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.
Description and Operation 1-49
Powertrain Control Hardware
seconds, depending on application, as soon as the dome light is commanded ON. This causes the fuel pump control module and the fuel pump to cycle for 1 or 2 seconds and purge any trapped air or fuel vapor from the high pressure fuel system.
Fuel Injector Heater Control Module
The fuel injector heater control module supplies direct battery voltage to the individual fuel injector heaters. The fuel injector heater ON time varies depending on ambient and engine coolant temperatures. The PCM may activate the fuel injector heaters any time the engine is running during cold ambient temperatures. The PCM monitors the fuel injector heater functionality and control. If a concern is present, a DTC will set. For additional information, refer to Cold Start System in this section.
Fuel Injector Heater Control Module
Keep Alive Memory (KAM)
The PCM stores information about vehicle operating conditions in the KAM (a memory integrated circuit chip) and then uses this information to compensate for component variability. The KAM remains powered when the ignition is in the OFF position so the information is not lost.
Power and Ground Signals
Accelerator Pedal Position Reference Voltage (APPVREF)
The APPVREF is a consistent positive voltage (5 volts plus or minus 0.5 volt) circuit.
Accelerator Pedal Position Return (APPRTN)
The APPRTN is a return path for APPVREF circuit.
Electronic Throttle Control Reference Voltage (ETCREF)
The ETCREF is a consistent positive voltage (5 volts plus or minus 0.5 volt) circuit.
Electronic Throttle Control Return (ETCRTN)
The ETCRTN is a return path for ETCREF circuit.
Gold Plated Pins
2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015
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.