Pinpoint Test H: Fuel Control: Introduction

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 .

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 5.4L, Fiesta TiVCT 1.6L	A	1 2 4 3	HTR12 VPWR SIGRTN HO2S12
Edge 2.0L, Expedition, Explorer 2.3L, F-150 GTDI 3.5L, Focus 1.0L, Focus 2.3L, Fusion 1.5L, MKX 2.0L, Mustang 2.3L, Navigator	C	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
KA 1.5L	A	2 1 4 3	HTR12 VPWR SIGRTN HO2S12
All other vehicles	B	2 1 3 4	HTR12 VPWR SIGRTN HO2S12

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 5.4L	A	1 2 4 3	HTR22 VPWR SIGRTN HO2S22
Expedition, F-150 GTDI 3.5L, Navigator	C	2 1 3 4	HTR22 VPWR SIGRTN HO2S22
All other vehicles	B	2 1 3 4	HTR22 VPWR SIGRTN HO2S22

Fig 3: Identifying Universal HO2S Connector

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
E-Series 6.8L, Edge 3.5L, Escape/Kuga 2.5L, Explorer 3.7L, Explorer TiVCT 3.5L, F-150 TiVCT 3.5L, F-150 5.0L, F-650/F-750, Flex TiVCT 3.5L, Fusion 2.5L, MKS 3.7L, MKT 3.7L, MKX 3.7L, Motorhome/Stripped Chassis/Step Van, Mustang 3.7L, Mustang 5.0L, Mustang 5.2L, Taurus 3.7L, Taurus TiVCT 3.5L, Transit 3.7L, Transit Connect 2.5L	A	6	UO2SPC
Fiesta GTDI 1.6L	B	1	UO2SPC
MKZ 3.7L	C	1	UO2SPC
All other vehicles	D	1	UO2SPC

Powertrain Control Module (PCM) Connector

For PCM connector views or reference values, refer to REFERENCE VALUES .

Vehicle	Connector	Pin	Circuit
E-Series 5.4L	190-PIN	E24 E23 T48 B58 T20 B30, B67, B68 T18 B58 T16	UO2SPC21 UO2SPC11 HTR22 SIGRTN HO2S22 VPWR HTR12 SIGRTN HO2S12
EcoSport 2.0L Manual Transmission, EcoSport 1.6L	80 PIN	B39 B2 B30 B38 B49	HTR22 VPWR HTR12 SIGRTN HO2S12
EcoSport 2.0L Automatic Transmission	128 PIN	B11, B12, B31 E14 E41 E29	VPWR HTR12 SIGRTN HO2S12
Edge 2.0L, Escape/Kuga 1.6L, Escape/Kuga 2.0L, Explorer 2.3L, Focus 2.3L, Fusion 1.5L, Fusion 2.0L, MKT 2.0L, MKZ 2.0L, Mustang 2.3L, Taurus 2.0L, Transit Connect 1.6L	198 PIN	E63 B101, B102, B103 B1 B38 B57	UO2SPC11 VPWR HTR12 SIGRTN HO2S12
Edge 2.7L, Expedition, Explorer GTDI 3.5L, F-150 2.7L, F-150 GTDI 3.5L, Flex GTDI 3.5L, MKS 3.5L, MKT 3.5L, MKX 2.7L, Navigator, Taurus GTDI 3.5L, Transit 3.5L	198 PIN	E61 E63 B61 B37 B56 B101, B102, B103 B1 B38 B57	UO2SPC21 UO2SPC11 HTR22 SIGRTN HO2S22 VPWR HTR12 SIGRTN HO2S12
Escape/Kuga 2.5L, Fusion 2.5L	190-PIN	E23 B67, B68 T49 T41 T29	UO2SPC11 VPWR HTR12 SIGRTN HO2S12
F-650/F-750	198 PIN	E36 E35 B97, B99 E78 B71 B72	UO2SPC21 UO2SPC11 VPWR HTR12 SIGRTN HO2S12
F-Series Super Duty 6.2L	190-PIN	T28 T29 T49 T26 T27 B67, B68 T47 T26 T18	UO2SPC21 UO2SPC11 HTR22 SIGRTN HO2S22 VPWR HTR12 SIGRTN HO2S12
F-Series Super Duty 6.8L	190-PIN	T28 T29 T26 B67, B68 T48 T26 T30	UO2SPC21 UO2SPC11 SIGRTN VPWR HTR12 SIGRTN HO2S12
Fiesta GTDI 1.6L, Fiesta 1.0L	198 PIN	E39 B101, B102, B103 B1 B37 B57	UO2SPC11 VPWR HTR12 SIGRTN HO2S12
Fiesta TiVCT 1.6L	128 PIN	E8 B11, B12, E13, E37 E35 E9 E21	UO2SPC11 VPWR HTR12 SIGRTN HO2S12
Focus 1.0L, MKX 2.0L	198 PIN	E63 B101, B102, B103 B1 B37 B57	UO2SPC11 VPWR HTR12 SIGRTN HO2S12
Focus GDI 2.0L	154 PIN	E64 B5, B6 B20 B21 B48	UO2SPC11 VPWR HTR12 SIGRTN HO2S12
Focus GTDI 2.0L, MKC	198 PIN	E63 B101, B102, B103 B1 B37 B56	UO2SPC11 VPWR HTR12 SIGRTN HO2S12
KA	128 PIN	B36, E24 E36 E8 E19	VPWR HTR12 SIGRTN HO2S12
MKZ 3.7L	190-PIN	E24 E23 T48 E49 T40 B67, B68 T49 E49 T29	UO2SPC21 UO2SPC11 HTR22 SIGRTN HO2S22 VPWR HTR12 SIGRTN HO2S12
Transit Connect 2.5L	198 PIN	E6 B97, B99 E92 B71 B72	UO2SPC11 VPWR HTR12 SIGRTN HO2S12
All other vehicles	198 PIN	E36 E35 E83 B90 B91 B97, B99 E78 B71 B72	UO2SPC21 UO2SPC11 HTR22 SIGRTN HO2S22 VPWR HTR12 SIGRTN HO2S12