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) Purge Valve Connector, Harness Side ( - )
VPWR | Ground |
Is the voltage greater than 10.5 V?
Yes | No |
|---|---|
GO to HX6 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
HX6 CHECK THE EVAPCP CIRCUIT FOR AN OPEN
• Ignition OFF.
• PCM connector disconnected.
• Measure the resistance between:
( + ) Evaporative Emission (EVAP) Purge Valve Connector, Harness Side | ( - ) PCM Connector, Harness Side |
|---|---|
EVAPCP | EVAPCP |
Is the resistance less than 5 ohms?
Yes | No |
|---|---|
GO to HX7 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
HX7 CHECK THE EVAPCP CIRCUIT FOR A SHORT TO GROUND
• Measure the resistance between:
( + ) Evaporative Emission (EVAP) Purge Valve Connector, Harness Side | ( - ) |
|---|---|
EVAPCP | Ground |
Is the resistance greater than 10K ohms?
Yes | No |
|---|---|
GO to HX8 . | REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. |
HX8 CHECK THE EVAPCP CIRCUIT FOR A SHORT TO VOLTAGE
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) Evaporative Emission (EVAP) Purge Valve Connector, Harness Side | ( - ) |
|---|
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.