Mazda 121 - Page 230

F
SELF-DIAGNOSIS
FUNCTION
ffiYGEN
sENsoB
-
tNAcrtvATtot{)
STEP
t]{sPECTlOt{
ACTION
ls there
a
poor
connection
n orygen
sensor
Repair
or replace
wing
2 ls oxygen
sensor odpul
vollage
cotrecr?
F
Page
F-123
Replace
oxygon
sensor
3 ls there
continuity
betlveen oxygen
sensor
and
EclJ termlnal
2N?
ls
ECU terminal
2N
voltage correcl?
F
Page
F-1lE
Check
ior shod
circuit
in wiring
lrom oxvgen
sensor
to
ECU
5 ls
sensitivity of
oxygen sensor
correcp
t7
Page
F-123
aadro Fa|| s oaoe
F-t12
Try known
good
otygen sensor
and
ch;ck
It co;dition
improves
.?
ptge
F-124
Circuit
Diagram
F-7
4