TE S T ACTION AP PLICAB ILITY
12 Tur n th e ign it ion off.
Su bstit u te t h e En gin e Con t r ol Rela y wit h a kn own good r ela y.
Discon n ect t he E CM ha r n ess con n ect or s.
Con n ect a ju mper wir e bet ween gr ou n d a n d t h e E n gin e Con t r ol Rela y Sign al circu it
in ECM C2 h a r ness con n ect or cavit y 44.
Tur n th e ign it ion on .
Usin g a 12-volt test ligh t con n ect ed to grou n d, ch eck th e Fu sed En gin e Con t r ol Rela y
Ou t pu t cir cuit s a t th e ECM C2 h a rn ess con n ect or cavit ies 1, 3 an d 5.
Does t h e test ligh t illu min a t e br igh t ly?
All
Ye s → Repla ce th e in it ia l E n gin e Con t r ol Rela y.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Go To 13
13 Tur n th e ign it ion off.
Rem ove t h e E ngin e Con t r ol Rela y fr om F u se Block No.1
Usin g a 12-volt t est ligh t conn ected to gr ou n d, check bot h Bat t er y (+) cir cu it s a t t h e
En gin e Con t r ol Rela y con n ect or in Fu se Block No.1
Does t h e test ligh t illu min a t e br igh t ly for ea ch circu it?
All
Ye s → Repa ir t h e E n gin e Con t r ol Rela y Ou t pu t cir cu it for a n open
bet ween t h e E n gin e Con t r ol Rela y conn ect or in Fu se Block No. 1
an d E CM C2 h a r n ess con n ect or ca vit ies 1, 3 a n d 5. It m a y be
necessa r y to r epla ce th e Fu se Block No. 1 t o r epa ir t h is cir cu it .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Repa ir t h e Ba t t er y (+) Su pply cir cu it s t o t h e En gin e Con t r ol
Rela y.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
14 Tur n th e ign it ion off.
Rem ove t h e E ngin e Con t r ol Rela y fr om F u se Block No. 1.
Discon n ect t he E CM ha r n ess con n ect or s.
Mea su r e th e resista n ce of t h e En gin e Cont r ol Rela y Con t r ol cir cu it.
Is t h e resista n ce below 10.0 ohm s?
All
Ye s → Go To 15
No → Repa ir th e E n gin e Con t r ol Rela y Con t r ol cir cu it for an open .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
15 Tur n th e ign it ion off.
Rem ove t h e E ngin e Con t r ol Rela y fr om F u se Block No. 1.
Discon n ect t he E CM ha r n ess con n ect or s.
Mea su r e th e volt a ge of th e E ngin e Con t r ol Rela y Con t r ol cir cuit .
Is t h e volt a ge below 1.0 volt s?
All
Ye s → Repla ce a n d progr a m t h e E CM in a ccor da n ce wit h t h e Ser vice
In for m a t ion .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Repa ir th e En gin e Con t r ol Rela y Con t r ol cir cu it for a sh ort to
volt a ge.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
238
DRI V EABI LI T Y - DI ESEL
*CHECKIN G THE P OWER AN D GROUN D S — Co nt in ued