Heated Seat Element; Description - Dodge dakota 2002 Service Manual

DR
HEATED SEAT SYSTEM (Continued)
Diagnostic logic is built into the heated seat mod-
ule to help the person trying to locate the problem by
the most efficient means possible. Anytime a problem
is suspected, locate the diagnosis and testing proce-
dure for the component in question and follow the
steps until the specific problem is located and
resolved. Once the problem is thought to be cor-
rected, verify correct system operation. If the heated
seat system is functioning correctly return the vehi-
cle to service.
If a problem could not be verified such as not find-
ing anything wrong when following the diagnostic
procedure, this is a good indication that a INTER-
MITTENT problem may be present. You must then
attempt to find the intermittent problem, such as
moving the heating element within the seat while
testing continuity or wiggling the wire harness's/elec-
trical connectors under the seat while testing conti-
nuity. Always, eliminate all other potential problems
before attempting to replace the heated seat module.
PRELIMINARY TEST
Refer to Wiring for the location of complete heated
seat system wiring diagrams. Before testing the indi-
vidual components in the heated seat system, per-
form the following preliminary checks:
WARNING: DISABLE
BEFORE ATTEMPTING ANY STEERING WHEEL,
STEERING COLUMN, OR INSTRUMENT PANEL
COMPONENT DIAGNOSIS OR SERVICE. DISCON-
NECT AND ISOLATE THE BATTERY NEGATIVE
CABLE, THEN WAIT TWO MINUTES FOR THE AIR-
BAG SYSTEM CAPACITOR
BEFORE PERFORMING FURTHER DIAGNOSIS OR
SERVICE. THIS IS THE ONLY SURE WAY TO DIS-
ABLE THE AIRBAG SYSTEM. FAILURE TO TAKE
THE PROPER PRECAUTIONS COULD RESULT IN
ACCIDENTAL AIRBAG DEPLOYMENT AND POSSI-
BLE PERSONAL INJURY.
• If the heated seat switch back lighting and the
cluster illumination lamps do not illuminate with the
headlamps or park lamps turned On, refer to the
Instrument Cluster section of the service manual
for the location of cluster illumination lamp diagnosis
and testing procedures. If the heated seat switch
back lighting does not illuminate, but the cluster illu-
mination lamps do illuminate with the headlamps or
park lamps turned On, refer to Diagnosis and Test-
ing the Heated Seat Switch in this section for the
location of the heated seat switch diagnosis and test-
ing procedures.
• If a single LED indicator lamp for one heated
seat switch does not operate and the heated seat ele-
ments do heat, refer to Diagnosis and Testing the
THE AIRBAG SYSTEM
TO DISCHARGE
HEATED SEAT SYSTEM
Heated Seat Switch in this section for heated seat
switch diagnosis and testing procedures.
• If both LED indicator lamps for a heated seat
switch operate, but the heated seat elements do not
heat, refer to Diagnosis and Testing the Heated
Seat Module in Electronic Control Modules for
heated seat module diagnosis and testing procedures.
• If the indicator lamp on either heated seat
switch remains illuminated after the heated seat has
been turned Off, refer to Diagnosis and Testing
the Heated Seat Module in Electronic Control
Modules for heated seat module diagnosis and test-
ing procedures.

HEATED SEAT ELEMENT

DESCRIPTION

Fig. 2 Heating Element Installed on Seat Cushion
1 - SEAT BACK WIRE HARNESS
2 - HEATED SEAT WIRE HARNESS CONNECTOR
3 - HEATED SEAT CUSHION ELEMENT
Vehicles equipped with the optional heated seat
system have two sets of electrically operated heating
element grids located in each front seat, one set for
the seat cushion and the other set for the seat back.
Each of the heated seat element grids consists of a
single length of resistor wire that is routed in a zig-
zag pattern and captured between a covering and the
adhesive foam rubber backing. Short pigtail wires
with connectors (Fig. 2) are soldered to each end of
each resistor wire element grid, which connect all of
Foam
8G - 5