Infiniti F50. Manual - part 437

 

  Index      Infiniti     Infiniti F50 - service repair manual 2006 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  435  436  437  438   ..

 

 

Infiniti F50. Manual - part 437

 

 

DTC P0461 FUEL LEVEL SENSOR

EC-389

C

D

E

F

G

H

I

J

K

L

M

A

EC

DTC P0461 FUEL LEVEL SENSOR

PFP:25060

Component Description

EBS00MFP

The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the ECM.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.

On Board Diagnosis Logic

EBS00MFQ

Driving long distances naturally affect fuel gauge level.
This diagnosis detects the fuel gauge malfunction of the gauge not moving even after a long distance has
been driven.

Overall Function Check

EBS00MFR

Use this procedure to check the overall function of the fuel level sensor function. During this check, a 1st trip
DTC might not be confirmed.

WARNING:

When performing following procedure, be sure to observe the handling of the fuel. Refer to 

FL-9,

"FUEL TANK"

 .

TESTING CONDITION:
Before starting overall function check, preparation of draining fuel and refilling fuel is required.

 WITH CONSULT-II

NOTE:
Start from step 10, if it is possible to confirm that the fuel cannot be drained by 30   (7-7/8 US gal, 6-5/
8 Imp gal) in advance.
1.

Prepare a fuel container and a spare hose.

2.

Release fuel pressure from fuel line, refer to 

EC-48, "FUEL PRESSURE RELEASE"

 .

3.

Remove the fuel feed hose on the fuel level sensor unit.

4.

Connect a spare fuel hose where the fuel feed hose was removed.

5.

Turn ignition switch “OFF” and wait at least 10 seconds then turn “ON”.

6.

Select “FUEL LEVEL SE” in “DATA MONITOR” mode with CONSULT-II.

7.

Check “FUEL LEVEL SE” output voltage and note it.

8.

Select “FUEL PUMP” in “ACTIVE TEST” mode with CONSULT-
II.

9.

Touch “ON” and drain fuel approximately 30   (7-7/8 US gal, 6-
5/8 Imp gal) and stop it.

10. Check “FUEL LEVEL SE” output voltage and note it.

11. Fill fuel into the fuel tank for 30   (7-7/8 US gal, 6-5/8 Imp gal).

12. Check “FUEL LEVEL SE” output voltage and note it.
13. Confirm whether the voltage changes more than 0.03V during

step 7 to 10 and 10 to 12.
If NG, check the fuel level sensor, refer to 

DI-26, "CHECK FUEL

LEVEL SENSOR UNIT"

 .

PBIB1241E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0461
0461

Fuel level sensor circuit 
range/performance

The output signal of the fuel level sensor does not 
change within the specified range even though 
the vehicle has been driven a long distance.

Harness or connectors
(The sensor circuit is open or shorted)

Fuel level sensor

SEF195Y

EC-390

DTC P0461 FUEL LEVEL SENSOR

 WITH GST

NOTE:
Start from step 8, if it is possible to confirm that the fuel cannot be drained by 30   (7-7/8 US gal, 6-5/8
Imp gal) in advance.
1.

Prepare a fuel container and a spare hose.

2.

Release fuel pressure from fuel line, refer to 

EC-48, "FUEL PRESSURE RELEASE"

 .

3.

Remove the fuel feed hose on the fuel level sensor unit.

4.

Connect a spare fuel hose where the fuel feed hose was removed.

5.

Turn ignition switch “OFF”.

6.

Set voltmeters probe between ECM terminal 119 (fuel level sen-
sor signal) and ground.

7.

Turn ignition switch “ON”.

8.

Check voltage between ECM terminal 119 and ground and note
it.

9.

Drain fuel by 30   (7-7/8 US gal, 6-5/8 Imp gal) from the fuel
tank using proper equipment.

10. Fill fuel into the fuel tank for 30   (7-7/8 US gal, 6-5/8 Imp gal).

11. Confirm that the voltage between ECM terminal 119 and ground

changes more than 0.03V during step 8 - 10.
If NG, check component of fuel level sensor, refer to 

DI-26,

"CHECK FUEL LEVEL SENSOR UNIT"

 .

PBIB1149E

DTC P0462, P0463 FUEL LEVEL SENSOR

EC-391

C

D

E

F

G

H

I

J

K

L

M

A

EC

DTC P0462, P0463 FUEL LEVEL SENSOR

PFP:25060

Component Description

EBS00MFS

The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the ECM.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.

On Board Diagnosis Logic

EBS00MFT

ECM receives two signals from the fuel level sensor circuit.
One is fuel level sensor power supply circuit, and the other is fuel level sensor ground circuit.
This diagnosis indicates the former, to detect open or short circuit malfunction.

DTC Confirmation Procedure

EBS00MFU

NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at ignition
switch “ON”.

 WITH CONSULT-II

1.

Turn ignition switch “ON”.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Wait at least 5 seconds.

4.

If 1st trip DTC is detected, go to 

EC-393, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

PBIB1241E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0462
0462

Fuel level sensor circuit 
low input

An excessively low voltage is sent from the 
sensor is sent to ECM.

Harness or connectors
(The sensor circuit is open or shorted)

Fuel level sensor

P0463
0463

Fuel level sensor circuit 
high input

An excessively high voltage is sent from the 
sensor is sent to ECM.

SEF195Y

EC-392

DTC P0462, P0463 FUEL LEVEL SENSOR

Wiring Diagram

EBS00MFV

TBWM0159E

 

 

 

 

 

 

 

Content   ..  435  436  437  438   ..