Component Description

Body Control Module (BCM) 

The BCM is the gateway module, translating messages on the HS-CAN to MS-CAN. This allows a message to be distributed throughout both networks.

Intelligent Access (IA) Key 

The IA key incorporates both the PATS and the RKE transmitter functions in a single device. The IA key must be located inside the vehicle for engine starting. When the IA key is activated it sends out a frequency signal that is received by the TPM. The IA key also contains a key blade that is used to enter the vehicle as a backup.

Start-Stop Switch 

The start/stop switch is a momentary contact switch that is hardwired to the RFA module, BCM, and PCM. When the switch is pressed, it signals the RFA module, BCM and PCM that there is a request to either switch the ignition on or start the engine. The start/stop switch is connected to both modules 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.

Remote Function Actuator (RFA) Module 

The RFA module interprets radio frequency signals from the TPM module and IA key transmitters. The RFA module receives input signals from various modules and other components. Based on this information, the RFA module generates an output signal to control various components (door locks, liftgate, etc.).

PCM 

The PCM receives input signals from sensors and other components (switches, relays). Based on this information, the PCM generates output signals to control various relays, solenoids and actuators.

Tire Pressure Monitor (TPM) Module 

The TPM module is a receiving antenna that receives high frequency signals. When a remote start request is initiated from the IA key the TPM module receives the signal and communicates the remote start request message to the RFA module. The RFA module transmits the message via the MS-CAN to the BCM to initiate a remote start event.

Transmission Range (TR) Sensor 

The TR sensor is located inside of the transmission and indicates gearshift position to the PCM. The PCM uses that information to enable the starting system to start the engine in PARK or NEUTRAL. For vehicles with 6F35, REFER to Automatic Transmission - 6F35 . For vehicles with 6F50 or 6F55, REFER to Automatic Transmission - 6F50/6F55 .