BATTERY
CONTENTS
page
page
GENERAL INFORMATION
INTRODUCTION
. . . . . . . . . . . . . . . . . . . . . . . . 1
OVERVIEW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION
BATTERY MOUNTING . . . . . . . . . . . . . . . . . . . . 3
BATTERY SIZE AND RATINGS . . . . . . . . . . . . . . 2
BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DIAGNOSIS AND TESTING
BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
BUILT-IN TEST INDICATOR
. . . . . . . . . . . . . . . . 6
HYDROMETER TEST . . . . . . . . . . . . . . . . . . . . . 6
IGNITION-OFF DRAW TEST . . . . . . . . . . . . . . . 10
LOAD TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
OPEN-CIRCUIT VOLTAGE TEST
. . . . . . . . . . . . 8
VOLTAGE DROP TEST . . . . . . . . . . . . . . . . . . . 11
SERVICE PROCEDURES
BATTERY CHARGING
. . . . . . . . . . . . . . . . . . . 12
REMOVAL AND INSTALLATION
BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SPECIFICATIONS
BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
GENERAL INFORMATION
OVERVIEW
The battery, starting, and charging systems oper-
ate with one another, and must be tested as a com-
plete system. In order for the vehicle to start and
charge properly, all of the components involved in
these systems must perform within specifications.
Group 8A covers the battery, Group 8B covers the
starting system, and Group 8C covers the charging
system. Refer to Group 8W - Wiring Diagrams for
complete circuit descriptions and diagrams. We have
separated these systems to make it easier to locate
the information you are seeking within this Service
Manual. However, when attempting to diagnose any
of these systems, it is important that you keep their
interdependency in mind.
The diagnostic procedures used in these groups
include the most basic conventional diagnostic meth-
ods, to the more sophisticated On-Board Diagnostics
(OBD) built into the Powertrain Control Module
(PCM). Use of a induction milliampere ammeter, volt/
ohmmeter, battery charger, carbon pile rheostat (load
tester), and 12-volt test lamp may be required.
All OBD-sensed systems are monitored by the
PCM. Each monitored circuit is assigned a Diagnos-
tic Trouble Code (DTC). The PCM will store a DTC in
electronic memory for any failure it detects. See the
On-Board Diagnostics Test in Group 8C - Charging
System for more information.
INTRODUCTION
This section covers only battery diagnostic and ser-
vice procedures. For battery maintenance procedures,
refer to Group 0 - Lubrication and Maintenance.
While battery charging can be considered a mainte-
nance procedure, battery charging information is
located in this group. This was done because the bat-
tery must be fully-charged before any diagnosis can
be performed.
The factory-installed low-maintenance battery has
removable battery cell caps. Water can be added to
this battery. The battery is not sealed and has vent
holes in the cell caps (Fig. 1). The chemical composi-
tion within the low-maintenance battery reduces bat-
tery gassing and water loss, at normal charge and
discharge rates.
Rapid loss of electrolyte can be caused by an over-
charging condition. Be certain to diagnose the charg-
ing system before returning the vehicle to service.
Refer to Group 8C - Charging System for more infor-
mation.
The factory-installed battery in a North American-
built vehicle also has a built-in test indicator
(hydrometer). The color visible in the sight glass of
Fig. 1 Low-Maintenance Battery - Typical
ELECTROLYTE
LEVEL
POSITIVE
POST
VENT
TEST
INDICA-
TOR
VENT
NEGATIVE
POST
GREEN BALL
PLATE GROUPS
LOW-MAINTE-
NANCE
BAT-
TERY
ZG
BATTERY
8A - 1
Summary of Contents for 1997 Grand Cherokee
Page 6: ...FASTENER IDENTIFICATION 4 INTRODUCTION ZG GENERAL INFORMATION Continued ...
Page 9: ...METRIC CONVERSION ZG INTRODUCTION 7 GENERAL INFORMATION Continued ...
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Page 1655: ...Fig 3 Oil Lubrication System ZG 5 2L ENGINE 9 57 DESCRIPTION AND OPERATION Continued ...
Page 1684: ...TORQUE 9 86 5 2L ENGINE ZG SPECIFICATIONS Continued ...
Page 1689: ...Fig 3 Oil Lubrication System ZG 5 9L ENGINE 9 91 DESCRIPTION AND OPERATION Continued ...
Page 1723: ...DIAGNOSIS AND TESTING SERVICE DIAGNOSIS DIESEL PERFORMANCE ZG ENGINE 9 3 ...
Page 1724: ...9 4 ENGINE ZG DIAGNOSIS AND TESTING Continued ...
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Page 1762: ...SPECIFICATIONS ENGINE SPECIFICATIONS 9 42 ENGINE ZG ...
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Page 2122: ...DIAGNOSIS AND TESTING NV231 DIAGNOSIS 21 8 TRANSMISSION AND TRANSFER CASE ZG ...