Infiniti QX4 (R50). Manual — part 269
DTC Confirmation Procedure
NBEC0323
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 0°C (32°F) or more.
SEF205Y
SEF206Y
SEF237Y
WITH CONSULT-II
NBEC0323S01
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-545.
WITH GST
NBEC0323S02
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-545.
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
DTC Confirmation Procedure
EC-543
Wiring Diagram
NBEC0324
MEC962C
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Wiring Diagram
EC-544
Diagnostic Procedure
NBEC0325
1
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect EVAP canister purge volume control solenoid valve harness connector.
SEF986Y
3. Turn ignition switch “ON”.
4. Check voltage between EVAP canister purge volume control solenoid valve terminal 1 and engine ground with CON-
SULT-II or tester.
SEF333X
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 2.
2
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M32, F23
I
Fuse block (J/B) connector M10
I
10A fuse
I
Harness for open or short between EVAP canister purge volume control solenoid valve and fuse
©
Repair harness or connectors.
3
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 1 and EVAP canister purge volume control solenoid valve terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 4.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Diagnostic Procedure
EC-545
4
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR HOSE
Check disconnection or improper connection of hose connected to EVAP control system pressure sensor.
SEF495R
OK or NG
OK
©
GO TO 5.
NG
©
Repair it.
5
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.
Water should not exist.
OK or NG
OK
©
GO TO 6.
NG
©
Replace EVAP control system pressure sensor.
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont’d)
EC-546
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