Engine Controls - Self Diagnostics: Summary

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If no hard trouble codes (or only pass codes) are present, driveability symptoms exist or intermittent Diagnostic Trouble Codes (DTCs) exist, see the following:

For 1995 models, see TESTS W/O CODES article for diagnosis by symptom or intermittent diagnostic procedure.
For 1996 models, see TESTS W/O CODES article for diagnosis by symptom or intermittent diagnostic procedure.
For 1997 XJR models, see TESTS W/O CODES article for diagnosis by symptom or intermittent diagnostic procedure.
For 1997 XJ6 models, see TESTS W/O CODES article for diagnosis by symptom or intermittent diagnostic procedure.