Infiniti FX35, FX50 (S51). Manual — part 845
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-921
< DTC/CIRCUIT DIAGNOSIS >
[VK50VE]
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>> INSPECTION END
10.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND
SHORT
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 short to power.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> GO TO 11.
11.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B201, M117
• Harness connectors M116, F103
• Harness for open or short between EVAP control system pressure sensor and ECM
>> Repair open circuit, short to ground or short to power in harness or connectors.
12.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1.
Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> GO TO 13.
13.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B201, M117
• Harness connectors M116, F103
• Harness for open or short between EVAP control system pressure sensor and ECM
>> Repair open circuit, short to ground or short to power in harness or connectors.
14.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-922, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> Replace EVAP control system pressure sensor.
EVAP control system
pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
B252
1
F111
70
Existed
EVAP control system
pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
B252
2
F111
80
Existed
EC-922
< DTC/CIRCUIT DIAGNOSIS >
[VK50VE]
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
15.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000005237391
1.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
1.
Turn ignition switch OFF.
2.
Remove EVAP control system pressure sensor with its harness connector.
Always replace O-ring with a new one.
3.
Install a vacuum pump to EVAP control system pressure sensor.
4.
Turn ignition switch ON and check output voltage between ECM harness connector terminals under the
following conditions.
CAUTION:
• Always calibrate the vacuum pump gauge when using it.
• Never apply below -93.3 kPa (-0.952 kg/cm
2
, -13.53 psi) or pressure over 101.3 kPa (1.033 kg/cm
2
,
14.69 psi).
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace EVAP control system pressure sensor.
ECM
Condition
[Applied vacuum kPa (kg/cm
2
, psi)]
Voltage (V)
Connector
+
–
Terminal
Terminal
F111
80
70
Not applied
1.8 - 4.8
-26.7 (-0.272, -3.87)
2.1 to 2.5 lower than above value
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-923
< DTC/CIRCUIT DIAGNOSIS >
[VK50VE]
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P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
Description
INFOID:0000000005237392
The EVAP control system pressure sensor detects pressure in the
purge line. The sensor output voltage to the ECM increases as pres-
sure increases.
DTC Logic
INFOID:0000000005237393
DTC DETECTION LOGIC
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.
TESTING CONDITION:
Always perform test at a temperature of 5
°
C (41
°
F) or more.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
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.
PBIB3370E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0453
EVAP control system
pressure sensor high in-
put
An excessively high voltage from
the sensor is sent to ECM.
• Harness or connectors
(EVAP control system pressure sensor circuit is open
or shorted.)
(APP sensor 2 circuit is shorted.)
(Battery current sensor circuit is shorted.)
[Camshaft position sensor (bank 1) circuit is shorted.]
[Crankshaft position sensor circuit is shorted.]
[Exhaust valve timing control position sensor (bank 1)
circuit is shorted.]
(Manifold absolute pressure sensor circuit is shorted.)
• EVAP control system pressure sensor
• Accelerator pedal position sensor
• Battery current sensor
• Camshaft position sensor (bank 1)
• Crankshaft position sensor
• Exhaust valve timing control position sensor (bank 1)
• Manifold absolute pressure sensor
• EVAP canister vent control valve
• EVAP canister
• Rubber hose from EVAP canister vent control valve to
vehicle frame
EC-924
< DTC/CIRCUIT DIAGNOSIS >
[VK50VE]
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
4.
Turn ignition switch OFF and wait at least 10 seconds.
5.
Turn ignition switch ON.
6.
Select “DATA MONITOR” mode with CONSULT-III.
7.
Check that “FUEL T/TMP SE” is more than 0
°
C (32
°
F).
8.
Start engine and wait at least 20 seconds.
9.
Check 1st trip DTC.
With GST
1.
Start engine and warm it up to normal operating temperature.
2.
Set voltmeter probes to ECM harness connector terminals under the following conditions.
3.
Check that the voltage is less than 4.2 V.
4.
Turn ignition switch OFF and wait at least 10 seconds.
5.
Turn ignition switch ON.
6.
Turn ignition switch OFF and wait at least 10 seconds.
7.
Start engine and wait at least 20 seconds.
8.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005237394
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection M95. Refer to Ground Inspection in
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1.
Disconnect EVAP control system pressure sensor harness connector.
2.
Check that water is not inside connectors.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness connector.
3.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
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 10.
NO
>> GO TO 4.
4.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
ECM
Ground
Connector
+
–
Terminal
Terminal
M160
120
(Fuel tank temperature sensor signal)
128
EVAP control system pressure sensor
Ground
Voltage (V)
Connector
Terminal
B252
3
Ground
Approx. 5
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