Infiniti Q45. Manual — part 482
DTC P1490 VACUUM CUT VALVE BYPASS VALVE
EC-567
C
D
E
F
G
H
I
J
K
L
M
A
EC
3.
CHECK VACUUM CUT VALVE BYPASS VALVE POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect vacuum cut valve bypass valve harness connector.
3.
Turn ignition switch ON.
4.
Check voltage between vacuum cut valve bypass valve terminal
1 and ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors B401, B251
●
Harness connectors B209, M139
●
Harness connectors M135, F105
●
Harness for open or short between vacuum cut valve bypass valve and ECM relay
>> Repair open circuit or short to ground or short to power in 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 112 and vacuum cut valve bypass 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 7.
NG
>> GO TO 6.
Voltage: Battery voltage
PBIB0026E
PBIB0158E
Continuity should exist.
EC-568
DTC P1490 VACUUM CUT VALVE BYPASS VALVE
6.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors B401, B251
●
Harness connectors B211, M141
●
Harness connectors M135, F105
●
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
Refer to
EC-568, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace vacuum cut valve bypass valve.
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
NBS0023M
VACUUM CUT VALVE BYPASS VALVE
With CONSULT-II
1.
Reconnect all harness connectors disconnected.
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.
Operation takes less than 1 second.
PBIB3138E
Condition
VC/V BYPASS/V
Air passage continuity
between A and B
ON
Yes
OFF
No
PBIB0149E
DTC P1490 VACUUM CUT VALVE BYPASS VALVE
EC-569
C
D
E
F
G
H
I
J
K
L
M
A
EC
With GST
Check air passage continuity and operation delay time under the fol-
lowing conditions.
Operation takes less than 1 second.
Condition
Air passage continuity
between A and B
12V direct current supply between
terminals 1 and 2
Yes
No supply
No
PBIB0160E
EC-570
DTC P1491 VACUUM CUT VALVE BYPASS VALVE
DTC P1491 VACUUM CUT VALVE BYPASS VALVE
PFP:17372
Description
NBS0023N
COMPONENT DESCRIPTION
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
CONSULT-II Reference Value in Data Monitor Mode
NBS0023O
Specification data are reference values.
PBIB0026E
SEF323U
MONITOR ITEM
CONDITION
SPECIFICATION
VC/V BYPASS/V
●
Ignition switch: ON
OFF
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст