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Home >> Jeep >> 1990 >> Comanche Base, 4.0 L, RWD, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Tests W/Codes - 4.0L >> Self-Diagnostic System >> Retrieving Codes >> Notes
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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.
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