Starting Systems - Jeep 1997 Grand Cherokee Service Manual

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GENERAL INFORMATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . 1
OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION
STARTER RELAY . . . . . . . . . . . . . . . . . . . . . . . . 2
STARTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
STARTING SYSTEM
DIAGNOSIS AND TESTING
COLD CRANKING TEST
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
The starting system consists of:
• Battery
• Starter relay
• Starter with an integral solenoid
• Ignition switch

STARTING SYSTEMS

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CONTENTS
page
CONTROL CIRCUIT TEST . . . . . . . . . . . . . . . . . 7
FEED CIRCUIT TEST . . . . . . . . . . . . . . . . . . . . . 5
STARTING SYSTEM
REMOVAL AND INSTALLATION
STARTER RELAY . . . . . . . . . . . . . . . . . . . . . . . 11
STARTER
SPECIFICATIONS
STARTING SYSTEM . . . . . . . . . . . . . . . . . . . . . 11
• Clutch pedal position switch (manual transmis-
sion)
• Park/neutral position switch (automatic trans-
mission)
• Wire harness and connections.
This group covers diagnosis of the complete start-
ing system, except the battery. However, this group
only covers service procedures for the starter and
starter relay. Service procedures for other starting
system components can be located as follows:
• Battery - refer to Group 8A - Battery for the
diagnostic and service procedures
• Ignition switch - refer to Group 8D - Ignition
Systems for the service procedures
• Clutch pedal position switch - refer to Group 6 -
Clutch for the service procedures
• Park/neutral position switch - refer to Group 21
- Transmission for the service procedures
• Wire harness and connections - refer to Group
8W - Wiring Diagrams for the service procedures.
NOTE: This group covers both Left-Hand Drive
(LHD) and Right-Hand Drive (RHD) versions of this
model. Whenever required and feasible, the RHD
versions of affected vehicle components have been
constructed as mirror-image of the LHD versions.
While most of the illustrations used in this group
represent only the LHD version, the diagnostic and
service procedures outlined can generally be
applied to either version. Exceptions to this rule
have been clearly identified as LHD or RHD, if a
special illustration or procedure is required.
STARTING SYSTEMS
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8B - 1
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