Infiniti I35 (A33). Manual — part 301
Description
NHEC1089
SYSTEM DESCRIPTION
NHEC1089S01
Sensor
Input Signal to ECM
ECM
function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed
EVAP can-
ister 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 sensor 1
Density of oxygen in exhaust gas
(Mixture ratio feedback signal)
Fuel tank temperature sensor
Fuel temperature in fuel tank
Vehicle speed sensor
Vehicle speed
This system controls flow rate of fuel vapor from the EVAP canis-
ter. The opening of the vapor by-pass passage in the EVAP canis-
ter 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 consider-
ing 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.
SEF337U
COMPONENT DESCRIPTION
NHEC1089S02
The EVAP canister purge volume control solenoid valve uses a
ON/OFF duty to control the flow rate of fuel vapor from the EVAP
canister. 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
NHEC1090
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
PURG VOL C/V
I
Engine: After warming up
I
Air conditioner switch OFF
I
Shift lever: N
I
No-load
Idle (Vehicle stopped)
0%
2,000 rpm
—
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Description
EC-545
On Board Diagnosis Logic
NHEC1092
DTC No.
Trouble diagnosis
name
DTC Detecting Condition
Possible Cause
P1444
1444
EVAP canister purge
volume control sole-
noid valve
The canister purge flow is detected during the
specified driving conditions, even when EVAP can-
ister purge volume control solenoid valve is com-
pletely closed.
I
EVAP control system pressure sensor
I
EVAP canister purge volume control
solenoid valve (The valve is stuck
open.)
I
EVAP canister vent control valve
I
EVAP canister
I
Hoses
(Hoses are connected incorrectly or
clogged.)
DTC Confirmation Procedure
NHEC1093
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:
Always perform test at a temperature of 5°C (41°F) or more.
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
On Board Diagnosis Logic
EC-546
SEC143D
SEC144D
SEF237Y
WITH CONSULT-II
NHEC1093S01
1)
Start engine and warm it up to normal operating temperature.
2)
Turn ignition switch OFF and wait at least 10 seconds.
3)
Turn ignition switch ON.
4)
Select “PURG VOL CN/V P1444” of “EVAPORATIVE SYS-
TEM” in “DTC WORK SUPPORT” mode with CONSULT-II.
5)
Touch “START”.
6)
Start engine and let it idle until “TESTING” on CONSULT-II
changes to “COMPLETED”. (It will take for approximately 10
seconds.)
If “TESTING” is not displayed after 5 minutes, retry from
step 2.
7)
Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”.
If
“NG”
is
displayed,
refer
to
“Diagnostic
Procedure”, EC-550.
WITH GST
NHEC1093S02
1)
Start engine and warm it up to normal operating temperature.
2)
Turn ignition switch OFF and wait at least 10 seconds.
3)
Start engine and let it idle for at least 20 seconds.
4)
Select “MODE 7” with GST.
5)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-550.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
DTC Confirmation Procedure (Cont’d)
EC-547
Wiring Diagram
NHEC1094
MEC552D
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Wiring Diagram
EC-548
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