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Home › Jeep › 1990 › Wagoneer › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes - 4.0L › Self-Diagnostic System › Retrieving Codes › Notes

Retrieving Codes: Notes

NOTE: Manufacturer recommends using DRB-II (Diagnostic Readout Box-II) to diagnose the system. See DIAGNOSIS WITH DRB-II & JEEP ADAPTER for complete diagnostic instructions.