Infiniti I35 (A33). Manual — part 258
3
CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect EVAP canister vent control valve harness connector.
SEF267X
3. Turn ignition switch ON.
4. Check voltage between EVAP canister vent control valve terminal 1 and ground with CONSULT-II or tester.
SEC061D
Voltage: Battery voltage
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 4.
4
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M5, B1
I
Fuse block (J/B) connector M19
I
15A fuse
I
Harness for open or short between EVAP canister vent control valve and fuse
©
Repair harness or connectors.
5
CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 105 and EVAP canister vent control valve terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 7.
NG
©
GO TO 6.
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IDX
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure (Cont’d)
EC-373
6
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors B3, M6
I
Harness connectors M81, F49
I
Harness for open or short between EVAP canister vent control valve and ECM
©
Repair open circuit or short to ground or short to power in harness or connectors.
7
CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.
OK or NG
OK
©
GO TO 8.
NG
©
Clean the rubber tube using an air blower.
8
CHECK EVAP CANISTER VENT CONTROL VALVE-I
1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for being rusted.
SEF376Z
OK or NG
OK
©
GO TO 9.
NG
©
Replace EVAP canister vent control valve.
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure (Cont’d)
EC-374
9
CHECK EVAP CANISTER VENT CONTROL VALVE-II
With CONSULT-II
1. Reconnect harness connectors disconnected.
2. Turn ignition switch ON.
3. Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
4. Check air passage continuity and operation delay time.
SEC158D
Without CONSULT-II
Check air passage continuity and operation delay time under the following conditions.
SEF378Z
Make sure new O-ring is installed properly.
OK or NG
OK
©
GO TO 11.
NG
©
GO TO 10.
10
CHECK EVAP CANISTER VENT CONTROL VALVE-III
1. Clean the air passage (Portion A to B) of EVAP canister vent control valve using an air blower.
2. Perform Test No. 9 again.
OK or NG
OK
©
GO TO 11.
NG
©
Replace EVAP canister vent control valve.
11
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-152.
©
INSPECTION END
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure (Cont’d)
EC-375
SEF053V
SEF954S
Component Description
NHEC0779
The EVAP control system pressure sensor detects pressure in the
purge line. The sensor output voltage to the ECM increases as
pressure increases. The EVAP control system pressure sensor is
not used to control the engine system. It is used only for on board
diagnosis.
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0780
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
EVAP SYS PRES
I
Ignition switch: ON
Approx. 3.4V
On Board Diagnosis Logic
NHEC0782
NOTE:
If DTC P0452 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229. Refer to
EC-539.
DTC No.
Trouble diagnosis
name
DTC Detecting Condition
Possible Cause
P0452
0452
EVAP control system
pressure sensor low
input
An excessively low voltage from the sensor is sent
to ECM.
I
Harness or connectors
(The sensor circuit is open or
shorted.)
I
EVAP control system pressure sensor
DTC Confirmation Procedure
NHEC0784
NOTE:
If DTC Confirmation Procedure has been previously conducted,
always turn ignition switch OFF and wait at least 10 seconds before
conducting the next test.
TESTING CONDITION:
Always perform test at a temperature of 5°C (41°F) or more.
DTC P0452 EVAP SYSTEM PRESSURE SENSOR
Component Description
EC-376
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