Dodge Durango (HB). Manual - part 287
Each momentary, bidirectional rocker-type heated seat
switch provides a resistor-multiplexed signal to the
Cab Compartment Node (CCN). Each switch has a
center neutral position and momentary Low and High
positions so that the driver and the front seat passen-
ger can select a preferred seat heating level. Each
heated seat switch has two Light-Emitting Diode
(LED) indicator lamps, which indicate the selected
level (Low or High) of the seat heater. Each switch
also has one indicator lamp for back lighting of the
switch when the ignition switch is in the Run position.
The five LED indicator lamps in each heated seat switch cannot be repaired. If the LED lamps are faulty or dam-
aged, or the switch is faulty or damaged the individual heated seat switch assembly must be replaced.
OPERATION
HEATED SEAT SWITCH
The heated seat switches receive battery current through a fused ignition switch output (run) circuit when the igni-
tion switch is in the On position. Depressing the heated seat switch rocker to its momentary High or Low position
provides a hard-wired resistor multiplexed signal to the Cabin Compartment Node (CCN). The CCN is responsible
for supplying the CAN bus message to the heated seat module, signaling the module to power the heated seat
element of the selected seat and maintain the temperature setting.
If the heated seat switch is depressed to a different position (Low or High) than the currently selected state, the
CCN will go through the process again to change the temperature setting. If a heated seat switch is depressed a
second time to the same position as the currently selected state, the CCN and heated seat module interprets the
second input as a request to turn the seat heater OFF. The CCN will then signal the heated seat module to turn the
heated seat elements for that seat off.
The backlighting LED’s in each of the heated seat switches receive battery current through a fused ignition switch
output (run) circuit when the ignition switch is in the On position. The ground side of the indicator lamp is divided by
a separate lamp driver circuit in the CCN.
DIAGNOSIS AND TESTING
HEATED SEAT SWITCH
Refer to the Wiring section for complete heated seat system wiring diagrams.
WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE
THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM
CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE
ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS
COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
1. If the problem being diagnosed involves inoperative heated seat switch back lighting and the heated seat ele-
ments do heat, disconnect the inoperative switch and check for continuity between the ground pin at the heated
seat switch connector and ground. If there is no continuity, repair an open wire between ground and the heated
seat switch connector. If there is continuity, replace the inoperative heated seat switch. If the problem being diag-
HB
HEATED SEATS - SERVICE INFORMATION
8G - 95