Mazda 121 Workshop Manual page 227

SELF-DIAGNOSIS FUNCTION
F
CODE t{o.
08 (ATRFLOW SE SOR)
STEP
IISPECTTON
acTtot{
ls ihere poof connection in airilow sensor circuiP
Repair or teplace wi ng
2
ls ECU lerminal 20 vollage OK?
e page F-118
lgnition swilch ON
ldle
ls same Code presenl atter performing
alter'repalf procedure?
+
lf YES, replace ECU
+
lf NO, r€check airliow sensor and
ECU ior poor conneclion
e p.g€ F-79
No
Go to next step
3
ls lhere battery vollage at airtlow sensor connec'
tor teminal C with airilow s€nsor connector dis.
Check tor short or open circuil in wir-
ng trom aiflow sensor conneclor ter-
mnal C lo main relay.
+
lJ OK, check main realy
+
ll not OK, repair or rcplace
ls lhe.e conlinuiiy belween airilow sensor lerrni-
na B and sround?
R€pan or rcplace wiing
5 ls resislance between arrflow sensor teminals A
and B OK?
E7 page F-121
Resistance: 4 + 1 m eo"C t68.Fl)
ls there conllnuty between ECU terminal 20 and aidlow
+
lf OK, replac€ aidlow sensor
+
lf not OK, repair or replace
N o Aeplace airllow sensor
Circult Diagram
FFOM IGNITION
swtTcH
t r r l
r l l
r l r l
1l G/w ll
clv
,i
AIFFLOW SENSOR
F-71