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.
C17 CHECK THE REFERENCE VOLTAGE WITH THE CPP SENSOR CONNECTED
• Ignition OFF.
• CPP Sensor connector connected.
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) Suspect Sensor Connector, Harness Side | ( - ) |
|---|---|
VREF | Ground |
Is the voltage between 4.5 - 5.5 V?
Yes | No |
|---|---|
GO to C18 . | INSTALL a new CPP sensor. REFER to the Workshop Manual Section 303-14, Electronic Engine Controls. Clear the PCM DTCs. REPEAT the self-test. |
C18 CHECK THE REFERENCE VOLTAGE WITH THE ACP TRANSDUCER SENSOR CONNECTED
Note: If the vehicle is not equipped with an ACP transducer sensor or if this sensor was used for the VREF measurement in C3, GO to C19 .
• Ignition OFF.
• Air Conditioning Pressure (ACP) Transducer Sensor connector connected.
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) Suspect Sensor Connector, Harness Side | ( - ) |
|---|---|
VREF | Ground |
Is the voltage between 4.5 - 5.5 V?
Yes | No |
|---|---|
GO to C19 . | INSTALL a new Air Conditioning Pressure (ACP) Transducer Sensor. Clear the PCM DTCs. REPEAT the self-test. |
C19 CHECK THE REFERENCE VOLTAGE WITH THE FUEL PRESSURE SENSOR CONNECTED
Note: If the vehicle is not equipped with a fuel pressure sensor or if this sensor was used for the VREF measurement in C3, GO to C20 .
• Ignition OFF.
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.