Starting System

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: This vehicle is equipped with Passive Anti-Theft System (PATS) that disables the engine from cranking if an unprogrammed Passive Anti-Theft System (PATS) key is used or an invalid Powertrain Control Module (PCM) ID is received. Passive Anti-Theft System (PATS) is controlled by the Body Control Module (BCM). If there is a Passive Anti-Theft System (PATS) concern that cause the engine to be disabled, the Instrument Panel Cluster (IPC) displays "STARTING SYSTEM FAULT" in the message center. Anti-Theft Passive Anti-Theft System (PATS) .

The RFA module in conjunction with the BCM controls the ignition modes and in conjunction with the PCM controls the starting system.

Under normal operation, during a start event, the start/stop switch is pressed in combination with the brake pedal, the RFA module, PCM and BCM receives a request to start the engine. The PCM requires input voltage from the Run/start relay.

The PCM recognizes the correct inputs from the BCM and TR sensor and provides voltage and ground to energize the starter relay coil and close the starter relay contacts. The starter relay contacts close, providing voltage to the starter solenoid, allowing the starter motor to crank the engine. The PCM disengages the starter motor once an engine Revolutions Per Minute (RPM) threshold is reached, a set crank time is exceeded or the stop/start button is pressed indicating an engine shutdown.

If cumulative crank time exceeds 60 seconds within 60 minutes, the starter will be inhibited for 15 minutes and the PCM sets a DTC. Refer to the Owner's Literature for more information.