Mazda 121 - Page 196

F
TROUBLESHOOTING
GUIDE
Connecl
System
Seteclor
to diagnosis
conn€cior
and
set Test
Switch to
"SELF
TEST
ls roftton trmrno
cotted at
Ldle
atter
warm up?
7
P.ge
F-62
BTDC 16
+
1.
tNDtcAToB ---l
\,,1S\
\|!/
TEsr sw
Adjust
lgnition
tming
e
Page
Fl2
Are
ECU leminal
vollages
OK?
lEsoeciallv
2[/)
'
e
Pago
F-lla
CtrecX
tor
cause
e
Page
F-119
ls strong
blue spark
visible
at €ach disconnected
high'tension
lead?_
:"''-t'
',-t'.--
_1-(_(d
Check
high-tension
lead
+
ll OK,
check
dislribulor
cap and
e
fi not OK,
replace
high'tension
Check
lor correct engine
conrpression
!?
page
B-10
Compression
(Minimum): 1,030
kPa
(t0.5
kg/dn',
1r9
Psi)-300
rPm
4
lf OK,
go
to
nexi step
+
tJ
not OK, check
for cause
c7
pag€
A-10
Ar€ spark
plugs
OK?
p
17
page G-19
(0.039--o.043
in)
BUFNS
Try known
good ECU and
check il condition
F-40