Module Controlled Functions - System Operation and Component Description

Post Crash Alert Function

The post crash alert is a function controlled by the BCM. If the RCM determines an impact of enough severity has occurred (the airbags may or may not be deployed), the post crash alert function activates.

The post crash alert function:

sounds the horn. turns on the hazard lights. turns on the interior lights. unlocks the doors.

The post crash alert function can be turned off by:

pressing the hazard flasher lamp switch (which may need to be pressed twice). pressing the transmitter unlock button. pressing the RKE transmitter PANIC button. cycling the ignition switch (RUN-OFF-RUN-OFF-RUN). opening the driver door.

Factory-Transport Mode

During vehicle build, some modules (such as the IPC and the BCM) are set to factory mode. When the vehicle build is complete, the vehicle is set to transport mode.

Transport mode is used to reduce the drain on the battery during longer periods when the vehicle is not used. Various system functions can be altered or disabled when in the transport mode. While in transport mode, the IPC displays TRANSPORT MODE in the message center. Transport mode can be disabled and placed into normal operation mode. Refer to: Transport and Factory Mode Deactivation (419-10) .

Car Configuration Parameters

The parameters are set in the BCM. The parameters are also set in the IPC as backup data for service, in case online As-Built data is not available. For more information, Refer to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).

Steering Column Lock Module

The steering column lock module locks and unlocks the steering column based on commands received from the BCM. For more information, Refer to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01B Passive Anti-Theft System (PATS), Description and Operation).

When the steering column lock module is replaced, the BCM must be configured/trained to the new steering column lock module for the steering column lock module to operate correctly. Refer to: Anti-Theft Security Access (419-01B Passive Anti-Theft System (PATS), General Procedures).

BCMB

The BCMB controls various systems by monitoring inputs from switches, sensors and messages sent from other modules on the MS-CAN. Based on the inputs received, the BCMB activates outputs. For example, the BCM-B monitors the stoplamp switch and messages received from the BCM regarding ignition state and door ajar status. Based on this input, the BCMB may provide voltage to the stoplamps or activate the ambient lighting. For a list of BCMB controlled functions, Refer to: Module Controlled Functions - Overview (419-10 Multifunction Electronic Modules, Description and Operation).

Component Description

BCM

The BCM is a multifunction module that requires a PMI when replaced.