System Operation
Starting System - with Intelligent Access (IA)
System Operation
System Diagram
Network Message Chart
Module Network Input Messages PCM (Powertrain Control Module)
Module Network Input Messages BCM (Body Control Module)
Starting System
This vehicle is equipped with a PATS (Passive Anti-Theft System) that disables the engine from cranking if an unprogrammed PATS (Passive Anti-Theft System) key is used or an invalid PCM (Powertrain Control Module) ID is received. The PATS (Passive Anti-Theft System) is controlled by the BCM (Body Control Module). If there is a PATS (Passive Anti-Theft System) concern that causes the engine to be disabled, the IPC (Instrument Panel Cluster) displays the corresponding message in the message center. REFER to Passive Anti-Theft System (PATS) .
Ignition modes are controlled by the RFA (Remote Function Actuator) module and the BCM (Body Control Module). REFER to Push-Button Start - with Intelligent Access (IA) .
The start/stop switch is connected to the RFA (Remote Function Actuator) module and the BCM (Body Control Module) as a backup in case of a failure. If there is a circuit failure to either module from the start/stop switch, the modules communicate the start/stop switch request to each other over the MS-CAN (Medium Speed Controller Area Network).
During a start event, the start/stop switch is pressed in combination with either the brake pedal (automatic transmission) or clutch pedal (manual transmission) input. The RFA (Remote Function Actuator) module, the BCM (Body Control Module) and the PCM (Powertrain Control Module) receive a request to start the engine. The PCM (Powertrain Control Module) recognizes the correct inputs 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 (Powertrain Control Module) disengages the starter motor once an engine RPM (Revolutions Per Minute) threshold is reached, a set crank time is exceeded or the stop/start switch is pressed indicating an engine shutdown.