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Home >> Jeep >> 1991 >> Cherokee Limited >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostic System >> DRB-II Problems & Error Messages >> Blank DRB-II Message Screen
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Blank DRB-II Message Screen

  1. Connect DRB-II to a different vehicle. If message screen is still blank, DRB-II or cable adapter are faulty. Substitute to find faulty component.
  2. If message screen is not blank, DRB-II and cable adapter are functioning properly. Inspect diagnostic connector for proper wire placement, damaged terminals or pushed out pins. Repair as necessary.
  3. If diagnostic connector is okay, use an ohmmeter to check resistance between Black/White or Black/Yellow wire and ground at engine diagnostic connector. If resistance is 10 ohms or more, repair open in Black/White or Black/Yellow wire.
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