Infiniti I35 (A33). Manual — part 269
21
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
©
GO TO 22.
22
CHECK REFUELING EVAP VAPOR LINE
Check refueling EVAP vapor line between EVAP canister and fuel tank for clogging, kink, looseness and improper connec-
tion. For location, refer to “EVAPORATIVE EMISSION LINE DRAWING”, EC-41.
OK or NG
OK
©
GO TO 23.
NG
©
Repair or replace hoses and tubes.
23
CHECK SIGNAL LINE AND RECIRCULATION LINE
Check signal line and recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, looseness and
improper connection.
OK or NG
OK
©
GO TO 24.
NG
©
Repair or replace hoses, tubes or filler neck tube.
24
CHECK REFUELING CONTROL VALVE
1. Remove fuel filler cap.
2. Check air continuity between hose ends A and B.
Blow air into hose end B. Air should flow freely into the fuel tank.
3. Blow air into hose end A and check that there is no leakage.
4. Apply pressure to both hose ends A and B [20 kPa (150 mmHg, 5.91 inHg)] using a pressure pump and a suitable
3-way connector. Check that there is no leakage.
SEF830X
OK or NG
OK
©
GO TO 25.
NG
©
Replace or refueling control valve with fuel tank.
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DTC P0456 EVAP CONTROL SYSTEM
Diagnostic Procedure (Cont’d)
EC-417
25
CHECK FUEL LEVEL SENSOR
Refer to EL-140, “Fuel Level Sensor Unit Check”.
OK or NG
OK
©
GO TO 26.
NG
©
Replace fuel level sensor unit.
26
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-152.
©
INSPECTION END
DTC P0456 EVAP CONTROL SYSTEM
Diagnostic Procedure (Cont’d)
EC-418
SEC088D
Component Description
NHEC0991
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
variable resistor. Fuel level sensor output voltage changes depend-
ing on the movement of the fuel mechanical float.
On Board Diagnostic Logic
NHEC0992
When the vehicle is parked, naturally the fuel level in the fuel tank
is stable. It means that output signal of the fuel level sensor does
not change. If ECM senses sloshing signal from the sensor, fuel
level sensor malfunction is detected.
DTC No.
Trouble diagnosis
name
DTC Detecting Condition
Possible Cause
P0460
0460
Fuel level sensor cir-
cuit noise
Even though the vehicle is parked, a signal being
varied is sent from the fuel level sensor to ECM.
I
Fuel level sensor circuit
(The fuel level sensor circuit is open
or shorted.)
I
Fuel level sensor
SEF195Y
DTC Confirmation Procedure
NHEC0993
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.
WITH CONSULT-II
NHEC0993S01
1)
Turn ignition switch ON.
2)
Select “DATA MONITOR” mode with CONSULT-II.
3)
Start engine and wait maximum of 2 consecutive minutes.
4)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-421.
WITH GST
NHEC0993S02
Follow the procedure “WITH CONSULT-II” above.
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DTC P0460 FUEL LEVEL SENSOR
Component Description
EC-419
Wiring Diagram
NHEC0994
MEC637E
SEF711YB
DTC P0460 FUEL LEVEL SENSOR
Wiring Diagram
EC-420
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