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 MANUALSFORD2010FOCUS S, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - DESCRIPTION & OPERATION (EXCEPT DIESEL & HYBRID)POWERTRAIN CONTROL HARDWARE140-PIN PCM

2010 Ford Focus S, Standard

140-Pin PCM

2010 Ford Focus S, StandardSECTION 140-Pin PCM

Fig 1: 140-Pin PCM

Courtesy of FORD MOTOR CO.

140-PIN PCM POWER AND GROUNDS REFERENCE TABLE

Function	Description	Connector/Pin
VPWR	Voltage input to module	B51, B52
PWRGND	Power ground	B67, B68, B69
CSEGND	Case ground	B66
SIGRTN	Signal return	B58, E58
VREF	5 volt reference	B33, E57
KAPWR	Keep alive power	B54

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.