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.
KF: Fan Control Relays
KF: Introduction
KF1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
Note: For Edge and MKX with 3 pin Cooling Fan Motor 1 and Cooling Fan Motor 2 connectors, GO to Pinpoint Test KN .
Are DTCs P028D, P028E, P0480, P0481 or P0482 present?
Yes | No |
|---|---|
For DTC P028D, P028E, or P0480, GO to KF3 . For DTC P0481, GO to KF8 . For all others, GO to KF13 . | For symptoms without DTCs, GO to KF2 . For all others, RETURN to Section 3 , Symptom Charts for further direction. |
KF2 VERIFY A/C STATUS
• Verify the A/C system is OFF.
• Ignition ON, engine running.
• Access the PCM and monitor the AC_REQ (MODE) PID.
Is A/C being requested?
Yes | No |
|---|---|
REFER to the Workshop Manual Section 412- 00, Climate Control System, to diagnose the A/C system. | GO to KF3 . |
KF3 CHECK THE VOLTAGE TO THE RELAYS
• Ignition OFF.
• For DTCs P028D or P028E,
• Charge Air Cooler Cooling Fan Relay connector disconnected.
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) Charge Air Cooler Cooling Fan Relay Connector, Harness Side | ( - ) |
|---|---|
VPWR - Pin 1 | Ground |
B+ - Pin 3 | Ground |
• For all others,
• FC1 Relay connector disconnected.
• Ignition ON, engine OFF.
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.