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.
EM25 EVAP SYSTEM REPAIR VERIFICATION
• Reset the keep alive memory (KAM). Refer to Section 2, Resetting The Keep Alive Memory (KAM). This resets the on-board system readiness test.
• To relearn some basic adaptive learning (trim) values, run the engine at 2,500 RPM for 1 minute and idle the engine for 2 minutes.
• Carry out the PCM Quick Test to access any PCM DTCs. For the procedure information, refer to Section 3 , Symptom Charts.
• Carry out the EVAP system leak test and flow check.
Does the vehicle pass the EVAP system leak test and flow check?
Yes | No |
|---|---|
SAVE any repair documentation that may be required by local or federal laws. RETURN the vehicle to the customer. | The original concern was not repaired, or another concern exists. GO to EM1 . |
EM26 REPAIR AND VERIFICATION
Note: If the vehicle needs to be driven for the baseline test, it may be necessary to drive the vehicle first up to 8 km (5 miles) to relearn some additional adaptive learning (trim) values. Also, during the baseline make sure to use the same drive mode that was used for the original baseline test.
• Confirm the vehicle repair.
• Reset the keep alive memory (KAM). Refer to Section 2, Resetting The Keep Alive Memory (KAM). This resets the on-board system readiness test.
• To relearn some basic adaptive learning (trim) values, run the engine at 2,500 RPM for 1 minute and idle the engine for 2 minutes.
• Carry out the PCM Quick Test to access any PCM DTCs. For the procedure information, refer to Section 3 , Symptom Charts. Repair any other DTCs.
• Carry out the baseline test using the exhaust gas analyzer.
• For I/M 240 emission testing areas:
◾ Refer to the beginning of this pinpoint test for information on verifying an excessive grams
per mile indication using a parts per million (PPM) reading.
• All others (original gas concentrations reported in parts per million):
◾ Verify the gas levels are within the acceptable range
Are all gases within the acceptable range?
Yes | No |
|---|---|
SAVE any repair documentation that may be required by local or federal laws. RETURN the vehicle to the customer. | The gas level is still high, or another gas level is above the acceptable range. GO to EM1 . |
EM27 CATALYST DELTA TEMPERATURE TEST
• Complete all previous testing.
• Run the engine for 2 minutes at 2,500 RPM to heat the exhaust system.
• Ignition OFF.
• Disconnect and ground 1 spark plug wire from each cylinder bank (for coil on plug applications, disconnect the coil connector).
• Run the engine at approximately 1,000 RPM.
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.