Scan Tool Does Not Communicate With UART Data Line

Scan Tool Does Not Communicate with UART Data Line

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

Scan Tool Does Not Communicate With UART Data Line (1 Of 2):

Scan Tool Does Not Communicate With UART Data Line (2 Of 2):

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