GM Service Manual Online
For 1990-2009 cars only

The dash integration module (DIM) monitors and determines the ignition switch status (OFF, ACCESSORY, etc.). When the DIM determines that the ignition switch has been turned to the OFF or RAP Unlock position, it sends a RAP status message via Class 2.

The following modules remain active during the RAP state:

    • CommuniPort® cellular telephone module (PHN)
    • Driver door module (DDM)
    • Driver door switch assembly (DDSA)
    • LH middle door module (LMDM) (w/V4U)
    • LH rear door module (LRDM)
    • Memory seat module (MSM)
    • Navigation data entry processor
    • Navigation data processor
    • Passenger front door module (PFDM)
    • Radio (w/ UY4)
    • Radio (w/o UY4)
    • Radio amplifier (DeVille)
    • Radio amplifier (DHS/DTS)
    • Rear integration module (RIM)
    • RH rear door module (RRDM)
    • RH middle door module (RMDM) (w/V4U)
    • Steering column module

The RIM energizes the RAP relay, allowing supplied voltage to the components. After approximately 10 minutes, the DIM sends out another message via Class 2 to disable the RAP state.

The DIM receives the door status (OPEN, CLOSED) from the door modules via Class 2. When the DIM determines that a passenger compartment door has been opened, it sends out a message via Class 2 to disable the RAP state, regardless of the elapsed time.