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Possible Cause
NHEC0592
I Harness or connectors
(The vacuum cut valve bypass valve circuit is open or shorted.)
I Vacuum cut valve bypass valve
DTC Confirmation Procedure
NHEC0350
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:
Before performing the following procedure, confirm that bat-
tery voltage is more than 11V at idle speed.
SEF058Y
WITH CONSULT-II
NHEC0350S01
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine and wait at least 5 seconds.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-579.
WITH GST
NHEC0350S02
Follow the procedure “WITH CONSULT-II” above.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1490 VACUUM CUT VALVE BYPASS VALVE (CIRCUIT)
Possible Cause
EC-577
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