Pinpoint Test Dz: Universal Heated Oxygen Sensor (Ho2S): 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.

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)

Fig 1: Universal HO2S Connector

Courtesy of FORD MOTOR CO.

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