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Jeep Cherokee XJ 1999 Manual

Battery
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XJ
BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
BATTERY CHARGING . . . . . . . . . . . . . . . . . . . . 13
DESCRIPTION AND OPERATION
BATTERY
DESCRIPTION
A large capacity, low-maintenance storage battery
is standard factory-installed equipment on this
model. This battery is designed to provide a safe, effi-
cient and reliable means of storing electrical energy
in a chemical form. This means of energy storage
allows the battery to produce the electrical energy
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 factory-installed low-maintenance bat-
tery 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 composition within the low-maintenance
battery reduces battery gassing and water loss, at
normal charge and discharge rates.
Fig. 1 Low-Maintenance Battery - Typical
BATTERY
CONTENTS
page
BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
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 Charging System in the Diagnosis and
Testing section of Group 8C - Charging System for
more information.
The factory-installed battery also has a built-in
test indicator (hydrometer). The color visible in the
sight glass of the indicator will reveal the battery
condition. Refer to Built-In Test Indicator in the
Diagnosis and Testing section of this group for more
information.
This group covers only the battery diagnostic and
service procedures. For battery maintenance sched-
ules and jump starting procedures, see the owner's
manual in the vehicle glove box, or refer to Mainte-
nance Schedules and Jump Starting, Towing
and Hoisting in Group 0 - Lubrication and Mainte-
nance. While battery charging can be considered a
maintenance procedure, battery charging information
is located in this group. This was done because the
battery must be fully-charged before any diagnosis
can be performed.
Group 8A covers the Battery, Group 8B covers the
Starting Systems, and Group 8C covers the Charging
System. We have separated these systems to make it
easier to locate the information you are seeking
within this Service Manual. However, when attempt-
ing to diagnose any of these systems, it is important
that you keep their interdependency in mind.
The battery, starting, and charging systems in the
vehicle operate with one another, and must be tested
as a complete system. In order for the vehicle to start
and charge properly, all of the components that are
used in these systems must perform within specifica-
tions. 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 discharge, overcharging, or
early battery failure must be diagnosed and corrected
before a battery is replaced or returned to service.
BATTERY
8A - 1
page

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Summary of Contents for Jeep Cherokee XJ 1999

  • Page 1: Table Of Contents

    BATTERY 8A - 1 BATTERY CONTENTS page page DESCRIPTION AND OPERATION REMOVAL AND INSTALLATION BATTERY ....... 1 BATTERY .

  • Page 2: Description And Operation

    8A - 2 BATTERY DESCRIPTION AND OPERATION (Continued) The diagnostic procedures used in each of these age potential of each cell is reduced. However, by groups include the most basic conventional diagnostic charging the battery with a voltage higher than that methods, to the more sophisticated On-Board Diag- of the battery, the battery discharging process is nostics (OBD) built into the Powertrain Control Mod-...

  • Page 3: Diagnosis And Testing Battery

    BATTERY 8A - 3 DESCRIPTION AND OPERATION (Continued) COLD CRANKING AMPERAGE When installing a battery, be certain that the hold down fasteners are tightened to the proper specifica- The Cold Cranking Amperage (CCA) rating specifies tions. Improper hold down fastener tightness, how much current (in amperes) the battery can deliver whether too loose or too tight, can result in damage...
  • Page 4 8A - 4 BATTERY DIAGNOSIS AND TESTING (Continued) WARNING: built-in test indicator, view the test indicator to • IF THE BATTERY SHOWS SIGNS OF FREEZ- determine the state-of-charge. If the battery has no test indicator, but has removable cell caps, perform ING, LEAKING, LOOSE POSTS, OR LOW ELECTRO- LYTE LEVEL, DO NOT TEST, ASSIST-BOOST, OR the hydrometer test to determine the state-of-charge.
  • Page 5 BATTERY 8A - 5 DIAGNOSIS AND TESTING (Continued) Battery Diagnosis Condition Possible Causes Correction The battery seems weak or 1. The battery has an 1. Refer to Battery in the Specifications section of dead when attempting to start incorrect size or rating for this group.

  • Page 6: Service Procedures

    8A - 6 BATTERY DIAGNOSIS AND TESTING (Continued) Battery Diagnosis Condition Possible Causes Correction The battery state-of-charge 1. The battery has an 1. Refer to Battery in the Specifications section of cannot be maintained. incorrect size or rating for this group. Replace an incorrect battery with the this vehicle.

