Pinpoint Test C: Reference Voltage (VREF): Introduction: Notes

NOTE: The APPVREF1/APPVREF2/ETCREF circuits and the APPRTN1/APPRTN2/ETCRTN circuits are internally bussed within the PCM and are dedicated circuits for the APP sensor and the ETBTPS only.

This pinpoint test is intended to diagnose the following:

harness circuits: APPVREF1, APPVREF2, APPRTN1, APPRTN2, ETCREF, ETCRTN, SIGRTN and VREF
accelerator pedal position (APP) sensor (9F836)
air conditioning pressure (ACP) transducer sensor (19D594)
crankcase pressure sensor (6758)
crankshaft position (CKP) sensor (6C315)
camshaft position (CMP) sensor (6B288)
electronic throttle body throttle position sensor (ETBTPS) (9E928)
fuel pressure sensor (9F972)
fuel rail pressure (FRP) sensor (6B288)
fuel tank pressure (FTP) sensor (9C052)
generator current sensor (14B357)
intake manifold runner control bank 1 (IMRC1) sensor (9J559)
intake manifold runner control bank 2 (IMRC2) sensor (9J559)
manifold absolute pressure (MAP) sensor (9F479)
manifold absolute pressure temperature (MAPT) sensor (9F479)
manifold absolute pressure (MAP)/charge air cooler temperature (CACT) sensor (9F479)
manifold absolute pressure (MAP)/intake air temperature 2 (IAT2) sensor (9F479)
turbocharger boost pressure (TCBP) sensor (9F479)
turbocharger boost pressure (TCBP)/charge air cooler temperature (CACT) sensor (9F479)
turbocharger intake pressure and temperature (TCIPT) sensor (9F479)
wastegate vacuum sensor (9F479)
PCM (12A650)

SENSORS VOLTAGE REFERENCE

Applications	APP or FTP or ACP	Fuel Pressure Sensor or FRP	MAP or MAPT or TCBP or TCBP/CACT or MAP/CACT or MAP/IAT2	CKP or CMP	WVS or TCIPT	CPP	Generator Current Sensor	IMRC	Crankcase Pressure Sensor
Escape 2.5L, Fiesta 1.6L TiVCT, Transit Connect 2.5L	X		X
Focus 2.0L GDI	X	X		X
Escape 1.6L, Escape 2.0L, Fiesta 1.0L, Fiesta 1.6L GTDI, Transit Connect 1.6L	X	X	X	X
Edge 2.0L, Edge 2.7L, Explorer 2.0L, F-150 2.7L, F-150 3.5L GTDI, Transit 3.5L	X	X	X	X	X		X
E-Series 5.4L, E-Series 6.8L, F-650/F-750, F-Series Super Duty 6.8L, Mustang 3.7L	X
F-Series Super Duty 6.2L	X			X
Focus 1.0L	X	X	X	X		X			X
Fusion 2.5L	X		X				X
Explorer 3.5L GTDI, Flex 3.5L GTDI, Fusion 1.5L, Fusion 2.0L, MKC, MKS 3.5L, MKT 2.0L, MKT 3.5L, MKZ 2.0L, Taurus 2.0L, Taurus 3.5L GTDI	X	X	X	X			X
Edge 3.5L, Explorer 3.5L TiVCT, Explorer 3.7L, F-150 3.5L TiVCT, F-150 5.0L, Flex 3.5L TiVCT, MKS 3.7L, MKT 3.7L, MKX, MKZ 3.7L, Taurus 3.5L TiVCT, Taurus 3.7L, Transit 3.7L	X						X
Mustang 5.0L	X							X
Focus 2.0L GTDI, Mustang 2.3L	X	X	X	X					X
Expedition, Navigator	X	X	X	X			X		X

Fig 1: Identifying Accelerator Pedal Position (APP) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Fiesta	A	3 1	APPRTN2 APPVREF2
All other vehicles	B	4 6 3 1	APPRTN2 APPVREF2 APPRTN1 APPVREF1

Fig 2: Identifying Air Conditioning Pressure (ACP) Transducer Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Expedition, Navigator	A	1 2	SIGRTN VREF
Fiesta	B	1 2	SIGRTN VREF
All other vehicles	A	1 3	SIGRTN VREF

Fig 3: Identifying Camshaft Position Bank 1 Sensor 1 (CMP11) Sensor Connector (1 Of 2)

Courtesy of FORD MOTOR CO.

