Mazda 121 - Page 176

F
TROUBLESHOOTING
GUIDE
INSPECTION
ACTION
Are ECU
teminal
voltages
OK?
lEsDeciallv
1C,
1K,20
and 20)
c7
Page
F-112
Check
ior cause
-
Page
F-114
F-l16
5
ls lhere air
leakage
ol intake
ai svstem
com-
6 Does engine
starts
when
waler themos€nsor
is
Chbck
water thermosensor
!7
page
F-121
7
A'e spark
plugs
OK?
F
Page
G-19
WEAF AND CAFBON
BUILDUP
(0.039-0.o4i,
BUBNS
AND
DETERIOFAIION
No
Clean, or rep
ace
tr-
Page
G-19
a ls enoine
comorcssion
correct?
-
s
Page
B-10
Enoine comDression:
More
than 1,030
kPa
(t-o.s
rglcr;'.
149
psi)-300 rPm
Try known
good
EcU and check
af
Check
engine
condition
.?
Page
B-10
.wofn
pston,
pislon
rings or cylinder
.Defective
cylinder
head
gasket
.
Distorled cylindff
head
.lmproper
valve
s€atng
.
Valve slickins
in
Suide
F-20