Circuit Description
WARNING: This page is about a different car, the 2004 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Engine drag control (EDC) The EBCM sends a engine drag control (EDC) request via a dedicated data line. The PCM supplies a pull up voltage of 5 volts that the EBCM switches to ground to create the signal.