Mazda 121 Workshop Manual page 174

F
TROUBLESHOOTING
GUIDE
tNsPECT|Oll
ACTION
Connect dlagnosis connector terminals F/P.and
GND with iumper wirei is fuel pump operarng
solnd evided wilh isnilion switch ON?
-7 pege F-92
GND
;)).
Check if iuel is iniecled whib crankng
englne n this condftion
+
lf injected, check circult opening
4
ll not injecred, check inieclor lof
clogging and if lue is in tank
5
ls there conllnuily belween lLlel pump connecior
@ and @?
Check cncuit openrng relay
c7 page F-93
6
ls therc approx. 12V momenlariy at ECU 2V ler_
m naL whib cranking engine?
(Engrne signal monitor green and red amps
ilash)
Try io replace njector (lniector stuck)
N o
Check injeclor lor continuity
+ lf OK, check wlfinS related to
ECU terrninals 2Y, 2V, 2U, and
+
ll not OK, rep ace injeclor
F - l 8