Mazda 121 Workshop Manual 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