Chrysler Town & Country/Voyager, Dodge Caravan, Plymouth Voyager. Manual — part 187
SPECIFICATIONS
TORQUE
COOLING SYSTEM CAPACITY
.
COOLING SYSTEM
7 - 29
ELECTRICAL
GROUP INDEX
Page
Page
DIAGNOSTICS . . . . . . . . . . . . . . . . . . . . . . . . . 8A
. . . . . . . . . . . . . . . . . . . . . . 8D
POWER MIRRORS . . . . . . . . . . . . . . . . . . . . . . . 8T
POWER SEATS
. . . . . . . . . . . . . . . . . . . . . . . . . 8R
BATTERY/STARTING/CHARGING SYSTEMS DIAGNOSTICS
CONTENTS
page
page
ALTERNATOR TEST PROCEDURES ON
VEHICLE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
BATTERY TEST PROCEDURES ON-VEHICLE
. . . 2
FAULT CODES—ON BOARD DIAGNOSTICS . . . 18
GENERAL INFORMATION
. . . . . . . . . . . . . . . . . . 1
IGNITION OFF DRAW (IOD)
. . . . . . . . . . . . . . . . 7
SPECIFICATIONS
. . . . . . . . . . . . . . . . . . . . . . . 23
STARTER TEST PROCEDURES ON VEHICLE
. . . 9
GENERAL INFORMATION
• For Battery, Starter or Alternator Replacement,
refer to Group 8B, Battery/Starter/Alternator Service.
Group 8A, Battery/Starting/Charging Systems Diag-
nostics will cover diagnostics only.
The Battery, Starting, and Charging Systems oper-
ate in conjunction with one another, and must be
thoroughly tested as a complete system. To enable the
vehicle to start and charge properly, it must have a
battery that will perform to specifications. The starter
motor, alternator, wiring, and electronics also must
perform within specifications. Group 8A will cover
Starting (Fig. 1) and Charging System (Fig. 2) diagnos-
tic procedures. These will be covered from the most
basic conventional methods to On Board Diagnostics
(OBD) built into the vehicle’s electronics. The need for
conventional testing equipment has not been elimi-
nated by the introduction of OBD. Frequent use of an
ammeter, volt/ohmmeter, battery charger, carbon pile
rheostat (load tester), and 12 volt (low wattage) test
light will be required.
All front wheel drive vehicles are equipped with OBD
and all OBD sensing systems are monitored by
Fig. 1 Starting System Components
.
ELECTRICAL
8A - 1
the Engine Control computer. The Engine Control
computer will store in electronic memory, any detect-
able failure within the monitored circuits. It will retain
this information for a period of 50 engine starts, then
erase the memory if the failure does not reoccur during
that period. This also will translate a monitored failure
in the form of a FAULT CODE when a readout com-
mand is given. A readout command can be made by
turning the ignition switch to ON-OFF-ON-OFF-ON
without starting the engine. The CHECK ENGINE
LAMP on the instrument cluster will flash in predeter-
mined sequences to show Fault Codes. However, the
Check Engine Lamp cannot express fault codes for all
failures. Fault codes are easier to obtain and more
complete with the use of Diagnostic Tool (DRB II). This
tool is plugged into the diagnostic connector located in
the engine compartment (Fig. 2). Refer to the instruc-
tions provided with the (DRB II) tool being used.
For numbered Fault Codes pertaining to components
within this particular Group, refer to Failure Codes—On
Board Diagnostics in Group 8A. For other numbered Fault
Codes not pertaining to this Group (8A), refer to On Board
Diagnostics in the General Diagnosis section of Group 14,
Fuel System for more information.
BATTERY TEST PROCEDURES ON-VEHICLE
INDEX
page
page
Battery Charging
. . . . . . . . . . . . . . . . . . . . . . . . . . 6
Battery Load Test
. . . . . . . . . . . . . . . . . . . . . . . . . . 4
Battery Open Circuit Voltage Test
. . . . . . . . . . . . . . 4
Causes of Battery Discharging
. . . . . . . . . . . . . . . . 3
General Information
. . . . . . . . . . . . . . . . . . . . . . . . 2
State of Charge Tests
. . . . . . . . . . . . . . . . . . . . . . 3
Test Indicator
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL INFORMATION
The battery stores, stabilizes, and produces electrical
current to operate various electrical systems in the vehicle.
The determination of whether a battery is good or bad is
made by its ability to accept a charge. It also must produce
high-amperage current output over an extended period to
be able to start the vehicle. The capability of the battery to
store electrical current comes from a chemical reaction. This
reaction takes place between the sulfuric acid solution
electrolyte and the lead +/- plates in each cell of the battery.
As the battery discharges, the plates react with the acid
from the electrolyte. When the charging system charges the
battery, the water is converted to sulfuric acid in the
battery. The amount of acid, specific gravity in the electro-
lyte can be measured with a hydrometer. The factory
installed battery is equipped with a built-in hydrometer, as
a test indicator (Figs. 3, 4 and 5) to assist in decide its state
of charge. The factory installed battery is also sealed. Water
cannot and should not be added.
The battery is vented to release gases that are
created when the battery is being charged and dis-
charged. The battery top, posts, and terminals should
be cleaned when other under hood maintenance is
performed (Fig. 3).
WARNING: DO NOT ASSIST BOOST, CHARGE, ADD
WATER, OR LOAD TEST BATTERY WHEN ELECTRO-
LYTE LEVEL IS BELOW THE TOP OF THE PLATES.
PERSONAL INJURY MAY OCCUR.
Fig. 2 Charging System Components
8A - 2
BATTERY/STARTING/CHARGING SYSTEMS DIAGNOSTICS
.
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