Idle Boost Functions

The Dash Integration Module (DIM) sends a serial data request to the PCM to increase the idle speed to manage the electrical system and preserve the vehicle electrical power availability. The PCM then adjusts the idle speed by using a special program and idle speed ramp calculations to prevent driveability and safety concerns. The idle speed boost and cancel function will vary from vehicle to vehicle and from one moment to another on the same vehicle. This happens because the PCM responds to changes in the inputs from the various sensors used to control the powertrain.