With Intelligent Access (IA)

Starting System

Principles of Operation - With Intelligent Access (IA)

NOTE: This vehicle is equipped with Passive Anti-Theft System (PATS) that disables the engine if an unprogrammed PATS (Passive Anti-Theft System) key is used or an invalid PCM ID is received. PATS (Passive Anti-Theft System) is controlled by the Remote Function Actuator (RFA) module, BCM (Body Control Module) and PCM. If the PATS (Passive Anti-Theft System) disables the engine from starting, the IPC (Instrument Panel Cluster) displays "STARTING SYSTEM FAULT" in the message center. Refer to Antitheft and Alarm Systems to diagnose a PATS (Passive Anti-Theft System) concern.

The RFA (Remote Function Actuator) module and the BCM (Body Control Module) controls the ignition modes and in conjunction with the PCM controls the IA (Intelligent Access) starting system. Under normal operation during a start event, the following inputs are received:

- Start/stop switch pressed

- Brake pedal applied

- PATS (Passive Anti-Theft System) enabled status

- Correct transmission PARK or NEUTRAL input from the Transmission Range (TR) sensor

When the PCM receives the correct inputs, voltage and ground is supplied to the starter relay coil. The starter relay coil is energized causing the relay contacts to close providing voltage to the starter solenoid, allowing the starter motor to crank and start the engine. The PCM disengages the starter once an engine rpm threshold is reached, a set crank time is exceeded or the start/stop switch is pressed indicating an engine shutdown.