IMM OBIL ILIZ IZE ER SY SYST STE EM
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IMMOBILIZER SYSTEM CONTENTS page
DESCRIPTION AND OPERATION IMMOB IM MOBIL ILIZE IZER R REC R ECEIVER EIVER
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SERVICE PROCEDURES
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IMMO IM MOBILIZE BILIZER R SYSTEM . . . . . . . . . . . . . . . . . .
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IMMOB IM MOBIL ILIZE IZER R TRANSMITTER . . . . . . . . . . . . .
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VEHIC VE HICLE LE IMM IMMO OBILIZE BILIZER R SYSTEM . . . . . . . . . .
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REMOVAL AND INSTALLATION IMMOB IM MOBIL ILIZE IZER R RECE RECEIVER IVER
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POWER-UP POWE R-UP MOD MODE E . . . . . . . . .. . . . . . .. . . . . . 2
DIAGNOSIS AND TESTING IMMOB IM MOBIL ILIZE IZER R DIAG DIAGNO NOSI SIS S
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DESCRIPTION AND OPERATION IM M OB OBILIZE ILIZER R SYSTE SYSTEM M Th e I m m ob ob i li li z er er s y s t em em i n cl cl u d es es t h e f ol ol lo low i n g unique items: • An An i m m ob ob i li li z er er m od od u l e r e ce ce iv iv er er t h a t con t r o ls ls system operation and also controls the RKE and Illuminated entry systems, if equipped. • An An e n co cod e d C r a n k s h a f t P os i t io ion S e n s or or f or or t h e ignition system. The Immobilizer module decodes the s i gn gn a l f r om om t h e c r a n k s h a f t s o t h e P C M ca n r e co cog n i ze ze i t a s a v a l id id C r a n k sh s h a f t P o si s i t io ion S e n so sor s ig ig n a l , a n d allow the engine to run. • A w i r in in g h a r n e s s t h a t i n t er er co con n e ct ct s t h e cr a n k shaft sensor, the immobilizer receiver, and the PCM. • Two Two key fob tra nsmitters. Th e I m m ob ob i li li z er er S y s t e m p r ev ev en en t s u n a u t h o r iz iz ed ed operation of the vehicle by disabling the engine and s t a r t e r. r. Th e s y st st e m w i l l N OT O T a l l ow ow t h e v eh eh i cl cl e t o s t a r t u n le le ss ss t h e U N L O C K b u t t on o n on t h e R K E t r a n s m i t t e r i s p r es es s ed ed . Th e s y s t e m w i l l b e a c t i va va t e d a f t e r turning the ignition switch to the OFF position and using one of the following methods. (1) Press the LOCK button on the RKE transmitter. (2) LOCK the doors by pressing a power lock button switch. (3) L O C K t h e d r i ve ve r o r p a s s en en g er er d oo oor u s in in g t h e key. • Th Th e S e cu cu r i t y l i gh gh t w i l l f l a s h , f o r a b o ut ut 16 s e cconds, indicating that the engine and starter will be disabled. • Th Th e S e cu cu r i t y l ig ig h t r e ma ma i n i n g on , i n d ic ica t e s t h e system is not operational. • Th e I m m ob ob il il iz iz er er w i ll l l a c t iv iv a t e a u t om o m a t i ca ca l l y within 10 minutes of the ignition switch being in the OFF po positio sition, n, wh ether t he vehicle vehicle ha s bee been n lo lock cked ed or unlocked.