Fig 4: Identifying Camshaft Position Bank 1 Sensor 1 (CMP11) Sensor Connector (2 Of 2)

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Edge 2.7L, Edge 3.5L, Expedition, Explorer GTDI 3.5L, F-150 GTDI 3.5L, F-150 2.7L, Flex GTDI 3.5L, MKS 3.5L, MKT 3.5L, Mustang 3.7L, Navigator, Taurus GTDI 3.5L, Transit 3.5L	A	2	SIGRTN
Edge 2.0L, Escape/Kuga 2.0L, Explorer 2.0L, Focus 2.0L, Fusion 2.0L, MKC, MKT 2.0L, MKZ 2.0L, Mustang 2.3L, Taurus 2.0L	B	2 1	SIGRTN VREF
Escape/Kuga 2.5L, Fusion 2.5L, Transit Connect 2.5L	C	3	SIGRTN
Escape/Kuga 1.6L, Fiesta GTDI 1.6L, Fusion 1.5L, Fusion 1.6L	D	1 3	SIGRTN VREF
F-150 5.0L, Mustang 5.0L	E	3	SIGRTN
F-Series Super Duty 6.2L	E	2	SIGRTN
Fiesta TiVCT 1.6L, Focus 1.0L	A	3 1	SIGRTN VREF
Fiesta 1.0L	F	3 1	SIGRTN VREF
Transit Connect 1.6L	F	1 3	SIGRTN VREF
All other vehicles	G	1	SIGRTN

Fig 5: Identifying Camshaft Position Bank 1 Sensor 2 (CMP12) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Escape/Kuga 2.0L, Edge 2.0L, Explorer 2.0L, Focus 2.0L, Fusion 2.0L, MKC, MKT 2.0L, MKZ 2.0L, Mustang 2.3L, Taurus 2.0L	A	1 2	VREF SIGRTN
Edge 2.7L, Expedition, F-150 GTDI 3.5L, F-150 2.7L, Navigator, Transit 3.5L	B	2	SIGRTN
Escape/Kuga 1.6L, Fiesta GTDI 1.6L, Fusion 1.5L, Fusion 1.6L	C	3 1	VREF SIGRTN
Fiesta TiVCT 1.6L, Focus 1.0L	B	1 3	VREF SIGRTN
Fiesta 1.0L	D	1 3	VREF SIGRTN
Transit Connect	D	3 1	VREF SIGRTN
All other vehicles	E	1	SIGRTN

Fig 6: Identifying Clutch Pedal Position (CPP) Sensor Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
1	SIGRTN (Signal Return)
3	VREF (Reference Voltage)

Fig 7: Identifying Crankcase Pressure Sensor Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	SIGRTN (Signal Return)
3	VREF (Reference Voltage)

Fig 8: Identifying Crankshaft Position (CKP) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Edge 2.0L, Focus GTDI 2.0L, Fusion 2.0L, MKZ	A	3 1	SIGRTN VREF
Edge 2.7L, F-150 2.7L	A	1 3	SIGRTN VREF
Escape/Kuga 1.6L	B	2 1	SIGRTN VREF
Escape/Kuga 2.0L, Explorer 2.0L, Focus GDI 2.0L, MKC, MKT 2.0L, Mustang, Taurus 2.0L	B	3 1	SIGRTN VREF
Fiesta, Focus 1.0L, Fusion 1.5L, Fusion 1.6L, Transit Connect	C	2 1	SIGRTN VREF
All other vehicles	A	2 3	SIGRTN VREF

