Chrysler Sebring, Stratus sedan, Sebring Convertible. Manual — part 321
recovered, new ignition keys will be required. The
scan tool will alert the technician if key replacement
is necessary. Another security code, called a PIN, is
used to gain secured access to the SKIM for service.
The SKIM also stores in its memory the Vehicle
Identification Number (VIN), which it learns through
a bus message from the assembly plant tester. The
SKIS scrambles the information that is communi-
cated between its components in order to reduce the
possibility of unauthorized SKIM access and/or dis-
abling.
OPERATION
When the ignition switch is moved to the RUN
position, the SKIM transmits an RF signal to the
transponder in the ignition key. The SKIM then
waits for a response RF signal from the transponder
in the key. If the response received identifies the key
as valid, the SKIM sends a
9valid key9 message to
the PCM over the PCI bus. If the response received
identifies the key as invalid or no response is
received from the transponder in the ignition key, the
SKIM sends an
9invalid key9 message to the PCM.
The PCM will enable or disable engine operation
based upon the status of the SKIM messages. It is
important to note that the default condition in the
PCM is
9invalid key.9 Therefore, if no response is
received by the PCM, the engine will be immobilized
after two (2) seconds of running.
The SKIM also sends indicator light status mes-
sages to the BCM to operate the light. This is the
method used to turn the light ON solid or to flash it
after the indicator light test is complete to signify a
fault in the SKIS. If the light comes ON and stays
ON solid after the indicator light test, this signifies
that the SKIM has detected a system malfunction
and/or that the SKIS has become inoperative. If the
SKIM detects an invalid key OR a key-related fault
exists, the indicator light will flash following the
indicator light test. The SKIM may also request an
audible chime if the customer key programming fea-
ture is available and the procedure is being utilized.
Refer to Electrical, Vehicle Theft Security, Transpon-
der Key, Standard Procedure - Transponder Program-
ming.
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY OR DEATH.
(1) Disconnect and isolate the battery negative
remote cable.
(2) Remove knee bolster (Refer to 23 - BODY/IN-
STRUMENT
PANEL/INSTRUMENT
PANEL
ASSEMBLY - REMOVAL).
(3) Remove the steering column upper and lower
shrouds (Refer to 23 - BODY/INSTRUMENT PANEL/
STEERING
COLUMN
OPENING
COVER
-
REMOVAL).
(4) Disengage the steering column wire harness
from the Sentry Key Immobilizer Module (SKIM).
(5) Remove the two screws securing the SKIM
module to the top of the steering column.
(6) Rotate the SKIM and its mounting bracket
upwards and then to the side away from the steering
column to slide the SKIM antenna ring from around
the ignition switch lock cylinder housing.
(7) Remove the SKIM from the vehicle.
INSTALLATION
(1) If the SKIM is replaced with a new unit, a scan
tool MUST be used to initialize the new SKIM and to
program at least two Sentry Key transponders.
(Refer to 8 - ELECTRICAL/VEHICLE THEFT SECU-
Fig. 8 SKIM Remove/Install
1 - IGNITION KEY CYLINDER
2 - STEERING COLUMN
3 - SENTRY KEY IMMOBILIZER MODULE (SKIM)
4 - SKIM CONNECTOR
5 - SKIM ANTENNA
JR
ELECTRONIC CONTROL MODULES
8E - 13
SENTRY KEY IMMOBILIZER MODULE (Continued)
RITY - STANDARD PROCEDURE) Sentry Key
Immobilizer Module Initialization.
(2) Carefully position the SKIM, the mounting
bracket and the antenna ring onto the steering col-
umn.
(3) Install the two retaining screws (Fig. 8).
(4) Connect the wire harness connector.
(5) Install the steering column upper and lower
shrouds (Refer to 23 - BODY/INSTRUMENT PANEL/
STEERING COLUMN OPENING COVER - INSTAL-
LATION).
(6) Install the knee bolster (Refer to 23 - BODY/
INSTRUMENT
PANEL/INSTRUMENT
PANEL
ASSEMBLY - INSTALLATION).
(7) Connect the battery negative remote cable.
