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.
Does a sudden change in voltage occur while monitoring the PID?
Yes | No |
|---|---|
REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test. | Unable to duplicate or identify the concern at this time. GO to Pinpoint Test Z . |
HG11 PCV SYSTEM CHECK
• Start the engine and warm it until engine temperature is stable.
• Disconnect the closure (fresh air) hose from the remote air cleaner or air outlet tube (the tube connecting the mass airflow (MAF) sensor and the throttle body).
• Place a stiff piece of paper over the hose end. Wait 1 minute.
Does vacuum hold the paper in place?
Yes | No |
|---|---|
The PCV system is OK. RETURN to Section 3 , Symptom Charts for further direction. | CHECK for vacuum leaks/obstruction in the PCV system (such as oil cap, PCV valve, hoses, cut grommets, valve cover bolt torque/gasket leak). REFER to the Workshop Manual Section 303-08, Engine Emission Control, Evaporative Emission (EVAP) Control System Vacuum Routing, for PCV system components and routing. REPAIR as necessary. |
HG12 CHECK IF A CONCERN OR DTC IS STILL PRESENT
• Connect the PCV system.
• Clear the PCM DTCs.
• Carry out the PCM self-test.
Is the concern or DTC is still present?
Yes | No |
|---|---|
GO to HG13 . | Unable to duplicate or identify the concern at this time. RETURN to Section 3 , Symptom Charts for further direction. |
HG13 CHECK FOR CORRECT PCM OPERATION
• Disconnect all the PCM connectors.
• Visually inspect for:
◾ pushed out pins ◾ corrosion
• Connect all the PCM connectors and make sure they seat correctly.
• Carry out the PCM self-test.
• Verify the concern is still present.
Is the concern still present?
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.