  • Page 7: Service Procedures

    BATTERY 8A - 7 DIAGNOSIS AND TESTING (Continued) Refer to Load Test in the Diagnosis and Testing sec- tery, the battery must be load tested. Refer to Load tion of this group for more information. Test in the Diagnosis and Testing section of this group for more information.
  • Page 8 8A - 8 BATTERY DIAGNOSIS AND TESTING (Continued) In a fully-charged battery the electrolyte will have a temperature-corrected specific gravity of 1.260 to 1.290. However, a specific gravity of 1.235 or above is satisfactory for battery load testing and/or return to service.
  • Page 9 BATTERY 8A - 9 DIAGNOSIS AND TESTING (Continued) the battery may be load tested to determine its (3) Using a voltmeter connected to the battery cranking capacity. Refer to Load Test in the Diagno- posts (see the instructions provided by the manufac- sis and Testing section of this group for more infor- turer of the voltmeter), measure the open-circuit volt- mation.
  • Page 10 8A - 10 BATTERY DIAGNOSIS AND TESTING (Continued) WARNING: • IF THE BATTERY SHOWS SIGNS OF FREEZ- ING, LEAKING, LOOSE POSTS, OR LOW ELECTRO- LYTE LEVEL, DO NOT TEST, ASSIST-BOOST, OR CHARGE. THE BATTERY MAY ARC INTERNALLY AND EXPLODE. PERSONAL INJURY AND/OR VEHI- CLE DAMAGE MAY RESULT.
  • Page 11 BATTERY 8A - 11 DIAGNOSIS AND TESTING (Continued) CHARGE. THE BATTERY MAY ARC INTERNALLY AND EXPLODE. PERSONAL INJURY AND/OR VEHI- CLE DAMAGE MAY RESULT. • EXPLOSIVE HYDROGEN GAS FORMS IN AND AROUND THE BATTERY. DO NOT SMOKE, USE FLAME, OR CREATE SPARKS NEAR THE BATTERY. PERSONAL INJURY AND/OR VEHICLE DAMAGE MAY RESULT.
  • Page 12 8A - 12 BATTERY DIAGNOSIS AND TESTING (Continued) Fig. 12 Test Battery Positive Cable Resistance - Typical Fig. 10 Test Battery Negative Connection Resistance - Typical Fig. 13 Test Ground Circuit Resistance - Typical to twenty-five milliamperes (0.005 to 0.025 ampere) with the ignition switch in the Off position, and all Fig.

  • Page 13: Service Procedures Battery Charging

    BATTERY 8A - 13 DIAGNOSIS AND TESTING (Continued) ing a battery. In most cases, the battery can be lowest milliampere scale of the multi-meter to check charged and returned to service after the excessive the low-amperage IOD. IOD condition has been corrected. CAUTION: Do not open any doors, or turn on any (1) Verify that all electrical accessories are off.

  • Page 14: Battery Charging

    8A - 14 BATTERY SERVICE PROCEDURES (Continued) CAUTION: • Always disconnect and isolate the battery neg- ative cable before charging a battery. Do not exceed sixteen volts while charging a battery. Damage to the vehicle electrical system components may result. •...

  • Page 15: Removal And Installation Battery

    BATTERY 8A - 15 SERVICE PROCEDURES (Continued) tery, the current accepted by the battery will be very low at first. As the battery warms, it will accept a higher charging current rate (amperage). • Charger Capacity - A battery charger that supplies only five amperes will require a longer charging time.
  • Page 16 8A - 16 BATTERY REMOVAL AND INSTALLATION (Continued) Fig. 18 Removing Cell Caps - Typical tions in the Specifications section of this group. Con- firm that the replacement battery is the correct size and has the correct ratings for the vehicle. Fig.

  • Page 17: Specifications

    BATTERY 8A - 17 REMOVAL AND INSTALLATION (Continued) Fig. 21 Battery Cables (4) Connect and tighten the battery positive cable terminal clamp. Then connect and tighten the bat- tery negative cable terminal clamp. Tighten both bat- tery cable terminal clamp bolts to 8.5 N·m (75 in. lbs.).

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