Infiniti I30 (A33). Manual — part 316
Diagnostic Procedure
NHEC0352
1
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
©
GO TO 2.
No
©
GO TO 3.
2
CHECK VACUUM CUT VALVE BYPASS VALVE CIRCUIT
With CONSULT-II
1. Turn ignition switch “OFF” and then “ON”.
2. Select “VC/V BYPASS/V” in “ACTIVE TEST” mode with CONSULT-II.
3. Touch “ON/OFF” on CONSULT-II screen.
SEF014Z
4. Make sure that clicking sound is heard from the vacuum cut valve bypass valve.
OK or NG
OK
©
GO TO 7.
NG
©
GO TO 3.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1490 VACUUM CUT VALVE BYPASS VALVE (CIRCUIT)
Diagnostic Procedure
EC-579
3
CHECK VACUUM CUT VALVE BYPASS VALUE POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect vacuum cut valve bypass valve harness connector.
SEF278X
3. Turn ignition switch “ON”.
4. Check voltage between vacuum cut valve bypass valve terminal 1 and ground with CONSULT-II or tester.
SEF356X
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 vacuum cut valve bypass valve and fuse
©
Repair harness or connectors.
5
CHECK VACUUM CUT VALVE BYPASS 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 39 and vacuum cut valve bypass 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.
DTC P1490 VACUUM CUT VALVE BYPASS VALVE (CIRCUIT)
Diagnostic Procedure (Cont’d)
EC-580
6
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors B3, M6
I
Harness connectors M81, F49
I
Harness for open or short between vacuum cut valve bypass valve and ECM
©
Repair open circuit or short to ground or short to power in harness or connectors.
7
CHECK VACUUM CUT VALVE BYPASS VALVE
With CONSULT-II
1. Reconnect harness disconnected connectors.
2. Turn ignition switch ON.
3. Perform “VC/V BYPASS/V” in “ACTIVE TEST” mode.
4. Check air passage continuity and operation delay time under the following conditions.
SEF016Z
Without CONSULT-II
Check air passage continuity and operation delay time under the following conditions.
SEF358X
OK or NG
OK
©
GO TO 8.
NG
©
Replace vacuum cut valve bypass valve.
8
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-144.
©
INSPECTION END
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1490 VACUUM CUT VALVE BYPASS VALVE (CIRCUIT)
Diagnostic Procedure (Cont’d)
EC-581
SEF278X
Description
NHEC0353
COMPONENT DESCRIPTION
NHEC0353S01
The vacuum cut valve and vacuum cut valve bypass valve are
installed in parallel on the EVAP purge line between the fuel tank
and the EVAP canister.
The vacuum cut valve prevents the intake manifold vacuum from
being applied to the fuel tank.
The vacuum cut valve bypass valve is a solenoid type valve and
generally remains closed. It opens only for on board diagnosis.
The vacuum cut valve bypass valve responds to signals from the
ECM. When the ECM sends an ON (ground) signal, the valve is
opened. The vacuum cut valve is then bypassed to apply intake
manifold vacuum to the fuel tank.
EVAPORATIVE EMISSION SYSTEM DIAGRAM
NHEC0353S02
SEF323U
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0354
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
VC/V BYPASS/V
I
Ignition switch: ON
OFF
On Board Diagnosis Logic
NHEC0356
Malfunction is detected when vacuum cut valve bypass valve does
not operate properly.
DTC P1491 VACUUM CUT VALVE BYPASS VALVE
Description
EC-582
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст