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.
Is any voltage present?
Yes | No |
|---|---|
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. | GO to KN12 . |
KN12 CHECK THE FCV CIRCUIT(S) FOR INTERMITTENT CONCERNS
Note: Some vehicles have more than one cooling fan. Make sure both cooling fans operate correctly.
Note: Not all vehicles have all components listed.
• Ignition OFF.
• CF Motor connector disconnected.
• Cooling Fan Motor 1 connector disconnected.
• Cooling Fan Motor 2 connector disconnected.
• Visually inspect all connectors for:
◾ pushed out pins ◾ corrosion
• CF Motor connector connected.
• CF Module connector connected.
• Cooling Fan Motor 1 connector connected.
• Cooling Fan Motor 2 connector connected.
• PCM connector connected.
• FC Relay connector connected.
• FC1 Relay connector connected.
• FC3 Relay connector connected.
• Ignition ON, engine OFF.
• Access the PCM and control the FAN_DSD (PER) PID.
• Command the fan to full ON.
• While observing the fan, wiggle, shake, and bend small sections of the wiring harness while working from the cooling fan to the PCM.
Is a concern present?
Yes | No |
|---|---|
REPAIR as necessary. If a wiring concern is not present, INSTALL a new cooling fan. REFER to the Workshop Manual Section 303- 03, Engine Cooling. Clear the PCM DTCs. REPEAT the self-test. | The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. |
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.