Module, Comfort Seat And Wheel: Operation: Operation

WARNING: This page is about a different car, the 2015 Chrysler 200. However, it is still accessible from the selected car via links, so may be relevant.

The Comfort Seat Wheel Module (CSWM) operates on fused battery current received from the ignition switch. The module is grounded to the body at all times through the electrical connector. Inputs to the module include CAN Internal High Speed (IHS) bus data bus messages and standard hardwired 12 volt power and ground. In response to inputs, the CSWM will control the battery current to the appropriate heated seat elements.

When a heated seat switch IHS data bus signal is received by the CWSM, the module energizes the selected heated seat element. The Low heat set point is about 38° C (100.4° F), and the High heat set point is about 42° C (107.6° F).

The CSWM will automatically transition the output from high to low after a maximum period of 60 minutes has elapsed. The CSWM will automatically transition the output from low to off after a maximum period of 45 minutes has elapsed.

In addition to operating the heated seat elements, the heated seat module sends LED illumination messages to the instrument cluster, sometimes referred to as the Cab Compartment Node (CCN). The CCN then sends the LED illumination message to the Integrated Center Stack (ICS) so that the appropriate LEDs are illuminated for any given heating level. 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.

If the CSWM detects a heated seat element OPEN or SHORT circuit, it will record and store the appropriate Diagnostic Trouble Code (DTC).

Driver and Passenger Seat Heat Systems

The element consists of a cushion element connected in parallel with a back element.
The seat cushion has a thermistor to provide feedback to the CSWM.
The seat cushion and seat back has a thermostat to automatically open the feed to the heated seat system.
The heated seat cushion and seat back have a thermostat to automatically open the feed to turn the heated seat system off if the temperature reaches or exceeds 135 °F (+/- 9 ° F).

Vented Seats. Refer to OPERATION .
Heated Seats. Refer to OPERATION .
Heated Steering Wheel. Refer to OPERATION .

The CSWM is diagnosed using a scan tool. If the module detects a heated seat element OPEN or SHORT circuit, the system will turn off and it will record and store the appropriate diagnostic trouble code (DTC). Refer to DIAGNOSIS AND TESTING .