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Home >> Chrysler >> 1991 >> Imperial 3.3 R, A604 >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Computer >> Diagnostic Procedure >> Entering On-Board Diagnostics >> Select System Mode
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Select System Mode

  1. This mode enables the technician to select system to be diagnosed. At DRB-II menu, press "4" (SELECT SYSTEM) key. Press ENTER key. DRB-II will display SELECT SYSTEM menu.
  2. At SELECT SYSTEM menu, press "3" (BODY) key. Press ENTER key. DRB-II should display bus TEST IN PROGRESS, BUS OPERATIONAL, and BODY STYLE menu should appear.
  3. If a bus failure message appears during BUS TEST IN PROGRESS, proceed to VEHICLE COMMUNICATIONS charts. Always start at TEST 1A: GENERAL MESSAGE FAILURES. At BODY STYLE menu, select appropriate body style for vehicle being worked on. DRB-II will display SELECT MODULE MENU.
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