Memory Heated Seat/Mirror Module: Description

WARNING: This page is about a different car, the 2004 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

There are two different modules that can be used in the optional heated seat system. The Heated Seat Module (HSM) is used on vehicles that are not equipped with the optional Memory System. The Memory Heated Seat Module (MHSM) is used on vehicles that are equipped with the optional Memory System and the optional heated seat system. Refer to Memory System in Power Seat Systems for more information on the memory system option.

The module is mounted on a bracket that is located between the power seat track and the seat cushion frame (Fig 1 ). The HSM or MHSM is used to control the heated seat system functions for both front seats. The HSM or MHSM contains a central processing unit that communicates with other modules on the Programmable Communications Interface (PCI) data bus network.

Fig 1: Heated Seat Module Remove/Install

Courtesy of DAIMLERCHRYSLER CORP.

For diagnosis of the HSM, MHSM or the PCI data bus, a DRBIII(R) scan tool and the proper Diagnostic Procedures manual are recommended. The HSM or MHSM cannot be repaired and, if faulty or damaged, it must be replaced.