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Home >> Mercury >> 1999 >> Villager Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Additional System Features >> On-Board System Readiness (OSR) Test Mode

On-Board System Readiness (OSR) Test Mode

All OBD-II scan tools must display OSR test. OSR display monitors on vehicle and status of all monitors, complete or not complete. If not complete, scan tool will display which monitors are not complete. To enter OSR, turn ignition off. Ensure test equipment is properly attached. Program scan tool using the following steps: