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PINPOINT TEST H: Fuel Control: Introduction

WARNING: Crown Victoria Police Interceptor vehicles equipped with fire suppression system, refer to FIRE SUPPRESSION SYSTEM article for Important Safety Warnings. Failure to follow these instructions may result in personal injury.
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:

Fig 1: Identifying HO2S Location
GF0001568Courtesy of FORD MOTOR CO.
Fig 2: Identifying HO2S Location
GF0001569Courtesy of FORD MOTOR CO.

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

Fig 3: Heated Oxygen Sensor-Front (HO2S-Front) Connector - A
GF0001553Courtesy of FORD MOTOR CO.
Fig 4: Heated Oxygen Sensor-Front (HO2S-Front) Connector - B
GF0001498Courtesy of FORD MOTOR CO.
Fig 5: Heated Oxygen Sensor-Front (HO2S-Front) Connector - C
GF0001566
Vehicle Connector Pin Circuit
E-Series,
Edge,
Escape,
F-Super Duty,
Freestar/Monterey,
Fusion,
Mariner,
Milan,
MKX,
MKZ
A 1
3
4
2
VPWR
SIGRTN
HO2S Signal
HO2S Heater
Expedition,
Navigator
B 1
3
4
2
VPWR
SIGRTN
HO2S Signal
HO2S Heater
Focus C 1
3
4
2
VPWR
SIGRTN
HO2S Signal
HO2S Heater
All other vehicles B 2
4
3
1
VPWR
SIGRTN
HO2S Signal
HO2S Heater

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

Fig 6: Heated Oxygen Sensor-Rear (HO2S-Rear) Connector - A
GF0001553Courtesy of FORD MOTOR CO.
Fig 7: Heated Oxygen Sensor-Rear (HO2S-Rear) Connector - B
GF0001566Courtesy of FORD MOTOR CO.
Fig 8: Heated Oxygen Sensor-Rear (HO2S-Rear) Connector - C
GF0001498
Vehicle Connector Pin Circuit
Escape,
F-150,
Freestar/Monterey,
Mariner,
Mark LT
A 1
3
4
2
VPWR
SIGRTN
HO2S Signal
HO2S Heater
Focus B 1
3
4
2
VPWR
SIGRTN
HO2S Signal
HO2S Heater
All other vehicles C 2
4
3
1
VPWR
SIGRTN
HO2S Signal
HO2S Heater

Powertrain Control Module (PCM) Connector 

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

Vehicle Connector Pin Circuit
E-Series 6.8L,
E-Series 5.4L 5R100,
F-Super Duty 6.8L
170 Pin T48
E70
B38
T47
E69
T25
E29
B14
T24
E28
B35
B41, E58, T41
HTR22
HTR21
HTR13
HTR12
HTR11
HO2S22
HO2S21
HO2S13
HO2S12
HO2S11
VPWR
SIGRTN
Edge,
MKX
190 Pin E2
E70
E1
E69
E24
E28
E23
E29
B51
B58, E58
HTR22
HTR21
HTR12
HTR11
HO2S22
HO2S21
HO2S12
HO2S11
VPWR
SIGRTN
Escape 3.0L,
Mariner 3.0L
150 (50-50-50) Pin T48
E48
T47
E49
T25
E26
T24
E30
B35
B41, E41, T41
HTR22
HTR21
HTR12
HTR11
HO2S22
HO2S21
HO2S12
HO2S11
VPWR
SIGRTN
Escape 2.3L,
Mariner 2.3L
150 (50-50-50) Pin T47
E49
T24
E30
B35
B41, E41, T41
HTR12
HTR11
HO2S12
HO2S11
VPWR
SIGRTN
Expedition,
Navigator
140 Pin B11
E70
B10
E69
B40
E28
B39
E29
B51
B58, E58
HTR22
HTR21
HTR12
HTR11
HO2S22
HO2S21
HO2S12
HO2S11
VPWR
SIGRTN
F-150,
Mark LT
190 Pin T12
E70
T1
E69
T21
E28
T22
E29
B51
B58, E58, T43
HTR22
HTR21
HTR12
HTR11
HO2S22
HO2S21
HO2S12
HO2S11
VPWR
SIGRTN
Five Hundred,
Freestyle,
Montego
150 (50-50-50) Pin T48
E50
T47
E49
T25
E31
T24
E30
B35
B41, E41, T41
HTR22
HTR21
HTR12
HTR11
HO2S22
HO2S21
HO2S12
HO2S11
VPWR
SIGRTN
Focus 150 (50-50-50) Pin T48
T47
E49
T25
T24
E30
B35
B41, E41, T41
HTR13
HTR12
HTR11
HO2S13
HO2S12
HO2S11
VPWR
SIGRTN
Freestar/Monterey,
Taurus
104 Pin 96
94
95
93
61
87
35
60
71
91
HTR22
HTR21
HTR12
HTR11
HO2S22
HO2S21
HO2S12
HO2S11
VPWR
SIGRTN
Fusion 2.3L PZEV,
Milan 2.3L PZEV
140 Pin E25
E23
E69
E5
E3
E28
B51
B58, E58
HTR13
HTR12
HTR11
HO2S13
HO2S12
HO2S11
VPWR
SIGRTN
Fusion 2.3L,
Milan 2.3L
140 Pin E23
E69
E3
E28
B51
B58, E58
HTR12
HTR11
HO2S12
HO2S11
VPWR
SIGRTN
Fusion 3.0L,
Milan 3.0L,
MKZ
140 Pin E24
E70
E23
E69
E4
E29
E3
E28
B51
B58, E58
HTR22
HTR21
HTR12
HTR11
HO2S22
HO2S21
HO2S12
HO2S11
VPWR
SIGRTN
Ranger 2.3L 170 Pin T47
E69
T24
E28
B35
B41, E58, T41
HTR12
HTR11
HO2S12
HO2S11
VPWR
SIGRTN
All other vehicles 170 Pin T48
E70
T47
E69
T25
E29
T24
E28
B35
B41, E58, T41
HTR22
HTR21
HTR12
HTR11
HO2S22
HO2S21
HO2S12
HO2S11
VPWR
SIGRTN