Subaru 2009 IMPREZA Service Manual page 155

FUEL INJECTION (FUEL SYSTEMS)
3) Install the under cover.
4) Lower the vehicle.
5) Connect the rear oxygen sensor connector and
fasten the harness with clips.
(B)
(C)
(A) Front oxygen (A/F) sensor connector
(B) Rear oxygen sensor connector
(C) Clip
6) Connect the ground cable to battery.
C: INSPECTION
Measure the resistance between rear oxygen sen-
sor terminal.
2 1
4 3
Terminal No.
1 and 2
Rear Oxygen Sensor
(A)
EX-02350
IN-00203
FU-04073
Standard
+0.8
5.6
–0.6
(when 20°C (68°F))
FU(H4SO)-44