

8.

CHECK FUEL INJECTOR RELAY GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect fuel injector relay harness connector.

3.

Check the continuity between fuel injector relay harness connector and ground.

4.

Also check harness for short to ground.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair or replace malfunctioning part.

9.

CHECK FUEL INJECTOR GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

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

+

Voltage

Fuel injector relay

Connector

Terminal

F49

1

Ground

Battery voltage

+

Continuity

IPDM E/R

Fuel injector relay

Connector

Terminal

Connector

Terminal

F90

96

F49

1

Existed

+

Continuity

Fuel injector relay

Connector

Terminal

F49

2

Ground

Existed

FUEL INJECTOR

ECM-375

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

I

J

K

L

M

A

ECM

N

P

O

4.

Also check harness for short to ground.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair or replace malfunctioning part.

10.

CHECK FUEL INJECTOR RELAY

Check fuel injector relay. Refer to 

ECM-375, "Component Inspection (Fuel Injector Relay)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Replace fuel injector relay.

11.

CHECK FUEL INJECTOR

Check fuel injector. Refer to 

ECM-375, "Component Inspection (Fuel Injector)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Replace fuel injector. Refer to 

EM-164, "Removal and Installation"

.

Component Inspection (Fuel Injector)

INFOID:0000000010703061

1.

CHECK FUEL INJECTOR

1.

Turn ignition switch OFF.

2.

Disconnect fuel injector harness connector.

3.

Check the resistance between fuel injector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace fuel injector relay.

Component Inspection (Fuel Injector Relay)

INFOID:0000000010703062

1.

CHECK FUEL INJECTOR RELAY

1.

Turn ignition switch OFF.

2.

Remove fuel injector relay.

+

Continuity

Fuel injector

ECM

Cylinder

Connector

Terminal

Connector

Terminal

1

F29

2

F15

5

Existed

2

F30

2

6

3

F31

2

7

4

F32

2

8

Fuel injector

Resistance

(Approx.)

+

Terminal

1

2

1.44 – 1.73 

 [at 10 – 60

°

C (50 –140

°

F)]

ECM-376

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

FUEL INJECTOR

3.

Check the continuity between fuel injector relay terminals as per
the following conditions. 

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace fuel injector relay.

+

Condition

Continuity

Fuel injector relay

Terminal

3

5

12 V direct current supply between ter-
minals 1 and 2

Existed

No current supply

Not existed

6

7

12 V direct current supply between ter-
minals 1 and 2

Existed

No current supply

Not existed

JSBIA1178ZZ

 

 

 

 

 

 

 

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