An attempt to start the vehicle without pressing t h e U N L OC OC K b ut u t t on on on t h e R K E t r a n sm s m it it t er e r w i ll ll r es es ul u l t i n a w a r n in i n g ch im i m e a n d t h e S ec e cu ri r i t y l ig ig ht ht flashing. •
NOTE: The ignition ignition switch must be in the OFF position in order for the system to be activated, whether the doors are closed or not. IMMOBILIZER RECEIVER Th e i mm mm ob ob il il iz iz er er r ec ece i ve ve r i s p r og og ra r a m m ed ed t o r e sp sp on on d t o t h e L o ck ck a n d U n l o ck ck r a d i o s i g n a l s i s su su e d b y t h e i m m ob ob i li li z er er t r a n s m i t t e r s . Th e r e ce ce iv iv er er w i l l on l y r e sp sp on on d t o t h e r a d i o s i g n a l s o f t r a n s m i t t er er s (u p to four) whose vehicle access codes have been stored in the rec receiv eiver’ er’ss ele electro ctronic nic memo memory ry.. The rec recei eiver ver is programmed at the assembly plant with the vehicle access codes of the two transmitters that are shipped with the vehicle. Th e i m m ob ob i li li z er er r e ce ce iv iv er er a l s o h a s a ce n t r a l p r oocessing unit, which contains the immobilizer system logic lo gic.. The pro programm gramm ing in the immo immobili bilizer zer rec receiv eiver er a l lo l ow s t h e s ys y s t em em t o l ea ea r n a n d r et et a i n t r a n sm s m it it t er er vehicle access codes, as well as to communicate with t h e P o w er e r t r a i n C on on t r ol ol M od od u le le (P C M ) a n d /or t h e D R B s ca ca n t o ol ol on t h e C h r y s l er er C o ll ll i si si on on D e t e ct ct i on on (CCD) data bus network. Th e C C D d a t a b u s n e t w or or k a l lo lo w s t h e s h a r i n g o f sensor information. This helps to reduce wiring harness complex complexity ity,, reduc reduce e internal co controlle ntrollerr ha rdwa re, a n d r e d uc uce com p on on e n t s en en s or or cu r r en en t l oa oa d s . At t h e s a me m e t im i m e, e, t h e C C D d a t a b us us n et et w or or k p r ov ov id id es es increased reliability and enhanced diagnostic capabilities. E a ch i m m ob ob i li li z er er t r a n s m i t t e r h a s a d i ff ff er er e n t v e h i cle access code, which must be programmed into the memory of the immobilizer receiver in the vehicle in orderr to operat orde operat e th e immobilize immobilizerr system. A DRB sc scan an t oo ool m us u s t b e u se se d t o p r og og ra r a m n ew ew or a d d it it i on on a l
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IMMOBILIZER SYSTEM
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DESCRIPTION AND OPERATION (Continued) transmitter vehicle access codes into the memory of the immobilizer receiver. Refer to the Vehicle Theft Security System menu item on the DRB scan tool for the procedures. The immobilizer receiver recognizes the Lock an d Unlock signals received from the programmed immobilizer transmitters. If the code sent by the key fob transmitter is recognized as valid by the Immobilizer module, it w ill decode the Cra nkshaft P osition Sensor s ig n a l, en a b le t h e s t a r t er ci rcu it , a n d a l low t h e e n gi n e t o r u n . Th e i m m ob i li z er r e ce iv er i s m ou n t e d t o t h e d a s h pa n el w i t h a h ook a n d l oop f a st en er pa t ch . I t i s located behind the instrument cluster and above the hea ter-A/C housing. The receiver is connected to th e dash panel cross-body wiring harness. (Fig. 1)
shipped from the factory. Each of the two transmitt e r s i s e q u i pp ed w i t h t w o b u t t on s l a b el ed w i t h I n t e r n a t i o n a l S t a n d a r d s O r g a n i z a t i on (I S O ) s y m b ol s f o r L ock , a n d U n l o ck . Tw o s pa r e b a t t e r i es (e n ou g h f or one transmitter) are also shipped with the transmitters. The transmitters are equipped with a key ring and are designed to serve as a key fob. The operating range of the radio frequency transmitter signal is up to 7 meters (23 feet) from the immobilizer receiver. E a c h t r a n s m it t e r h a s a d if fe ren t v eh i cl e a c ce ss code, which must be programmed into the memory of t h e i m m ob i li z er r e ce iv er i n t h e v eh i cl e i n or d e r t o op er a t e t h e i m m ob i li z er s y s t em . Th e t w o t r a n s m i t t e rs s h ip pe d w i t h t h e v eh i cl e h a v e t h e ir v eh i cl e access codes progra mmed into the receiver a t the factory. A DRB scan tool must be used to program new or a d d i t i on a l t r a n s m i t t e r v eh i cl e a c ce ss cod e s i n t o the memory of the immobilizer receiver. Refer to the Ve hi cl e Th ef t S e cu r it y S y s t em m en u i t em on t h e DRB scan tool for the procedures. Each transmitter operates on two Duracell DL2016 (or equivalent) ba tteries. Typical bat tery life is from one to two years.
POWER-UP MODE
Fig. 1 Immobilizer Module Location For diagnosis of the vehicle immobilizer receiver or t h e C C D d a t a b u s , a D R B s ca n t o ol i s r e q u ir e d . R ef er t o t h e Ve h icl e Th e ft S e cu r i t y S y s t e m m e n u i t em of t h e D R B s ca n t o ol f or t h e p r oce d ur e s. Th e i m m ob i lizer receiver conta ins n o servicable part s. I f fa ulty, t h e u n i t m u s t b e r e pl a ce d .
