Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
DZ11 CHECK THE UO2SHTR CIRCUIT FOR AN INTERNAL SHORT TO GROUND
( + ) Universal HO2S Connector, Component Side | ( - ) |
|---|---|
UO2SHTR | Ground |
Is the resistance greater than 10K ohms?
Yes | No |
|---|---|
For DTCs P0030 or P0050, GO to DZ12 . For all others, GO to DZ28 . | INSTALL a new Universal HO2S. REFER to the Workshop Manual Section 303-14, Electronic Engine Controls. RESET the keep alive memory (KAM). REFER to Section 2, Resetting The Keep Alive Memory (KAM). REPEAT the self-test. |
DZ12 CHECK THE UO2S AND UO2SGREF CIRCUITS FOR AN OPEN
• Ignition OFF.
• Universal HO2S connector disconnected.
• PCM connector disconnected.
• Measure the resistance between:
( + ) Universal HO2S Connector, Harness Side | ( - ) PCM Connector, Harness Side |
|---|---|
UO2S | UO2S |
UO2SGREF | UO2SGREF |
Are the resistances less than 5 ohms?
Yes | No |
|---|---|
GO to DZ13 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
DZ13 CHECK THE UO2S, UO2SGREF, UO2SPC, AND UO2SPCT CIRCUITS FOR A SHORT TO GROUND
Note: This pinpoint test is designed to diagnose multiple circuits in the same test steps, only measure the circuits that apply to the vehicle being diagnosed.
• Measure the resistance between:
( + ) Universal HO2S Connector, Harness Side | ( - ) |
|---|---|
UO2S | Ground |
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.