Body Control Module

In vehicles not equipped with the optional PEKG system, the SKIS control circuitry integral to the BCM includes a Radio Frequency (RF) transceiver.

Inputs without PEKG: 

• PCM DTC status
• Odometer total request
• Remote start activation status
• Key transponder ID info
• Driver door ajar status
• Ignition and operational mode status
• Key in ignition status
• IMMO_Code request from PCM
• Power mode status

Outputs without PEKG: 

• Key transponder authentication/read request
• IPC warning light status
• IMMO_Code response to PCM

Inputs with PEKG: 

• Key transponder authentication/read request
• Ignition and operational mode status
• TRM_Code request from BCM

Outputs with PEKG: 

• Key transponder ID info
• TRM_Code response to BCM

The BCM includes the logic and control circuits for the VTA. Each of the ajar switches provides hard wired inputs to the BCM, while the BCM provides control outputs to the vehicle horns and lighting systems. In vehicles not equipped with the optional PEKG system, the BCM also monitors the status of the ignition switch through a hard wired input. In vehicles equipped with the PEKG system, the RFH monitors the status of the KIN through a private Security K-line data bus and relays this information to the BCM as electronic messages transmitted over the CAN-C data bus.

Inputs: 

• Key in ignition status
• All door, liftgate and hood ajar switch status
• Power mode status
• Key transponder status
• Operation mode status
• Intrusion attempt status
• Remote start activity

Outputs: 

• Audio alert initiation
• Alarm indication to IPC
• Theft alarm status on CAN-C data bus
• Alarm cause status on CAN-C data bus
• Lighting alert initiation
• Theft alarm status to the RFH

The BCM reads all hardwired ajar switches inputs through an internal pull-up resistor, then uses this input to control other electronic functions and features of the vehicle. The BCM may also send electronic ajar switch status  messages to other electronic modules in the vehicle over the CAN-C data bus.

In vehicles not equipped with the optional PEKG system, the SKIS control circuitry integral to the BCM includes a Radio Frequency (RF) transceiver.