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.
Is the resistance less than 5 ohms?
Yes | No |
|---|---|
GO to DD4 . | REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test. |
DD4 CHECK THE FLP CIRCUIT FOR A SHORT TO GROUND
• Measure the resistance between:
( + ) Fuel Pressure Sensor Connector, Harness Side | ( - ) |
|---|---|
FLP - Pin 1 | Ground |
Is the resistance greater than 10K ohms?
Yes | No |
|---|---|
GO to DD5 . | REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. |
DD5 CHECK THE FLP CIRCUIT FOR A SHORT TO VOLTAGE
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) Fuel Pressure Sensor Connector, Harness Side | ( - ) |
|---|---|
FLP - Pin 1 | Ground |
Is any voltage present?
Yes | No |
|---|---|
REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. | GO to DD6 . |
DD6 CHECK THE FLP CIRCUIT FOR AN INTERMITTENT CONCERN
• Ignition OFF.
• Fuel Pressure Sensor connector connected.
• PCM connector connected.
• Ignition ON, engine OFF.
• Access the PCM and monitor the FLP_V (VOLT) PID.
• While observing the PID, carry out the following:
◾ Tap on the sensor to simulate road shock ◾ Wiggle the sensor connector ◾ Wiggle, shake, and bend small sections of the wiring harness while working from the
sensor to the PCM
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.