When the vehicle immobilizer system senses tha t the vehicle battery has been disconnected and reconn e ct e d , i t e n t er s i t s p ow e r -u p m od e . I f t h e i m m ob i lizer sy st em w a s a rmed pr ior t o t he ba t tery disconnect, the system remains armed when the battery is reconnected. I f t h e i m mob il iz er s y st e m w a s d i sa r m ed p ri or t o t h e b a t t e r y d i s con n e ct , t h e s y s t e m w i l l r e m a i n d i sarmed if the battery is reconnected within five minutes. The system will passively arm itself when the battery is reconnected more than five minutes after a battery disconnect or failure. After any passive armi n g, t h e s y st e m w i l l h a v e t o b e a ct i ve ly d is a r m ed using one of the transmitters. The power-up mode logic also applies if the battery g oe s d e a d , a n d b a t t e r y ju m p-s t a r t i n g i s a t t e m p t ed . Th e e n gi n e n o -r u n f ea t u r e w i l l p r ev en t t h e e n g in e from operating until the vehicle immobilizer system has been actively disarmed.
DIAGNOSIS AND TESTING
IMMOBILIZER TRANSMITTER The vehicle immobilizer system includes two transmitters that are supplied with the vehicle when it is
IM M OBILIZER DIAGNOSIS Refer to the 1998 PL Powertrain Diagnostic Manual for complete diagnostic procedures of the immobilizer system.
PL
SERVICE PROCEDURES VEHICLE IMMOBILIZER SYSTEM WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO GROUP 8M - PASSIVE RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY. NOTE: The following tests may not prove conclusive in the diagnosis of this system. The most reliable, efficient, and accurate means to diagnose the Vehicle Immobilizer System involves the use of a DRB scan tool. Refer to the Vehicle Theft Security System menu item on the DRB scan tool for the procedures. The vehicle immobilizer system an d the Chrysler C o ll i si on D e t e ct i on (C C D ) d a t a b u s n e t w or k s h ou l d b e d i a g n os ed u s i n g t h e D R B s ca n t o ol . Th e D R B w i l l a l l ow con f ir m a t i on t h a t t h e C C D d a t a b u s i s f u n ct i on a l , t h a t t h e i m m ob i li z er r e ce iv er i s p la c i n g t h e proper messages on the CCD data bus, and that the P o w e r t r a i n C o n t r ol M od u l e ( P C M ) i s r e ce iv i n g t h e C C D d a t a b u s m e s s a g e s. R e fe r t o t h e Ve h icl e Th e ft Security System menu item on the DRB scan tool for th e procedures. Refer to 8W-39 - Vehicle Theft Security System in Group 8W - Wiring Diagrams for complete circuit descriptions and diagrams. (1) Wi t h t h e i g n it i on s w i t ch i n t h e O f f p o si t i on , depress the Lock or Unlock button of the immobilizer t r a n s m i t t e r. L i s t en f or t h e i m m ob i li z er r e ce iv er t o issue a n audible chirp (Un lock) or chirps (Lock). If OK, go to Step 2. If not OK, replace the transmitter batteries with known good units and repeat Step 1. If still not OK, go to Step 2. (2) Check the fuse in the Power Distribution Center (PDC). If OK, go to Step 3. If not OK, repair the shorted circuit or component as required and replace the faulty fuse. (3) D is con n ect a n d i sol a t e t h e b a t t e ry n eg a t i ve ca b le. U n pl ug t h e w i re h a r n es s con n ect or a t t h e immobilizer receiver. Check for continuity between the ground circuit cavity of the immobilizer receiver w i r e h a r n e s s con n e ct o r a n d a g ood g r ou n d . Th e r e should be continuity. If OK, go to Step 4. If not OK, repair the open circuit to ground as required. (4) C o n n ect t h e b a t t e r y n e ga t i ve ca b l e . C h e c k f o r bat tery voltage a t the fused B (+ ) circuit cavity of th e immobilizer receiver wire ha rness connector. If OK, refer to the Vehicle Theft Security System menu item
IMM OBILIZER SYSTEM
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on t h e D R B s ca n t ool f or f ur t h er d ia g n os is . I f n ot OK , r epa i r t h e open cir cu it t o t h e P D C f us e a s required.
REMOVAL AND INSTALLATION IMMOBILIZER RECEIVER WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO GROUP 8M - PASSIVE RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY. (1) D is con n ect a n d i sol a t e t h e b a t t e r y n eg a t i ve cable. (2) R e mov e t h e I n s t r u m en t P a n e l Top C ov er a n d C l us t er B e z el a n d R ig h t Tr i m p a n el . R em ov e t h e receiver from the dash panel above t he heater-A/C housing (Fig. 2).
Fig. 2 Immobilizer Receiver Remove/Install (3) Unplug the immobilizer receiver from the wire harness connector. (4) Reverse the removal procedures to install. (5) R ef er t o t h e Ve h icl e Th e ft S e cu r i t y S y s t e m m e n u i t e m o n t h e D R B s ca n t o ol f or t h e p r o ce d ur e s to program transmitter vehicle access codes into the memory of the new immobilizer receiver.
