Infiniti F50. Manual - part 507

 

  Index      Infiniti     Infiniti F50 - service repair manual 2006 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  505  506  507  508   ..

 

 

Infiniti F50. Manual - part 507

 

 

FUEL PUMP CIRCUIT

EC-669

C

D

E

F

G

H

I

J

K

L

M

A

EC

3. 

DETECT MALFUNCTIONING PART

Check the following.

Fuse block (J/B) No. 1 connector M1

Fuse block (J/B) No. 2 connectors M143, M145

Joint connector-19

15A fuses

Harness for open or short between fuse and fuel pump relay

>> Repair harness or connectors.

4. 

CHECK FUEL PUMP POWER SUPPLY AND GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch “OFF”.

2.

Disconnect fuel level sensor unit and fuel pump harness con-
nector.

3.

Disconnect dropping resistor harness connector.

4.

Check harness continuity between 
fuel pump relay terminal 5 and fuel pump terminal 3, 
fuel pump terminal 1 and dropping resistor terminal 2,
dropping resistor terminal 1 and body ground.
Refer to Wiring Diagram.

5.

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

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

PBIB1249E

Continuity should exist.

PBIB0032E

EC-670

FUEL PUMP CIRCUIT

5. 

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors B211, M141

Harness connectors B63, B263

Fuse block (J/B) No. 2 connectors M143, M145

Harness for open or short between fuel pump relay and fuel pump

Harness for open or short between fuel pump and dropping resistor

Harness for open or short between dropping resistor and body ground

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

6. 

CHECK FUEL PUMP RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 41 and fuel pump relay terminal 1.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors M135, F105

Harness for open or short between ECM and fuel pump relay

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

8. 

CHECK DROPPING RESISTOR

Refer to 

EC-671, "Component Inspection"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Replace dropping resistor.

9. 

CHECK FUEL PUMP RELAY

Refer to 

EC-671, "Component Inspection"

 .

OK or NG

OK

>> GO TO 10.

NG

>> Replace fuel pump relay.

10. 

CHECK FUEL PUMP

Refer to 

EC-671, "Component Inspection"

 .

OK or NG

OK

>> GO TO 11.

NG

>> Replace fuel pump.

Continuity should exist.

FUEL PUMP CIRCUIT

EC-671

C

D

E

F

G

H

I

J

K

L

M

A

EC

11. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

EBS00MOE

FUEL PUMP RELAY

Check continuity between terminals 3 and 5 under the following con-
ditions.

FUEL PUMP

1.

Disconnect fuel level sensor unit and fuel pump harness connector.

2.

Check resistance between fuel level sensor unit and fuel pump
terminals 1 and 3.

DROPPING RESISTOR

Check resistance between dropping resistor terminals 1 and 2.

Removal and Installation

EBS00MOF

FUEL PUMP

Refer to 

FL-3, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"

 .

Conditions

Continuity

12V direct current supply 
between terminals 1 and 2

Yes

No current supply

No

PBIB0098E

Resistance: 0.2 - 5.0

 [at 25

°

C (77

°

F)]

PBIB0186E

Resistance: Approximately 0.9

 at 20

°

C (68

°

F)

PBIB0100E

EC-672

REFRIGERANT PRESSURE SENSOR

REFRIGERANT PRESSURE SENSOR

PFP:92136

Component Description

EBS00MOG

The refrigerant pressure sensor is installed at the liquid tank of the
air conditioner system. The sensor uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan system.

PBIB0037E

SEF099XA

 

 

 

 

 

 

 

Content   ..  505  506  507  508   ..