TE S T ACTION AP PLICAB ILITY
2 Tur n th e ign it ion off.
Discon n ect t he E CM ha r n ess con n ect or s.
Con n ect a ju m per wir e bet ween gr ou n d a n d t h e En gin e Con t r ol Rela y Con t r ol cir cu 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.
Ch oose th e appropr ia t e resu lt .
All
Test ligh t is on for a ll cir cu it s.
Go To 3
Test ligh t is on for 1 or 2 circu it s
Repa ir t h e E n gin e Con t r ol Rela y Ou tpu t cir cu it (s) th a t did n ot
illu m in a t e br igh t ly for a n open .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
Ligh t off for all cir cu its.
Refer t o sym pt om Ch eckin g t h e ECM P ower a n d Gr ou n ds.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
3 Tur n th e ign it ion off.
Discon n ect t he Cr a n kca se Vent H ea t er ha r n ess con n ect or.
Discon n ect t he E CM ha r n ess con n ect or s.
Mea su r e t h e r esist a n ce of th e bot h cir cu it s bet ween t h e Cr a n k case Ven t H ea ter
ha r n ess con n ect or a n d t h e ECM ha r n ess con n ect or.
Is t h e resista n ce below 10.0 ohm s for ea ch mea su rem en t ?
All
Ye s → Go To 4
No → Repa ir th e Cr an k ca se Ven t H ea t er cir cu it(s) for a n open .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
4 Tur n th e ign it ion off.
Discon n ect t he Cr a n kca se Vent H ea t er ha r n ess con n ect or.
Discon n ect t he E CM ha r n ess con n ect or s.
Mea su r e t h e r esist a n ce bet ween gr ou n d a nd bot h of t h e Cra n k ca se Ven t H ea t er
cir cu it s.
Is t h e resista n ce a bove 1000 ohm s for ea ch circu it ?
All
Ye s → Go To 5
No → Repa ir t h e Cr a nk ca se Ven t H ea t er cir cu it (s) for a sh or t t o gr ou n d.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
5 Tur n th e ign it ion off.
Discon n ect t he Cr a n kca se Vent H ea t er ha r n ess con n ect or.
Discon n ect t he E CM ha r n ess con n ect or s.
Tur n th e ign it ion on .
Mea su r e th e volt a ge of th e both Cr a n kca se Ven t H ea t er cir cu it s.
Is t h e volt a ge below 1.0 volt for ea ch circu it ?
All
Ye s → Go To 6
No → Repa ir th e Cr an k ca se Ven t H ea t er cir cu it for a sh ort t o volt a ge.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
222
DRI V EABI LI T Y - DI ESEL
P 2514-CRAN KCAS E VEN T HEATER OP EN CIRCU IT — Co n t i n u ed