Heated Seat Module: Description

Fig 1: Heated Seat Module Location - Typical

Courtesy of DAIMLERCHRYSLER CORP.

One heated seat module is used per vehicle to control both front heated seats. The heated seat module is located on the driver seat cushion pan, where it is secured with two push-pin type plastic fasteners. The module is encased within a small, rectangular, molded plastic housing with a single connector receptacle that allows it to be connected to all of the required inputs and outputs through the power seat wire harness. See Fig 1.

The heated seat module is an electronic microprocessor designed to monitor inputs and control the outputs of the heated seat system. The heated seat module is programmed to provide two levels of heating for each front seat. The Low temperature set point is about 36° C (97° F) and the High temperature set point is about 41° C (105° F). The heated seat module is also programmed to perform self-diagnosis. If the module detects a shorted or open heating element or a Negative Temperature Coefficient (NTC) heated seat sensor out of range the module will flash the heated seat switch LED's, to indicate that a problem exists with the heated seat system. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/MEMORY HEATED SEAT/MIRROR MODULE - DIAGNOSIS AND TESTING)  for additional information.

The heated seat module cannot be adjusted or repaired. If a module is damaged or inoperative, the entire module must be replaced.