Seat Temperature Control Module: Description and Operation
MODULE-HEATED SEATDESCRIPTION
The heated seat module (2) is located behind the right rear D-pillar trim (1). The heated seat module has a single electrical connector (3).
The heated seat module is an microprocessor designed to use CAN bus messages from the cluster Cabin Compartment Node (CCN) to operate the heated seat elements in both front seats.
OPERATION
The heated seat module operates on fused battery current received from the ignition switch. The module is grounded at all times through a ground lug on the right rear D-pillar. Inputs to the module include CAN bus messages and standard hardwired 12 volt power and ground. In response to those inputs the heated seat module controls the battery current to the heated seat elements.
When a heated seat switch CAN bus signal is received by the heated seat module, 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).
If the heated seat module detects a heated seat element OPEN or SHORT circuit, it will record and store an diagnostic trouble code (DTC).