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.
KG9 CARRY OUT A THOROUGH WIGGLE TEST ON THE FUEL INJECTOR HARNESS
• Ignition OFF.
• INJ connector connected.
• Ignition ON, engine running.
• Engine at normal operating temperature.
• Access the PCM and monitor the INJ_F (MODE) PID.
• Wiggle, shake, and bend small sections of the wiring harness while working from the fuel injector to the PCM.
Are any injector values fluctuating in and out of range?
Yes | No |
|---|---|
ISOLATE the concern and REPAIR as necessary. Clear the PCM DTCs. REPEAT the self-test. | Unable to duplicate or identify the concern at this time. GO to Pinpoint Test Z . |
KG10 CHECK FOR CORRECT PCM OPERATION
• Disconnect all the PCM connectors.
• Visually inspect for:
◾ pushed out pins ◾ corrosion
• Connect all the PCM connectors and make sure they seat correctly.
• Carry out the PCM self-test.
• Verify the concern is still present.
Is the concern still present?
Yes | No |
|---|---|
INSTALL a new PCM. REFER to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM), Programming the VID Block for a Replacement PCM. | The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. |
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.