Infiniti EX35. Manual — part 639
EC-298
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
7.
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.
Start engine and wait at least 20 seconds.
6.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000003133450
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 CONNECTOR
1.
Disconnect EVAP control system pressure sensor harness connector.
2.
Check sensor harness connector for water.
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-I
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.
3.
Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector.
ECM
Connector
+
–
Terminal
Terminal
M107
106
(Fuel tank temperature sensor signal)
128
Water should not exist.
EVAP control system
pressure sensor
Ground
Voltage (V)
Connector
Terminal
B252
3
Ground
Approx. 5
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-299
< COMPONENT DIAGNOSIS >
[VQ35HR]
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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.
• Crankshaft position sensor (POS) (Refer to
EC-255, "Component Inspection"
• Camshaft position sensor (PHASE) (bank 2) (Refer to
EC-260, "Component Inspection"
• Exhaust valve timing control position sensor (bank 2) (Refer to
EC-348, "Component Inspection"
.)
• Battery current sensor (Refer to
EC-379, "Component Inspection"
.)
• Refrigerant pressure sensor (Refer to
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace malfunctioning component.
8.
CHECK APP SENSOR
EC-423, "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-423, "Special Repair Requirement"
.
>> INSPECTION END
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
CKP sensor (POS)
F2
1
F102
64
CMP sensor (PHASE) (bank 2)
F18
1
EVT control position sensor (bank 2)
F19
1
Battery current sensor
E21
1
M107
103
APP sensor
E112
6
107
EVAP control system pressure sensor
B252
3
111
Refrigerant pressure sensor
E77
3
EC-300
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
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 or 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 or short to ground or short to power in harness or connectors.
14.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-301, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> Replace EVAP control system pressure sensor.
15.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
>> INSPECTION END
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-301
< COMPONENT DIAGNOSIS >
[VQ35HR]
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Component Inspection
INFOID:0000000003133451
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.
• Do not 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
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