Honda CR-V 1997 Service Manual page 418

Emission Control System
Evaporative Emission (EVAP) Controls (cont'dl
I
P1456
I
(cont'd)
EVAP bypass solenoid valve
test.
EVAP
(The !;ontinuation of DTC P1456
FUEL TANK
troubleshooting.'
BYPASS
PRESSURE SENSOR
SOLENOID
EVAPTWO
VALVE
'---0::-
VALVE
¢jl'"~ ~ =-.
2
Check the EVAP bypass solenoid
valve:
1.
Disconnect the vacuum hose
'
---
0
from the EVAP two way valve,
~
'\~ ~."
and connect a vacuum pump
to the hose .
2.
Connect the ECM/ PCM con -
VACUUM
~
nector terminal A3 to the body
PUMP/
ground with a jumper wire.
GAUGE,
rt'
3. Turn the ignition switch ON
(II) .
0- 30 in.Hg
4. Apply vacuum to the hose.
A973X -
041-
XXXXX
NO
EVAP bypass solenoid valve!
"- EVAP two way valve is OK. Do
Does the valve hold vacuum?
/ the EVAP control canister vent
YES
shut valve test (s.e page
1'·211).
Check for an open in the wire
(2WBS
line):
'- Turn the ignition switch OFF .
2.
Disconnect the EVAP bypass
solenoid valve 2P connector.
3. Check for continuity between
the EVAP bypass solenoid
valve 2P connector terminal
No. 2 and body ground .
Repair open in the wire between
"-
NO
Is there continuity?
the EVAP bypass solenoid valve
and ECM/PCM (A31.
YES
Check for an open in the wire
UG1 line):
'-
Turn the ignition switch ON
(II).
2.
Measure voltage between the
EVAP bypass solenoid va lve
2P connector terminal No. ,
and body grou nd .
Is there battery voltage?
"-
YES \
Replace the EV AP bypa5$ soa&noid
/
valva and O-rings.
NO
Repair "pen In the wire between
the EVAP bypass solenoid valva
and No. 15 ALTERNATOR SP
SENSOR
0 .5
AI fuse.
11-216
WAY
ECMIPCM CONNECTOR A (32PI
WBS (BLU)
JUMPER WIRE
10
23 2.
32
Wire side of female term inals
EVAP BYPASS SOLENOID
VALVE 2P CONNECTOR (C6-47)
'
2
2WBS
n
(BLU)
1
Wire side of
female
terminals
1G1
(BLKIWHTI