Honda CR-V 1997 Service Manual page 424

Emission Control System
Evaporative Emission (EVAP) Controls (cont'd)
I
P1457
I
(cont'd)
EVAP control canister vent shut
vatv. test.
' "
VACUUM
PUMP/GAUGE, 0 - 30 In.Hg
A973X-041-
XXXXX
(The continuation of DTe P1457
troubleshooting.)
Check the EVAP control alnister
vent shut valve:
1. Disconnect the vacuum hose
from the EVAP three way valve,
and connect a vacuum pump
to the hose.
2. Connect the ECM/PCM con nec-
tor terminal A4 to the body
ground with a jumper wire.
3. Turn the ignition switch ON
(II).
4. Apply vacuum to the hose.
Does the valve hold vacuum?
NO
Check for an open In the wire
IVSVlinel:
1. Turn the ignition switch OFF.
2. Disconnect the EVAP control
canister vent shut valve 2P
con nector.
3. Check for continuity between
the EVAP control canister vent
shut valve 2P connector termi·
nal No. 1 and body ground.
Is there continuity?
YES
Check for an open in the wire
(1G1Iine):
1. Turn the ignition switch ON
(II).
2. Measure voltage between the
EVAP control canister vent shut
valve 2P con nect or terminal
No.1 and body ground.
Is there battery voltage?
NO
Repair open in the wire between
the EVAP control canister vent
shut velv& end No. 16 ALTERNA-
TOR SP SENSOR 17.5 Alluse.
11-222
(
EVAP ,
!!,::E\i
I
VALVE ! !
J t]
YES
NO
YES
EVAP control canister vent shut
valve is OK. Do the canister sys-
tem teak test (s •• page
11-2231.
Repair open in the wire between
the EVAP control canister vent
shut valve and the ECM/PCM
IA41.
Replace the EVAP control canis-
ter vent shut valve and O-ring.
ECM/PCM CONNECTOR A 132PI
r-_ _ _
..,VSV
ILT GRN/WHTI
3 4 5 6 • 10
I.
16 17 18 19 20 21
23
26 27 28 29 30 32
JUMPER
WIRE
EVAP
CONTROL
CANISTER
Wire side of female terminals
EVAP CONTROL
CANISTER VENT SHUT
VALVE 2P CONNECTOR 1&3611
VSV
r
2
n
ILT GRN/WHTI
~
Wire side of female terminals
EVAP
CONTROL
CANISTER
VENT
SHUT
VALVE
O-RING
.,.,-l---Replace.
'
2
IGI
If.
IBLK/WHTI
1
24