Nissan Versa Sedan. Instruction — part 326
P0448 EVAP CANISTER VENT CONTROL VALVE
EC-303
< DTC/CIRCUIT DIAGNOSIS >
[HR16DE]
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Component Inspection
INFOID:0000000009620490
1.
CHECK EVAP CANISTER VENT CONTROL VALVE-I
1. Turn ignition switch OFF.
2. Remove EVAP canister vent control valve from EVAP canister.
3. Check portion (A) of EVAP canister vent control valve for being
rusted.
Is it rusted?
YES
>> Replace EVAP canister vent control valve. Refer to
15, "Removal and Installation"
.
NO
>> GO TO 2.
2.
CHECK EVAP CANISTER VENT CONTROL VALVE-II
With CONSULT
1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Perform “VENT CONTROL/V” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
4. Check air passage continuity and operation delay time.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Without CONSULT
Check air passage continuity and operation delay time under the fol-
lowing conditions.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace EVAP canister vent control valve. Refer to
FL-15, "Removal and Installation"
.
3.
CHECK EVAP CANISTER VENT CONTROL VALVE-III
With CONSULT
1. Clean the air passage [portion (A) to (B)] of EVAP canister vent control valve using an air blower.
2. Perform “VENT CONTROL/V” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
JMBIA0168ZZ
VENT CONT/V condition
Air passage continuity between (A) and (B)
ON
Not existed
OFF
Existed
Condition
Air passage continuity between (A) and (B)
12 V direct current supply between
terminals (1) and (2)
Not existed
OFF
Existed
JMBIA0169ZZ
EC-304
< DTC/CIRCUIT DIAGNOSIS >
[HR16DE]
P0448 EVAP CANISTER VENT CONTROL VALVE
3. Check air passage continuity and operation delay time.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Without CONSULT
1. Clean the air passage [portion (A) to (B)] of EVAP canister vent
control valve using an air blower.
2. Check air passage continuity and operation delay time under the
following conditions.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace EVAP canister vent control valve. Refer to
FL-15, "Removal and Installation"
.
VENT CONT/V condition
Air passage continuity between (A) and (B)
ON
Not existed
OFF
Existed
Condition
Air passage continuity between (A) and (B)
12 V direct current supply between
terminals (1) and (2)
Not existed
OFF
Existed
JMBIA0169ZZ
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-305
< DTC/CIRCUIT DIAGNOSIS >
[HR16DE]
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P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
DTC Logic
INFOID:0000000009267184
DTC DETECTION LOGIC
NOTE:
If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
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.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and wait at least 40 seconds.
NOTE:
Do not depress accelerator pedal even slightly.
3. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009267185
1.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
1. Turn ignition switch OFF.
2. Disconnect EVAP control system pressure sensor harness connector.
3. Check sensor harness connector for water.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace harness connector.
DTC No.
Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0451
EVAP SYS PRES SEN
(EVAP control system pressure
sensor performance)
ECM detects a sloshing signal from
the EVAP control system pressure
sensor
• Harness or connectors
(EVAP control system pressure sensor circuit is
shorted.)
[Crankshaft position sensor (POS) circuit is
shorted.]
(Battery current sensor circuit is shorted.)
(Refrigerant pressure sensor circuit is shorted.)
(Accelerator pedal position sensor 2 circuit is
shorted.)
• EVAP control system pressure sensor
• Crankshaft position sensor (POS)
• Battery current sensor
• Refrigerant pressure sensor
• Accelerator pedal position sensor
Water should not exist.
EC-306
< DTC/CIRCUIT DIAGNOSIS >
[HR16DE]
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
2.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY
1. Turn ignition switch ON.
2. Check the voltage between EVAP control system pressure sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 3.
3.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector.
4. Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts
4.
CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
*: With A/C models
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair short to ground or short to power in harness or connectors.
5.
CHECK COMPONENTS
Check the following.
• Battery current sensor (Refer to
EC-368, "Component Inspection"
).
• CKP sensor (POS) (Refer to
EC-274, "Component Inspection"
• Refrigerant pressure sensor (Refer to
EC-448, "Component Function Check"
).
• Accelerator pedal position sensor (Refer to
EC-410, "Component Inspection"
).
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-45, "Intermittent Incident"
.
NO
>> Replace malfunctioning component.
6.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT
EVAP control system pressure sensor
Ground
Voltage
(Approx.)
Connector
Terminal
B3
3
Ground
5 V
EVAP control system pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
B3
3
F11
71
Existed
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
F11
71
EVAP control system pressure sen-
sor
B3
3
Battery current sensor
F9
1
75
CKP sensor (POS)
F15
1
E16
101
Refrigerant pressure sensor
*
E17
3
102
Accelerator pedal position sensor 2
E12
5
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