Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1994RANGER 2WD L4-140 2.3L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSX - CONSTANT CONTROL RELAY MODULE (CCRM)X20 - DOES FAN RUN WITH KEY ON
1994 Ford Ranger 2WD L4-140 2.3L SOHC
X20 - Does Fan Run With Key On
1994 Ford Ranger 2WD L4-140 2.3L SOHCSECTION X20 - Does Fan Run With Key On
Diagnostic Trouble Code (DTC) 564 indicates a Fan Control (FC) / Low Fan Control (LFC) primary circuit failure.
Possible causes are:
- Open or shorted circuit.
- Damaged Constant Control Relay Module (CCRM).
- Damaged Powertrain Control Module (PCM).
- Does the cooling fan always run with the key on?
Yes -- Go to X24. X24 - Check FC/LFC Circuit Continuity
No -- Go to X22. X22 - Check FC/LFC Circuit For Short to Ground
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.