Pinpoint Test DW: Heated Oxygen Sensor (HO2S): Introduction: 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)
- harness circuits: HO2S12, HO2S22, HTR12, HTR22, VPWR and SIGRTN
- PCM (12A650)
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.
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.
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 |