No Communication From A Control Module

The infotainment control module (ICM) knows which control modules are connected to the MOST network. If any control module on the MOST network stops communicating, a diagnostic trouble code (DTC) is stored in the infotainment control module (ICM). There is a diagnostic trouble code (DTC) for each control module on the MOST network for this fault. The diagnostic trouble codes (DTCs) are ICM-1A51 to ICM-1A57.

Diagnostic trouble codes (DTCs) for missing communication are also stored for additional GPS and TMC units which are connected to the antenna module (ATM). The diagnostic trouble codes (DTCs) are ICM-1A58 and ICM-1A59.

Missing communication may be due to an internal fault in the control module or because the function is incorrectly implemented in the control module.