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X J
DESCRI PT I ON AN D OPERAT I ON (Cont inue d)
Key" code. Th e SKIM t r a n sceiver com pa r es t h e t r a n -
spon der codes wit h t h e codes st or ed in it s m em or y t o
det er m in e wh et h er a va lid key is in t h e ign it ion lock
cylin der.
Th e Sen t r y Key t r a n spon der ca n n ot be r epa ir ed
a n d, if fa u lt y or da m a ged, it m u st be r epla ced.
SENTRY KEY IMMOBILIZER SYSTEM
INDICA TOR LAMP
Th e Sen t r y Key Im m obilizer Syst em (SKIS) in dica -
t or la m p gives a n in dica t ion wh en t h e SKIS is fa u lt y
or wh en t h e veh icle h a s been im m obilized du e t o t h e
u se of a n in va lid ign it ion key. Th e la m p is con t r olled
by t h e in st r u m en t clu st er cir cu it r y ba sed u pon m es-
sa ges r eceived fr om t h e Sen t r y Key Im m obilizer
Modu le (SKIM) on t h e Ch r ysler Collision Det ect ion
(CCD) da t a bu s.
Th e SKIM sen ds m essa ges t o t h e in st r u m en t clu s-
t er t o t u r n t h e la m p on for a bou t t h r ee secon ds wh en
t h e ign it ion swit ch is t u r n ed t o t h e On posit ion a s a
bu lb t est . Aft er com plet ion of t h e bu lb t est , t h e SKIM
sen ds bu s m essa ges t o keep t h e la m p off for a du r a -
t ion of a bou t on e secon d. Th en t h e SKIM sen ds m es-
sa ges t o t h e in st r u m en t clu st er cir cu it r y t o t u r n t h e
la m p on or off ba sed u pon t h e r esu lt s of t h e SKIS
self-t est s. If t h e SKIS in dica t or la m p com es on a n d
st a ys on a ft er t h e bu lb t est , it in dica t es t h a t t h e
SKIM h a s det ect ed a syst em m a lfu n ct ion a n d/or t h a t
t h e SKIS h a s becom e in oper a t ive.
If t h e SKIM det ect s a n in va lid key wh en t h e ign i-
t ion swit ch is t u r n ed t o t h e On posit ion , it sen ds
m essa ges t o t h e in st r u m en t clu st er t o fla sh t h e SKIS
in dica t or la m p. Th e SKIM ca n a lso sen d m essa ges t o
t h e in st r u m en t clu st er t o fla sh t h e la m p a n d t o gen -
er a t e a sin gle a u dible ch im e t on e. Th ese fu n ct ion s
ser ve a s a n in dica t ion t o t h e cu st om er t h a t t h e SKIS
h a s been pla ced in it s "Cu st om er Lea r n " pr ogr a m -
m in g m ode. See Sen t r y Key Im m obilizer Syst em
Tr a n spon der P r ogr a m m in g in t h is gr ou p for m or e
in for m a t ion on t h e "Cu st om er Lea r n " pr ogr a m m in g
m ode.
Th e SKIS in dica t or la m p u ses a r epla cea ble in ca n -
descen t bu lb a n d bu lb h older on t h e in st r u m en t clu s-
t er elect r on ic cir cu it boa r d. Refer t o Gr ou p 8E -
In st r u m en t P a n el Syst em s for dia gn osis a n d ser vice
of a fa u lt y SKIS in dica t or la m p. If t h e SKIS in dica t or
la m p com es on a n d st a ys on a ft er t h e bu lb t est fu n c-
t ion , dia gn osis of t h e SKIS sh ou ld be per for m ed wit h
a DRB sca n t ool a n d t h e pr oper Dia gn ost ic P r oce-
du r es m a n u a l.
VEHICLE THEFT/SECURITY SYSTEMS
DI AGN OSI S AN D T EST I N G
SENTRY KEY IMMOBILIZER SYSTEM
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,
REFER
TO
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING
WHEEL,
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
NOTE: The following tests may not prove conclu-
sive in the diagnosis of this system. The most reli-
able, efficient, and accurate means to diagnose the
Sentry Key Immobilizer System involves the use of
a DRB scan tool. Refer to the proper Diagnostic
Procedures manual for the procedures.
Th e Sen t r y Key Im m obilizer Syst em (SKIS) a n d
t h e Ch r ysler Collision Det ect ion (CCD) da t a bu s n et -
wor k sh ou ld be dia gn osed u sin g a DRB sca n t ool.
Th e DRB will a llow con fir m a t ion t h a t t h e CCD da t a
bu s is fu n ct ion a l, t h a t t h e Sen t r y Key Im m obilizer
Modu le (SKIM) is pla cin g t h e pr oper m essa ges on t h e
CCD da t a bu s, a n d t h a t t h e P ower t r a in Con t r ol Mod-
u le (P CM) a n d t h e in st r u m en t clu st er a r e r eceivin g
t h e CCD da t a bu s m essa ges. Refer t o t h e pr oper
Dia gn ost ic P r ocedu r es m a n u a l for t h e pr ocedu r es.
Refer t o 8W-39 - Veh icle Th eft Secu r it y Syst em in
Gr ou p 8W - Wir in g Dia gr a m s for com plet e cir cu it
descr ipt ion s a n d dia gr a m s.
(1) Ch eck t h e fu ses in t h e fu seblock m odu le. If OK,
go t o St ep 2. If n ot OK, r epa ir t h e sh or t ed cir cu it or
com pon en t a s r equ ir ed a n d r epla ce t h e fa u lt y fu se.
(2) Discon n ect a n d isola t e t h e ba t t er y n ega t ive
ca ble. Un plu g t h e wir e h a r n ess con n ect or a t t h e
SKIM. Ch eck for con t in u it y bet ween t h e gr ou n d cir-
cu it ca vit y of t h e SKIM wir e h a r n ess con n ect or a n d a
good gr ou n d. Th er e sh ou ld be con t in u it y. If OK, go t o
St ep 3. If n ot OK, r epa ir t h e open cir cu it t o gr ou n d
a s r equ ir ed.
(3) Con n ect t h e ba t t er y n ega t ive ca ble. Ch eck for
ba t t er y volt a ge a t t h e fu sed B(+) cir cu it ca vit y of t h e
SKIM wir e h a r n ess con n ect or. If OK, go t o St ep 4. If
n ot OK, r epa ir t h e open cir cu it t o t h e fu se in t h e
fu seblock m odu le a s r equ ir ed.
GROUP
8M
-
PASSIVE
STEERING
COLUMN,
8Q - 3
OR
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