Honda CR-V 1997 Service Manual page 423

EVAP bypass solenoid valve test.
(The continuation of DTC P1457
troubleshooting .)
Check the EV AP bypass solenoid
valve:
1. Disconnect the vacuum hose
from the EVA P two way valve,
and connect a vacuum pump
to the
hose.
2.
Turn the ignition switch ON
(II).
3. Apply vacuum to the hose.
"-
Does the valve hold vacuum?
/'
NO
Check the
EVAP
bypass solenoid
valva:
1. Turn the ignition switch OFF.
2. Disconnect the EVAP bypass
solenoid valve 2P connector.
3. Check for continuity between
the EVAP byp as s so len oid
va lve 2P connector terminal
NO. 2 and body ground.
"-
Is there continuity?
/'
YES
Check for
I
short in the wire
(2WBS line):
1.
Disconnect ECM/PCM connec-
tor
A (32 P).
2. Check for continuity between
the EVAP bypass solenoid
valve 2P connector terminal
No.2 and body ground .
Is there continuity?
/'
NO
Substitute
8
known-good ECMI
PCM and recheck .
If symptoml
indication goes away, replace
the original ECM/PCM.
EVAP bypass solenoid valvel
YES
EVAP two way valva is OK. Do
the EVAP control canister vent
shut valve test (see page 11·222) .
NO
Replace the EVAP bypass solenoid
vatv. and O-rings.
YES
Repair short in the wire between
the ECM!PCM (A3) and the EVAP
bypass solenoid valve.
EVAP
BYPASS
SOlENOID
VALVE
VACUUM
FUEL TANK
PRESSURE SENSOR
EVAPTWOWAY
VALVE
PUMP!
tf
GAUGE,
0-30 in.Hg
A973X-
041-
XXXXX
EVAP BYPASS SOLENOID
VALVE 2P CONNECTOR (<:647)
2WBS
(BWI
Wire side of
female
terminals
2WBS
(BLUI
(conl'd)
11-221