Nissan Pathfinder. Manual - part 531

EC-430

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

FUEL INJECTOR

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

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, short to ground or short to power in harness or connectors.

4.

CHECK FUEL INJECTOR

Check fuel injector. Refer to 

EC-431, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace malfunctioning fuel injector. Refer to 

EM-47, "Removal and Installation"

.

5.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-32, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

Component Inspection

INFOID:0000000009178362

1.

CHECK FUEL INJECTOR

1. Turn ignition switch OFF.

2. Disconnect fuel injector harness connector.

Fuel injector

IPDM E/R

Continuity

Cylinder

Connector

Terminal

Connector

Terminal

1

F30

1

F19

54

Existed

2

F18

1

60

3

F41

1

54

4

F20

1

60

5

F42

1

54

6

F22

1

60

Fuel injector

ECM

Continuity

Cylinder

Connector

Terminal

Connector

Terminal

1

F30

2

F51

33

Existed

2

F18

2

44

3

F41

2

48

4

F20

2

47

5

F42

2

46

6

F22

2

45

FUEL INJECTOR

EC-431

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

3. Check resistance between fuel injector terminals as per the fol-

lowing.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning fuel injector. Refer to 

EM-47,

"Removal and Installation"

.

Terminals

Resistance

1 and 2

11.1 - 14.5 

Ω [at 10 - 60°C (50 - 140°F)]

PBIB1727E

EC-432

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

FUEL PUMP

FUEL PUMP

Component Function Check

INFOID:0000000009178363

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-433, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009178364

1.

CHECK FUEL PUMP RELAY POWER SUPPLY-I

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 4.

NO

>> GO TO 2.

2.

CHECK FUEL PUMP RELAY POWER SUPPLY-II

Check the voltage between IPDM E/R harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 11.

3.

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.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

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

JMBIA1696ZZ

ECM

Voltage

+

–

Connector

Terminal

Connector

Terminal

F51

43

E16

128

Battery voltage

IPDM E/R

Ground

Voltage

Connector

Terminal

F24

69

Ground

Battery voltage

ECM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

F51

43

F24

69

Existed

FUEL PUMP

EC-433

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NO

>> Repair or replace error-detected parts.

4.

CHECK CONDENSER-2 POWER SUPPLY

1. Turn ignition switch OFF.

2. Reconnect all harness connectors disconnected.

3. Disconnect condenser-2 harness connector.

4. Turn ignition switch ON.

5. Check the voltage between condenser-2 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK CONDENSER-2 POWER SUPPLY CIRCUIT

1. Disconnect IPDM E/R harness connector.

2. Check the continuity between IPDM E/R harness connector and condenser-2 harness connector.

3. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Perform the trouble diagnosis for power supply circuit.

6.

CHECK CONDENSER-2 GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check the continuity between condenser-2 harness connector and ground.

3. Also check harness for short to power.
Is the inspection result normal?

YES

>> GO TO 7.

NO

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

7.

CHECK CONDENSER-2

Check condenser-2. Refer to 

EC-435, "Component Inspection (Condenser-2)"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace condenser-2.

8.

CHECK FUEL PUMP POWER SUPPLY CIRCUIT

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

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

pump” harness connector.

Condenser-2

Ground

Voltage

Connector

Terminal

B52

1

Ground

Battery voltage should exist for 1 second 
after ignition switch is turned ON.

IPDM E/R

Condenser-2

Continuity

Connector

Terminal

Connector

Terminal

E121

15

B52

1

Existed

Condenser-2

Ground

Continuity

Connector

Terminal

B52

2

Ground

Existed