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.
KN: Variable Speed Electric Cooling Fan
KN: Introduction
Motor
KN1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS)
Is DTC P0480 present?
Yes | No |
|---|---|
GO to KN4 . | For symptoms without DTCs, GO to KN2 . For all others, RETURN to Section 3 , Symptom Charts for further direction. |
KN2 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. | For electric cooling fan(s) always on, GO to KN3 . For all others, GO to KN4 . |
KN3 CHECK THE AIR CONDITIONING PRESSURE TRANSDUCER SENSOR
• Ignition OFF.
• Air Conditioning Pressure (ACP) Transducer Sensor connector disconnected.
• Ignition ON, engine running.
Does the cooling fan turn off?
Yes | No |
|---|---|
REFER to the Workshop Manual Section 412- 00, Climate Control System, to diagnose the Air Conditioning Pressure (ACP) Transducer Sensor. | GO to KN4 . |
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.