Infiniti F50. Manual — part 424
DTC P0442 EVAP CONTROL SYSTEM
EC-337
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EC
14.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Stop engine.
3.
Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
4.
Start engine and let it idle for at least 80 seconds.
5.
Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
OK or NG
OK
>> GO TO 17.
NG
>> GO TO 15.
15.
CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to
.
OK or NG
OK
>> GO TO 16.
NG
>> Repair or reconnect the hose.
16.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to
EC-544, "Component Inspection"
OK or NG
OK
>> GO TO 17.
NG
>> Replace EVAP canister purge volume control solenoid valve.
17.
CHECK FUEL TANK TEMPERATURE SENSOR
Refer to
EC-286, "Component Inspection"
OK or NG
OK
>> GO TO 18.
NG
>> Replace fuel level sensor unit.
18.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to
EC-357, "Component Inspection"
OK or NG
OK
>> GO TO 19.
NG
>> Replace EVAP control system pressure sensor.
19.
CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
Refer to
EC-685, "EVAPORATIVE EMISSION LINE DRAWING"
.
OK or NG
OK
>> GO TO 20.
NG
>> Repair or reconnect the hose.
20.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 21.
Vacuum should exist.
EC-338
DTC P0442 EVAP CONTROL SYSTEM
21.
CHECK REFUELING EVAP VAPOR LINE
Check refuelling EVAP vapor line between EVAP canister and fuel tank for clogging, kink, looseness and
improper connection. For location, refer to
EC-690, "ON BOARD REFUELING VAPOR RECOVERY (ORVR)"
.
OK or NG
OK
>> GO TO 22.
NG
>> Repair or replace hoses and tubes.
22.
CHECK SIGNAL LINE AND RECIRCULATION LINE
Check signal line and recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, loose-
ness and improper connection.
OK or NG
OK
>> GO TO 23.
NG
>> Repair or replace hose, tube or filler neck tube.
23.
CHECK REFUELING CONTROL VALVE
Refer to
EC-693, "Component Inspection"
OK or NG
OK
>> GO TO 24.
NG
>> Replace refueling EVAP vapor cut valve with fuel tank.
24.
CHECK FUEL LEVEL SENSOR
Refer to
DI-26, "CHECK FUEL LEVEL SENSOR UNIT"
OK or NG
OK
>> GO TO 25.
NG
>> Replace fuel level sensor unit.
25.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS00MEH
WATER SEPARATOR
1.
Check visually for insect nests in the water separator air inlet.
2.
Check visually for cracks or flaws in the appearance.
3.
Check visually for cracks or flaws in the hose.
4.
Check that A and C are not clogged by blowing air into B with
A , and then C plugged.
5.
In case of NG in items 2 - 4, replace the parts.
NOTE:
●
Do not disassemble water separator.
PBIB1032E
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-339
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EC
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
PFP:14920
Description
EBS00MEI
SYSTEM DESCRIPTION
*: This signal is sent to the ECM through CAN communication.
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass pas-
sage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP
canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is
determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor
from the EVAP canister is regulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canis-
ter. The EVAP canister purge volume control solenoid valve is
moved by ON/OFF pulses from the ECM. The longer the ON pulse,
the greater the amount of fuel vapor that will flow through the valve.
CONSULT-II Reference Value in Data Monitor Mode
EBS00MEJ
Specification data are reference values.
Sensor
Input Signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed
EVAP canister
purge flow control
EVAP canister purge volume
control solenoid valve
Mass air flow sensor
Amount of intake air
Engine coolant temperature sensor
Engine coolant temperature
Ignition switch
Start signal
Throttle position sensor
Throttle position
Accelerator pedal position sensor
Accelerator pedal position
Heated oxygen sensors 1
Density of oxygen in exhaust gas
(Mixture ratio feedback signal)
Fuel tank temperature sensor
Fuel temperature in fuel tank
Wheel sensor*
Vehicle speed
SEF337U
MONITOR ITEM
CONDITION
SPECIFICATION
PURG VOL C/V
●
Engine: After warming up
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Selector lever: P or N
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Air conditioner switch: OFF
●
No-load
Idle
0%
2,000 rpm
—
EC-340
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
On Board Diagnosis Logic
EBS00MEK
DTC Confirmation Procedure
EBS00MEL
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 battery voltage is more than 11V at idle.
WITH CONSULT-II
1.
Turn ignition switch “ON”.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Start engine and let it idle for at least 13 seconds.
4.
If 1st trip DTC is detected, go to
EC-342, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0444
0444
EVAP canister purge volume
control solenoid valve circuit
open
An excessively low voltage signal is sent
to ECM through the valve
●
Harness or connectors
(The solenoid valve circuit is open or
shorted.)
●
EVAP canister purge volume control
solenoid valve
P0445
0445
EVAP canister purge volume
control solenoid valve circuit
shorted
An excessively high voltage signal is sent
to ECM through the valve
●
Harness or connectors
(The solenoid valve circuit is shorted.)
●
EVAP canister purge volume control
solenoid valve
SEF058Y
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