Fig 9: Identifying Electronic Throttle Body Throttle Position Sensor (ETBTPS) Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
E-Series, Explorer GTDI 3.5L, F-Series Super Duty 6.8L, Flex GTDI 3.5L, MKS 3.5L, MKT 3.5L, Motorhome/Stripped Chassis/Step Van, Taurus GTDI 3.5L	A	3 2	ETCRTN ETCREF
Escape/Kuga 1.6L, Fiesta 1.6L, Fusion 1.6L, Transit Connect 1.6L	B	2 6	ETCRTN ETCREF
Fiesta 1.0L, Focus 1.0L, Fusion 1.5L	B	3 1	ETCRTN ETCREF
All other vehicles	C	4 5	ETCRTN ETCREF

Fig 10: Identifying Fuel Pressure Sensor Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	SIGRTN (Signal Return)
3	VREF (Reference Voltage)

Fig 11: Identifying Fuel Rail Pressure (FRP) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Edge 2.7L, Expedition, F-150, Focus GDI 2.0L, Navigator, Transit	A	3 1	SIGRTN VREF
Edge 2.0L, MKC 2.3L, Mustang	B	3 5	SIGRTN VREF
Fusion 1.5L	C	2 1	SIGRTN VREF
All other vehicles	C	1 3	SIGRTN VREF

Fig 12: Identifying Fuel Tank Pressure (FTP) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
E-Series, F-650/F-750, Motorhome/Stripped Chassis/Step Van	A	3 2	VREF SIGRTN
All other vehicles	B	3 2	VREF SIGRTN

Fig 13: Identifying Generator Current Sensor Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	SIGRTN (Signal Return)
1	VREF (Reference Voltage)

Fig 14: Identifying Intake Manifold Runner Control Bank 1 (IMRC1) Sensor Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
3	SIGRTN (Signal Return)
2	VREF (Reference Voltage)

Fig 15: Identifying Intake Manifold Runner Control Bank 2 (IMRC2) Sensor Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
3	SIGRTN (Signal Return)
2	VREF (Reference Voltage)

Fig 16: Identifying Manifold Absolute Pressure (MAP) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Escape/Kuga 1.6L, Escape/Kuga 2.0L, Explorer, Fiesta, Focus, MKC, MKT, Taurus, Transit Connect 1.6L	A	2 3	SIGRTN VREF
Fusion 2.0L, MKZ	C	2 1	SIGRTN VREF
All other vehicles	B	4 2	SIGRTN VREF

Fig 17: Identifying Manifold Absolute Pressure Temperature (MAPT) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Edge 3.5L, F-150 3.5L, Mustang	A	4 2	SIGRTN VREF
All other vehicles	B	1 3	SIGRTN VREF

Fig 18: Identifying Manifold Absolute Pressure/Charge Air Cooler Temperature (MAP/CACT) Sensor Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
1	SIGRTN (Signal Return)
3	VREF (Reference Voltage)

Fig 19: Identifying Manifold Absolute Pressure/Intake Air Temperature 2 (MAP/IAT2) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Edge 2.0L	A	4 2	SIGRTN VREF
Fiesta, MKC, Mustang	A	1 3	SIGRTN VREF
All other vehicles	B	4 2	SIGRTN VREF

Fig 20: Identifying Turbocharger Boost Pressure (TCBP) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
MKC, Fiesta 1.0L	A	1 3	SIGRTN VREF
Edge 2.0L, Fusion 1.5L	B	2 1	SIGRTN VREF
Mustang	C	2 3	SIGRTN VREF

Fig 21: Identifying Turbocharger Boost Pressure/Charge Air Cooler Temperature (TCBP/CACT) Sensor Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Escape/Kuga, Explorer 2.0L, Focus, MKT 2.0L	A	1 3	SIGRTN VREF
Expedition, Navigator	B	1 3	SIGRTN VREF
Fiesta, Fusion, MKC, MKZ, Taurus 2.0L, Transit Connect	C	1 3	SIGRTN VREF
All other vehicles	B	4 2	SIGRTN VREF

Fig 22: Identifying Turbocharger Intake Pressure And Temperature (TCIPT) Sensor Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
1	SIGRTN (Signal Return)
3	VREF (Reference Voltage)

Fig 23: Identifying Wastegate Vacuum Sensor Connector

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	SIGRTN (Signal Return)
1	VREF (Reference Voltage)