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 MANUALSFORD2014MUSTANG GT, 2D COUPE, AUTOMATIC TRANSREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - PINPOINT TEST H: FUEL CONTROL THROUGH PINPOINT TEST JD: CRANKSHAFT POSITION (CKP) SENSOR - (EXCEPT DIESEL & HYBRID)PINPOINT TEST H: FUEL CONTROLINTRODUCTIONNOTES

2014 Ford Mustang GT, 2D Coupe, Automatic Trans

PINPOINT TEST H: Fuel Control: Introduction: Notes

2014 Ford Mustang GT, 2D Coupe, Automatic TransSECTION Notes

WARNING: WHILE CONDUCTING TESTS ON A HOT ENGINE TAKE ALL SAFETY PRECAUTIONS TO PREVENT SKIN CONTACT WITH HOT ENGINE COMPONENTS. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.

This pinpoint test is intended to diagnose the following:

HO2S (9G444)
universal HO2S (9Y460)
fuel injectors (9F593)
harness circuits: HO2S12, HO2S22, HTR12, HTR22, SIGRTN, UO2SPC and VPWR
vacuum systems
PCM (12A650)

For additional information on heated oxygen sensor (HO2S), refer to CATALYST AND EXHAUST SYSTEMS .

Heated Oxygen Sensor Bank 1, Sensor 2 (HO2S12) Connector

The pin numbering for the connector is in reference to the connector lock tab. Not all connector key combinations are shown.

Fig 1: Identifying Heated Oxygen Sensor Bank 1, Sensor 2 Connector Terminals

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
E-Series, Fiesta TiVCT 1.6L, Motorhome/Stripped Chassis/Step Van	A	1 2 4 3	HTR12 VPWR SIGRTN HO2S12
Escape 1.6L, Fiesta GTDI 1.6L, Transit Connect 1.6L	B	2 1 3 4	HTR12 VPWR SIGRTN HO2S12
F-650/F-750	D	1 2 4 3	HTR12 VPWR SIGRTN HO2S12
Fusion 1.5L	E	2 1 3 4	HTR12 VPWR SIGRTN HO2S12
All other vehicles	C	2 1 3 4	HTR12 VPWR SIGRTN HO2S12

Heated Oxygen Sensor Bank 2, Sensor 2 (HO2S22) Connector

The pin numbering for the connector is in reference to the connector lock tab. Not all connector key combinations are shown.

Fig 2: Identifying Heated Oxygen Sensor Bank 2, Sensor 2 Connector Terminals

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
E-Series	A	1 2 4 3	HTR22 VPWR SIGRTN HO2S22
F-650/F-750	B	1 2 4 3	HTR22 VPWR SIGRTN HO2S22
All other vehicles	C	2 1 3 4	HTR22 VPWR SIGRTN HO2S22

Fig 3: Identifying Universal HO2S Connector Terminals

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Edge 3.5L, Edge 3.7L, Explorer 3.7L, Explorer TiVCT 3.5L, F-150 3.7L, Flex TiVCT 3.5L, MKS 3.7L, MKT 3.7L, MKX, MKZ 3.7L, Mustang 3.7L, Taurus TiVCT 3.5L, Taurus 3.7L	A	1	UO2SPC
Escape 2.5L, Fusion 2.5L, Transit Connect 2.5L	B	6	UO2SPC
All other vehicles	C	1	UO2SPC

RENDER: 1.0x

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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.