Infiniti QX4 (R50). Manual — part 280
Wiring Diagram
NBEC0351
MEC972C
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1490 VACUUM CUT VALVE BYPASS VALVE (CIRCUIT)
Wiring Diagram
EC-587
Diagnostic Procedure
NBEC0352
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.
DTC P1490 VACUUM CUT VALVE BYPASS VALVE (CIRCUIT)
Diagnostic Procedure
EC-588
3
CHECK VACUUM CUT VALVE BYPASS VALUE POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect vacuum cut valve bypass valve harness connector.
SEF485T
3. Turn ignition switch “ON”.
4. Check voltage between vacuum cut valve bypass valve terminal 2 and ground with CONSULT-II or tester.
SEF015Z
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 4.
4
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M2, B1
I
Fuse block (J/B) connector M10
I
Harness connectors B43, B101 and B151, B152
I
10A 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 1. 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.
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1490 VACUUM CUT VALVE BYPASS VALVE (CIRCUIT)
Diagnostic Procedure (Cont’d)
EC-589
6
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors B152, B151 and B101, B43
I
Harness connectors B1, M2 and M94, F27
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-140.
©
INSPECTION END
DTC P1490 VACUUM CUT VALVE BYPASS VALVE (CIRCUIT)
Diagnostic Procedure (Cont’d)
EC-590
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст