Nissan Titan A60. Instruction — part 408
EC-298
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component Description
INFOID:0000000006158727
The EVAP control system pressure sensor (2) detects pressure in the purge line. The sensor output voltage to
the ECM increases as pressure increases.
On Board Diagnosis Logic
INFOID:0000000006158728
NOTE:
If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
.
DTC Confirmation Procedure
INFOID:0000000006158729
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before con-
ducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c.
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.
4. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000006158730
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
1
: Drain filter
3
: EVAP canister
4
: EVAP canister vent control value
ALBIA0401ZZ
PBIB1207E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0451
0451
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
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-299
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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2. Loosen and retighten three ground screws on the body.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
1. Disconnect EVAP control system pressure sensor (2) harness
connector.
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-299, "Component Inspection"
OK or NG
OK
>> GO TO 4.
NG
>> Replace EVAP control system pressure sensor.
4.
CHECK INTERMITTENT INCIDENT
GI-36, "How to Check Terminal"
GI-39, "Intermittent Incident"
For wiring diagram, refer to
>> INSPECTION END
Component Inspection
INFOID:0000000006158731
EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Always replace O-ring with a new one.
2. Install a vacuum pump to EVAP control system pressure sensor.
BBIA0354E
1
: Drain filter
3
: EVAP canister
4
: EVAP canister vent control value
Water should not exist.
ALBIA0401ZZ
EC-300
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0451 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.
• Do not apply below -93.3 kPa (-700 mmHg, -27.56 inHg) or
pressure over 101.3 kPa (760 mmHg, 29.92 inHg).
4. If NG, replace EVAP control system pressure sensor.
Applied vacuum kPa
(mmHg, inHg)
Voltage V
Not applied
1.8 - 4.8
-26.7 (-200, -7.87)
2.1 to 2.5V lower than above value
PBIB1173E
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-301
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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EC
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P
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P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component Description
INFOID:0000000006158732
The EVAP control system pressure sensor (2) detects pressure in the purge line. The sensor output voltage to
the ECM increases as pressure increases.
On Board Diagnosis Logic
INFOID:0000000006158733
NOTE:
If DTC P0452 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
.
DTC Confirmation Procedure
INFOID:0000000006158734
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1. Turn ignition swich OFF and wait at least 10 seconds.
2. Turn ignition swich ON.
3. Turn ignition swich OFF and wait at least 10 seconds.
TESTING CONDITION:
Always perform test at a temperature of 5
°C (41°F) or more.
WITH CONSULT-III
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 “DATA MONITOR” mode with CONSULT-III.
1
: Drain filter
3
: EVAP canister
4
: EVAP canister vent control value
ALBIA0401ZZ
PBIB1207E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0452
0452
EVAP control system pressure
sensor low input
An excessively low voltage from the sen-
sor is sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted.)
• EVAP control system pressure sensor
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