Infiniti I30 (A33). Manual — part 309
10
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
SEF268X
2. Check connectors for water.
Water should not exist.
OK or NG
OK
©
GO TO 11.
NG
©
Replace EVAP control system pressure sensor.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1446 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL
VALVE (CLOSE)
Diagnostic Procedure (Cont’d)
EC-551
11
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pressure sensor with its harness connector connected.
CAUTION:
I
Never apply force to the air hole protector of the sensor if equipped.
SEF799W
2. Remove hose from EVAP control system pressure sensor.
3. Turn ignition switch “ON”.
4. Use pump to apply vacuum and pressure to EVAP control system pressure sensor as shown in figure.
CAUTION:
I
Always calibrate the vacuum pump gauge when using it.
I
Do not apply below −20 kPa (−150 mmHg, −5.91 inHg) or over 20 kPa (150 mmHg, 5.91 inHg) of pressure.
5. Check input voltage between ECM terminal 84 and ground.
SEF342X
CAUTION:
I
Discard and EVAP control system pressure sensor which has been dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one.
OK or NG
OK
©
GO TO 12.
NG
©
Replace EVAP control system pressure sensor.
12
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-144.
©
INSPECTION END
DTC P1446 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL
VALVE (CLOSE)
Diagnostic Procedure (Cont’d)
EC-552
System Description
NHEC0333
NOTE:
If DTC P1447 is displayed with P0510, perform trouble diagnosis for DTC P0510 first. (See EC-438.)
SEF323U
In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions.
Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP
canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP con-
trol system pressure sensor to intake manifold vacuum.
On Board Diagnosis Logic
NHEC0334
Under normal conditions (non-closed throttle), sensor output volt-
age indicates if pressure drop and purge flow are adequate. If not,
a fault is determined.
Malfunction is detected when EVAP control system does not oper-
ate properly, EVAP control system has a leak between intake mani-
fold and EVAP control system pressure sensor.
Possible Cause
NHEC0590
I
EVAP canister purge volume control solenoid valve stuck
closed
I
EVAP control system pressure sensor and the circuit
I
Loose, disconnected or improper connection of rubber tube
I
Blocked rubber tube
I
Cracked EVAP canister
I
EVAP canister purge volume control solenoid valve circuit
I
Closed throttle position switch
I
Blocked purge port
I
EVAP canister vent control valve
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1447 EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM PURGE
FLOW MONITORING
System Description
EC-553
SEF207Y
DTC Confirmation Procedure
NHEC0335
SEF208Y
SEF238Y
CAUTION:
Always drive vehicle at a safe speed.
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.
WITH CONSULT-II
NHEC0335S01
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 70 seconds.
4)
Select “PURG FLOW P1447” of “EVAPORATIVE SYSTEM” in
“DTC CONFIRMATION” mode with CONSULT-II.
5)
Touch “START”.
If “COMPLETED” is displayed, go to step 7.
6)
When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions
continuously until “TESTING” changes to “COMPLETED”. (It
will take at least 35 seconds.)
Selector lever
Suitable position
Vehicle speed
32 - 120 km/h (20 - 75 MPH)
ENG SPEED
500 - 3,000 rpm
B/FUEL SCHDL
1.3 - 8.1 msec
Engine coolant temperature
70 - 100°C (158 - 212°F)
If “TESTING” is not changed for a long time, 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-556.
SEF355X
Overall Function Check
NHEC0336
Use this procedure to check the overall monitoring function of the
EVAP control system purge flow monitoring. During this check, a
1st trip DTC might not be confirmed.
WITH GST
NHEC0336S01
1)
Lift up drive wheels.
2)
Start engine (TCS switch “OFF”) and warm it up to normal
operating temperature.
3)
Turn ignition switch “OFF”, wait at least 10 seconds.
4)
Start engine and wait at least 70 seconds.
DTC P1447 EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM PURGE
FLOW MONITORING
DTC Confirmation Procedure
EC-554
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