Chrysler 300/300 Touring/300C, Dodge Magnum. Manual - part 450

SWITCH-HEATED SEAT

DESCRIPTION

The heated seat switches (1) are both mounted in the
instrument panel. The two switches are snapped into
mounting holes in the instrument panel center bezel.
The two heated seat switches are identical in appear-
ance and construction.

Each heated seat switch provides a resistor-multi-
plexed signal to the Cab Compartment Node (CCN).
Amber Light Emitting Diodes LEDS) in the top portion
of each switch indicate the level of heat in use: Two
LEDs are illuminated for high, one for low, and none
for off. Pressing the switch once will select high-level
heating. Pressing the switch a second time will select
low-level heating. Pressing the switch a third time will
shut the heating elements off.

The LED indicator lamps in each heated seat switch cannot be repaired. If the LED lamps are inoperative or dam-
aged, or the switch is inoperative or damaged the individual heated seat switch assembly must be replaced.

OPERATION

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 provides a hard-wired resistor multiplexed signal
to the Cabin Compartment Node (CCN). The CCN is responsible for supplying the Controller Area Network (CAN)
data 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.

8G - 82

HEATED SEATS - SERVICE INFORMATION

DIAGNOSIS AND TESTING

HEATED SEAT SWITCH

In order to obtain conclusive testing, the heated seat system and the Controller Area Network (CAN) data bus circuit
must be checked. Any diagnosis of the heated seat system should begin with, the use of a scan tool and the
appropriate diagnostic service information.

Refer to the appropriate wiring information for complete circuit schematic or connector pin-out information.

NOTE: Vehicles equipped with the heated seat option utilize a low voltage cut-off feature. This feature turns
off power to the heated seat system anytime vehicle voltage is below 11.0v or above 15.5v. Be certain to
check the vehicle electrical system for proper voltage anytime the power seat system appears inoperative.

Before any testing of the power seat system is attempted, the battery should be fully-charged.

REMOVAL

1. Disconnect and isolate the battery negative cable.

2. Remove the ash receiver (1) from the instrument

panel, (Refer to 23 - BODY/INSTRUMENT PANEL/
ASH RECEIVER - REMOVAL).

3. Disconnect the heated seat switch connector (2)

from the heated seat switch (3).

4. From the back of the ash receiver (1), gently pry

the switch (3) free and push the heated seat switch
out through the front of the bezel.

INSTALLATION

1. From the front of the ash receiver (1), gently push

the heated seat switch (3) in through the front of
the bezel.