Ford 2003 Mustang Workshop Manual page 2176

SECTION 303-13: Evaporative Emissions
GENERAL PROCEDURES
Evaporative Emission Repair Verification Drive Cycle
Special Tool(s)
Worldwide Diagnostic System
(WDS)
418-F224,
New Generation STAR (NGS)
Tester
418-F052, or equivalent scan
tool
Drive Cycle Recommendations
NOTE: The following procedure is designed to execute and complete the evaporative emission repair
verification drive cycle and to clear the Ford P1000, inspection and maintenance (I/M) readiness code.
When the ambient air temperature is below 4.4°C (40°F) or above 37.8°C (100°F), or the altitude is
above 2,438 meters (8,000 feet), the EVAP monitor will not run. If the P1000 must be cleared in these
conditions, the powertrain control module (PCM) must detect them once (twice on some applications)
before the EVAP monitor can be bypassed and the P1000 cleared. The EVAP bypassing procedure is
described in the following drive cycle.
1. Most OBD II monitors will complete more readily using a steady foot driving style during cruise
or acceleration modes. Operating the throttle in a smooth fashion will minimize the time
necessary for monitor completion.
2. Fuel tank level should be between one-half and three-quarters full with three-quarters full being
the most desirable.
3. The evaporative monitor can only operate during the first 30 minutes of engine operation. When
executing the procedure for this monitor, stay in part throttle mode and drive in a smooth
fashion to minimize fuel slosh.
Drive Cycle Preparation
NOTE: For best results, follow each of the following steps as accurately as possible.
4. NOTE: This step bypasses the engine soak timer and resets OBD II monitor status.
Install the scan tool. Turn the key ON with the engine OFF. Cycle the key off, then on. Select
the appropriate vehicle and engine qualifier. Clear all diagnostic trouble codes (DTCs) and carry
out a PCM reset.
5. Begin to monitor the following PIDs: ECT, EVAPDC, FLI (if available) and TP MODE. Press
Diagnostic Data Link, PCM, PID/Data monitor and record, press trigger to select each PID, then
start.
6. Start the engine without returning the key to the OFF position.
Preparation for Monitor Entry
WARNING: Strict observance of posted speed limits and attention to driving conditions
2003 Mustang Workshop Manual