Infiniti I30 (A33). Manual — part 312
17
ADJUST THROTTLE POSITION SWITCH
Check the following items. Refer to “Basic Inspection”, EC-109.
MTBL0595
Is it possible to adjust closed throttle position switch?
Yes or No
Yes
©
GO TO 18.
No
©
Replace throttle position switch.
18
CHECK EVAP PURGE LINE
Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.
Refer to “EVAPORATIVE EMISSION LINE DRAWING”, EC-36.
OK or NG
OK
©
GO TO 19.
NG
©
Replace it.
19
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
©
GO TO 20.
20
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-144.
©
INSPECTION END
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DTC P1447 EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM PURGE
FLOW MONITORING
Diagnostic Procedure (Cont’d)
EC-563
SEF032W
SEF267X
Component Description
NHEC0338
NOTE:
If DTC P1448 is displayed with P0440, perform trouble diagno-
sis for DTC P1448 first.
The EVAP canister vent control valve is located on the EVAP can-
ister and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is ener-
gized. A plunger will then move to seal the canister vent. The abil-
ity to seal the vent is necessary for the on board diagnosis of other
evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the
evaporative emission control system is depressurized and allows
“EVAP Control System (Small Leak)” diagnosis.
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0339
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
VENT CONT/V
I
Ignition switch: ON
OFF
On Board Diagnosis Logic
NHEC0341
Malfunction is detected when EVAP canister vent control valve
remains opened under specified driving conditions.
Possible Cause
NHEC0591
I
EVAP canister vent control valve
I
EVAP control system pressure sensor and circuit
I
Blocked rubber tube to EVAP canister vent control valve
I
Water separator
I
EVAP canister is saturated with water.
I
Vacuum cut valve
DTC P1448 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL
VALVE (OPEN)
Component Description
EC-564
DTC Confirmation Procedure
NHEC0342
NOTE:
I
If DTC P1448 is displayed with P0440 or P1440, perform
trouble diagnosis for DTC P1448 first.
I
If
“DTC
Confirmation
Procedure”
has
been
previously
conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test.
SEF565X
SEF566X
SEF567X
WITH CONSULT-II
NHEC0342S01
TESTING CONDITION:
I
Perform “DTC WORK SUPPORT” when the fuel level is
between 1/4 to 3/4 full and vehicle is placed on flat level
surface.
I
Always perform test at a temperature of 0 to 30°C (32 to
86°F).
1)
Turn ignition switch “ON”.
2)
Turn ignition switch “OFF” and wait at least 10 seconds.
3)
Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
4)
Make sure that the following conditions are met.
COOLAN TEMP/S
0 - 70°C (32 - 158°F)
INT/A TEMP SE
0 - 30°C (32 - 86°F)
5)
Select “EVAP SML LEAK P0440/P1440” of “EVAPORATIVE
SYSTEM” in “DTC WORK SUPPORT” mode with CONSULT-
II.
Follow the instruction displayed.
If the engine speed cannot be maintained within the range
displayed on the CONSULT-II screen, go to “Basic Inspection”,
EC-109.
6)
Make sure that “OK” is displayed.
If “NG” is displayed, go to the following step.
NOTE:
Make sure that EVAP hoses are connected to EVAP canister
purge volume control solenoid valve properly.
7)
Stop engine and wait at least 10 seconds, then turn “ON”.
8)
Disconnect hose from water separator.
9)
Select “VENT CONTROL/V” of “ACTIVE TEST” mode with
CONSULT-II.
10) Touch “ON” and “OFF” alternately.
SEF223Y
11) Make sure the following.
Condition
VENT CONTROL/V
Air passage continuity
between A and B
ON
No
OFF
Yes
If the result is NG, go to “Diagnostic Procedure”, EC-568.
If the result is OK, go to “Diagnostic Procedure” for DTC
P0440, EC-364.
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DTC P1448 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL
VALVE (OPEN)
DTC Confirmation Procedure
EC-565
AEC783A
Overall Function Check
NHEC0343
Use this procedure to check the overall function of the EVAP can-
ister vent control valve circuit. During this check, a DTC might not
be confirmed.
WITH GST
NHEC0343S01
1)
Disconnect hose from water separator.
2)
Disconnect EVAP canister vent control valve harness connec-
tor.
3)
Verify the following.
Condition
Air passage continuity
12V direct current supply between ter-
minals 1 and 2
No
No supply
Yes
If the result is NG, go to “Diagnostic Procedure”, EC-568.
If the result is OK, go to “Diagnostic Procedure” for DTC
P0440, EC-364.
DTC P1448 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL
VALVE (OPEN)
Overall Function Check
EC-566
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