Infiniti FX35, FX50 (S51). Manual — part 694
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-317
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
C
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EC
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4.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-II
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.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors B201, M117
• Harness for open between ECM and EVAP control system pressure sensor
>> Repair open circuit.
6.
CHECK SENSOR POWER SUPPLY CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair short to ground or short to power in harness or connectors.
7.
CHECK COMPONENTS
Check the following.
• CKP sensor (Refer to
EC-271, "Component Inspection"
• CMP sensor (bank 2) (Refer to
EC-277, "Component Inspection"
.)
• EVT control position sensor (bank 2) (Refer to
EC-369, "Component Inspection"
• Battery current sensor (Refer to
EC-400, "Component Inspection"
.)
• Refrigerant pressure sensor (Refer to
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace malfunctioning component.
8.
CHECK APP SENSOR
EVAP control system
pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
B252
3
M107
107
Existed
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
F101
46
Crankshaft position (CKP) sensor
F2
1
F102
64
Camshaft position (CMP) sensor (bank
2)
F18
1
Exhaust valve timing (EVT) control posi-
tion sensor (bank 2)
F19
1
Battery current sensor
E21
1
M107
103
Accelerator pedal position (APP) sensor
E112
(Without ICC)
6
E116
(With ICC)
3
107
EVAP control system pressure sensor
B252
3
111
Refrigerant pressure sensor
E77
3
EC-318
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-444, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> GO TO 9.
9.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1.
Replace accelerator pedal assembly
2.
Go to
EC-445, "Special Repair Requirement"
.
>> 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 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 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.
EVAP control system
pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
B252
1
M107
112
Existed
EVAP control system
pressure sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
B252
2
M107
102
Existed
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-319
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
14.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-319, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> Replace EVAP control system pressure sensor.
15.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000005236905
1.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
1.
Turn ignition switch OFF.
2.
Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
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
M107
102
112
Not applied
1.8 - 4.8
-26.7 (-0.272, -3.87)
2.1 to 2.5 lower than above value
EC-320
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
Description
INFOID:0000000005236906
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:0000000005236907
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
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.)
[Crankshaft position (CKP) sensor circuit
is shorted.]
[Camshaft position (CMP) sensor (bank
2) circuit is shorted.]
[Exhaust valve timing (EVT) control posi-
tion sensor (bank 2) circuit is shorted.]
(Battery current sensor circuit is shorted.)
[Accelerator pedal position (APP) sensor
2 circuit is shorted.]
(Refrigerant pressure sensor circuit is
shorted.)
• EVAP control system pressure sensor
• CKP sensor
• CMP sensor (bank 2)
• EVT control position sensor (bank 2)
• Battery current sensor
• APP sensor
• Refrigerant pressure sensor
• EVAP canister vent control valve
• EVAP canister
• Rubber hose from EVAP canister vent
control valve to vehicle frame
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