Chrysler Stratus Convertible. Manual — part 275

(4) The relay coil ground (-) terminal (85) is con-

nected to the Body Control Module Q33 circuit and
deck lid release switch. This terminal will receive a
ground (-) through the BCM, or the deck lid release
switch, when the key fob transmitter button, or the
deck lid release switch is depressed. If not OK, check
for an open circuit to the BCM and repair as neces-
sary.

(5) When the Vehicle Theft Security System is

armed the BCM opens the ground circuit to the deck
lid release switch.

DIAGNOSTIC CONDITIONS

When trouble shooting problems with the Remote

Keyless Entry System, always verify that the power
door lock/unlock switches are functional. If the doors
do not lock/unlock with the power switches, the fol-
lowing modules should be analyzed: Lock/Unlock
Switches, Body Control Module, and the door lock/
unlock latches. Refer to Group 8W, Wiring Diagrams.
FUSE TEST

If the following modules do not work:
• Remote Keyless Entry System

• Body Control Module

• Door lock switches
A blown fuse is the probable cause. The Body Con-

trol Module (BCM) battery feed fuse are located in
the Power Distribution Center (PDC). Check fuses 4,
15 and 18 in the PDC and fuses 4, 5 and 9 in the
Junction Block.

Key fob transmitter will not lock or unlock doors.

(1) Check that the BCM has power and ground.
(2) If the RKE still doesn’t function. Check the key

fob transmitter batteries for 3 Volts each. If less than
3 Volts, replace the battery.

(3) If the system still does not work, replace the

key fob transmitter. Refer to Programing Remote
Keyless Entry key fob Transmitter.

All doors will not unlock with the key fob
transmitter.

(1) Using a voltmeter, check Pin 4 of the BCM 20

Pin connector for a voltage pulse (Fig. 3). Press the
unlock button once.

(2) If no voltage pulse, replace RKE module. If

voltage is measured, repair the harness between the
BCM and the driver door latch.

(3) Check Pin 1 of the BCM 20 Pin connector for a

quick voltage pulse when the unlock button is
pressed.

(4) If no voltage pulse is measured at Pin 1,

replace the BCM. Repair the harness between termi-
nal and lock latch.

Driver door will NOT unlock with the key fob
transmitter, but passenger door will unlock.

(1) Using a voltmeter, check Pin 4 of the BCM 20

Pin connector for a voltage pulse (Fig. 3). Depress the
unlock button. The voltmeter should read battery
voltage for approximately 1 second.

(2) If no voltage pulse is measured, replace the

BCM. If voltage is measured repair harness from
BCM to the driver door latch.

Driver door will unlock with the key fob
transmitter, but passenger door will not lock.

(1) Using a voltmeter, check Pin 1 of the BCM 20

Pin connector for a voltage pulse (Fig. 3). Press the
unlock button.

(2) If no voltage pulse is measured, replace the

BCM. If voltage is measured, repair the harness to
the door latch.

Doors do not lock with the key fob transmitter.

(1) Using a voltmeter, check Pins 10 and 11 of the

BCM 20 Pin connector for a voltage pulse (Fig. 3).
Press the lock button on the transmitter. Wait for
quick voltage pulse. It may be necessary to press the
key fob transmitter several times. The voltage pulse
only appears for milliseconds.

(2) If no voltage pulse is measured, replace BCM.

If a voltage is measured, repair the Junction Block as
necessary.

Doors will lock with the key fob transmitter but
there is no horn CHIRP.

(1) Press horn button, listen horn sound.
(2) If the horn does not CHIRP, check if horn is

disabled with the scan tool (DRB). Then check the
horn relay and the horn(s). Repair as necessary.

(3) Using a voltmeter, check horn relay for voltage

pulse (Fig. 3). Press the lock button on the key fob
transmitter.

(4) If no voltage pulse measured, replace the BCM.

If voltage is measured, repair harness to the horn
relay.

