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Home >> Hummer >> 2009 >> H2 4D Utility Pickup >> Repair and Diagnosis >> Body & Frame >> Seats >> Power Seat System >> Diagnostic Information and Procedures >> Memory Seat Feature Inoperative >> Circuit/System Description
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit/System Description

Reference voltage is supplied to the memory switch from the driver door module (DDM). When a memory switch is pressed, reference voltage is applied through the switch contacts, a series of resistors and thorough the memory switch signal circuit to the DDM. The door module then sends a serial data message to the memory seat module (MSM) indicating the memory recall request. In response to the switch input, the MSM then commands the appropriate seat motors to move to the pre-recorded seat positions stored in memory.