Scan Tool Does Not Communicate With UART Device

SCAN TOOL DOES NOT COMMUNICATE WITH UART DEVICE









Circuit Description
The UART protocol utilizes a single wire bi-directional data line used to exchange information between the modules.

The following modules are connected to the serial data circuit:
-> Powertrain interface module (PIM)
-> Body control module (BCM)
-> Instrument panel cluster (IPC)
-> Electronic brake control module (EBCM)
-> Sensing and diagnostic module (SDM)
-> Radio