Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

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