Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Mercury Villager BaseFACTORY OEM SERVICE PROCEDURE
Test MB: Output Test Mode Not Functioning: Testing
- 1) Check Scan Tool Connections
Turn ignition off. Inspect connection between scan tool and DLC for damaged or corroded pins. Inspect scan tool cables for damage. Repair or replace if necessary and run scan tool SYSTEM READINESS test to verify communication between scan tool and appropriate module. If cables and connections are okay, go to next step. - 2) Check Scan Tool Power Supply
Inspect cables and connection between scan tool and vehicle battery power supply. Check for battery voltage at cigarette lighter. Inspect power connection at cigarette lighter. Repair as necessary and run scan tool SYSTEM READINESS test to verify communication between scan tool and appropriate module. If power supply and data connections are okay, operator error may be at fault. Ensure proper key sequence was used for outputs. Return to OUTPUT TEST MODE under ADDITIONAL SYSTEM FUNCTIONS.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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