Jeep 1997 Grand Cherokee Service Manual page 321

ZG
DESCRIPTION AND OPERATION (Continued)
The starter relay is a electromechanical device that
switches battery current to the pull-in coil of the
starter solenoid when the ignition switch is turned to
the Start position. See the Diagnosis and Testing sec-
tion of this group for more information on the opera-
tion of the starter relay.
The starter relay is located in the Power Distribu-
tion Center (PDC), in the engine compartment. Refer
to the PDC label for relay identification and location.
The starter relay cannot be repaired and, if faulty
or damaged, it must be replaced.
DIAGNOSIS AND TESTING
STARTING SYSTEM
For circuit descriptions and diagrams, refer to
8W-21 - Starting System in Group 8W - Wiring Dia-
grams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING WHEEL,
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
INSPECTION
Before removing any unit from the starting system
for repair or diagnosis, perform the following inspec-
tions:
GROUP 8M - PASSIVE
STEERING COLUMN,
• Battery - Visually inspect the battery for indi-
cations of physical damage and loose or corroded
cable connections. Determine the state-of-charge and
cranking capacity of the battery. Charge or replace
the battery, if required. Refer to Group 8A - Battery
for more information.
• Ignition Switch - Visually inspect the ignition
switch for indications of physical damage and loose
or corroded wire harness connections.
•
Clutch Pedal Position Switch - Visually
inspect the clutch pedal position switch for indica-
tions of physical damage and loose or corroded wire
harness connections.
•
Park/Neutral Position Switch - Visually
inspect the park/neutral position switch for indica-
tions of physical damage and loose or corroded wire
harness connections.
•
Starter Relay - Visually inspect the starter
relay for indications of physical damage and loose or
corroded wire harness connections.
• Starter - Visually inspect the starter for indi-
cations of physical damage and loose or corroded wire
harness connections.
OR
• Starter Solenoid - Visually inspect the starter
solenoid for indications of physical damage and loose
or corroded wire harness connections.
• Wiring - Visually inspect the wire harness for
damage. Repair or replace any faulty wiring, as
required.
STARTING SYSTEMS 8B - 3