Nissan Quest E52. Instruction — part 555

EC-430

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

FUEL PUMP

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

4.

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.

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK FUEL PUMP GROUND CIRCUIT

1.

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

2.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

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

6.

CHECK FUEL PUMP

Check fuel pump. Refer to

EC-430, "Component Inspection (Fuel Pump)"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace fuel filter and fuel pump assembly. Refer to

FL-5, "Removal and Installation"

.

7.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to

PCS-36, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

Component Inspection (Fuel Pump)

INFOID:0000000009651291

1.

CHECK FUEL PUMP

1.

Turn ignition switch OFF.

2.

Disconnect “fuel level sensor unit (fuel pump)” harness connector.

3.

Check resistance between “fuel level sensor unit (fuel pump)” terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace fuel level sensor unit, fuel filter and fuel pump assembly. Refer to

FL-5, "Exploded View"

.

IPDM E/R

Fuel level sensor unit and fuel

pump

Continuity

Connector

Terminal

Connector

Terminal

E10

13

B40

1

Existed

Fuel level sensor unit and fuel

pump

Ground

Continuity

Connector

Terminal

B40

3

Ground

Existed

Terminals

Resistance [at 25

°

C (77

°

F)]

1 and 3

0.2 - 5.0

Ω

IGNITION SIGNAL

EC-431

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

IGNITION SIGNAL

Component Function Check

INFOID:0000000009651293

1.

INSPECTION START

Turn ignition switch OFF, and restart engine.
Does the engine start?

YES-1 >> With CONSULT: GO TO 2.
YES-2 >> Without CONSULT: GO TO 3.
NO

>> Proceed to

EC-431, "Diagnosis Procedure"

.

2.

CHECK IGNITION SIGNAL FUNCTION

With CONSULT

1.

Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT.

2.

Check that each circuit produces a momentary engine speed drop.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to

EC-431, "Diagnosis Procedure"

.

3.

CHECK IGNITION SIGNAL FUNCTION

Without CONSULT

1.

Let engine idle.

2.

Read the voltage signal between ECM harness connector terminals with an oscilloscope.

NOTE:

The pulse cycle changes depending on rpm at idle.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to

EC-431, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009651294

1.

CHECK ECM POWER SUPPLY

1.

Turn ignition switch OFF, wait at least 10 seconds and then turn it ON.

2.

Check the voltage between ECM harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Refer to

EC-163, "Diagnosis Procedure"

.

ECM

Voltage signal

+

–

Connector

Terminal

Connector

Terminal

F7

9

E16

128

10

11

13

14

15

JMBIA0035GB

ECM

Voltage

Connector

+

–

Terminal

Terminal

E16

121

128

Battery voltage

EC-432

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

IGNITION SIGNAL

2.

CHECK CONDENSER POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect condenser harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between condenser harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK CONDENSER POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connector.

3.

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

4.

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

Is the inspection result normal?

YES

>> Refer to

EC-163, "Diagnosis Procedure"

.

NO

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

4.

CHECK CONDENSER GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check the continuity between condenser harness connector and ground.

3.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK CONDENSER

Check condenser. Refer to

EC-435, "Component Inspection (Condenser)"

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace condenser.

6.

CHECK IGNITION COIL POWER SUPPLY

1.

Reconnect all harness connectors disconnected.

2.

Disconnect ignition coil harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between ignition coil harness connector and ground.

Condenser

Ground

Voltage

Connector

Terminal

F13

1

Ground

Battery voltage

IPDM E/R

Condenser

Continuity

Connector

Terminal

Connector

Terminal

F12

49

F13

1

Existed

Condenser

Ground

Continuity

Connector

Terminal

F13

2

Ground

Existed

IGNITION SIGNAL

EC-433

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace harness or connectors.

7.

CHECK IGNITION COIL GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check the continuity between ignition coil harness connector and ground.

3.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 8.

NO

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

8.

CHECK IGNITION COIL OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check the continuity between ignition coil harness connector and ECM harness connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 9.

NO

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

9.

CHECK IGNITION COIL WITH POWER TRANSISTOR

Check ignition coil with power transistor. Refer to

EC-434, "Component Inspection (Ignition Coil with Power

Transistor)"

.

Ignition coil

Ground

Voltage

Cylinder

Connector

Terminal

1

F31

3

Ground

Battery voltage

2

F32

3

3

F33

3

4

F34

3

5

F35

3

6

F36

3

Ignition coil

Ground

Continuity

Cylinder

Connector

Terminal

1

F31

2

Ground

Existed

2

F32

2

3

F33

2

4

F34

2

5

F35

2

6

F36

2

Ignition coil

ECM

Continuity

Cylinder

Connector

Terminal

Connector

Terminal

1

F31

1

F7

11

Existed

2

F32

1

10

3

F33

1

9

4

F34

1

15

5

F35

1

14

6

F36

1

13