Subaru 1600 Service Manual page 192

NOTE:
Be sure to insert
test
bars from the
harness side of the connector.
2) A stethoscope or a vinyl tube
A stethoscope or a vinyl tube is used
to check if there is operating sound
from duty solenoid valves.
A10-129
Fig. 5·55
3) A dry cell
A dry cell, connecting plus (+) terminal
of it to O
2
sensor wiring and minus (-)
one to earth instead of O
2
sensor, is
used to check O
2
sensor and its wiring
for defect.
EMISSION CONTROL SYSTEM
0,
sensor cord
A10·203
Fig. 5·56
NOTE:
When replacing oxygen
(0
2 )
sensor,
remove
or
tighten it by using a special
tool (Socket; 499990100).
A5-680
Fig. 5·57 Rep/acing O
2
sensor
• NOTE FOR TROUBLESHOOTING
CHART:
1. Check the connector while itia
connected unless specified oUter·
wise.
2. Be sure to check again from the
beginning in order to prevent
secondary trouble caused by repair
work.
3. When checking with the vacuum .
hose disconnected from the
vaclltmEl
switch at
EtG
on, be
the hose.