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.
Powertrain DTC Charts and Descriptions 4-147
Diagnostic Trouble Code (DTC) Charts and Descriptions
U210B - Lost Communication Between Fuel Pump Control Module A And Restraints Control Module
Description: The fuel pump control module monitors the duty cycle and frequency of the signal it receives from the restraints
control module (RCM). The fuel pump control module determines if the signal on the ENS circuit from the RCM is a valid duty cycle and frequency. If the duty cycle or frequency is invalid, the fuel pump control module sends a 40% duty cycle signal on the FPM circuit to report the concern to the PCM. This DTC sets when the fuel pump control module is still reporting that it is receiving an invalid duty cycle or frequency from the RCM after a calibrated amount of time.
Possible Causes: • ENS circuit open or short to ground
• ENS circuit short to voltage
• Radio frequency interference or electromagnetic interference
• Damaged fuel pump control module
• Damaged RCM
Diagnostic Aids: Check the harness for routing, alterations, incorrect shielding, or electrical interference from other systems. The
ENS is used to notify the fuel pump control module of an event requiring the fuel pump to be disabled. The fuel pump control module monitors the ENS signal by sending a 12V low current signal on the ENS circuit to the RCM.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test KC.
U300C - Ignition Input Off/On/Start
Description: The PCM monitors the ignition key state. This DTC sets when the key state is not available.
Possible Causes: • ISP-R circuit open
• ISP-R circuit short to ground
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test B.
Uxxxx - Network Communication Diagnostic Trouble Code (DTC)
Description: Powertrain related DTC from another module.
Possible Causes: • Communication error
Diagnostic Aids: Network DTC concerns occur during module to module communication. Refer to the Workshop Manual Section
418-00 Module Communications Network, Communication Network Diagnostic Trouble Codes (DTC) Index to continue diagnosis.
Application Key On Engine Off Key On Engine Running Continuous Memory
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
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.