Fig. 3 BCM 20-Way Connector

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POWER LOCK SYSTEMS

8P - 7

DIAGNOSIS AND TESTING (Continued)

Unable to program BCM with a new key fob
transmitter, door locks will not cycle.

Refer to the proper Body Diagnostic Procedure

Manual.

Unable to program BCM with a new key fob
transmitter, door locks cycle. The locks will not
cycle when the transmitter button is depressed.

Refer to the proper Body Diagnostic Procedure

Manual.

SERVICE PROCEDURES

HORN CHIRP ENABLE/DISABLE

The DRB lll

t scan tool must be used to enable/dis-

able the Horn Chirp. Refer to the DRB lll

t scan tool

for the procedure.

PROGRAMMING RKE MODULE

The DRB lll

t and the transmitter must be used to

program the Remote Keyless Entry Module. Refer to
the DRB lll

t for the procedure.

SYNCHRONIZATION OF ROLLING CODE

The key fob transmitter code will go out of syn-

chronization if any button is press more than 250
times outside the range of the receiver which is
inside of the BCM. In other words the transmitter
will not work. To synchronize the code of a particular
key fob transmitter with the receiver, press and hold
the lock button then the deck lid button simulta-
neously for at lease five seconds. Then wait until the
doors unlock indicating that the code has been syn-
chronized. This may take as long as six minutes.
This is for a key fob transmitter that has been pre-
viously programed to this vehicle only.

TRANSMITTER BATTERY

The transmitter has two 3 volt batteries, which can

be removed and replaced without special tools. The
battery is available at local retail stores. Recom-
mended batteries are Toshiba CR2016 or equivalent.
Battery life is about one to two years.

REMOVAL AND INSTALLATION

BODY CONTROL MODULE (BCM)

Refer to Group 8E, Instrument Panel and Systems

for Removal and Installation.

DECK LID RELEASE RELAY

REMOVAL

(1) Disconnect and isolate the battery negative

remote cable.

(2) The relay is located above the brake pedal to

the right side (Fig. 2).

(3) Grasp the relay and pull downward to discon-

nect the relay.

INSTALLATION

Align the relay pins with the connector terminals

and push the relay in to place.

JUNCTION BLOCK (JB)

Refer to Group 8O, Power Distribution Systems for

Removal and Installation.

SPECIFICATIONS

TRANSMITTER CONTROL RANGE

Operation range is within 7 meters (23 ft.) of the

BCM.

8P - 8

POWER LOCK SYSTEMS

JX

DIAGNOSIS AND TESTING (Continued)

POWER LOCK SYSTEMS

TABLE OF CONTENTS

page

REMOTE KEYLESS ENTRY . . . . . . . . . . . . . . . . . . . 1

REMOTE KEYLESS ENTRY

TABLE OF CONTENTS

page

page

DESCRIPTION AND OPERATION

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DECK LID RELEASE RELAY . . . . . . . . . . . . . . . . . 2
TRANSMITTER BATTERY . . . . . . . . . . . . . . . . . . . 2

DIAGNOSIS AND TESTING

DECK LID RELEASE RELAY TEST . . . . . . . . . . . . 2
DIAGNOSTIC CONDITIONS . . . . . . . . . . . . . . . . . . 3

SERVICE PROCEDURES

HORN CHIRP ENABLE/DISABLE . . . . . . . . . . . . . . 4

SYNCHRONIZATION OF ROLLING CODE . . . . . . . 4

REMOVAL AND INSTALLATION

DECK LID RELEASE RELAY . . . . . . . . . . . . . . . . . 4
BODY CONTROL MODULE (BCM) . . . . . . . . . . . . . 4

ADJUSTMENTS

PROGRAMMING RKE MODULE. . . . . . . . . . . . . . . 4

SPECIFICATIONS

TRANSMITTER CONTROL RANGE . . . . . . . . . . . . 4

DESCRIPTION AND OPERATION

INTRODUCTION

The Remote Keyless Entry System (RKE) allows

locking/unlocking of vehicle door(s) by remote control
using a hand held radio frequency (RF) key fob
transmitter.

