TE S T ACTION AP PLICAB ILITY
3 Tur n th e ign it ion off.
In st all a su bst it u t e r ela y in pla ce of t h e Fu el Lift P u m p Rela y.
Tur n th e ign it ion on .
Wit h th e DRB, a ct u a t e th e Fu el Lift Pu m p Rela y.
Does t h e Fu el Lift P u m p Rela y cycle on an d off?
All
Ye s → Repla ce th e F uel Lift P u m p Rela y.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Go To 4
4 Tur n th e ign it ion off.
Rem ove t h e F uel Lift P u m p Rela y.
Discon n ect t he E CM ha r n ess con n ect or s.
Mea su r e th e resist a n ce bet ween gr oun d a n d t h e F u el Lift Pu m p Rela y Con t r ol
cir cu it .
Is t h e resista n ce a bove 1000 ohm s?
All
Ye s → Go To 5
No → Repa ir t h e F uel Lift P u m p Rela y Con t r ol cir cuit 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.
Rem ove t h e F uel Lift P u m p Rela y.
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 Fu el Lift P u m p Rela y Con t r ol cir cu it .
Is t h e resista n ce below 10.0 ohm s?
All
Ye s → Repla ce a nd pr ogr a m t h e En gin e Con t r ol Modu le in a ccor da n ce
wit h th 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 F u el Lift P u m p Rela y Con t r ol cir cu it for an open .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
6 WARN IN G: WHEN THE E N GIN E IS OP ERATIN G, D O N OT STAN D IN A
DIR ECT LIN E WITH THE FAN . D O N OT P UT YOU R HAN D S NEAR THE
P ULLEYS , B ELTS OR FAN . D O NOT WEAR LOOS E CLOTHIN G.
NOTE: The conditions that set the DTC are not present at this time. The
fo ll o wi n g l is t ma y h e l p i n id en t i fy ing the i n t e rmi tt e nt c o nd i ti o n .
Wit h t h e en gin e r u n n in g a t n or m a l oper a t in g t em per a t u r e, m onit or t h e DRB
pa r a m et er s rela ted t o t h e DTC while wiggling th e wir ing ha r n ess. Look for pa r a m -
et er va lu es t o ch a n ge a n d/or a DTC to set .
Review t h e DTC Wh en Monit or ed a n d Set Con dit ion s. If possible, t r y to du plica t e t h e
condit ion s u n der wh ich t h e DTC wa s set .
Refer t o a n y Tech n ica l Service Bu llet in s (TSB) t h a t m a y a pply.
Visu a lly in spect t h e rela t ed wirin g h a r n ess. Look for a n y ch a fed, pier ced, pin ched, or
pa r t ia lly br oken wir es.
Visu a lly in spect t h e r ela t ed wir ing h a r n ess conn ect or s. Look for br oken , ben t , pu sh ed
out , or cor r oded t er m in a ls.
Wer e an y of t h e above condit ion s pr esen t ?
All
Ye s → Repa ir a s n ecessa ry.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Test Com plet e.
158
DRI V EABI LI T Y - DI ESEL
P 2100-F U EL P U MP RELAY CIRCU IT OP EN CIRCU IT — Co n t i n u ed
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