Installation; Heated Seat Element Description; Operation; Diagnosis And Testing - Heated Seat Element - Dodge Sprinter 2006 Manual

8G - 12

HEA TED SEA TS

(6) Wor kin g fr om t h e u n der side of t h e swit ch , gen -
t ly r ock t h e swit ch ba ck a n d for t h ou t of it s m ou n t in g
loca t ion in t h e swit ch bezel.
INSTALLA TION
(1) In st a ll t h e h ea t ed sea t swit ch in it s m ou n t in g
loca t ion in t h e swit ch bezel.
(2) Con n ect elect r ica l con n ect ion s.
(3) P osit ion t h e swit ch bezel a n d in st a ll t h e r et a in -
in g scr ew. Refer t o t h e Body sect ion for t h e pr oce-
du r e.
(4) In st a ll t h e st or a ge bin . Refer t o t h e Body sec-
t ion for t h e pr ocedu r e.
(5) In st a ll t h e gea r select or bezel t r im . Refer t o t h e
Body sect ion for t h e pr ocedu r e.
(6) Con n ect t h e n ega t ive ba t t er y ca ble.
H EAT ED SEAT ELEM EN T

DESCRIPTION

Th e h ea t ed sea t syst em in clu des t wo sea t h ea t in g
elem en t s in ea ch fr on t sea t , on e for t h e sea t cu sh ion
(F ig. 1) a n d t h e ot h er for t h e sea t ba ck. All m odels
u se t wo r esist or wir e h ea t in g elem en t s for ea ch sea t
t h a t a r e con n ect ed in ser ies wit h t h e H ea t ed Sea t
Rela y. Th e t em per a t u r e sen sor is a Nega t ive Tem per-
a t u r e Coefficien t (NTC) t h er m ist or. On e t em per a t u r e
sen sor is u sed for ea ch sea t , a n d it is loca t ed in t h e
sea t cu sh ion h ea t in g elem en t for a ll m odels.
Fig. 1 Heated Seat Element - Typical
1 - Seat Back Wire Harness
2 - Heated Seat Wire Harness Connector
3 - Heated Seat Cushion Element
Th e sea t h ea t in g elem en t s a r e glu ed on t o t h e sea t
a n d sea t ba ck cu sh ion s. Th e h ea t ed sea t elem en t s
a n d t h e t em per a t u r e sen sor ca n n ot be a dju st ed or
r epa ir ed a n d, if fa u lt y or da m a ged a n ew sea t a ssem -
bly m u st be in st a lled.
OPERA TION
Th e h ea t ed sea t elem en t s r esist t h e flow of elect r i-
ca l cu r r en t . Wh en ba t t er y cu r r en t is pa ssed t h r ou gh
t h e elem en t s, t h e en er gy lost by t h e r esist a n ce of t h e
elem en t s is r elea sed in t h e for m of h ea t . Th e h ea t ed
sea t t em per a t u r e sen sor is a NTC t h er m ist or. Wh en
t h e t em per a t u r e of t h e sea t cu sh ion cover r ises, t h e
r esist a n ce of t h e sen sor decr ea ses. Th e h ea t ed sea t
r ela y u ses t h is t em per a t u r e sen sor in pu t t o m on it or
t h e t em per a t u r e of t h e sea t , a n d r egu la t es t h e cu r-
r en t flow t o t h e sea t h ea t in g elem en t s a ccor din gly.
DIAGNOSIS AND TESTING - HEA TED SEA T
ELEMENT
F or com plet e cir cu it dia gr a m s, r efer t o Wirin g .
NOTE: When checking heated seat elements for
continuity, be certain to move the heating element
being checked. Moving the element, such as sitting
in the seat will eliminate the possibility of an inter-
mittent open in the element which would only be
evident if the element was in a certain position.
Failure to check the element in various positions
could result in an incomplete test.
(1) Discon n ect a n d isola t e t h e ba t t er y n ega t ive
ca ble. Discon n ect t h e h ea t ed sea t elem en t wir e h a r-
n ess con n ect or fr om u n der t h e sea t cu sh ion . Ch eck
for con t in u it y bet ween t h e sea t h ea t er dr iver cir cu it
a n d gr ou n d. Th er e sh ou ld be con t in u it y, less t h a n 7
oh m s. If OK, go t o St ep 2. If n ot OK, r epla ce t h e sea t
a ssem bly.
(2) Ch eck for con t in u it y bet ween t h e sea t h ea t er
B+ dr iver cir cu it ca vit y a n d t h e sea t ba ck fr a m e.
Th er e sh ou ld be n o con t in u it y. If OK, h ea t in g ele-
m en t is OK a t t h is t im e. If n ot OK, r epla ce t h e sea t
a ssem bly.
H EAT ED SEAT RELAY
DESCRIPTION
Th e h ea t ed sea t r ela y is a n elect r om ech a n ica l
device t h a t swit ch es 12v ba t t er y cu r r en t t o t h e
h ea t ed sea t elem en t s wh en t h e r ela y con t r ol coil is
en er gized. Th e h ea t ed sea t r ela y is loca t ed in t h e
F u se Block, u n der t h e dr iver s sea t . Th e h ea t ed sea t
r ela y is a In t er n a t ion a l St a n da r ds Or ga n iza t ion
(ISO) r ela y. Rela ys con for m in g t o t h e ISO specifica -
t ion s h a ve com m on ph ysica l dim en sion s, cu r r en t
ca pa cit ies, t er m in a l pa t t er n s, a n d t er m in a l fu n ct ion s.
VA