Dodge Sprinter 2006 Manual page 870

8F - 10 BA TTERY SYSTEM
(3) Usin g a volt m et er con n ect ed t o t h e ba t t er y
post s (see t h e in st r u ct ion s pr ovided by t h e m a n u fa c-
t u r er of t h e volt m et er ), m ea su r e t h e open -cir cu it volt -
a ge (F ig. 5).
Fig. 5 Testing Open Circuit Voltage
See t h e Open -Cir cu it Volt a ge Ta ble. Th is volt a ge
r ea din g will in dica t e t h e ba t t er y st a t e-of-ch a r ge, bu t
will n ot r evea l it s cr a n kin g ca pa cit y. If a ba t t er y h a s
a n open -cir cu it volt a ge r ea din g of 12.4 volt s or
gr ea t er, it m a y be loa d t est ed t o r evea l it s cr a n kin g
ca pa cit y (Refer t o 8 - E LE CTRICAL/BATTE RY SYS-
TE M/BATTE RY - STANDARD P ROCE DURE ).
OPEN CIRCUIT VOLTAGE TABLE
Open Circuit Voltage
11.7 volts or less
12.0 volts
12.2 volts
12.4 volts
12.6 volts or more
STANDARD PROCEDURE - IGNITION - OFF
DRA W TEST
Th e t er m Ign it ion -Off Dr a w (IOD) iden t ifies a n or-
m a l con dit ion wh er e power is bein g dr a in ed fr om t h e
ba t t er y wit h t h e ign it ion swit ch in t h e Off posit ion . A
n or m a l veh icle elect r ica l syst em will dr a w fr om five
t o t h ir t y-five m illia m per es (0.005 t o 0.035 a m per e)
wit h t h e ign it ion swit ch in t h e Off posit ion , a n d a ll
n on -ign it ion con t r olled cir cu it s in pr oper wor kin g
or der. Up t o t h ir t y-five m illia m per es a r e n eeded t o
en a ble t h e m em or y fu n ct ion s for t h e P ower t r a in Con -
t r ol Modu le (P CM), digit a l clock, elect r on ica lly t u n ed
r a dio, a n d ot h er m odu les wh ich m a y va r y wit h t h e
veh icle equ ipm en t .
Charge Percentage
0%
25%
50%
75%
100%
A veh icle t h a t h a s n ot been oper a t ed for a ppr oxi-
m a t ely t wen t y da ys, m a y disch a r ge t h e ba t t er y t o a n
in a dequ a t e level. Wh en a veh icle will n ot be u sed for
t wen t y da ys or m or e (st or ed), r em ove t h e IOD fu se
fr om t h e fu seblock. Th is will r edu ce ba t t er y disch a r g-
in g.
E xcessive IOD ca n be ca u sed by:
• E lect r ica l it em s left on .
• F a u lt y or im pr oper ly a dju st ed swit ch es.
• F a u lt y or sh or t ed elect r on ic m odu les a n d com po-
n en t s.
• An in t er n a lly sh or t ed gen er a t or.
• In t er m it t en t sh or t s in t h e wir in g.
If t h e IOD is over t h ir t y-five m illia m per es, t h e
pr oblem m u st be fou n d a n d cor r ect ed befor e r epla c-
in g a ba t t er y. In m ost ca ses, t h e ba t t er y ca n be
ch a r ged a n d r et u r n ed t o ser vice a ft er t h e excessive
IOD con dit ion h a s been cor r ect ed.
(1) Ver ify t h a t a ll elect r ica l a ccessor ies a r e off.
Tu r n off a ll la m ps, r em ove t h e ign it ion key, a n d close
a ll door s. If t h e veh icle is equ ipped wit h a n illu m i-
n a t ed en t r y syst em or a n elect r on ica lly t u n ed r a dio,
a llow t h e elect r on ic t im er fu n ct ion of t h ese syst em s
t o a u t om a t ica lly sh u t off (t im e ou t ). Th is m a y t a ke
u p t o t h r ee m in u t es.
(2) Det er m in e t h a t t h e u n der h ood la m p is oper a t -
in g pr oper ly, t h en discon n ect t h e la m p wir e h a r n ess
con n ect or or r em ove t h e la m p bu lb.
(3) Discon n ect t h e ba t t er y n ega t ive ca ble.
(4) Set a n elect r on ic digit a l m u lt i-m et er t o it s
h igh est a m per a ge sca le. Con n ect t h e m u lt i-m et er
bet ween t h e discon n ect ed ba t t er y n ega t ive ca ble t er-
m in a l cla m p a n d t h e ba t t er y n ega t ive t er m in a l post .
Ma ke su r e t h a t t h e door s r em a in closed so t h a t t h e
illu m in a t ed en t r y syst em is n ot a ct iva t ed. Th e m u lt i-
m et er a m per a ge r ea din g m a y r em a in h igh for u p t o
t h r ee m in u t es, or m a y n ot give a n y r ea din g a t a ll
wh ile set in t h e h igh est a m per a ge sca le, depen din g
u pon t h e elect r ica l equ ipm en t in t h e veh icle. Th e
m u lt i-m et er lea ds m u st be secu r ely cla m ped t o t h e
ba t t er y n ega t ive ca ble t er m in a l cla m p a n d t h e ba t -
t er y n ega t ive t er m in a l post . If con t in u it y bet ween t h e
ba t t er y n ega t ive t er m in a l post a n d t h e n ega t ive ca ble
t er m in a l cla m p is lost du r in g a n y pa r t of t h e IOD
t est , t h e elect r on ic t im er fu n ct ion will be a ct iva t ed
a n d a ll of t h e t est s will h a ve t o be r epea t ed.
(5) Aft er a bou t t h r ee m in u t es, t h e h igh -a m per a ge
IOD r ea din g on t h e m u lt i-m et er sh ou ld becom e ver y
low or n on exist en t , depen din g u pon t h e elect r ica l
equ ipm en t in t h e veh icle. If t h e a m per a ge r ea din g
r em a in s h igh , r em ove a n d r epla ce ea ch fu se or cir cu it
br ea ker in t h e F u se Blocks, on e a t a t im e u n t il t h e
a m per a ge r ea din g becom es ver y low, or n on exist en t .
Refer t o t h e a ppr opr ia t e wir in g in for m a t ion in t h is
ser vice m a n u a l for com plet e fu seblock fu se, cir cu it
br ea ker, a n d cir cu it iden t ifica t ion . Th is will isola t e
VA