On Board Diagnostic (OBD) Drive Cycle

Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.

2-28 Diagnostic Methods

Description of On Board Diagnostic (OBD) Drive Cycle

The following procedure is designed to execute and complete the OBD monitors. To complete a specific monitor for repair verification, follow steps 1 through 4, then continue with the step described by the appropriate monitor found under the OBD Monitor Exercised column. For the evaporative emissions (EVAP) monitor to run, the ambient air temperature must be between 4.4 to 37.8°C (40 to 100°F), and the altitude below 2,438 meters (8,000 feet). If the OBD monitors must be completed in these conditions, the PCM must detect them once (twice on some applications) before the EVAP monitor can be bypassed and OBD monitors readied. The EVAP bypassing procedure is described in the following drive cycle.

Use a scan tool to carry out the OBD drive cycle. Refer to the scan tool manufacturer's instruction manual for each described function.

A detailed description for clearing the continuous diagnostic trouble codes (DTCs) is found in this section. Refer to Clear The Continuous Diagnostic Trouble Codes (DTCs) And Reset The Emission Monitors Information In The Powertrain Control Module (PCM).

Drive Cycle Recommendations

WARNING: Strict observance of posted speed limits and attention to driving conditions are mandatory when proceeding through the following drive cycles. Failure to follow these instructions may result in personal injury.

1. Most OBD monitors complete more readily using a steady foot driving style during cruise or acceleration modes. Operating the throttle in a smooth fashion minimizes the time required for monitor completion.

2. The fuel tank level should be between 1/2 and 3/4 full with 3/4 full being the most desirable.

3. The evaporative monitor can operate only 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.

4. When bypassing the EVAP engine soak times, the PCM must remain powered (ignition ON) after clearing the continuous DTCs and relearning emission diagnostic information.

For best results, follow each of the following steps as accurately as possible:

OBD Monitor Drive Cycle Procedure Purpose of Drive Cycle Procedure Exercised Drive Cycle NOTE: Bypasses the engine soak timer. Resets the OBD monitor Preparation To bypass the EVAP soak timer (normally 6 hours), the status. PCM must remain powered after clearing the continuous DTCs and resetting the emission monitors information in the PCM. 1. Install the scan tool. Turn the ignition ON with the engine OFF. Cycle the ignition OFF, then ON. If needed, select the appropriate vehicle and engine qualifier. Clear the continuous DTCs and reset the emission monitors information in the PCM. 2. Begin to monitor the following PIDs (if available): AAT, ECT, EVAPDC, FLI, IAT and TP MODE. Start the vehicle without returning the ignition to the OFF position. 3. Idle the vehicle for 15 seconds. Drive at 77 to 104 km/h (48 to 65 mph) until the engine coolant temperature is at least 76.7°C (170°F). Prep for Monitor 4. Is the intake air temperature between 4.4 and 37.8°C Engine warm-up and provides intake air temperature input Entry (40 and 100°F)? If not, complete the following steps, but to the PCM. note that step 14 is required to bypass the EVAP monitor and complete the OBD drive cycle. HO2S 5. Cruise at 77 to 104 km/h (48 to 65 mph) for greater than Executes the HO2S monitor. 5 minutes. EVAP 6. Cruise at 77 to 104 km/h (48 to 65 mph) for 10 minutes Executes the EVAP monitor if the intake air temperature is

Original table alignment retained · Scroll horizontally if needed

(avoid sharp turns and hills). NOTE: To initiate the monitor, between 4.4 to 37.8°C (40 to 100°F). the throttle should be at part throttle, EVAPDC must be

2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015

Source reference 4767

2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.