Nissan Frontier. Instruction — part 664
P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-1227
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
C
D
E
F
G
H
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J
K
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A
EC
N
P
O
With CONSULT
1. Reconnect all harness connectors disconnected.
2. Start engine.
3. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT. Check that engine speed varies
according to the valve opening.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-1227, "Component Inspection"
.
OK or NG
OK
>> GO TO 6.
NG
>> Replace EVAP canister purge volume control solenoid valve. Refer to
.
6.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000009481867
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.
Without CONSULT
Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.
Condition
(PURG VOL CONT/V value)
Air passage continuity
between (A) and (B)
100%
Yes
0%
No
PBIB2058E
Condition
Air passage continuity
between (A) and (B)
12V direct current supply between
terminals 1 and 2
Yes
No supply
No
PBIB2059E
EC-1228
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component Description
INFOID:0000000009481868
The EVAP control system pressure sensor (2) detects pressure in
the purge line. The sensor output voltage to the ECM increases as
pressure increases.
• EVAP canister vent control valve (1)
• Drain filter (3)
• EVAP canister (4)
•
: Vehicle front
On Board Diagnosis Logic
INFOID:0000000009481869
If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
.
DTC Confirmation Procedure
INFOID:0000000009481870
DTC CONFIRMATION PROCEDURE
NOTE:
Never remove fuel filler cap during DTC confirmation procedure.
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
With CONSULT>>GO TO 2.
Without CONSULT>>GO TO 5.
2.
PERFORM DTC CONFIRMATION PROCEDURE-1
With CONSULT
1. Start engine and let it idle for least 40 seconds.
NOTE:
Do not depress accelerator pedal even slightly.
ALBIA0514ZZ
PBIB3370E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0451
0451
EVAP control system
pressure sensor perfor-
mance
ECM detects a sloshing signal from the EVAP
control system pressure sensor
• Harness or connectors
• EVAP control system pressure sensor
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-1229
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
EC-1229, "Diagnosis Procedure"
.
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE-2
With CONSULT
1. Select “EVAP DIAG READY” in “DATA MONITOR” mode of “ENGINE”.
2. Let it idle until “OFF” of “EVAP DIAG READY” changes to “ON”.
NOTE:
It will take at most 2 hours until “OFF” of “EVAP DIAG READY” changes to “ON”.
3. Turn ignition switch OFF and wait at least 90 minutes.
NOTE:
Never turn ignition switch ON during 90 minutes.
4. Turn ignition switch ON.
5. Select “EVAP LEAK DIAG” in “DATA MONITOR” mode of “ENGINE”.
6. Check that “EVAP LEAK DIAG” indication.
Which is displayed on CONSULT?
CMPLT >> GO TO 4.
YET
>> 1. Perform DTC CONFIRMATION PROCEDURE again.
2. GO TO 1.
4.
PERFORM DTC CONFIRMATION PROCEDURE-3
With CONSULT
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
EC-1229, "Diagnosis Procedure"
.
NO
>> INSPECTION END
5.
PERFORM DTC CONFIRMATION PROCEDURE-4
With GST
1. Start engine and let it idle for least 40 seconds.
NOTE:
Do not depress accelerator pedal even slightly.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
EC-1229, "Diagnosis Procedure"
.
NO
>> GO TO 6.
6.
PERFORM DTC CONFIRMATION PROCEDURE-5
With GST
1. Let it idle for at least 2 hours.
2. Turn ignition switch OFF and wait at least 90 minutes.
NOTE:
Never turn ignition switch ON during 90 minutes.
3. Turn ignition switch ON.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
EC-1229, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009481871
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
EC-1230
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
2. Loosen and retighten three ground screws on the body. Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK EVPA CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
1. Disconnect EVAP control system pressure sensor (2) harness
connector.
-
EVAP canister vent control valve (1)
-
Drain filter (3)
-
EVAP canister (4)
-
: Vehicle front
2. Check sensor harness connector for water.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace harness connector.
3.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-1230, "Component Inspection"
.
OK or NG
OK
>> GO TO 4.
NG
>> Replace EVAP control system pressure sensor. Refer to
FL-14, "Removal and Installation"
.
4.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000009481872
EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Do not reuse the O-ring, replace it with a new one.
2. Install a vacuum pump to EVAP control system pressure sensor.
3. Turn ignition switch ON and check output voltage between ECM
terminal 32 and ground under the following conditions.
CAUTION:
• Always calibrate the vacuum pump gauge when using it.
BBIA0539E
Water should not exist.
ALBIA0514ZZ
Applied vacuum kPa
(kg/cm
2
, psi)
Voltage V
Not applied
1.8 - 4.8
-26.7 (-0.272, -3.87)
2.1 to 2.5V lower than above value
PBIB1173E
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