Nissan Titan. Instruction — part 255
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-321
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component Description
INFOID:0000000009886732
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:0000000009886733
NOTE:
If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
.
DTC Confirmation Procedure
INFOID:0000000009886734
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
1
: Drain filter
3
: EVAP canister
4
: EVAP canister vent control value
ALBIA0401ZZ
PBIB1207E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0453
0453
EVAP control system pressure
sensor high input
An excessively high voltage from the
sensor is sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted.)
• EVAP control system pressure sensor
• EVAP canister vent control valve
• EVAP canister
• Drain filter
• Rubber hose from EVAP canister vent
control valve to drain filter
EC-322
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
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.
5. Make sure that “FUEL T/TMP SE” is more than 0
°C (32°F).
6. Start engine and wait at least 20 seconds.
7. Check 1st trip DTC.
8. If 1st trip DTC is detected, go to
With GST
1. Start engine and warm it up to normal operating temperature.
2. Check that voltage between ECM terminal 107 (Fuel tank tem-
perature sensor signal) and ground is less than 4.2V.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and wait at least 20 seconds.
5. Select Service $07 with GST.
If 1st trip DTC is detected, go to
.
Diagnosis Procedure
INFOID:0000000009886735
1.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
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 CONNECTOR
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.
PBIB1110E
BBIA0354E
1
: Drain filter
3
: EVAP canister
4
: EVAP canister vent control value
Water should not exist.
ALBIA0401ZZ
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-323
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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3.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between EVAP control system pressure sensor
terminal 3 and ground with CONSULT or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors C1, E41
• Harness connectors E5, F14
• Harness for open or short between EVAP control system pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between EVAP control system pressure sensor terminal 1 and ECM terminal
67.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors C1, E41
• Harness connectors E5, F14
• Harness for open or short between EVAP control system pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Check harness continuity between ECM terminal 32 and EVAP control system pressure sensor terminal
2.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Voltage: Approximately 5V
PBIB0138E
Continuity should exist.
Continuity should exist.
EC-324
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
Check the following.
• Harness connectors C1, E41
• Harness connectors E5, F14
• Harness for open or short between EVAP control system pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK RUBBER TUBE
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging, vent or kinked.
OK or NG
OK
>> GO TO 10.
NG
>> Clean the rubber tube using an air blower, repair or replace rubber tube.
10.
CHECK EVAP CANISTER VENT CONTROL VALVE
EC-306, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace EVAP canister vent control valve.
11.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-325, "Component Inspection"
OK or NG
OK
>> GO TO 12.
NG
>> Replace EVAP control system pressure sensor.
12.
CHECK DRAIN FILTER
EC-325, "Component Inspection"
OK or NG
OK
>> GO TO 13.
NG
>> Replace drain filter.
13.
CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
2. Check if water will drain from the EVAP canister.
Yes or No
Yes
>> GO TO 14.
No
>> GO TO 16.
14.
CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.5 kg (5.5 lb).
OK or NG
OK
>> GO TO 16.
NG
>> GO TO 15.
15.
DETECT MALFUNCTIONING PART
Check the following.
• EVAP canister for damage
BBIA0351E
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