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.
A4 CHECK THE FLASH EEPROM PROGRAMMING SIGNAL (FEPS) CIRCUIT FOR A SHORT TO VOLTAGE
Note: For vehicles without a FEPS circuit, follow the Yes answer.
• Ignition OFF.
• ETBTPS connector connected.
• Ignition ON, engine OFF.
• Measure the voltage between:
( + ) DLC, Harness Side | ( - ) Vehicle Battery |
|---|---|
FEPS - Pin 13 | Negative terminal |
Is the voltage less than 9 V?
Yes | No |
|---|---|
GO to A5 . | REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. |
A5 CHECK THE RPM IN THE PCM
Note: Connect the scan tool to a voltage source that is powered with the ignition in the START position (such as directly to the vehicle battery). Also verify that the vehicle battery is fully charged.
Note: Normal engine cranking speed is between 150 RPM and 350 RPM.
• Access the PCM and monitor the RPM (RPM) PID.
• Crank the engine while viewing the RPM PID.
Is the RPM between 150 RPM - 350 RPM?
Yes | No |
|---|---|
GO to A6 . | For base engine concerns, REFER to the Workshop Manual Section 303-00, Engine System - General Information, and DIAGNOSE difficult starting symptom. For all others, GO to JD2 . |
A6 CHECK FOR CRANKSHAFT POSITION (CKP) AND CAMSHAFT POSITION (CMP) SYNCHRONIZATION
• Access the PCM and monitor the SYNC (MODE) PID.
• Crank the engine while viewing the SYNC PID.
Does the SYNC PID read YES?
Yes | No |
|---|---|
GO to A7 . | GO to Pinpoint Test JD . |
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.