Envoy 2WD L6-4.2L (2008)
or not. Failsofting is the ability to substitute a signal with a default value or a default algorithm, in the absence of a valid signal. Some messages are also
interpreted as a "heartbeat" of a virtual device. If such a signal is lost, the application will set a no communication code against the respective virtual
device. Note that a loss of serial data DTC does not normally represent a failure of the module that set it.
The following modules are connected to the high speed GMLAN serial data communication circuits:
*
The transmission control module (TCM)
*
The ECM
The interaction between high speed GMLAN and class 2 is assured by ECM, which acts as a gateway between the links.