Installation; Starter Motor Relay Description; Operation - Chrysler Vehicle User Manual

8F - 40 STARTING
STARTER MOTOR (Continued)
Fig. 12 STARTER - 4.0L - 42RLE AUTO. TRANS.
1 - BOLT
2 - STARTER MOTOR

INSTALLATION

2.4L
(1) Connect solenoid terminal wire harness connec-
tor to starter solenoid. Always support starter motor
during this process. Do not let starter motor hang
from wire harness.
(2) Install battery cable eyelet onto starter sole-
noid stud. Refer to Torque Specifications.
(3) Position starter motor to transmission. Install
and tighten 2 bolts. Refer to Torque Specifications.
(4) Lower vehicle.
(5) Connect negative battery cable.
4.0L
(1) Connect solenoid terminal wire harness connec-
tor to starter solenoid. Always support starter motor
during this process. Do not let starter motor hang
from wire harness.
(2) Install battery cable eyelet onto starter sole-
noid stud. Refer to Torque Specifications.
(3) Position starter motor to transmission housing.
Loosely install two mounting bolts.
(4) Tighten upper (rearward facing) mounting bolt
to 47.5 N·m (35 ft. lbs.).
(5) Tighten lower (forward facing) mounting bolt to
40.7 N·m (30 ft. lbs.).
(6) Lower vehicle.
(7) Connect negative battery cable.
STARTER MOTOR RELAY
DESCRIPTION
Fig. 13 Starter Relay
TERMINAL LEGEND
NUMBER
30
85
86
87
87A
The starter relay (Fig. 13) is an 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. The starter relay is
located in the Power Distribution Center (PDC), in
the engine compartment. See the fuse and relay lay-
out label affixed to the inside surface of the PDC
cover for starter relay identification and location.
The starter relay is a International Standards
Organization (ISO) micro-relay. Relays conforming to
the ISO specifications have common physical dimen-
sions, current capacities, terminal patterns, and ter-
minal functions. The ISO micro-relay terminal
functions are the same as a conventional ISO relay.
However, the ISO micro-relay terminal pattern (or
footprint) is different, the current capacity is lower,
and the physical dimensions are smaller than those
of the conventional ISO relay.
The starter relay cannot be repaired or adjusted
and, if faulty or damaged, it must be replaced.

OPERATION

The ISO relay consists of an electromagnetic coil, a
resistor or diode, and three (two fixed and one mov-
able) electrical contacts. The movable (common feed)
relay contact is held against one of the fixed contacts
(normally closed) by spring pressure. When the elec-
tromagnetic coil is energized, it draws the movable
contact away from the normally closed fixed contact,
and holds it against the other (normally open) fixed
contact.
IDENTIFICATION
COMMON FEED
COIL GROUND
COIL BATTERY
NORMALLY OPEN
NORMALLY CLOSED
TJ