Mazda 121 Workshop Manual page 228

F
SELF-DIAGNOSIS FUNCTION
CODE NO.I
09 (WATER THERI'OSENSOR}
STEP
tNSPECTTOI{
ACTION
1
ls there a poor conneciion in waler thermosen_
nepair or leplace wrnng
2
ls there continuity between waler lhermosensor
and ECU?
ECU
A (R/L)
20 (R/L)
B C/i G)
2D CYi G)
Go lo nexl step
3
ls resistance of water lhermosensor correcf
Coolant lemp.
Fesislance (kO)
,200c ( -40D
1 4 . 6 1 7 . A
20.c ( 68'D
2.21-2.69
80.c 076'R 0.29-0.35
N o
Beplace waler thermosensor
ls same Code No. prcsent iollowing afler_repair
F Pag€ F-67 Water themosensor and crcuit OK
5
Arc ECU termlnals 2D and 20 voltages corrcct?
c7 page F-l16
n"pru". tCu
17 Psge F_112
Check for shotl circuil in wiring trom water themosensor
lo ECU
Circult DiaEram
ECU
THROTTIE SENSOR
MOSENOR
WATEB fHEFTMOSENSOF
re
@
re
@
\lB
)i
IER THER
l l
F-72