Chrysler PT Cruiser, Service & Repair Manual, Page: 384 / 2078

elements are integral to the front seat and seat back
cushions. Refer to heated seat elements later in this
section for additional information.
•
Heated Seat Module - One heated seat module
is used per vehicle. The module is mounted under the
passenger seat cushion pan, near the forward edge of
the seat. Refer to heated seat module in the elec-
tronic control modules section of the service manual
for additional information.
•
Heated Seat Relay - One heated seat relay is
used per vehicle. The relay is located in the junction
block and is responsible for distributing the voltage
(B+) to the heated seat system.
•
Heated Seat Sensors - Two heated seat sen-
sors are used per vehicle, one for each front seat. The
heated seat sensors are integral to each of the heated
seat element assemblies. Refer to heated seat sensor
later in this section for additional information.
•
Heated Seat Switches - Two heated seat
switches are used per vehicle, one for each front seat.
The switches are mounted to each of the outboard
front seat cushion side shields. Refer to heated seat
switches later in this section for additional informa-
tion.
Hard wired circuitry connects the heated seat sys-
tem components to each other through the electrical
system of the vehicle. These hard wired circuits are
integral to wire harnesses, which are routed through-
out the vehicle and retained by many different meth-
ods. These circuits may be connected to each other, to
the vehicle electrical system and to the heated seat
system components through the use of a combination
of soldered splices, splice block connectors and differ-
ent types of wire harness terminal connectors. Refer
to the appropriate wiring information. The wiring
information includes wiring diagrams, proper wire
and connector repair procedures, further details on
wire harness routing and retention, as well as pin-
out and location views for the various wire harness
connectors, splices and grounds.
OPERATION
The heated seat system is designed to provide indi-
vidually controlled, supplemental heat to the seat
cushion and seat back surfaces of both front seats.
Because this system converts electrical current to
heat, the heated seat system can provide a measure
of warm comfort almost immediately upon entering a
cold vehicle, rather than having to wait for the
engine coolant to reach sufficient temperature to
deliver heat through the conventional heater system.
This system allows each front seat occupant to indi-
vidually select one of two comfort levels, Hi or Lo, or
to turn the heater for their seat off.
The heated seat system components operate on
battery current received through a fuse in the Junc-
tion Block (JB) on a fused ignition switch output
(run-acc) circuit so that the system will only operate
when the ignition switch is in the On or Accessory
positions. The heated seat system will be turned Off
automatically whenever the ignition switch is turned
to any position except On or Accessory. Also, the
heated seat system will not operate when the surface
temperature of the seat cushion cover at either
heated seat sensor is above the designed temperature
set points of the system. The heated seat system has
a self-diagnostic capability. When certain failures are
detected within the heated seat system, the system
will provide a visual indication of the failure by
flashing the Light Emitting Diode (LED) indicator
lamps located in the heated seat switches. See the
owner’s manual in the vehicle glove box for more
information on the features, use and operation of the
heated seat system.
DIAGNOSIS AND TESTING - HEATED SEAT
SYSTEM
Refer to Wiring Diagrams for the appropriate
wiring information. The wiring information includes
wiring diagrams, proper wire and connector repair
procedures, further details on wire harness routing
and retention, as well as pin-out and location views
for the various wire harness connectors, splices and
grounds.
Fig. 1 PT AIRBAG EQUIPPED FRONT SEATS
1 - Front Seat Back Panel
2 - Internal Airbag Location
8G - 2 HEATED SEAT SYSTEM
PT
HEATED SEAT SYSTEM (Continued)