Infiniti G35 (V35) Sedan. Manual — part 537
EC-294
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0448 EVAP CANISTER VENT CONTROL VALVE
Check the following.
• EVAP canister for damage
• EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
>> Repair hose or replace EVAP canister.
6.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1.
Disconnect EVAP control system pressure sensor harness connector.
2.
Check connectors for water.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace EVAP control system pressure sensor.
7.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-298, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace EVAP control system pressure sensor.
8.
CHECK INTERMITTENT INCIDENT
GI-39, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000000956674
1.
CHECK EVAP CANISTER VENT CONTROL VALVE-I
1.
Turn ignition switch OFF.
2.
Remove EVAP canister vent control valve from EVAP canister.
3.
Check portion (A) of EVAP canister vent control valve for being
rusted.
Is it rusted?
YES
>> Replace EVAP canister vent control valve
NO
>> GO TO 2.
2.
CHECK EVAP CANISTER VENT CONTROL VALVE-II
With CONSULT-III
1.
Reconnect harness connectors disconnected.
2.
Turn ignition switch ON.
3.
Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
Water should not exist.
JMBIA0168ZZ
P0448 EVAP CANISTER VENT CONTROL VALVE
EC-295
< COMPONENT DIAGNOSIS >
[VQ35HR]
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4.
Check air passage continuity and operation delay time.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Without CONSULT-III
1.
Disconnect EVAP canister vent control valve harness connector.
2.
Check air passage continuity and operation delay time under the
following conditions.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace EVAP canister vent control valve
3.
CHECK EVAP CANISTER VENT CONTROL VALVE-III
With CONSULT-III
1.
Clean the air passage [portion (A) to (B)] of EVAP canister vent control valve using an air blower.
2.
Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
3.
Check air passage continuity and operation delay time.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Without CONSULT-III
1.
Clean the air passage [portion (A) to (B)] of EVAP canister vent
control valve using an air blower.
2.
Check air passage continuity and operation delay time under the
following conditions.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace EVAP canister vent control valve
Condition VENT CONTROL/V
Air passage continuity between (A) and (B)
ON
Not existed
OFF
Existed
Condition
Air passage continuity between (A) and (B)
12V direct current supply between
terminals 1 and 2
Not existed
OFF
Existed
JMBIA0169ZZ
Condition VENT CONTROL/V
Air passage continuity between (A) and (B)
ON
Not existed
OFF
Existed
Condition
Air passage continuity between (A) and (B)
12V direct current supply between
terminals 1 and 2
Not existed
OFF
Existed
JMBIA0169ZZ
EC-296
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Description
INFOID:0000000000956675
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:0000000000956676
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
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.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
PBIB3370E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0451
EVAP control system
pressure sensor perfor-
mance
ECM detects a sloshing signal from the EVAP
control system pressure sensor
• Harness or connectors
(EVAP control system pressure sensor
circuit is shorted.)
[CKP sensor (POS) circuit is shorted.]
[CMP sensor (PHASE) (bank 2) circuit is
shorted.]
[EVT control position sensor (bank 2) cir-
cuit is shorted.]
(Battery current sensor circuit is shorted.)
(APP sensor 2 circuit is shorted.)
(Refrigerant pressure sensor circuit is
shorted.)
• EVAP control system pressure sensor
• Crankshaft position sensor (POS)
• Camshaft position sensor (PHASE)
(bank 2)
• Exhaust valve timing control position sen-
sor (bank 2)
• Battery current sensor
• Accelerator pedal position sensor
• Refrigerant pressure sensor
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-297
< COMPONENT DIAGNOSIS >
[VQ35HR]
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Diagnosis Procedure
INFOID:0000000000956677
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 FOR WATER
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
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 8.
NO
>> GO TO 4.
4.
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 5.
NO
>> Repair short to ground or short to power in harness or connectors.
5.
CHECK COMPONENTS
Check the following.
• Crankshaft position sensor (POS) (Refer to
EC-257, "Component Inspection"
• Camshaft position sensor (PHASE) (bank 2) (Refer to
EC-262, "Component Inspection"
• Exhaust valve timing control position sensor (bank 2) (Refer to
EC-350, "Component Inspection"
.)
• Battery current sensor (Refer to
EC-381, "Component Inspection"
.)
• Refrigerant pressure sensor (Refer to
HAC-92, "Component Inspection"
.)
Water should not exist.
EVAP control system
pressure sensor
Ground
Voltage
Connector
Terminal
B252
3
Ground
Approx. 5V
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
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