Diagnostic System Check - Retained Accessory Power

A Diagnostic System Check - Retained Accessory Power:

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition. Attempt to communicate with the following modules:
^ Communiport(R) cellular telephone module (PHN)
^ Dash integration module (DIM)
^ 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 middle door module (RMDM) (W/V4U)
^ RH rear door module (RRDM)
^ Steering column module
3. The Symptom Table will determine the correct diagnostic procedure to use.
4. The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
7. If DTC B1422 is set, the RAP feature may be disabled.