Code 75: No Serial Data From Pcm: Notes
PCM and ABS module constantly send messages back and forth, mainly to activate traction control system.
Code 75 will set if no serial data messages have been received by ABS module from PCM for 7 continuous seconds, and vehicle speed is at least 3 MPH. Once Code 55 is set, it will remain active for remainder of ignition cycle. SERVICE light will illuminate. See Fig 1 .