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Home >> Dodge and Ram >> 1993 >> Grand Caravan Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Body Control Computer >> Vehicle Communication Tests >> Test 2A - Blank DRB-II Message Screen
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Test 2A - Blank DRB-II Message Screen

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.
  1. Disconnect DRB-II. Using an external voltmeter, check Chrysler Collision Detection (CCD) data link connector positive battery circuit (Red wire for AS bodies) for voltage. Connector is located in left rear of engine compartment on YJ bodies and underneath dash at left side of steering column on all others. If voltage is less than 10 volts, repair positive battery circuit as necessary. Perform TEST VER-1.
  2. If voltage is more than 10 volts, turn ignition off. Using an external ohmmeter, check resistance between CCD data link connector ground circuit (Black/Light Green wire for AS bodies) and ground. If resistance is more than 20 ohms, repair open in ground circuit. Perform TEST VER-1.
  3. If resistance is less than 20 ohms, try a different DRB-II adapter cable. If DRB-II screen is no longer blank, replace defective DRB-II adapter cable. Perform TEST VER-1.
  4. If DRB-II screen is still blank, try a different DRB-II cartridge. If DRB-II screen is no longer blank, replace defective DRB-II cartridge. Perform TEST VER-1. If DRB-II screen is still blank, replace defective DRB-II. Perform TEST VER-1.
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