8E - 14
ELECTRONIC CONTROL MODULES
JR
SENTRY KEY IMMOBILIZER MODULE (Continued)
ENGINE SYSTEMS
TABLE OF CONTENTS
page
page
STARTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
BATTERY SYSTEM
TABLE OF CONTENTS
page
page
BATTERY SYSTEM
. . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DIAGNOSIS AND TESTING - BATTERY
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
BATTERY
. . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIAGNOSIS AND TESTING - BATTERY
STANDARD PROCEDURE - USING MICRO
BATTERY TESTER . . . . . . . . . . . . . . . . . . 7
CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
STANDARD PROCEDURE - OPEN-CIRCUIT
VOLTAGE TEST . . . . . . . . . . . . . . . . . . . . . . . 10
STANDARD PROCEDURE - IGNITION-OFF
DRAW TEST . . . . . . . . . . . . . . . . . . . . . . . . . 11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . . . . . . . . . . . . 12
BATTERY HOLDDOWN
. . . . . . . . . . . . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
. . . . . . . . . . . . . . . . . . . . . . . . . 13
BATTERY CABLES
. . . . . . . . . . . . . . . . . . . . . . . . . 13
. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
DIAGNOSIS AND TESTING - BATTERY
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . 15
BATTERY TRAY
. . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
. . . . . . . . . . . . . . . . . . . . . . . . . 16
BATTERY HEATER BLANKET
. . . . . . . . . . . . . . . . . . . . . . . . . 16
. . . . . . . . . . . . . . . . . . . . . . . . . . . 17
DIAGNOSIS AND TESTING - BATTERY
. . . . . . . . . . . . . . . . . . . . 17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
. . . . . . . . . . . . . . . . . . . . . . . . . 17
BATTERY SYSTEM
DESCRIPTION
A single 12-volt battery is standard factory-in-
stalled equipment on this model. All of the compo-
nents of the battery system are located in the front of
the vehicle, just ahead of the left front wheel and tire
assembly. The battery system for this vehicle covers
the following related components, which are covered
in further detail later in this section of the service
manual:
• Battery - The storage battery provides a reli-
able means of storing a renewable source of electrical
energy within the vehicle.
• Battery Cables - The battery cables connect
the batteries positive and negative terminals to the
vehicle electrical system.
• Battery Hold-down - The battery hold-down
hardware secures the battery in the battery tray.
JR
ENGINE SYSTEMS
8F - 1
• Battery Heater Blanket - The battery heater
blanket is used to improve battery cold start ability.
• Battery Tray - The battery tray provides a
secure mounting location in the vehicle for the bat-
tery and in some applications, an anchor point for
the battery hold-down hardware.
For battery system maintenance schedules and
jump starting procedure, see the owner’s manual in
the vehicle glove box. Optionally, refer to the Lubri-
cation and Maintenance section of the service man-
ual
for
the
recommended
battery
maintenance
schedules and for the proper battery jump starting
procedure. While battery charging can be considered
a maintenance procedure, the battery charging proce-
dure and related information are located later in this
section of this service manual.
OPERATION
The battery system is designed to provide a safe,
efficient, reliable and mobile means of delivering and
storing electrical energy. This electrical energy is
required to operate the engine starting system, as
well as to operate many of the other vehicle acces-
sory systems for limited durations while the engine
and/or the charging system are not operating. The
battery system is also designed to provide a reserve
of electrical energy to supplement the charging sys-
tem for short durations while the engine is running
and the electrical current demands of the vehicle
exceed the output of the charging system. In addition
to delivering, and storing electrical energy for the
vehicle, the battery system serves as a capacitor and
voltage stabilizer for the vehicle electrical system. It
absorbs most abnormal or transient voltages caused
by the switching of any of the electrical components
or circuits in the vehicle.
DIAGNOSIS AND TESTING - BATTERY SYSTEM
The battery, starting, and charging systems in the
vehicle operate with one another and must be tested
as a single complete system. In order for the engine
to start and the battery to charge properly, all of the
components that are used in these systems must per-
form within specifications. It is important that the
battery, starting, and charging systems be thoroughly
tested and inspected any time a battery needs to be
charged or replaced. The cause of abnormal battery
discharge, overcharging or early battery failure must
be diagnosed and corrected before a battery is
replaced and before a vehicle is returned to service.
The service information for these systems has been
separated within this service manual to make it eas-
ier to locate the specific information you are seeking.
However, when attempting to diagnose any of these
systems, it is important that you keep their interde-
pendency in mind.
The diagnostic procedures used for the battery,
starting, and charging systems include the most
basic conventional diagnostic methods, to the more
sophisticated On-Board Diagnostics (OBD) built into
the Powertrain Control Module (PCM). Use of an
induction-type milliampere ammeter, a volt/ohmme-
ter, a battery charger, a carbon pile rheostat (load
tester) and a 12-volt test lamp may be required. All
OBD-sensed systems are monitored by the PCM.
Each monitored circuit is assigned a Diagnostic Trou-
ble Code (DTC). The PCM will store a DTC in elec-
tronic memory for any failure it detects. Refer to
Charging System for the proper charging system on-
board diagnostic test procedures.
MICRO 420 BATTERY TESTER
The
Micro
420
automotive
battery
tester
is
designed to help the dealership technicians diagnose
the cause of a defective battery. Follow the instruc-
tion manual supplied with the tester to properly
diagnose a vehicle. If the instruction manual is not
available refer to the standard procedure in this sec-
tion, which includes the directions for using the
Micro 420 battery tester.
8F - 2
BATTERY SYSTEM
JR
BATTERY SYSTEM (Continued)
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