Infiniti I30 (A33). Manual — part 276
SEF614X
Component Description
=NHEC0622
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 side
is variable resistor. Fuel level sensor output voltage changes
depending on the movement of the fuel mechanical float.
On Board Diagnostic Logic
NHEC0623
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.
Malfunction is detected when 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.
Possible Cause
NHEC0624
I
Harness or connectors
(The level sensor circuit is open or shorted.)
I
Fuel level sensor
Overall Function Check
NHEC0625
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 FE-5 “Fuel Tank”.
TESTING CONDITION:
Before starting overall function check, preparation of draining
fuel and refilling fuel is required.
SEF195Y
WITH CONSULT-II
NHEC0625S01
NOTE:
Start from step 11, 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 “Fuel Pressure
Release”, EC-49.
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.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0461 FUEL LEVEL SENSOR FUNCTION
Component Description
EC-419
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 CON-
SULT-II.
9)
Touch “ON” and drain fuel approximately 30
(7-7/8 US gal,
6-5/8 Imp gal) and stop it.
10) Fill fuel into the fuel tank for 30
(7-7/8 US gal, 6-5/8 Imp gal).
11) Check “FUEL LEVEL SE” output voltage and note it.
12) Check “FUEL LEVEL SE” output voltage and confirm whether
the voltage changes more than 0.03V during step 7 to 11.
If NG, check the fuel level sensor, refer to EL-162, “FUEL
LEVEL SENSOR UNIT CHECK”.
SEF615X
WITH GST
NHEC0625S02
NOTE:
Start from step 11, 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 “Fuel Pressure
Release”, EC-49.
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 83 (fuel level
sensor signal) and ground.
7)
Turn ignition switch “ON”.
8)
Check voltage between ECM terminal 83 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 83 and ground
changes more than 0.03V during step 8 - 10.
If NG, check component of fuel level sensor, refer to EL-162,
“FUEL LEVEL SENSOR UNIT CHECK”.
DTC P0461 FUEL LEVEL SENSOR FUNCTION
Overall Function Check (Cont’d)
EC-420
SEF614X
Component Description
NHEC0626
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 side
is variable resistor. Fuel level sensor output voltage changes
depending on the movement of the fuel mechanical float.
On Board Diagnostic Logic
NHEC0627
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.
Malfunction is detected when an excessively low or high voltage is
sent from the sensor is sent to ECM.
Possible Cause
NHEC0628
I
Fuel level sensor circuit
(The fuel level sensor circuit is open or shorted.)
I
Fuel level sensor
DTC Confirmation Procedure
NHEC0629
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 bat-
tery voltage is more than 11V at ignition switch “ON”.
SEF195Y
WITH CONSULT-II
NHEC0629S01
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 “Diagnostic Procedure”,
EC-423.
WITH GST
NHEC0629S02
Follow the procedure “WITH CONSULT-II” above.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0464 FUEL LEVEL SENSOR CIRCUIT
Component Description
EC-421
Wiring Diagram
NHEC0630
MEC227D
DTC P0464 FUEL LEVEL SENSOR CIRCUIT
Wiring Diagram
EC-422
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст