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Home >> Jeep >> 1991 >> Cherokee Laredo, 2D Utility, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostic System >> Entering On-Board Diagnostics >> Obtaining Fault Codes

Obtaining Fault Codes

  1. Ensure ignition is off. Attach DRB-II to engine diagnostic connector. Connector is located on left side of engine compartment, near SBEC-II. See Fig 1 . Start engine (if possible). Turn A/C switch on, then off (if equipped).
  2. Turn engine off. Without starting engine, turn ignition on and access READ FAULTS function of DRB-II FUEL/IGN MENU. See DRB-II DIAGNOSTIC MODE under DRB-II TEST FUNCTIONS  if necessary.
  3. Record all fault messages displayed by DRB-II, and observe CHECK ENGINE light on instrument cluster. CHECK ENGINE light should come on for 3 seconds and then go out (bulb check).
Fig 1: Locating Diagnostic Connector
G91G13967Courtesy of CHRYSLER MOTORS.
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