1998 Mercury Mountaineer Owner Guide 1st Printing - Page 190

Maintenance and care not pass the I/M test with the "check engine/service engine soon" light on. If the vehicle's powertrain system or its battery has just been serviced, the OBD-II system is reset to a "not ready for I/M test" condition. To ready the OBD-II system for I/M testing, a minimum of 30 minutes of city and highway driving is necessary as described below: • First, at least 10 minutes of driving on an expressway or highway. • Next, at least 20 minutes driving in stop and go, city type traffic with at least four idle periods. Allow the vehicle to sit for at least eight hours without starting the engine. Then, start the engine and complete the above driving cycle. The engine must warm up to its normal operating temperature. Once started, do not turn off the engine until the above driving cycle is complete. EXTERIOR BULBS Replacing exterior bulbs Check the operation of the following lamps frequently: • headlamps • foglamps • high-mount brakelamp • brakelamps • turn signals 190