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.
( + ) Evaporative Emission (EVAP) Vapor Blocking Valve Connector, Harness Side | ( - ) PCM Connector, Harness Side |
|---|---|
VBV - Pin 1 | VBV |
Is the resistance less than 5 ohms?
Yes | No |
|---|---|
GO to HX33 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
HX33 CHECK THE VBV CIRCUIT FOR A SHORT TO GROUND
• Measure the resistance between:
( + ) Evaporative Emission (EVAP) Vapor Blocking Valve Connector, Harness Side | ( - ) |
|---|---|
VBV - Pin 1 | Ground |
Is the resistance greater than 10K ohms?
Yes | No |
|---|---|
GO to HX34 . | REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. |
HX34 CHECK THE VBV CIRCUIT FOR A SHORT TO VOLTAGE
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) Evaporative Emission (EVAP) Vapor Blocking Valve Connector, Harness Side | ( - ) |
|---|---|
VBV - Pin 1 | Ground |
Is any voltage present?
Yes | No |
|---|---|
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. | INSTALL a new Evaporative Emission (EVAP) Vapor Blocking valve. REFER to the Workshop Manual Section 303-13, Evaporative Emissions. Clear the PCM DTCs. REPEAT the self-test. |
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.