FORD 2001 Focus - Manual (Page 243)

Maintenance and care
243
Readiness for inspection/
maintenance (I/M) testing
In some localities, it may be a legal
requirement to pass an I/M test of
the onĆboard diagnostics system
(OBDĆII). If your Check engine
light is on, refer to the description
in the Warning Lights and
Chimes section of the
Instrumentation chapter. Your
vehicle may not pass the I/M test
with the Check engine light on.
If the vehicle's powertrain system or
its battery has just been serviced,
the OBDĆII system is reset to a not
ready for I/M test" condition. To
ready the OBDĆII 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 stopĆandĆgo, cityĆtype 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.