Mazda 121 - Page 193

TROUBLESHOOTING GUIDE F
STEP utsPEcTtoN ACTION
5
Are ECU lerminal
voltages OK?
(Especially
18,
2M, 20, and 2Q)
Nole
When ch€cking voltagss, tap, moye,
and
wlgglo harmss and connector to recreate
Go lo neil step
6 Arc
spark
plugs
OK?
WEAF AND
CAFBON BUILDUP
{0_03$-0.043
EUBNS
OETEFIIOFATION
7 ls engine compression correc?
F
page
E-10
Englne
compression
(Minimum):
1,030
kPa
(10.5
kg/cm',
1as
psl)-3oo
rpm
Try known
good
ECU and check il
NO
Check
engine c7
page
B-lO
F-37