Infiniti M45 (Y34). Manual — part 425
DTC P0460 FUEL LEVEL SENSOR
EC-389
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EC
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure
ABS002LE
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten two ground screws.
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK FUEL LEVEL SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect “fuel level sensor unit and fuel pump” harness con-
nector.
2.
Turn ignition switch ON.
3.
Check voltage between “fuel level sensor unit and fuel pump”
terminal 5 and ground with CONSULT-II or a tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
107
B
Fuel level sensor ground
[Engine is running]
●
Idle speed
Approximately 0V
119
R/L
Fuel level sensor
[Ignition switch: ON]
Approximately 0 - 4.8V
Output voltage varies with fuel
level.
PBIB1118E
PBIB1127E
Voltage: Battery
voltage
PBIB0134E
EC-390
DTC P0460 FUEL LEVEL SENSOR
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M141, B211
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Harness connectors B61, B261
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Joint connector-15
●
Harness for open or short between combination meter and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK FUEL LEVEL SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect combination meter harness connectors.
3.
Check harness continuity between “fuel level sensor unit and fuel pump” terminal 6 and combination
meter terminal 31. Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M141, B211
●
Harness connectors B61, B261
●
Joint connector-15
●
Harness for open or short between combination meter and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK FUEL LEVEL SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between the following;
ECM terminal 119 and “fuel level sensor unit and fuel pump” terminal 5,
ECM terminal 107 and “fuel level sensor unit and fuel pump” terminal 6.
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
●
Joint connector-15
●
Harness for open or short between ECM and “fuel level sensor and fuel pump”
>> Repair open circuit or short to ground or short to power in harness or connectors.
Continuity should exist.
Continuity should exist.
DTC P0460 FUEL LEVEL SENSOR
EC-391
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EC
8.
CHECK FUEL LEVEL SENSOR
Refer to
FL-3, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"
OK or NG
OK
>> GO TO 9.
NG
>> Replace fuel level sensor unit.
9.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Removal and Installation
ABS002LF
FUEL LEVEL SENSOR
Refer to
FL-3, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"
EC-392
DTC P0461 FUEL LEVEL SENSOR
DTC P0461 FUEL LEVEL SENSOR
PFP:25060
Component Description
ABS002LG
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
ABS002LH
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
ABS002LI
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
.
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-46, "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
.
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
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