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Home >> Isuzu >> 1992 >> Trooper LS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostic System >> Retrieving Codes
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Retrieving Codes

NOTE: Codes can also be retrieved using a Scan tester.
  1. The CHECK ENGINE light will come on when ignition is on and engine is not running. When engine is started, CHECK ENGINE light should go off. If light remains on while engine is running, a trouble code is present.
  2. If light did not come on with key on and engine off, CHECK ENGINE light circuit must be checked before continuing. See DIAGNOSTIC CIRCUIT CHECK under CODE CHARTS if CHECK ENGINE light failed to operate.
  3. To retrieve codes, install a jumper wire between terminals "1" and "3" of ALDL diagnostic connector. ALDL diagnostic connector is located behind center console to right of accelerator pedal. See Fig 1 .
    Fig 1: Identifying ALDL Connector Location (Trooper)
    G92E25126Courtesy of ISUZU MOTOR CO.
  4. Turn ignition on and count number of flashes from CHECK ENGINE light. All codes will be repeated 3 times. See Fig 2 . Each additional code will flash 3 times (starting with lowest code number) and repeat 3 times.
  5. If system is operating properly (with no trouble codes present), a Code 12 should be displayed with ignition on and engine off. This indicates diagnostic system is capable of storing codes and providing diagnostic information.
  6. Each individual code will be repeated 3 times and then display the next code. See Fig 2 . Once all codes are displayed, codes will be repeated. Remove jumper wire from ALDL connector after codes have been retrieved.
Fig 2: Code Display (Typical)
G122168Courtesy of ISUZU MOTOR CO.
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