The Body Control Module (BCM) may receive sig-

nals from up to four key fob transmitters. Each key
fob transmitter has its own ID with a rolling code.
The code is programmed and stored into BCM mem-
ory. The ID code of the key fob transmitter never
changes. However the rolling code portion changes
every time a button is pressed. If the key fob trans-
mitter is replaced or an additional transmitter is
added, the codes of all units may have to be repro-
grammed into the BCM memory. If a BCM is
replaced, the key fob transmitter codes must be pro-
grammed in the new BCM memory. If a programmed
key fob transmitter button is pressed more than 250
times outside of the vehicle range, the rolling code
will go out of synchronization. In this case the rolling
code has to be synchronized again for complete oper-
ation. Refer to Synchronization of Rolling Code.

OPERATION

The key fob transmitter has three buttons for oper-

ation (Fig. 1). They are LOCK, UNLOCK, and
TRUNK.

Depressing the button:
• UNLOCK button will unlock the driver’s door

and enable illuminated entry, if equipped. Pushing
and releasing the button once will unlock the driver’s
door. Pushing and releasing the button two times,
within five seconds interval, will unlock all doors.

• LOCK button, the horn will sound a short

CHIRP to notify that the all door lock signal was
received and set. The illuminated entry operation
will be cancelled and all interior lamps will immedi-
ately turn OFF.

• DECK LID button will release the deck lid when

the button is pressed twice within two seconds.

The BCM is capable of retaining Vehicle Access

Code (VAC) even when power is removed.

Each Remote Keyless Entry Module must have at

least one and no more than four key fob transmit-
ters.

JX

POWER LOCK SYSTEMS

8P - 1

DECK LID RELEASE RELAY

DESCRIPTION

The Deck Lid Release circuit works in conjunction

with the BCM to prevent unwanted operation after
the Vehicle Theft Security System is set. The VTSS
portion of the BCM will also disable the Universal
Transmitter (garage door opener).

OPERATION

The relay is energized from either the deck lid

release switch or from the BCM from a signal from
the Remote RKE fob transmitter.

TRANSMITTER BATTERY

The transmitter has two 3 volt batteries, which can

be removed and replaced without special tools. The
battery is available at local retail stores. Recom-
mended battery is CR2016 Panasonic or equivalent.
Battery life is about one to two years.

DIAGNOSIS AND TESTING

DECK LID RELEASE RELAY TEST

RELAY TEST

The deck lid release relay is located on the right

side of the brake pedal mounting bracket (Fig. 2).

Remove the starter relay from mounting bracket to

perform the following tests:

(1) A relay in the de-energized position should

have continuity between terminals 87A and 30, and
no continuity between terminals 87 and 30. If OK, go
to Step 2. If not OK, replace the faulty relay.

(2) Resistance between terminals 85 and 86 (elec-

tromagnet) should be 75

65 ohms. If OK, go to Step

3. If not OK, replace the faulty relay.

(3) Connect a battery B+ lead to terminals 86 and

a ground lead to terminal 85 to energize the relay.
The relay should click. Also test for continuity
between terminals 30 and 87, and no continuity

between terminals 87A and 30. If OK, refer to Relay
Circuit Test procedure. If not OK, replace the faulty
relay.

RELAY CIRCUIT TEST

(1) The relay common feed terminal cavity (30) is

connected to battery voltage and should be hot at all
times. If OK, go to Step 2. If not OK, repair the open
circuit to the circuit breaker as required.

Fig. 1 Remote Keyless Entry (RKE) Transmitter

Fig. 2 Deck Lid Release Relay Location

1 – COURTESY ILLUMINATION LAMP RELAY
2 – DECK LID RELEASE RELAY

TERMINAL LEGEND

NUMBER

IDENTIFICATION

30

COMMON FEED

85

COIL GROUND

86

COIL BATTERY

87

NORMALLY OPEN

87A

NORMALLY CLOSED

Deck Lid Release Relay

8P - 2

POWER LOCK SYSTEMS

JX

DESCRIPTION AND OPERATION (Continued)