Infiniti F50. Manual — part 475
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-541
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EC
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
EBS00MKR
1.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIR-
CUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect EVAP canister purge volume control solenoid valve
harness connector.
3.
Turn ignition switch “ON”.
4.
Check voltage between EVAP canister purge volume control
solenoid valve terminal 1 and ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
54
L/Y
EVAP canister purge volume
control solenoid valve
[Engine is running]
●
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Engine speed is about 2,000 rpm (More
than 100 seconds after starting engine).
BATTERY VOLTAGE
(11 - 14V)
PBIB0050E
PBIB0051E
PBIB0025E
Voltage: Battery voltage
PBIB0148E
EC-542
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
2.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E32, F32
●
Fuse, fusible link and relay block (J/B) connector E3
●
10A fuse
●
Harness for open or short between EVAP canister purge volume control solenoid valve and fuse
>> Repair harness or connectors.
3.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIR-
CUIT FOR OPEN AND SHORT
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminal 54 and EVAP canister purge volume control solenoid
valve terminal 2. Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1.
Disconnect EVAP control system pressure sensor harness connector.
2.
Check connectors for water.
OK or NG
OK
>> GO TO 5.
NG
>> Replace EVAP control system pressure sensor.
5.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to
EC-357, "Component Inspection"
OK or NG
OK (With CONSULT-II)>>GO TO 6.
OK (Without CONSULT-II)>>GO TO 7.
NG
>> Replace EVAP control system pressure sensor.
Continuity should exist.
Water should not exist.
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-543
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EC
6.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-II
1.
Turn ignition switch “OFF”.
2.
Reconnect harness connectors disconnected.
3.
Start engine.
4.
Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. Check that engine speed varies according to the
valve opening.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to
EC-544, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace EVAP canister purge volume control solenoid valve.
8.
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 9.
NG
>> Clean the rubber tube using an air blower.
9.
CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to
EC-551, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace EVAP canister vent control valve.
10.
CHECK IF EVAP CANISTER SATURATED WITH WATER
1.
Remove EVAP canister with EVAP canister vent control valve attached.
2.
Check if water will drain from the EVAP canister.
Yes or No
Yes
>> GO TO 11.
No
>> GO TO 14.
PBIB0147E
SEF596U
EC-544
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
11.
CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve attached.
The weight should be less than 2.1 kg (4.6 lb).
OK or NG
OK
>> GO TO 13.
NG
>> GO TO 12.
12.
DETECT MALFUNCTIONING PART
Check the following.
●
EVAP canister for damage
●
EVAP hose between EVAP canister and water separator for clogging or poor connection
>> Repair hose or replace EVAP canister.
13.
CHECK WATER SEPARATOR
Refer to
EC-537, "Component Inspection"
OK or NG
OK
>> GO TO 14.
NG
>> Clean or replace water separator.
14.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS00MKS
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-II
Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.
Without CONSULT-II
Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.
Condition
(PURG VOL CONT/V value)
Air passage continuity
between A and B
100.0%
Yes
0.0%
No
PBIB0149E
Condition
Air passage continuity
between A and B
12V direct current supply between
terminals 1 and 2
Yes
No supply
No
PBIB0150E
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