Pinpoint Test Dz: Universal Heated Oxygen Sensor (Ho2S): Introduction
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2009 Mercury Mountaineer, 2009 Mercury Milan, 2009 Mercury Mariner, 2009 Mercury Grand Marquis, and 2009 Lincoln Town Car. 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.
NOTE:
Only diagnose the suspect universal HO2S indicated by the DTC.
This pinpoint test is intended to diagnose the following:
- universal HO2S (9Y460)
- harness circuits: UO2S, UO2SGREF, UO2SHTR, UO2SPC, UO2SPCT, and VPWR
- powertrain control module (PCM) (12A650)
POWERTRAIN CONTROL MODULE (PCM) CONNECTOR
| Vehicle | Connector | Pin | Circuit |
|---|---|---|---|
| E-Series, Expedition, F-150, Navigator |
190-Pin | E38 E39 E26 E25 E69 E70 E23 E24 E11 E12 |
UO2S11 UO2S21 UO2SGREF11 UO2SGREF21 UO2SHTR11 UO2SHTR21 UO2SPC11 UO2SPC21 UO2SPCT11 UO2SPCT21 |
| All other vehicles | 190-Pin | E18 E20 E19 E21 E69 E70 E4 E6 E5 E7 |
UO2S11 UO2S21 UO2SGREF11 UO2SGREF21 UO2SHTR11 UO2SHTR21 UO2SPC11 UO2SPC21 UO2SPCT11 UO2SPCT21 |