U210B FORD – Lost Communication Between Fuel Pump Control Module ‘A’ and Restraints Control Module

U210B FORD Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

U210B FORD Possible Causes

Event Notification Signal (ENS) harness is open or shorted,Event Notification Signal (ENS) circuit poor electrical connection,Radio frequency interference or electromagnetic interference,Faulty Restraints Control Module (RCM),Faulty Fuel Pump Control Module

U210B FORD 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 Event Notification Signal (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 Fuel Pump Monitor (FPM) circuit to report the concern to the Powertrain Control Module (PCM). The test fails 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.