Mazda 121 - Page 202

F
TROUBLESHOOTING
GUIDE
SIEF
INSPECTION
ACTION
a Conn€ct
Syslem
Selector
to diagnosis connector
and sel
Tesl Swltch to
"SELF
TEST"
ls
Lgnll|on mrng corred at
rdle
atler
wam up?
.j
pagc
F-42
lgnitlon
liming: BTDC
16
+
r'
INDICATOF
Does ignition
timing advance
\,rten
4
lf advances,
go
lo na)d step
+
tf not advance,
replace ECU
rr
p.g.
F-112
9
ls luel line
pressure
correct al dle?
E7
page
F44
zgs-zzi
xpa
(z.t-z.a
*g,fcm', 34-iu)
p6i)
Does
fuel line
pressule
decrease
when accaleating
quickly?
+
tf decreases,
check
lor tuel
pump
maximum
pressure !?
PagG
F-91
li
OK,
check
fuel line and lilter
for
cbggrng
4
li no
decrease,
go
to
n€xt slep
Check
tueL
line
prsssurc
by
pinchang
+
ll iuel
line
prcssure
qulckly
in-
creases,
ch€ck
pressufa
regulalor
+
lf luel
line
pressure
Sradually
ln
creases, check
for clogging
be
lween
iuel
pump
and
pressure
rcgu|alol
li not
clogged, check
luel
pump
maximum
pressure
c7
P.go
F-91
High
prcas0ae
Check
it tuel ret'rrn
line is clogged
4
ll OK,
repiace
pressure
fegulalor
e
Pag.
F-94
+
ll not OK,
replace
10 Check
lor
poor
connection of
lollowing
parts
.
lgnitef
.
Distribuor
.
Hish
tension lead
.
Crrcuit opening
relay
.
ECU
tl Try known
good
EcU and
ch€ck il
F-46