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.
KN4 COMMAND THE COOLING FAN ON TO CHECK OPERATION
• Ignition ON, engine OFF.
• Access the PCM and control the FAN_DSD (PER) PID.
• Command the fan to full ON.
Does the cooling fan operate when commanded ON?
Yes | No |
|---|---|
The concern is elsewhere. RETURN to Section 3, No Diagnostic Trouble Codes (DTCs) Present Symptom Chart Index for further direction. | GO to KN5 . |
KN5 CHECK THE VOLTAGE TO THE COOLING FAN
• Ignition OFF.
• For Edge and MKX,
• Cooling Fan Motor 1 connector disconnected.
• Cooling Fan Motor 2 connector disconnected.
• Measure the voltage between:
( + ) Cooling Fan Motor 1 Connector, Harness Side | ( - ) |
|---|---|
FANPWR - Pin 2 | Ground |
• Measure the voltage between:
( + ) Cooling Fan Motor 2 Connector, Harness Side | ( - ) |
|---|---|
FANPWR - Pin 2 | Ground |
• For all others,
• CF Module connector disconnected.
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) CF Module Connector, Harness Side | ( - ) |
|---|---|
FANPWR - Pin 1 | Ground |
Is the voltage greater than 10.5 V?
Yes | No |
|---|---|
GO to KN9 . | GO to KN6 . |
KN6 CHECK FOR VOLTAGE TO THE RELAY
• Ignition 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.