U0102 Code: Meaning, Causes, and Symptoms | OBD2 Codes
U0102 – Lost Communication with Transfer Case Control Module
U0102 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
U0102 Possible Causes
Faulty Transfer Case Control Module,Transfer Case Control Module harness is open or shorted,Transfer Case Control Module circuit poor electrical connection
Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module.