Pinpoint Test H: Fuel Control: Introduction: Notes

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2015 Lincoln Navigator, 2015 Lincoln MKZ, 2015 Lincoln MKX, 2015 Lincoln MKT, and 2015 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.

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 (HO2S12) Connector

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
Edge 2.0L, Expedition, F-150 GTDI 3.5L, Fusion 1.5L, Mustang 2.3L, Navigator	B	2 1 3 4	HTR12 VPWR SIGRTN HO2S12
Escape/Kuga 1.6L, Fiesta GTDI 1.6L, Transit Connect 1.6L	D	2 1 3 4	HTR12 VPWR SIGRTN HO2S12
F-650/F-750	E	1 2 4 3	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 (HO2S22) Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
E-Series	A	1 2 4 3	HTR22 VPWR SIGRTN HO2S22
Expedition, F-150 GTDI 3.5L, Navigator	B	2 1 3 4	HTR22 VPWR SIGRTN HO2S22
F-650/F-750	D	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

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Edge 3.5L, Escape/Kuga 2.5L, F-150 TiVCT 3.5L, F-150 5.0L, Fusion 2.5L, Mustang 3.7L, Mustang 5.0L, Transit Connect 2.5L	A	6	UO2SPC
Explorer 3.7L, Explorer TiVCT 3.5L, Flex TiVCT 3.5L, MKS 3.7L, MKT 3.7L, MKX, MKZ 3.7L, Taurus TiVCT 3.5L, Taurus 3.7L, Transit 3.7L	B	1	UO2SPC
All other vehicles	C	1	UO2SPC